JPH08138734A - Organic electrolyte secondary battery - Google Patents
Organic electrolyte secondary batteryInfo
- Publication number
- JPH08138734A JPH08138734A JP6278031A JP27803194A JPH08138734A JP H08138734 A JPH08138734 A JP H08138734A JP 6278031 A JP6278031 A JP 6278031A JP 27803194 A JP27803194 A JP 27803194A JP H08138734 A JPH08138734 A JP H08138734A
- Authority
- JP
- Japan
- Prior art keywords
- positive electrode
- secondary battery
- lithium
- active material
- electrolyte secondary
- 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.)
- Pending
Links
- 239000005486 organic electrolyte Substances 0.000 title claims abstract description 18
- 239000007774 positive electrode material Substances 0.000 claims abstract description 15
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000002904 solvent Substances 0.000 claims abstract description 7
- JWUJQDFVADABEY-UHFFFAOYSA-N 2-methyltetrahydrofuran Chemical compound CC1CCCO1 JWUJQDFVADABEY-UHFFFAOYSA-N 0.000 claims abstract description 4
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims abstract description 4
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 claims abstract description 4
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000008151 electrolyte solution Substances 0.000 claims description 15
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 10
- 229910052744 lithium Inorganic materials 0.000 claims description 10
- CKFRRHLHAJZIIN-UHFFFAOYSA-N cobalt lithium Chemical compound [Li].[Co] CKFRRHLHAJZIIN-UHFFFAOYSA-N 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 8
- PAWLCYTYCZYSRO-UHFFFAOYSA-N [Li].P(F)(F)F Chemical compound [Li].P(F)(F)F PAWLCYTYCZYSRO-UHFFFAOYSA-N 0.000 claims description 3
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 claims description 3
- 229910001486 lithium perchlorate Inorganic materials 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract description 5
- 239000003792 electrolyte Substances 0.000 abstract 3
- XWOPAUAIBOHRFW-UHFFFAOYSA-M [Li+].[F-].F.F.F.P Chemical compound [Li+].[F-].F.F.F.P XWOPAUAIBOHRFW-UHFFFAOYSA-M 0.000 abstract 1
- QGFUJXDXUWUFJG-UHFFFAOYSA-N lithium;perchloric acid Chemical compound [Li].OCl(=O)(=O)=O QGFUJXDXUWUFJG-UHFFFAOYSA-N 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000011149 active material Substances 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 8
- 230000007423 decrease Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 3
- 229910000428 cobalt oxide Inorganic materials 0.000 description 3
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 3
- 239000002482 conductive additive Substances 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 2
- 229910052808 lithium carbonate Inorganic materials 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- KXJGSNRAQWDDJT-UHFFFAOYSA-N 1-acetyl-5-bromo-2h-indol-3-one Chemical compound BrC1=CC=C2N(C(=O)C)CC(=O)C2=C1 KXJGSNRAQWDDJT-UHFFFAOYSA-N 0.000 description 1
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910013733 LiCo Inorganic materials 0.000 description 1
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 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)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、各種電子機器の電源と
して使用される充放電可能な有機電解液２次電池に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rechargeable organic electrolyte secondary battery used as a power source for various electronic devices.
【０００２】[0002]
【従来の技術】従来、リチウムコバルト複合酸化物を正
極活物質とした正極と、電解液と、金属リチウムを用い
た負極とを備える有機電解液２次電池において、起電反
応のもとになる活物質の導電性を高めるため、及び活物
質からなる電極シ−トの強度を上げるために、特開昭６
３−１２１２５８号公報や特開平４−２４９０７３号公
報には次のような電極が開示されている。2. Description of the Related Art Conventionally, in an organic electrolyte secondary battery provided with a positive electrode using a lithium cobalt composite oxide as a positive electrode active material, an electrolytic solution, and a negative electrode using metallic lithium, this is a source of an electromotive reaction. In order to increase the conductivity of the active material and to increase the strength of the electrode sheet made of the active material, Japanese Patent Application Laid-Open No. Sho 6-96
The following electrodes are disclosed in JP-A-3-121258 and JP-A-4-249073.
【０００３】すなわち、これらの電極は、活物質と、導
電助剤であるカーボン粉末や導電金属酸化物と、バイン
ダー成分であるアクリロニトリル、メタクリニトリル、
フッ化ビニル、フッ化ビニリデン、クロロプレン、及び
塩化ビニリデン等の重合体または共重合体や、ニトロセ
ルロース、シアノエチルセルロース、及び多硫化ゴム等
を用い、これらの混合物を集電体に塗布、または圧着し
て形成していた。That is, these electrodes are composed of an active material, carbon powder or a conductive metal oxide as a conductive aid, and acrylonitrile or methacrylonitrile as a binder component.
Polymers or copolymers such as vinyl fluoride, vinylidene fluoride, chloroprene, and vinylidene chloride, nitrocellulose, cyanoethyl cellulose, and polysulfide rubber are used, and a mixture of these is applied or pressure-bonded to the current collector. Was formed.
【０００４】しかし、これらの電極は、導電助剤やバイ
ンダ−成分の含有量が増加するのに従い、電極中の活物
質の含有量が低下し、有機電解液２次電池の重量や容積
に対する容量が低下する傾向にあった。However, in these electrodes, the content of the active material in the electrode decreases as the content of the conductive auxiliary agent and the binder component increases, and the capacity of the organic electrolyte secondary battery with respect to the weight and volume thereof increases. Tended to decline.
【０００５】[0005]
【発明が解決しようとする課題】このような問題を解決
するために、導電助剤及びバインダーを含まない活物質
を電極として用いることが考えられる。しかしながら、
重量効率や容積効率を確保するために、導電助剤やバイ
ンダーを含有しない電極を設けた場合には、導電助剤や
バインダーを含有した電極と比較して、電解液と活物質
の反応面積が一定範囲を超えて大きくなりすぎ、充放電
反応が劣化して容量低下に繋がり、問題となっていた。In order to solve such a problem, it is considered to use an active material containing no conductive additive and a binder as an electrode. However,
In order to ensure weight efficiency and volume efficiency, when an electrode containing no conductive additive or binder is provided, the reaction area between the electrolytic solution and the active material is smaller than that of an electrode containing a conductive auxiliary or binder. If it exceeds a certain range and becomes too large, the charge / discharge reaction deteriorates, leading to a decrease in capacity, which is a problem.
【０００６】そこで本発明の目的は、リチウムコバルト
複合酸化物を正極活物質とした正極と、電解液と、金属
リチウムを用いた負極とを備える有機電解液２次電池に
おいて、充放電に伴う容量低下を防ぐことができる有機
電解液２次電池を提供することにある。Therefore, an object of the present invention is to provide an organic electrolyte secondary battery including a positive electrode using a lithium-cobalt composite oxide as a positive electrode active material, an electrolytic solution, and a negative electrode using metallic lithium. An object of the present invention is to provide an organic electrolyte secondary battery capable of preventing a decrease.
【０００７】[0007]
【課題を解決するための手段】本発明は、リチウムコバ
ルト複合酸化物を正極活物質とした正極と、電解液と、
金属リチウムを用いた負極とを備え、前記電解液とし
て、エチレンカーボネイト、プロピレンカーボネイト、
テトラヒドロフラン、及び２−メチルテトラヒドロフラ
ンのうち少なくとも１種類を用いた溶媒と、過塩素酸リ
チウムまたはリンフッ化リチウムのいずれかを用いた溶
質とからなることを特徴とするものである。The present invention is directed to a positive electrode using a lithium cobalt composite oxide as a positive electrode active material, an electrolytic solution, and
And a negative electrode using metallic lithium, as the electrolytic solution, ethylene carbonate, propylene carbonate,
It is characterized by comprising a solvent using at least one of tetrahydrofuran and 2-methyltetrahydrofuran, and a solute using either lithium perchlorate or lithium phosphorus fluoride.
【０００８】[0008]
【作用】本発明によれば、リチウムコバルト複合酸化物
を正極活物質とした正極と、電解液と、金属リチウムを
用いた負極とを備え、前記電解液として、エチレンカー
ボネイト、プロピレンカーボネイト、テトラヒドロフラ
ン、及び２−メチルテトラヒドロフランのうち少なくと
も１種類の溶媒を用い、溶質に過塩素酸リチウムまたは
リンフッ化リチウムのいずれかを用いることにより、活
物質との反応において安定した電解液の選択が可能とな
り、充放電に伴う電解液の分解による容量低下を抑える
ことができる。According to the present invention, a positive electrode using a lithium cobalt composite oxide as a positive electrode active material, an electrolytic solution, and a negative electrode using metallic lithium are provided, and the electrolytic solution is ethylene carbonate, propylene carbonate, tetrahydrofuran, By using at least one solvent of 2-methyltetrahydrofuran and using either lithium perchlorate or lithium phosphorus fluoride as the solute, it becomes possible to select a stable electrolytic solution in the reaction with the active material, It is possible to suppress a decrease in capacity due to decomposition of the electrolytic solution due to discharge.
【０００９】[0009]
【実施例】以下、本発明の実施例につき、図面を参照し
て説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１０】図１は本実施例のコイン形有機電解液２次
電池の概略的な縦断面図である。このコイン形有機電解
液２次電池１は、内周にパッキング２を装着した正極缶
３に負極蓋４が取り付けられて封口密閉されており、内
部は正極と負極を隔てるセパレータ５を挟んで下部に正
極活物質６と正極集電体７、また上部には負極として金
属リチウム８が設けられている。FIG. 1 is a schematic vertical sectional view of a coin type organic electrolyte secondary battery of this embodiment. In this coin-shaped organic electrolyte secondary battery 1, a negative electrode lid 4 is attached to a positive electrode can 3 having a packing 2 mounted on the inner periphery thereof and is hermetically sealed. A positive electrode active material 6 and a positive electrode current collector 7 are provided on the upper part, and metallic lithium 8 is provided on the upper part as a negative electrode.
【００１１】始めに、正極活物質であるリチウムコバル
ト複合酸化物を次のように合成した。炭酸リチウム０．
５モルと酸化コバルト０．５モルを混合して、空気中で
６００℃の温度で１０時間仮焼し、ボールミルで粉砕し
た。その後、空気中で１０００℃の温度で２０時間焼成
して塊状のＬｉＣｏＯ2 を得た。そして、このＬｉＣｏ
Ｏ2 をさらにボールミルで粉砕し、正極活物質粉体を得
た。First, a lithium cobalt composite oxide, which is a positive electrode active material, was synthesized as follows. Lithium carbonate 0.
5 mol of cobalt oxide and 0.5 mol of cobalt oxide were mixed, calcined in air at a temperature of 600 ° C. for 10 hours, and pulverized with a ball mill. Then, it was baked in air at a temperature of 1000 ° C. for 20 hours to obtain a lump of LiCoO 2 . And this LiCo
O 2 was further pulverized with a ball mill to obtain a positive electrode active material powder.
【００１２】次に、得られたＬｉＣｏＯ2 を用いて正極
の作製を行った。まず、ＬｉＣｏＯ2 １重量部に対し、
ポリビニール系バインダーを有機溶媒に分散させた溶液
３重量部を加えたものを、ステンレスホイール上に塗布
し、空気中で４００℃の温度で１０時間熱処理を行い、
バインダー成分を分解除去して活物質を塗布した正極部
材を得た。Next, a positive electrode was produced using the obtained LiCoO 2 . First, with respect to 1 part by weight of LiCoO 2 ,
A solution in which 3 parts by weight of a solution in which a polyvinyl binder is dispersed in an organic solvent is added is coated on a stainless wheel and heat-treated at a temperature of 400 ° C. for 10 hours in air,
The binder component was decomposed and removed to obtain a positive electrode member coated with the active material.
【００１３】次に、コイン形有機電解液２次電池１の組
み立てを次のように行った。Next, the coin type organic electrolyte secondary battery 1 was assembled as follows.
【００１４】まず、作製した正極部材を円形に打ち抜
き、正極となる正極活物質６及び正極集電体７を作製し
た。そして、内周にあらかじめパッキング２を装着した
ステンレス製の正極缶３の底部にこの正極活物質６及び
正極集電体７を挿入し、その上部に円形に打ち抜いた厚
さ２５μｍのポリプロピレン製のセパレータ５を重ね、
さらにその上部に、負極として円形に打ち抜いた金属リ
チウム８を重ねた。First, the produced positive electrode member was punched out in a circular shape to produce a positive electrode active material 6 and a positive electrode current collector 7 to be a positive electrode. Then, the positive electrode active material 6 and the positive electrode current collector 7 are inserted into the bottom of a stainless steel positive electrode can 3 having the packing 2 attached in advance on the inner periphery thereof, and a 25 μm-thick polypropylene separator punched out in a circular shape on the upper part thereof. Stack 5
Further, metal lithium 8 punched out in a circular shape as a negative electrode was stacked on the upper part thereof.
【００１５】そして、下記表１に示す溶媒と溶質の組み
合わせによる４種類の電解液をそれぞれ適当量滴下し
た。ここで、比較例として示したものは、特開平４−２
４９０７３号公報で用いられた溶媒と溶質の組み合わせ
である。Then, an appropriate amount of each of the four kinds of electrolytic solutions shown in Table 1 below, which consisted of the combination of the solvent and the solute, was dropped. Here, the one shown as a comparative example is disclosed in Japanese Patent Laid-Open No. 4-2.
It is a combination of a solvent and a solute used in Japanese Patent No. 49073.
【００１６】[0016]
【表１】 [Table 1]
【００１７】そして、負極側の集電体であるステンレス
の負極蓋４を装着した後、正極缶３、パッキング２、及
び負極蓋４の各周辺部が重なる箇所で、正極缶３をかし
めて封口密閉し、４個のコイン型有機電解液２次電池を
作製した。なお、これら電池の組み立て作業はすべてＡ
ｒガス雰囲気中で行った。After mounting the negative electrode cover 4 made of stainless steel, which is a current collector on the negative electrode side, the positive electrode can 3 is caulked at the position where the peripheral parts of the positive electrode can 3, the packing 2 and the negative electrode cover 4 overlap with each other to seal the positive electrode can 3. After sealing, four coin-type organic electrolyte secondary batteries were produced. In addition, all the assembly work of these batteries is A
It was conducted in an r gas atmosphere.
【００１８】以上のように作製した４種類のコイン形有
機電解液２次電池の試料を以下の方法で評価した。The four types of coin-type organic electrolyte secondary battery samples prepared as described above were evaluated by the following methods.
【００１９】充放電は電流密度０．５ｍＡ／ｃｍ2 で電
圧上限が４．４Ｖ、電圧下限が３．２Ｖの間で行い、温
度は２６℃で試験した。Charging / discharging was performed at a current density of 0.5 mA / cm 2 with an upper voltage limit of 4.4 V and a lower voltage limit of 3.2 V, and the test was conducted at a temperature of 26 ° C.
【００２０】図２は本発明の実施例において、作製した
コイン型有機電解液２次電池の充放電を２０サイクル繰
り返したときの電池の容量の低下とサイクルの関係を示
したグラフである。縦軸は正極活物質の重量から換算し
た理論容量に対する電池容量の割合を示し、また横軸は
充放電サイクル数を示している。FIG. 2 is a graph showing the relationship between the decrease in battery capacity and the cycle when 20 cycles of charging / discharging of the coin-type organic electrolyte secondary battery prepared in the example of the present invention were repeated. The vertical axis represents the ratio of the battery capacity to the theoretical capacity converted from the weight of the positive electrode active material, and the horizontal axis represents the number of charge / discharge cycles.
【００２１】これにより明らかなように、比較例では２
０サイクル目の電池容量が初期容量と比較して約６０％
低下しているのに対して、本実施例の試料番号１ないし
試料番号３では容量の変化がほとんど見られないだけで
なく、理論容量に対する電池容量の割合も３０〜４０％
と良好である。As is clear from this, in the comparative example, 2
Battery capacity at 0th cycle is about 60% compared to initial capacity
In contrast to the decrease, the sample Nos. 1 to 3 of this example show almost no change in the capacity, and the ratio of the battery capacity to the theoretical capacity is 30 to 40%.
And good.
【００２２】なお、本発明で正極活物質として用いるリ
チウムコバルト複合酸化物は、例えば、リチウムの炭酸
物とコバルトの酸化物とを適当に混合し、６００〜１０
００℃の温度で焼成して得られるが、リチウムは前記実
施例のように炭酸塩に限定されるものではなく、酸化
物、水酸化物を出発原料として用いることも可能であ
る。また、本実施例のコイン形有機電解液２次電池１の
セパレータ５の部材には、リチウムイオンの透過が可能
なものであればよいが、特にポリプロピレン膜やグラス
ウールなどが好ましい。一方、負極に用いる部材は、リ
チウムイオンがドープ、脱ドープできるものであればよ
い。The lithium-cobalt composite oxide used as the positive electrode active material in the present invention is, for example, 600 to 10 obtained by appropriately mixing a lithium carbonate and a cobalt oxide.
It is obtained by firing at a temperature of 00 ° C., but lithium is not limited to carbonate as in the above examples, and oxides and hydroxides can be used as starting materials. Further, the member of the separator 5 of the coin-type organic electrolyte secondary battery 1 of the present embodiment may be any member that is permeable to lithium ions, but a polypropylene film or glass wool is particularly preferable. On the other hand, the member used for the negative electrode may be one that can be doped with lithium ions and dedoped.
【００２３】[0023]
【発明の効果】以上のように、導電助剤やバインダーを
含有していないリチウムコバルト複合酸化物を正極活物
質とした正極と、電解液と、金属リチウムを用いた負極
とを備える有機電解液２次電池について、前記電解液の
溶媒と溶質を組み合わせることにより、充放電を繰り返
しても容量低下が少なく、充放電が安定しているという
特性を有することができる。As described above, the organic electrolytic solution including the positive electrode using the lithium cobalt composite oxide containing no conductive additive or binder as the positive electrode active material, the electrolytic solution, and the negative electrode using metallic lithium. By combining the solvent and the solute of the electrolytic solution in the secondary battery, it is possible to have characteristics that the capacity does not decrease even when charging and discharging are repeated and the charging and discharging are stable.
【図１】実施例のコイン形有機電解液２次電池の縦断面
図である。FIG. 1 is a vertical cross-sectional view of a coin-type organic electrolyte secondary battery of an example.
【図２】コイン形有機電解液２次電池の充放電サイクル
数と理論容量に対する電池容量の割合の関係を示すグラ
フである。FIG. 2 is a graph showing the relationship between the number of charge / discharge cycles of a coin-type organic electrolyte secondary battery and the ratio of the battery capacity to the theoretical capacity.
１ コイン形有機電解液２次電池 ２ パッキング ３ 正極缶 ４ 負極蓋 ５ セパレータ ６ 正極活物質 ７ 正極集電体 ８ 金属リチウム 1 coin type organic electrolyte secondary battery 2 packing 3 positive electrode can 4 negative electrode lid 5 separator 6 positive electrode active material 7 positive electrode current collector 8 metallic lithium
Claims (1)
質とした正極と、電解液と、金属リチウムを用いた負極
とを備え、前記電解液として、エチレンカーボネイト、
プロピレンカーボネイト、テトラヒドロフラン、及び２
−メチルテトラヒドロフランのうち少なくとも１種類を
用いた溶媒と、過塩素酸リチウムまたはリンフッ化リチ
ウムのいずれかを用いた溶質とからなることを特徴とす
る有機電解液２次電池。1. A positive electrode using a lithium cobalt composite oxide as a positive electrode active material, an electrolytic solution, and a negative electrode using metallic lithium, wherein the electrolytic solution is ethylene carbonate,
Propylene carbonate, tetrahydrofuran, and 2
-An organic electrolyte secondary battery comprising a solvent using at least one of methyltetrahydrofuran and a solute using either lithium perchlorate or lithium phosphorus fluoride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6278031A JPH08138734A (en) | 1994-11-11 | 1994-11-11 | Organic electrolyte secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6278031A JPH08138734A (en) | 1994-11-11 | 1994-11-11 | Organic electrolyte secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08138734A true JPH08138734A (en) | 1996-05-31 |
Family
ID=17591692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6278031A Pending JPH08138734A (en) | 1994-11-11 | 1994-11-11 | Organic electrolyte secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08138734A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7381496B2 (en) | 2004-05-21 | 2008-06-03 | Tiax Llc | Lithium metal oxide materials and methods of synthesis and use |
-
1994
- 1994-11-11 JP JP6278031A patent/JPH08138734A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7381496B2 (en) | 2004-05-21 | 2008-06-03 | Tiax Llc | Lithium metal oxide materials and methods of synthesis and use |
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