JP2000331686A - Non-aqueous electrolyte secondary battery - Google Patents
Non-aqueous electrolyte secondary batteryInfo
- Publication number
- JP2000331686A JP2000331686A JP11140623A JP14062399A JP2000331686A JP 2000331686 A JP2000331686 A JP 2000331686A JP 11140623 A JP11140623 A JP 11140623A JP 14062399 A JP14062399 A JP 14062399A JP 2000331686 A JP2000331686 A JP 2000331686A
- Authority
- JP
- Japan
- Prior art keywords
- secondary battery
- electrolyte secondary
- aqueous electrolyte
- material layer
- positive electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000011255 nonaqueous electrolyte Substances 0.000 title claims abstract description 46
- 239000004020 conductor Substances 0.000 claims abstract description 44
- 239000007774 positive electrode material Substances 0.000 claims abstract description 21
- 239000007773 negative electrode material Substances 0.000 claims abstract description 17
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000919 ceramic Substances 0.000 claims abstract description 9
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 18
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 15
- 229910052744 lithium Inorganic materials 0.000 claims description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 7
- 238000007600 charging Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 7
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 239000010439 graphite Substances 0.000 claims description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052787 antimony Inorganic materials 0.000 claims description 3
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 2
- 229910001887 tin oxide Inorganic materials 0.000 claims description 2
- 238000012360 testing method Methods 0.000 description 15
- 239000002002 slurry Substances 0.000 description 10
- 239000002033 PVDF binder Substances 0.000 description 6
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 6
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 239000011149 active material Substances 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
- 229910015643 LiMn 2 O 4 Inorganic materials 0.000 description 2
- 229910003481 amorphous carbon Inorganic materials 0.000 description 2
- -1 and the like Substances 0.000 description 2
- 239000003125 aqueous solvent Substances 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000006258 conductive agent Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- 238000003411 electrode reaction Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 2
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- ZZXUZKXVROWEIF-UHFFFAOYSA-N 1,2-butylene carbonate Chemical compound CCC1COC(=O)O1 ZZXUZKXVROWEIF-UHFFFAOYSA-N 0.000 description 1
- UUAMLBIYJDPGFU-UHFFFAOYSA-N 1,3-dimethoxypropane Chemical compound COCCCOC UUAMLBIYJDPGFU-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910015015 LiAsF 6 Inorganic materials 0.000 description 1
- 229910013063 LiBF 4 Inorganic materials 0.000 description 1
- 229910013290 LiNiO 2 Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- FKQOMXQAEKRXDM-UHFFFAOYSA-N [Li].[As] Chemical compound [Li].[As] FKQOMXQAEKRXDM-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- MCVFFRWZNYZUIJ-UHFFFAOYSA-M lithium;trifluoromethanesulfonate Chemical compound [Li+].[O-]S(=O)(=O)C(F)(F)F MCVFFRWZNYZUIJ-UHFFFAOYSA-M 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910001437 manganese ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
(57)【要約】
【課題】マンガン酸リチウムを正極活物質に用いた非水
電解液二次電池において、サイクル寿命特性を向上させ
る。
【解決手段】正極活物質層や負極活物質層の表面に炭素
材料、金属粉末又は導電性セラミックなどからなる導電
性材料の層を設ける。そして、これらの導電性材料の層
を設けた正極板又は負極板を用いて、非水電解液二次電
池を作製する。
(57) [Problem] To improve cycle life characteristics of a non-aqueous electrolyte secondary battery using lithium manganate as a positive electrode active material. A conductive material layer made of a carbon material, metal powder, conductive ceramic, or the like is provided on a surface of a positive electrode active material layer or a negative electrode active material layer. Then, a non-aqueous electrolyte secondary battery is manufactured using the positive electrode plate or the negative electrode plate provided with these conductive material layers.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は正極活物質として、
マンガン酸リチウムを用いた非水電解液二次電池におけ
るサイクル寿命特性の改良に関するものである。TECHNICAL FIELD The present invention relates to a positive electrode active material,
The present invention relates to improvement of cycle life characteristics in a non-aqueous electrolyte secondary battery using lithium manganate.
【０００２】[0002]
【従来の技術】リチウム二次電池に代表される非水電解
液二次電池は、高エネルギー密度であるメリットを活か
して、主にＶＴＲカメラやノートパソコン、携帯電話な
どのポータブル機器に使用されている。そして、近年は
電気自動車用又は電力貯蔵用を目的とした、大形リチウ
ム二次電池の研究開発が活発に行われている。2. Description of the Related Art A non-aqueous electrolyte secondary battery represented by a lithium secondary battery takes advantage of its high energy density and is mainly used in portable equipment such as VTR cameras, notebook computers, and mobile phones. I have. In recent years, research and development of large lithium secondary batteries for electric vehicles or for power storage have been actively conducted.
【０００３】負極活物質に金属リチウムやリチウム合金
を用いる非水電解液二次電池は、充電時にデンドライト
状のリチウムが負極に析出し、セパレータを通して正極
と内部短絡を起こすなどの問題点があった。そこで、炭
素材料を負極用活物質として使用する、非水電解液二次
電池が開発されている。A non-aqueous electrolyte secondary battery using metallic lithium or a lithium alloy as a negative electrode active material has a problem that during charging, dendritic lithium precipitates on the negative electrode and causes an internal short circuit with the positive electrode through the separator. . Therefore, a non-aqueous electrolyte secondary battery using a carbon material as an active material for a negative electrode has been developed.
【０００４】正極活物質にはコバルト酸リチウム（LiCo
O2）、ニッケル酸リチウム（LiNiO2）、マンガン酸リチ
ウム（LiMn2O4）等が一般的に用いられている。前記し
た各種の正極活物質と、黒鉛やカーボンブラックなどの
導電剤及びバインダなどを混合して混合物を作製し、該
混合物に溶媒を加えて混練してスラリーを作製する。そ
して、該スラリーをアルミニウム箔などの集電体に塗着
・乾燥して正極板を形成している。なお、結晶にスピネ
ル構造を有するマンガン酸リチウムは、コバルト酸リチ
ウムやニッケル酸リチウムに比べて熱的安定性に優れる
という特長がある。そして、マンガンはコバルトやニッ
ケルに比べて資源も豊富であり安価である。そこで、マ
ンガン酸リチウムを正極活物質に用いた非水電解液二次
電池は、上記した電気自動車用又は電力貯蔵用を目的と
する、大形のリチウム二次電池に適するものとして注目
されている。The positive electrode active material is lithium cobalt oxide (LiCo).
O 2 ), lithium nickelate (LiNiO 2 ), lithium manganate (LiMn 2 O 4 ) and the like are generally used. A mixture is prepared by mixing the above-described various positive electrode active materials, a conductive agent such as graphite or carbon black, a binder, and the like, and a solvent is added to the mixture and kneaded to prepare a slurry. Then, the slurry is applied to a current collector such as an aluminum foil and dried to form a positive electrode plate. Note that lithium manganate having a spinel structure in the crystal has a feature of being superior in thermal stability as compared with lithium cobaltate and lithium nickelate. Manganese is richer in resources and cheaper than cobalt and nickel. Therefore, non-aqueous electrolyte secondary batteries using lithium manganate as a positive electrode active material have been receiving attention as being suitable for large-sized lithium secondary batteries for the purpose of electric vehicles or power storage described above. .
【０００５】しかしながら、前記したマンガン酸リチウ
ムを用いた非水電解液二次電池は、充放電サイクルの進
行や長期間の放置によって放電容量が低下するという問
題点がある。この原因として、充放電によるリチウムイ
オンの脱離・挿入に伴い、マンガン酸リチウムの結晶が
膨張・収縮を繰り返すことや、マンガンイオンの溶出な
どによって、正極活物質層内の集電特性が低下するなど
の理由が考えられている。そして、前記した黒鉛やカー
ボンブラックなどの導電剤の添加のみでは、この問題点
の解決が難しいことが明らかになってきた。[0005] However, the nonaqueous electrolyte secondary battery using lithium manganate has a problem that the discharge capacity is reduced due to the progress of the charge / discharge cycle and the long-term storage. The reason for this is that the lithium manganate crystal repeatedly expands and contracts due to the desorption / insertion of lithium ions due to charge and discharge, and the elution of manganese ions causes the current collection characteristics in the positive electrode active material layer to deteriorate. Such reasons are considered. It has become clear that it is difficult to solve this problem only by adding a conductive agent such as graphite or carbon black.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、正極活物質
としてマンガン酸リチウムを用いた非水電解液二次電池
において、充放電サイクル特性を向上させることを目的
としている。SUMMARY OF THE INVENTION An object of the present invention is to improve the charge / discharge cycle characteristics of a non-aqueous electrolyte secondary battery using lithium manganate as a positive electrode active material.
【０００７】[0007]
【課題を解決するための手段】上記した問題点を解決す
るために、第一の発明では、放電、充電によりリチウム
を吸蔵、放出が可能なマンガン酸リチウム、導電材及び
結着剤を正極活物質層に用い、放電、充電によりリチウ
ムを放出、吸蔵が可能な炭素材料及び結着剤を負極活物
質層に用いた非水電解液二次電池において、前記正極活
物質層又は前記負極活物質層の少なくとも一方の表面
に、導電性材料の層を設けることを特徴としている。In order to solve the above-mentioned problems, in the first invention, lithium manganate capable of occluding and releasing lithium by discharging and charging, a conductive material and a binder are used as a positive electrode. In a non-aqueous electrolyte secondary battery using a carbon material and a binder capable of releasing and occluding lithium by discharging and charging and discharging lithium by using the material layer for the negative electrode active material layer, the positive electrode active material layer or the negative electrode active material A layer of a conductive material is provided on at least one surface of the layer.
【０００８】第二の発明では、前記導電性材料として炭
素粉末を用いることを特徴とし、第三の発明では、前記
炭素粉末として繊維状炭素又はグラファイトを用いるこ
とを特徴としている。The second invention is characterized in that carbon powder is used as the conductive material, and the third invention is characterized in that fibrous carbon or graphite is used as the carbon powder.
【０００９】第四の発明では、前記導電性材料として金
属粉末を用いることを特徴とし、第五の発明では、前記
金属粉末が銀、酸化スズ、アンチモン、ニッケル、アル
ミニウムのいずれかの粉末を含んでいることを特徴とし
ている。A fourth invention is characterized in that a metal powder is used as the conductive material. In the fifth invention, the metal powder contains any one of silver, tin oxide, antimony, nickel and aluminum. It is characterized by being in.
【００１０】第六の発明では、前記導電性材料として、
導電性セラミック繊維を用いることを特徴としている。In a sixth aspect, the conductive material includes:
It is characterized by using conductive ceramic fibers.
【００１１】[0011]
【発明の実施の形態】以下、本発明に係る非水電解液二
次電池について、図１を用いて具体的に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a non-aqueous electrolyte secondary battery according to the present invention will be specifically described with reference to FIG.
【００１２】１．正極の作製 正極は、厚さ20μmの正極集電体1（アルミニウム箔）と
正極活物質層2で構成される（図１）。平均粒径が20μm
のマンガン酸リチウム（LiMn2O4）の粉末、炭素粉末及
びバインダーであるポリフッ化ビニリデン（商品名：KF
#１1２０、呉羽化学工業(株)製、以下ＰＶＤＦと略す）
とを重量比80：12：8の配合で混合して混合粉末を作製
する。1. Preparation of Positive Electrode The positive electrode is composed of a positive electrode current collector 1 (aluminum foil) having a thickness of 20 μm and a positive electrode active material layer 2 (FIG. 1). Average particle size is 20μm
Lithium manganate (LiMn 2 O 4 ) powder, carbon powder and binder polyvinylidene fluoride (trade name: KF
# 1120, manufactured by Kureha Chemical Industry Co., Ltd., hereinafter abbreviated as PVDF)
Are mixed at a weight ratio of 80: 12: 8 to produce a mixed powder.
【００１３】前記した混合粉末に、分散溶媒となるＮ-
メチル-２-ピロリドン(以下、ＮＭＰと略す)を適量加え
て十分に混練してスラリーにする。このスラリーをロー
ル ｔｏロールの転写によってアルミニウム箔の両面に
塗着して乾燥して正極板を作製する。The above mixed powder is mixed with N-
An appropriate amount of methyl-2-pyrrolidone (hereinafter abbreviated as NMP) is added and sufficiently kneaded to form a slurry. This slurry is applied on both sides of an aluminum foil by roll-to-roll transfer and dried to produce a positive electrode plate.
【００１４】本発明は、正極活物質層の表面に導電性材
料の層を設けたものである。すなわち、後述する各種の
導電性材料とＰＶＤＦとを重量比97：3の配合で混合し
た後、ＮＭＰを適量加えて十分に混練、分散させてスラ
リーにする。ロールコータを用いて、このスラリーを前
記した正極板の活物質層の表面に塗布して乾燥させ、約
5μmの導電性材料の層を形成する。In the present invention, a conductive material layer is provided on the surface of the positive electrode active material layer. That is, after mixing various conductive materials described below and PVDF in a weight ratio of 97: 3, an appropriate amount of NMP is added, and the mixture is sufficiently kneaded and dispersed to form a slurry. Using a roll coater, apply this slurry to the surface of the active material layer of the positive electrode plate described above and dry it.
Form a 5 μm layer of conductive material.
【００１５】前記した、表面に導電性材料の層を有しな
い従来の正極板、又は導電性材料の層を有する本発明の
正極板は、ロ−ルプレス機でプレス（80℃〜120℃に加
熱したロールを使用、0.2〜0.5kgf／cmの圧力でプレ
ス）し、正極活物質層の密度が約2g/cm3になるまで圧縮
した。その後、幅が50mm、長さが450mmに切断して短冊
状の正極を作製した。The above-described conventional positive electrode plate having no conductive material layer on its surface or the positive electrode plate of the present invention having a conductive material layer is pressed by a roll press (heated to 80 to 120 ° C.). The pressed roll was pressed at a pressure of 0.2 to 0.5 kgf / cm), and compressed until the density of the positive electrode active material layer became about 2 g / cm 3 . Thereafter, the resultant was cut into a width of 50 mm and a length of 450 mm to produce a strip-shaped positive electrode.
【００１６】２．負極の作製 負極活物質の炭素材料としてリチウムイオンの吸蔵、放
出が可能な平均粒径20μmの非晶質炭素（商標名：カー
ボトロンＰ、呉羽化学工業株式会社製）、バインダーと
してＰＶＤＦを用いた。この非晶質炭素及びＰＶＤＦを
重量比で90：10となるように混合する。そして、この粉
末に分散溶媒となるＮＭＰを適量加えて十分に混練して
スラリーにする。このスラリーをロール ｔｏ ロールの
転写により、厚さ15μmの銅箔の両面に塗着して乾燥す
る。2. Production of Negative Electrode Amorphous carbon (trade name: Carbotron P, manufactured by Kureha Chemical Industry Co., Ltd.) having an average particle diameter of 20 μm capable of occluding and releasing lithium ions was used as a carbon material of the negative electrode active material, and PVDF was used as a binder. The amorphous carbon and PVDF are mixed so that the weight ratio becomes 90:10. Then, an appropriate amount of NMP as a dispersion solvent is added to this powder, and the mixture is sufficiently kneaded to form a slurry. This slurry is applied to both sides of a copper foil having a thickness of 15 μm by roll-to-roll transfer and dried.
【００１７】本発明は、負極活物質層の表面に導電性材
料の層を設けたものである。すなわち、後述する各種の
導電性材料とＰＶＤＦとを重量比97：3の配合で混合し
た後、ＮＭＰを適量加えて十分に混練してスラリーにす
る。ロールコータを用いて、このスラリーを前記した負
極板の活物質層の表面に塗布して乾燥させ、約5μmの導
電性材料の層を形成する。In the present invention, a conductive material layer is provided on the surface of the negative electrode active material layer. That is, after mixing various conductive materials described below and PVDF in a weight ratio of 97: 3, an appropriate amount of NMP is added and sufficiently kneaded to form a slurry. Using a roll coater, the slurry is applied to the surface of the active material layer of the negative electrode plate and dried to form a layer of a conductive material of about 5 μm.
【００１８】前記した、表面に導電性材料の層を有しな
い従来の負極板、又は導電性材料の層を有する本発明の
負極板は、ロ−ルプレス機でプレス（80℃〜120℃に加
熱したロールを使用、0.2〜0.5kgf／cmの圧力でプレ
ス）し、負極活物質層の密度が約0.8g/cm3になるまで圧
縮した。その後、幅が55mm、長さが500mmの短冊状に切
断して負極を作製した。The above-mentioned conventional negative electrode plate having no conductive material layer on its surface or the negative electrode plate of the present invention having a conductive material layer is pressed by a roll press (heated to 80 to 120 ° C.). The pressed roll was pressed at a pressure of 0.2 to 0.5 kgf / cm) and compressed until the density of the negative electrode active material layer became about 0.8 g / cm 3 . Thereafter, the resultant was cut into a strip having a width of 55 mm and a length of 500 mm to produce a negative electrode.
【００１９】３．電解液の作製 本発明では、非水溶媒に電解質を溶解させた非水電解液
を用いた。本発明で用いた非水電解液はエチレンカーボ
ネートとジメチルカーボネートを体積比で１：２に混合
した混合溶媒に、電解質としてLiPF6を1mol/l溶解させ
たものである。3. Preparation of Electrolyte Solution In the present invention, a non-aqueous electrolyte obtained by dissolving an electrolyte in a non-aqueous solvent was used. The non-aqueous electrolyte used in the present invention is obtained by dissolving 1 mol / l of LiPF 6 as an electrolyte in a mixed solvent in which ethylene carbonate and dimethyl carbonate are mixed at a volume ratio of 1: 2.
【００２０】前記した非水溶媒としては、プロピレンカ
ーボネイト、ブチレンカーボネイト、γ―ブチロラクト
ン、アセトニトリル、スルホラン、１，２−ヂメトキシ
エタン、１，３−ヂメトキシプロパン、ヂメチルエーテ
ル、テトラヒドロプラン、２−メチルテトラヒドロプラ
ン、炭酸ヂメチル、炭酸ジエチル、及びエチルメチルカ
ーボネイトなどが使用できる。Examples of the non-aqueous solvent include propylene carbonate, butylene carbonate, γ-butyrolactone, acetonitrile, sulfolane, 1,2-dimethoxyethane, 1,3-dimethoxypropane, dimethyl ether, tetrahydroplan, Methyltetrahydroplan, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate and the like can be used.
【００２１】また、前記電解質としては、過塩素酸リチ
ウム（LiClO4）、ホウフッ化リチウム（LiBF4）、六フ
ッ化ヒ素リチウム（LiAsF6）、トリフルオロメタンスル
ホン酸リチウム（LiCF3SO3）などが使用できる。The electrolyte includes lithium perchlorate (LiClO 4 ), lithium borofluoride (LiBF 4 ), lithium arsenic hexafluoride (LiAsF 6 ), lithium trifluoromethanesulfonate (LiCF 3 SO 3 ), and the like. Can be used.
【００２２】４．電池の作製 得られた正極板、負極板にタブ端子を超音波溶接法で取
り付けた後、帯状のセパレータ5を介してこれらを捲回
して捲回物を作製し、該捲回物を電池缶6に挿入する。
セパレータ5は、厚さが25μm、幅が58mm、長さが550mm
の微多孔性のポリエチレン製フィルムである。そして負
極集電体3に予め溶接しておいた負極タブ端子（図な
し）を、ニッケルメッキした電池缶6に溶接する。そし
て、正極タブ端子8を正極キャップ7に抵抗溶接する。次
に、前記した電解液を、電池缶6内に4ml注入する。正極
キャップ7を電池缶の上部に配置させ、絶縁性のガスケ
ット9を介して電池缶6の上部をかしめて密閉し、高さ65
mm、直径18mmの円筒形リチウムイオン二次電池を作製し
た。ここで、正極キャップ7内には、電池内部の圧力上
昇に応じて作動する電流遮断機構（圧力スイッチ）と、
前記電流遮断機構よりも高い圧力で作動する安全弁機構
が組み込まれている。本実施例では、作動圧が9kgf/cm2
の電流遮断機構と、作動圧が20kgf/cm2の安全弁機構を
用いた。4. Production of Battery After tab terminals were attached to the obtained positive electrode plate and negative electrode plate by an ultrasonic welding method, these were wound through a band-shaped separator 5 to produce a wound product, and the wound product was used as a battery can. Insert into 6.
Separator 5 has a thickness of 25 μm, a width of 58 mm, and a length of 550 mm
Is a microporous polyethylene film. Then, the negative electrode tab terminal (not shown) welded to the negative electrode current collector 3 in advance is welded to the nickel-plated battery can 6. Then, the positive electrode tab terminal 8 is resistance-welded to the positive electrode cap 7. Next, 4 ml of the above-described electrolytic solution is injected into the battery can 6. Place the positive electrode cap 7 on the upper part of the battery can, caulk the upper part of the battery can 6 through the insulating gasket 9 and seal it,
A cylindrical lithium ion secondary battery having a diameter of 18 mm and a diameter of 18 mm was produced. Here, in the positive electrode cap 7, a current cutoff mechanism (pressure switch) that operates in response to a pressure increase inside the battery,
A safety valve mechanism that operates at a higher pressure than the current interruption mechanism is incorporated. In this embodiment, the operating pressure is 9 kgf / cm 2
And a safety valve mechanism with an operating pressure of 20 kgf / cm 2 .
【００２３】５．充放電サイクル寿命試験 作製した有機電解液二次電池は、下記の条件で充放電サ
イクル試験をした。そして、初期の放電容量と500サイ
クル後の放電容量を比較した。5. Charge / discharge cycle life test The prepared organic electrolyte secondary battery was subjected to a charge / discharge cycle test under the following conditions. Then, the initial discharge capacity and the discharge capacity after 500 cycles were compared.
【００２４】充電条件：4.2V（定電圧充電）、500mA
（制限電流）、3h、50℃ 放電条件：300mA（定電流放電）、放電終止電圧2.6V、5
0℃ 充電、放電の間に、休止時間を10分間設けた。Charge condition: 4.2V (constant voltage charge), 500mA
(Limit current), 3h, 50 ° C Discharge condition: 300mA (constant current discharge), Discharge end voltage 2.6V, 5
A pause time of 10 minutes was provided between charging and discharging at 0 ° C.
【００２５】[0025]
【実施例】（比較例１)上記した表面に導電性材料の層
を有しない従来の正極板と、表面に導電性材料の層を有
しない従来の負極板とを用いて非水電解液二次電池を作
製した。その他の非水電解液二次電池の作製条件や充放
電試験条件等は上記したものである。(Comparative Example 1) A non-aqueous electrolyte solution was prepared by using a conventional positive electrode plate having no conductive material layer on its surface and a conventional negative electrode plate having no conductive material layer on its surface. A secondary battery was manufactured. The other conditions for producing the non-aqueous electrolyte secondary battery and the conditions for the charge / discharge test are as described above.
【００２６】（実施例１）正極活物質層の表面に、炭素
粉末を用いて導電性材料の層を形成した。なお、炭素粉
末として、繊維状炭素である気相成長炭素材を用いた。
この導電性材料の層を有する正極板と、導電性材料の層
を有しない従来の負極板とを用いて非水電解液二次電池
を作製した。その他の非水電解液二次電池の作製条件や
充放電試験条件等は上記したものである。Example 1 A layer of a conductive material was formed on the surface of a positive electrode active material layer using carbon powder. Note that a vapor-grown carbon material that was fibrous carbon was used as the carbon powder.
A non-aqueous electrolyte secondary battery was manufactured using the positive electrode plate having the conductive material layer and the conventional negative electrode plate having no conductive material layer. The other conditions for producing the non-aqueous electrolyte secondary battery and the conditions for the charge / discharge test are as described above.
【００２７】（実施例２）正極活物質層の表面に、銀粉
を用いて導電性材料の層を形成した。この正極板と、導
電性材料の層を有しない従来の負極板とを用いて非水電
解液二次電池を作製した。その他の非水電解液二次電池
の作製条件や充放電試験条件等は上記したものである。Example 2 A conductive material layer was formed on the surface of the positive electrode active material layer using silver powder. A non-aqueous electrolyte secondary battery was fabricated using this positive electrode plate and a conventional negative electrode plate having no conductive material layer. The other conditions for producing the non-aqueous electrolyte secondary battery and the conditions for the charge / discharge test are as described above.
【００２８】（実施例３）正極活物質層の表面に、導電
性セラミック繊維を用いて導電性材料の層を形成した。
なお、導電性セラミック繊維は、セラミック繊維の１種
類であるチタン酸カリウムウィスカの表面をグラファイ
トで被覆したものである。この導電性材料の層を有する
正極板と、導電性材料の層を有しない従来の負極板とを
用いて非水電解液二次電池を作製した。その他の非水電
解液二次電池の作製条件や充放電試験条件等は上記した
ものである。Example 3 A conductive material layer was formed on the surface of the positive electrode active material layer using conductive ceramic fibers.
The conductive ceramic fiber is obtained by coating the surface of a potassium titanate whisker, which is one type of ceramic fiber, with graphite. A non-aqueous electrolyte secondary battery was manufactured using the positive electrode plate having the conductive material layer and the conventional negative electrode plate having no conductive material layer. The other conditions for producing the non-aqueous electrolyte secondary battery and the conditions for the charge / discharge test are as described above.
【００２９】作製した非水電解液二次電池について、初
期の放電容量及び500サイクル試験後の放電容量を表１
に示す。表１に示されるように、本発明を用いることに
よりサイクル寿命特性が大幅に向上している。この理由
は、本発明を用いることにより正極表面の電極反応が均
一になったためと考えられる。Table 1 shows the initial discharge capacity and the discharge capacity after the 500 cycle test of the produced non-aqueous electrolyte secondary battery.
Shown in As shown in Table 1, the use of the present invention significantly improved the cycle life characteristics. The reason is considered to be that the use of the present invention made the electrode reaction on the positive electrode surface uniform.
【００３０】[0030]
【表１】 [Table 1]
【００３１】（実施例４）負極活物質層の表面に、前記
した気相成長炭素材を用いて導電性材料の層を形成し
た。この負極板と、導電性材料の層を有しない従来の正
極板とを用いて非水電解液二次電池を作製した。その他
の非水電解液二次電池の作製条件や充放電試験条件等は
上記したものである。(Example 4) A layer of a conductive material was formed on the surface of the negative electrode active material layer using the above-described vapor-grown carbon material. A non-aqueous electrolyte secondary battery was manufactured using this negative electrode plate and a conventional positive electrode plate having no conductive material layer. The other conditions for producing the non-aqueous electrolyte secondary battery and the conditions for the charge / discharge test are as described above.
【００３２】（実施例５）負極活物質層の表面に、銀粉
を用いて導電性材料の層を形成した。この負極板と、導
電性材料の層を有しない従来の正極板とを用いて非水電
解液二次電池を作製した。その他の非水電解液二次電池
の作製条件や充放電試験条件等は上記したものである。Example 5 A conductive material layer was formed on the surface of a negative electrode active material layer using silver powder. A non-aqueous electrolyte secondary battery was manufactured using this negative electrode plate and a conventional positive electrode plate having no conductive material layer. The other conditions for producing the non-aqueous electrolyte secondary battery and the conditions for the charge / discharge test are as described above.
【００３３】（実施例６）負極活物質層の表面に、上記
した導電性セラミック繊維を用いて導電性材料の層を形
成した。この負極板と、導電性材料の層を有しない従来
の正極板とを用いて非水電解液二次電池を作製した。そ
の他の非水電解液二次電池の作製条件や充放電試験条件
等は上記したものである。Example 6 A conductive material layer was formed on the surface of the negative electrode active material layer by using the above-described conductive ceramic fiber. A non-aqueous electrolyte secondary battery was manufactured using this negative electrode plate and a conventional positive electrode plate having no conductive material layer. The other conditions for producing the non-aqueous electrolyte secondary battery and the conditions for the charge / discharge test are as described above.
【００３４】作製した非水電解液二次電池について、初
期の放電容量及び500サイクル試験後の放電容量を表２
に示す。表２に示されるように、本発明を用いることに
よりサイクル寿命特性が大幅に向上している。この理由
は、本発明を用いることにより負極表面の電極反応が均
一になったためと考えられる。Table 2 shows the initial discharge capacity and the discharge capacity after the 500 cycle test of the produced non-aqueous electrolyte secondary battery.
Shown in As shown in Table 2, the use of the present invention significantly improved the cycle life characteristics. This is considered to be because the electrode reaction on the negative electrode surface became uniform by using the present invention.
【００３５】[0035]
【表２】 [Table 2]
【００３６】（実施例７）正極活物質層及び負極活物質
層の表面に、前記した気相成長炭素材を用いて導電性材
料の層を形成した。この正極板及び負極板を用いて非水
電解液二次電池を作製した。その他の非水電解液二次電
池の作製条件や充放電試験条件等は上記したものであ
る。Example 7 A layer of a conductive material was formed on the surfaces of the positive electrode active material layer and the negative electrode active material layer using the above-described vapor-grown carbon material. A non-aqueous electrolyte secondary battery was manufactured using the positive electrode plate and the negative electrode plate. The other conditions for producing the non-aqueous electrolyte secondary battery and the conditions for the charge / discharge test are as described above.
【００３７】（実施例８）正極活物質層及び負極活物質
層の表面に、銀粉を用いて導電性材料の層を形成した。
この正極板及び負極板を用いて非水電解液二次電池を作
製した。その他の非水電解液二次電池の作製条件や充放
電試験条件等は上記したものである。Example 8 A conductive material layer was formed on the surfaces of the positive electrode active material layer and the negative electrode active material layer using silver powder.
A non-aqueous electrolyte secondary battery was manufactured using the positive electrode plate and the negative electrode plate. The other conditions for producing the non-aqueous electrolyte secondary battery and the conditions for the charge / discharge test are as described above.
【００３８】（実施例９）正極活物質層及び負極活物質
層の表面に、上記した導電性セラミック繊維を用いて導
電性材料の層を形成した。この正極板及び負極板を用い
て非水電解液二次電池を作製した。その他の非水電解液
二次電池の作製条件や充放電試験条件等は上記したもの
である。Example 9 A layer of a conductive material was formed on the surfaces of the positive electrode active material layer and the negative electrode active material layer using the conductive ceramic fibers described above. A non-aqueous electrolyte secondary battery was manufactured using the positive electrode plate and the negative electrode plate. The other conditions for producing the non-aqueous electrolyte secondary battery and the conditions for the charge / discharge test are as described above.
【００３９】作製した非水電解液二次電池について、初
期の放電容量及び500サイクル試験後の放電容量を表３
に示す。表３に示されるように、本発明を用いることに
よりサイクル寿命特性が大幅に向上している。Table 3 shows the initial discharge capacity and the discharge capacity after the 500 cycle test of the manufactured non-aqueous electrolyte secondary battery.
Shown in As shown in Table 3, the cycle life characteristics are significantly improved by using the present invention.
【００４０】[0040]
【表３】 [Table 3]
【００４１】なお、炭素粉末としてグラファイトを用い
た場合や、金属粉末として酸化スズ、アンチモン、ニッ
ケル又はアルミニウムなどの粉末を用いた場合でも同様
の効果が得られた。Similar effects were obtained when graphite was used as the carbon powder or when tin powder, antimony, nickel or aluminum was used as the metal powder.
【００４２】また、セラミック繊維の１種類であるチタ
ン酸カリウムウィスカの代わりガラス繊維を用い、その
表面をグラファイトを被覆した導電性材料を用いた場合
でも同様の効果が得られた。また、チタン酸カリウムウ
ィスカやガラス繊維の表面を銀で被覆した導電性材料を
用いた場合でも同様の効果が得られた。Similar effects were obtained when glass fibers were used instead of potassium titanate whiskers, which is one type of ceramic fibers, and a conductive material whose surface was coated with graphite was used. Similar effects were obtained even when a conductive material in which the surface of a potassium titanate whisker or glass fiber was coated with silver was used.
【００４３】[0043]
【発明の効果】本発明は、放電、充電によりリチウムを
吸蔵、放出が可能なマンガン酸リチウムを活物質として
用いる非水電解液二次電池において、正極活物質層や負
極活物質層の表面に導電性材料の層を設けるものであ
る。本発明を用いることにより、サイクル寿命特性の向
上した非水電解液二次電池が得られる。The present invention relates to a non-aqueous electrolyte secondary battery using lithium manganate as an active material, which can occlude and release lithium by discharging and charging, in the surface of the positive electrode active material layer and the negative electrode active material layer. A layer of a conductive material is provided. By using the present invention, a nonaqueous electrolyte secondary battery having improved cycle life characteristics can be obtained.
【図１】本発明を実施した円筒形リチウムイオン二次電
池の断面図である。FIG. 1 is a sectional view of a cylindrical lithium ion secondary battery embodying the present invention.
１：正極集電体、２：正極活物質層、３：負極集電体、
４：負極活物質層、５：セパレータ、６：電池缶、７：
正極キャップ、８：正極タブ端子、９：ガスケット1: positive electrode current collector, 2: positive electrode active material layer, 3: negative electrode current collector,
4: negative electrode active material layer, 5: separator, 6: battery can, 7:
Positive electrode cap, 8: positive electrode tab terminal, 9: gasket
───────────────────────────────────────────────────── フロントページの続き (72)発明者 井口 智博 東京都中央区日本橋本町２丁目８番７号 新神戸電機株式会社内 Ｆターム(参考） 5H003 AA04 AA10 BA07 BB01 BB02 BB05 BB11 BB15 BC01 BC02 BC05 5H014 AA02 BB08 CC01 EE05 EE07 EE10 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tomohiro Iguchi 2-8-7 Nihonbashi Honcho, Chuo-ku, Tokyo F-term in Shin-Kobe Electric Co., Ltd. 5H003 AA04 AA10 BA07 BB01 BB02 BB05 BB11 BB15 BC01 BC02 BC05 5H014 AA02 BB08 CC01 EE05 EE07 EE10
Claims (6)
可能なマンガン酸リチウム、導電材及び結着剤を正極活
物質層に用い、放電、充電によりリチウムを放出、吸蔵
が可能な炭素材料及び結着剤を負極活物質層に用いた非
水電解液二次電池において、前記正極活物質層又は前記
負極活物質層の少なくとも一方の表面に、導電性材料の
層を設けることを特徴とする非水電解液二次電池。1. A carbon material capable of releasing and occluding lithium by discharging and charging lithium lithium manganate, a conductive material and a binder capable of occluding and releasing lithium by discharging and charging. In a nonaqueous electrolyte secondary battery using a binder for a negative electrode active material layer, a layer of a conductive material is provided on at least one surface of the positive electrode active material layer or the negative electrode active material layer. Non-aqueous electrolyte secondary battery.
ことを特徴とする請求項１記載の非水電解液二次電池。2. The non-aqueous electrolyte secondary battery according to claim 1, wherein carbon powder is used as said conductive material.
ファイトを用いることを特徴とする請求項２記載の非水
電解液二次電池。3. The non-aqueous electrolyte secondary battery according to claim 2, wherein fibrous carbon or graphite is used as said carbon powder.
ことを特徴とする請求項１記載の非水電解液二次電池。4. The non-aqueous electrolyte secondary battery according to claim 1, wherein a metal powder is used as said conductive material.
ン、ニッケル、アルミニウムのいずれかの粉末を含んで
いることを特徴とする請求項４記載の非水電解液二次電
池。5. The non-aqueous electrolyte secondary battery according to claim 4, wherein the metal powder contains any one of silver, tin oxide, antimony, nickel and aluminum.
繊維を用いることを特徴とする請求項１記載の非水電解
液二次電池。6. The non-aqueous electrolyte secondary battery according to claim 1, wherein a conductive ceramic fiber is used as the conductive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11140623A JP2000331686A (en) | 1999-05-20 | 1999-05-20 | Non-aqueous electrolyte secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11140623A JP2000331686A (en) | 1999-05-20 | 1999-05-20 | Non-aqueous electrolyte secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000331686A true JP2000331686A (en) | 2000-11-30 |
Family
ID=15273019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11140623A Abandoned JP2000331686A (en) | 1999-05-20 | 1999-05-20 | Non-aqueous electrolyte secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000331686A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001202960A (en) * | 2000-01-14 | 2001-07-27 | Sony Corp | Positive electrode material and secondary battery using the same |
| KR100432669B1 (en) * | 2001-12-17 | 2004-05-22 | 삼성에스디아이 주식회사 | Negative active material for rechargeable lithium batteries and preparing for same |
| JP2013041705A (en) * | 2011-08-12 | 2013-02-28 | Mitsubishi Materials Corp | Electrode for nonaqueous electrolyte secondary battery and manufacturing method of the same |
| WO2013125305A1 (en) * | 2012-02-23 | 2013-08-29 | トヨタ自動車株式会社 | Sealed nonaqueous electrolyte secondary battery |
| US8623554B2 (en) * | 2002-11-26 | 2014-01-07 | Show A Denko K.K. | Electrode material, and production method and use thereof |
| CN105375063A (en) * | 2015-12-16 | 2016-03-02 | 中山市应用化学研究所 | Novel lithium battery core unit and manufacturing method thereof |
| EP2819219B1 (en) * | 2012-02-23 | 2016-08-03 | Nissan Motor Co., Ltd | Bipolar electrode and bipolar lithium-ion secondary battery using same |
| CN109346333A (en) * | 2018-10-25 | 2019-02-15 | 桂林理工大学 | A kind of preparation method of carbon/glass fiber fabric supercapacitor electrode |
| CN116031409A (en) * | 2022-12-27 | 2023-04-28 | 蜂巢能源科技(无锡)有限公司 | A kind of electroconductivity enhanced secondary battery negative electrode slurry and its preparation method and application |
| JP2023536771A (en) * | 2021-07-14 | 2023-08-30 | 寧徳時代新能源科技股▲分▼有限公司 | Battery assembly, processing method and apparatus thereof, battery cell, battery, and power consumption device |
-
1999
- 1999-05-20 JP JP11140623A patent/JP2000331686A/en not_active Abandoned
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001202960A (en) * | 2000-01-14 | 2001-07-27 | Sony Corp | Positive electrode material and secondary battery using the same |
| KR100432669B1 (en) * | 2001-12-17 | 2004-05-22 | 삼성에스디아이 주식회사 | Negative active material for rechargeable lithium batteries and preparing for same |
| US8623554B2 (en) * | 2002-11-26 | 2014-01-07 | Show A Denko K.K. | Electrode material, and production method and use thereof |
| JP2013041705A (en) * | 2011-08-12 | 2013-02-28 | Mitsubishi Materials Corp | Electrode for nonaqueous electrolyte secondary battery and manufacturing method of the same |
| US9972860B2 (en) | 2012-02-23 | 2018-05-15 | Nissan Motor Co., Ltd. | Bipolar electrode and bipolar lithium-ion secondary battery using same |
| WO2013125305A1 (en) * | 2012-02-23 | 2013-08-29 | トヨタ自動車株式会社 | Sealed nonaqueous electrolyte secondary battery |
| CN104137306A (en) * | 2012-02-23 | 2014-11-05 | 丰田自动车株式会社 | Sealed nonaqueous electrolyte secondary battery |
| EP2819219B1 (en) * | 2012-02-23 | 2016-08-03 | Nissan Motor Co., Ltd | Bipolar electrode and bipolar lithium-ion secondary battery using same |
| CN105375063A (en) * | 2015-12-16 | 2016-03-02 | 中山市应用化学研究所 | Novel lithium battery core unit and manufacturing method thereof |
| CN109346333A (en) * | 2018-10-25 | 2019-02-15 | 桂林理工大学 | A kind of preparation method of carbon/glass fiber fabric supercapacitor electrode |
| JP2023536771A (en) * | 2021-07-14 | 2023-08-30 | 寧徳時代新能源科技股▲分▼有限公司 | Battery assembly, processing method and apparatus thereof, battery cell, battery, and power consumption device |
| JP7514312B2 (en) | 2021-07-14 | 2024-07-10 | 寧徳時代新能源科技股▲分▼有限公司 | Battery assembly, processing method and apparatus thereof, battery cell, battery, and power consuming device |
| CN116031409A (en) * | 2022-12-27 | 2023-04-28 | 蜂巢能源科技(无锡)有限公司 | A kind of electroconductivity enhanced secondary battery negative electrode slurry and its preparation method and application |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A762 | Written abandonment of application |
Free format text: JAPANESE INTERMEDIATE CODE: A762 Effective date: 20040107 |