WO2013001919A1 - 非水電解質二次電池 - Google Patents
非水電解質二次電池 Download PDFInfo
- Publication number
- WO2013001919A1 WO2013001919A1 PCT/JP2012/061976 JP2012061976W WO2013001919A1 WO 2013001919 A1 WO2013001919 A1 WO 2013001919A1 JP 2012061976 W JP2012061976 W JP 2012061976W WO 2013001919 A1 WO2013001919 A1 WO 2013001919A1
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- WIPO (PCT)
- Prior art keywords
- particle layer
- polyethylene glycol
- inorganic particle
- battery
- secondary battery
- Prior art date
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Images
Classifications
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- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
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- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a non-aqueous electrolyte secondary battery in which an inorganic particle layer is formed between a positive electrode or negative electrode and a separator.
- Lithium ion batteries that charge and discharge by moving lithium ions between positive and negative electrodes have high energy density and high capacity, and are therefore widely used as drive power sources for such mobile information terminals. .
- Patent Document 1 discloses a positive electrode for a non-aqueous electrolyte secondary battery that can suppress a minute short circuit between the positive electrode and the negative electrode and can improve storage characteristics at a high temperature, and a non-electrode using the same.
- a water electrolyte secondary battery has been proposed.
- Patent Document 1 describes that the storage characteristics at high temperature (60 ° C.) are improved by adding a glycol compound to the inorganic particle layer formed on the surface of the positive electrode.
- a glycol compound to the inorganic particle layer formed on the surface of the positive electrode.
- the positive electrode and the electrolytic solution react with each other, gas is generated, and the battery is not easily expanded. It aims at providing a nonaqueous electrolyte secondary battery.
- the present invention is a non-aqueous electrolyte secondary battery comprising a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, a non-aqueous electrolyte, and a separator provided between the positive electrode and the negative electrode.
- An inorganic particle layer is formed between the negative electrode and the separator, and a polymer having a polyethylene glycol group is contained in the inorganic particle layer, and the average molecular weight of the polymer having a polyethylene glycol group is 200 or more. It is characterized by that.
- the decomposition product of the electrolytic solution in which the polyethylene glycol group in the inorganic particle layer formed between the positive electrode and the separator or between the negative electrode and the separator is decomposed on the positive electrode surface is the negative electrode surface.
- the decomposition product Before reaching the value, the decomposition product is adsorbed, the decomposition product can be prevented from reaching the negative electrode surface, and gas generation can be suppressed.
- the average molecular weight of the polymer having a polyethylene glycol group is less than 200, the ability to adsorb decomposition products decreases, and the effect of suppressing the expansion of the battery tends to decrease.
- the average molecular weight of the polymer having a polyethylene glycol group contained in the inorganic particle layer is particularly preferably 1000 or more and 20000 or less.
- the inorganic particle layer in the present invention is preferably formed between the positive electrode and the separator. This is because the decomposition product can be adsorbed more efficiently by forming an inorganic particle layer on the surface of the positive electrode, which is a generation source of the decomposition product.
- an inorganic particle layer is formed on the positive electrode surface. This is because the inorganic particle layer formed on the positive electrode surface can prevent the inorganic particle layer from shrinking together with the separator even when heat is generated.
- the inorganic particles contained in the inorganic particle layer include rutile type titanium oxide (rutile type titania), aluminum oxide (alumina), zirconium oxide (zirconia), magnesium oxide (magnesia) and the like.
- the average particle diameter of the inorganic particles is preferably 1 ⁇ m or less, and more preferably in the range of 0.1 to 0.8 ⁇ m. Considering the dispersibility of the inorganic particles in the slurry, it is particularly preferable that the inorganic particles are surface-treated with aluminum, silicon, or titanium.
- the average particle size of the inorganic particles is preferably larger than the average pore size of the separator.
- the average pore diameter of the separator is smaller than the average particle diameter of the inorganic particles.
- the inorganic particles are particularly preferably aluminum oxide and rutile titanium oxide.
- the thickness of the inorganic particle layer formed on the positive electrode surface is preferably 4 ⁇ m or less, more preferably in the range of 0.5 to 4 ⁇ m, and still more preferably in the range of 0.5 to 2 ⁇ m. . If the thickness of the inorganic particle layer is too thin, the effect obtained by forming the inorganic particle layer may be insufficient. If the thickness of the inorganic particle layer is too thick, the load characteristics of the battery may be reduced or energy may be reduced. There is a risk that the density will decrease.
- polymers having a polyethylene glycol group used in the present invention include polyethylene glycols such as polyethylene glycol # 1000 and polyethylene glycol # 6000, polyethylene glycol monoalkyl ethers such as polyethylene glycol monomethyl ether, and polyethylene glycol.
- Polyethylene glycol monosuccinate such as monomethyl ether or polyethylene glycol acyl esters such as polyethylene glycol double-ended maleate (half-ester half carboxylic acid), ethylene glycol diglycidyl ether, glycerol triglycidyl ether
- a polyester having a glycidyl group such as sorbitol polyglycidyl ether Compounds obtained by reacting polyethylene glycols such as glycol # 400 or # 600 and the like.
- polymer having a polyethylene glycol group examples include a compound obtained by reacting a compound having an isocyanate group such as MDI or TDI with a compound polyethylene glycol such as polyethylene glycol # 400 or # 600, bisoxazoline or 1 And compounds obtained by reacting a polyethylene glycol such as polyethylene glycol # 400 or # 600 with a compound having an oxazoline group such as 1,3-benzobisoxazoline.
- polymer having a polyethylene glycol group examples include a compound obtained by reacting an acid anhydride such as butanetetracarboxylic acid anhydride or pyromellitic acid anhydride with polyethylene glycol as described above, polyethylene glycol monoallyl Polymers such as homo- or copolymers containing ether as a polymerization component are also included.
- an acid anhydride such as butanetetracarboxylic acid anhydride or pyromellitic acid anhydride
- polyethylene glycol monoallyl Polymers such as homo- or copolymers containing ether as a polymerization component are also included.
- the polymer having a polyethylene glycol group can be used alone or in combination of the above materials.
- the solvent of the nonaqueous electrolyte used in the present invention is not particularly limited, and for example, a solvent that has been conventionally used for nonaqueous electrolyte secondary batteries can be used.
- cyclic carbonates such as ethylene carbonate, propylene carbonate, butylene carbonate, vinylene carbonate, chain carbonates such as dimethyl carbonate, methyl ethyl carbonate, diethyl carbonate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, propionic acid
- esters such as ethyl and ⁇ -butyrolactone
- compounds having a sulfone group such as propane sultone, 1,2-dimethoxyethane, 1,2-diethoxyethane, tetrahydrofuran, 1,2-dioxane, 1,4 -Compounds containing ethers such as dioxane and 2-methyltetrahydrofuran, butyronit
- concentration of the solute is not particularly limited, but is preferably 0.8 to 1.8 mol per liter of the nonaqueous electrolytic solution.
- a conventionally used negative electrode can be used, and in particular, a carbon material capable of occluding and releasing lithium, a metal capable of forming an alloy with lithium, or an alloy containing the metal and / Or an alloy compound thereof, a mixture thereof, and the like.
- the carbon material for example, natural graphite, non-graphitizable carbon, graphite such as artificial graphite, coke, or the like can be used.
- the alloy compound include those containing at least one metal that can be alloyed with lithium.
- silicon or tin is preferable as an element that can be alloyed with lithium, and silicon oxide or tin oxide in which these are combined with oxygen can also be used.
- what mixed the said carbon material and the compound of silicon or tin can be used.
- a negative electrode material having a higher charge / discharge potential than lithium carbon such as lithium titanate can be used.
- separator used in the present invention for example, a conventionally used separator can be used. Specifically, not only a separator made of polyethylene, but also a material in which a layer made of polypropylene is formed on the surface of a polyethylene layer, or a material in which an aramid resin or the like is applied to the surface of a polyethylene separator may be used. .
- the decomposition product generated by the reaction between the positive electrode and the electrolytic solution is efficiently contained in the inorganic particle layer even when left in a high temperature atmosphere in a state where the end-of-charge voltage is higher than the normal 4.2 V. As a result, the battery can be prevented from being swollen.
- FIG. 1 is a front view of a non-aqueous electrolyte secondary battery produced in the example.
- FIG. 2 is a cross-sectional view taken along line AA in FIG.
- nonaqueous electrolyte secondary battery according to the present invention is not limited to the one shown in the following form, and can be implemented with appropriate modifications within a range not changing the gist thereof.
- Example 1 ⁇ Preparation of positive electrode> Mixer using lithium cobaltate as a positive electrode active material, acetylene black as a carbon conductive agent, and PVDF (polyvinylidene fluoride) at a mass ratio of 95: 2.5: 2.5, and NMP as a solvent Were mixed to prepare a positive electrode mixture slurry. The prepared slurry was applied to both sides of an aluminum foil, dried and rolled to obtain a positive electrode. The packing density of the positive electrode was 3.60 g / cm 3 .
- TiO 2 titanium oxide
- CMC carboxymethyl cellulose
- SBR butadiene rubber
- the solid content concentration of the inorganic particles is 30 parts by mass
- the dispersion stabilizer is used so as to be 0.2 parts by mass with respect to 100 parts by mass of the inorganic particles
- the binder is 3.8 parts by mass with respect to 100 parts by mass of the inorganic particles.
- the polyethylene glycol was used so as to be 1 part by mass with respect to 100 parts by mass of the inorganic particles.
- coating was carried out on both surfaces of the positive electrode by a gravure method, and water as a solvent was dried and removed to form inorganic particle layers on both surfaces of the positive electrode.
- the thickness of the inorganic particle layer on one side of the positive electrode was 2 ⁇ m, and the total thickness on both sides of the positive electrode was 4 ⁇ m.
- a negative electrode slurry was prepared such that 1% by mass of artificial graphite and CMC were dissolved in pure water and that of SBR with a solid content ratio of 98: 1: 1. Next, this slurry was applied / dried on both sides of the copper foil, and rolled to a packing density of 1.60 g / cc to prepare a negative electrode.
- the battery configuration is such that lead terminals are attached to each of the positive and negative electrodes, and a spiral wound through a separator (made of polyethylene: film thickness 16 ⁇ m, porosity 47%) is pressed and crushed flat.
- the electrode body was put into a battery exterior body using an aluminum laminate, poured, sealed, and used as battery A1.
- the design capacity of this battery is 850 mAh.
- the design capacity of the battery was designed based on the end-of-charge voltage up to 4.40V.
- the specific structure of the battery A ⁇ b> 1 is such that the positive electrode 1 and the negative electrode 2 are arranged to face each other with a separator 3 therebetween.
- a flat electrode body consisting of the above is impregnated with a non-aqueous electrolyte.
- the positive electrode 1 and the negative electrode 2 are connected to a positive electrode current collector tab 4 and a negative electrode current collector tab 5, respectively, and have a structure capable of charging and discharging as a secondary battery.
- the electrode body is disposed in a storage space of an aluminum laminate exterior body 6 having a closed portion 7 whose peripheral edges are heat-sealed.
- an inorganic particle layer is formed on the surface of the positive electrode 1.
- Example 2 A battery was produced in the same manner as in Example 1 except that the average molecular weight of polyethylene glycol added to the aqueous slurry for forming the inorganic particle layer was 1000 (trade name “polyethylene glycol 1000” manufactured by Wako Pure Chemical Industries, Ltd.). did. The battery thus produced is hereinafter referred to as battery A2.
- Example 3 A battery was prepared in the same manner as in Example 1 except that the average molecular weight of polyethylene glycol added to the aqueous slurry for forming the inorganic particle layer was 6000 (trade name “polyethylene glycol 6000” manufactured by Wako Pure Chemical Industries, Ltd.). did. The battery thus produced is hereinafter referred to as battery A3.
- Example 4 A battery was produced in the same manner as in Example 1 except that the average molecular weight of polyethylene glycol added to the aqueous slurry for forming the inorganic particle layer was 20000 (trade name “polyethylene glycol 20000” manufactured by Wako Pure Chemical Industries, Ltd.). did. The battery thus produced is hereinafter referred to as battery A4.
- Example 5 A battery was produced in the same manner as in Example 1 except that the average molecular weight of polyethylene glycol added to the aqueous slurry for forming the inorganic particle layer was 500,000 (trade name “polyethylene glycol 500000” manufactured by Wako Pure Chemical Industries, Ltd.). did. The battery thus produced is hereinafter referred to as battery A5.
- Example 6 A battery was prepared in the same manner as in Example 1 except that the average molecular weight of polyethylene glycol added to the aqueous slurry for forming the inorganic particle layer was 2000000 (trade name “polyethylene glycol 2000000” manufactured by Wako Pure Chemical Industries, Ltd.). did. The battery thus produced is hereinafter referred to as battery A6.
- Example 1 A battery was fabricated in the same manner as in Example 1 except that polyethylene glycol was not added to the aqueous slurry for forming the inorganic particle layer.
- the battery thus produced is hereinafter referred to as battery Z1.
- Example 2 A battery was fabricated in the same manner as in Example 1 except that ethylene glycol (“Ethylene glycol” manufactured by Kishida Chemical Co., Ltd.) was added to the aqueous slurry for forming the inorganic particle layer instead of polyethylene glycol. At this time, the average molecular weight of ethylene glycol was 62. The battery thus produced is hereinafter referred to as battery Z2.
- ethylene glycol (“Ethylene glycol” manufactured by Kishida Chemical Co., Ltd.) was added to the aqueous slurry for forming the inorganic particle layer instead of polyethylene glycol. At this time, the average molecular weight of ethylene glycol was 62.
- battery Z2 The battery thus produced is hereinafter referred to as battery Z2.
- Example 3 A battery was fabricated in the same manner as in Example 1, except that diethylene glycol (“diethylene glycol” manufactured by Kishida Chemical Co., Ltd.) was added to the aqueous slurry for forming the inorganic particle layer instead of polyethylene glycol. At this time, the average molecular weight of diethylene glycol was 106. The battery thus produced is hereinafter referred to as battery Z3.
- diethylene glycol manufactured by Kishida Chemical Co., Ltd.
- the present invention relates to a drive power source for mobile information terminals such as mobile phones, notebook computers and PDAs, a drive power source for high output devices such as HEVs and electric tools, and a power storage device combined with a solar cell or a power system. Can also be expected.
- Positive electrode 2 Negative electrode 3: Separator 4: Positive electrode current collecting tab 5: Negative electrode current collecting tab 6: Aluminum laminate outer package
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Abstract
Description
また、ポリエチレングリコール基を有するポリマーの平均分子量が200未満であると、分解物を吸着する能力が小さくなり、電池の膨化抑制効果が低下しやすくなる。また、ポリマーの平均分子量が2000000を超えると、スラリー溶媒中の溶解度が低下し、均一に正極または負極の表面に、若しくはセパレータ表面に無機粒子層を塗布できずに生産性が低下しやすくなる。
無機粒子層中に含まれるポリエチレングリコール基を有するポリマーの平均分子量が1000以上20000以下であることが特に好ましい。
また、これらを単独又は複数組み合わせて使用することができ、特に環状カーボネートと鎖状カーボネートとを組み合わせた溶媒が好ましい。
上記の他、エネルギー密度は低下するものの、負極材料としてはチタン酸リチウム等の金属リチウムに対する充放電の電位が、炭素材料等より高いものも用いることができる。
<正極の作製>
正極活物質としてのコバルト酸リチウムと、炭素導電剤であるアセチレンブラックと、PVDF(ポリフッ化ビニリデン)を、95:2.5:2.5の質量比で混合して、NMPを溶剤として混合機を用いて混合し、正極合剤スラリーを調製した。
調製したスラリーをアルミニウム箔の両面に塗布し、乾燥後、圧延して正極とした。なお、正極の充填密度は、3.60g/cm3とした。
溶剤として水を用い、酸化チタン(TiO2、平均粒子径:0.25μm、表面処理層無、)を無機粒子として用い、分散安定剤としてカルボキシメチルセルロース(CMC)を用い、水系バインダーとして、スチレン・ブタジエンゴム(SBR)を用い、平均分子量が200のポリエチレングリコール(和光純薬工業株式会社製商品名「ポリエチレングリコール200」)を添加し、無機粒子層形成のための水系スラリーを調製した。無機粒子の固形分濃度を30質量部とし、分散安定剤を無機粒子100質量部に対して0.2質量部となるように用い、バインダーを無機粒子100質量部に対し3.8質量部となるように用い、ポリエチレングリコールを無機粒子100質量部に対して1質量部となるように用いた。この水系スラリーを用いて、正極の両面上にグラビア方式で塗工し、溶媒である水を乾燥・除去して、正極の両面上に無機粒子層を形成した。正極片面の無機粒子層の厚みを2μmとし、正極の両面の合計で4μmとなるように形成した。
人造黒鉛とCMCを純水に1質量%溶解させたものと、SBRを固形分比で98:1:1の質量比となるように負極スラリーを作製した。次いで、このスラリーを銅箔の両面に塗着/乾燥し、充填密度1.60g/ccになるように圧延し、負極を作製した。
非水溶媒としてエチレンカーボネート(EC)とメチルエチルカーボネート(MEC)とを体積比30:70で混合した後、電解質塩としての六フッ化燐酸リチウム(LiPF6)を1M(モル/リットル)となるように溶解した電解液を調製した。
電池の構成は正・負極それぞれにリード端子を取り付け、セパレータ(ポリエチレン製:膜厚16μm、空孔率47%)を介して渦巻状に巻き取ったものをプレスして、扁平状に押し潰した電極体を電池外装体としてアルミニウムラミネートを用いたものに入れて注液を行い、封止して電池A1とした。尚、本電池の設計容量は850mAhである。電池の設計容量としては、4.40Vまでの充電終止電圧を基準にして設計を行った。
尚、図示しないが、正極1の表面には無機粒子層が形成されている。
無機粒子層形成のための水系スラリーに添加するポリエチレングリコールの平均分子量が1000(和光純薬工業株式会社製商品名「ポリエチレングリコール1000」)であること以外は実施例1と同様にして電池を作製した。
このようにして作製した電池を、以下、電池A2と称する。
無機粒子層形成のための水系スラリーに添加するポリエチレングリコールの平均分子量が6000(和光純薬工業株式会社製商品名「ポリエチレングリコール6000」)であること以外は実施例1と同様にして電池を作製した。
このようにして作製した電池を、以下、電池A3と称する。
無機粒子層形成のための水系スラリーに添加するポリエチレングリコールの平均分子量が20000(和光純薬工業株式会社製商品名「ポリエチレングリコール20000」)であること以外は実施例1と同様にして電池を作製した。
このようにして作製した電池を、以下、電池A4と称する。
無機粒子層形成のための水系スラリーに添加するポリエチレングリコールの平均分子量が500000(和光純薬工業株式会社製商品名「ポリエチレングリコール500000」)であること以外は実施例1と同様にして電池を作製した。
このようにして作製した電池を、以下、電池A5と称する。
無機粒子層形成のための水系スラリーに添加するポリエチレングリコールの平均分子量が2000000(和光純薬工業株式会社製商品名「ポリエチレングリコール2000000」)であること以外は実施例1と同様にして電池を作製した。
このように作製した電池を、以下、電池A6と称する。
無機粒子層形成のための水系スラリーにポリエチレングリコールを添加しないこと以外は実施例1と同様にして電池を作製した。
このようにして作製した電池を、以下、電池Z1と称する。
無機粒子層形成のための水系スラリーにポリエチレングリコールではなく、エチレングリコール(キシダ化学株式会社製「エチレングリコール」)を添加したこと以外は実施例1と同様にして電池を作製した。尚、このときのエチレングリコールの平均分子量は62であった。
このようにして作製した電池を、以下、電池Z2と称する。
無機粒子層形成のための水系スラリーにポリエチレングリコールではなく、ジエチレングリコール(キシダ化学株式会社製「ジエチレングリコール」)を添加したこと以外は実施例1と同様にして電池を作製した。尚、このときのジエチレングリコールの平均分子量は106であった。
このようにして作製した電池を、以下、電池Z3と称する。
上記の電池A1~A6、Z1~Z3について、下記条件にて実験及び評価し、それらの結果を表1に示す。
充電終止電圧4.40V、1It定電流―定電圧充電(終止電流1/50It)で充電した電池の厚みを測定した。厚み測定後の電池を80℃恒温槽内にて2日間保存した。恒温槽から取り出し直後に厚みを計測し、以下の式により厚み増加率(%)を測定した。
厚み増加率(%)=(保存後厚み÷保存前厚み)×100-100
また、表1の結果より、平均分子量が1000以上20000以下であることが特に好ましいことがわかる。
これは、平均分子量が小さいと電解液の分解物を吸着する能力が低下し、電池膨れ抑制効果が小さくなり、平均分子量が大きすぎるとスラリー溶媒への溶解性が悪く、正極表面に均一に塗布することが難しくなるため生産性が低下するためであると考えられる。
また表1の比較例Z1~Z3の結果から、特開2011-71047号公報に開示されているエチレングリコールやジエチレングリコールは保存膨れ抑制効果がほとんどないことが分かる。
2:負極
3:セパレータ
4:正極集電タブ
5:負極集電タブ
6:アルミラミネート外装体
Claims (8)
- 正極活物質を含む正極と、負極活物質を含む負極と、非水電解質と、前記正極及び前記負極の間に設けられるセパレータを備える非水電解質二次電池であって、前記正極と前記セパレータの間もしくは前記負極と前記セパレータの間に無機粒子層が形成されており、かつ、前記無機粒子層中にポリエチレングリコール基を有するポリマーが含有されており、前記ポリエチレングリコール基を有するポリマーの平均分子量が200以上であることを特徴とする非水電解質二次電池。
- 前記無機粒子層中に含まれるポリエチレングリコール基を有するポリマーの平均分子量が200以上2000000以下であることを特徴とする請求項1の非水電解質二次電池。
- 前記無機粒子層中に含有されるポリエチレングリコール基を有するポリマーが、ポリエチレングリコールであることを特徴とする請求項1または2の非水電解質二次電池。
- 前記無機粒子層が、前記正極と前記セパレータとの間に形成されていることを特徴とする請求項1~3のいずれか1項に記載の非水電解質二次電池。
- 前記無機粒子層が、前記正極の表面上に形成されていることを特徴とする請求項1~4のいずれか1項に記載の非水電解質二次電池。
- 前記無機粒子層に含まれる無機粒子の平均粒子径が1μm以下であることを特徴とする請求項1~5のいずれか1項に記載の非水電解質二次電池。
- 前記無機粒子層に含まれる無機粒子が、ルチル型チタニアまたはアルミナから選ばれる少なくとも1種であることを特徴とする請求項1~6のいずれか1項に記載の非水電解質二次電池。
- 前記無機粒子層に含まれる無機粒子の平均粒径が、セパレータの平均孔径よりも小さいことを特徴とする請求項1~7のいずれか1項に記載の非水電解質二次電池。
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US14/123,328 US9620758B2 (en) | 2011-06-30 | 2012-05-10 | Nonaqueous electrolyte secondary battery |
JP2013522517A JP6081357B2 (ja) | 2011-06-30 | 2012-05-10 | 非水電解質二次電池 |
CN201280032345.4A CN103636053B (zh) | 2011-06-30 | 2012-05-10 | 非水电解质二次电池 |
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Cited By (2)
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JP2015176815A (ja) * | 2014-03-17 | 2015-10-05 | 株式会社豊田自動織機 | 蓄電装置用電極の製造方法、蓄電装置用電極の絶縁層形成用スラリー、蓄電装置用電極、及び、蓄電装置 |
JP2015185410A (ja) * | 2014-03-25 | 2015-10-22 | 三洋電機株式会社 | 非水電解質二次電池 |
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KR20220020118A (ko) | 2020-08-11 | 2022-02-18 | 주식회사 엘지에너지솔루션 | 리튬-황 전지용 양극 활물질, 이의 제조방법 및 이를 포함하는 리튬-황 전지 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009181756A (ja) * | 2008-01-30 | 2009-08-13 | Hitachi Maxell Ltd | リチウムイオン二次電池およびこれを用いた電子機器 |
WO2009123168A1 (ja) * | 2008-03-31 | 2009-10-08 | 日本ゼオン株式会社 | 多孔膜および二次電池電極 |
WO2010098434A1 (ja) * | 2009-02-27 | 2010-09-02 | 日本ゼオン株式会社 | リチウムイオン二次電池用電極 |
JP2011071047A (ja) * | 2009-09-28 | 2011-04-07 | Sanyo Electric Co Ltd | 非水電解質二次電池用正極の製造方法、並びに非水電解質二次電池用正極及びそれを用いた非水電解質二次電池 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100497251B1 (ko) * | 2003-08-20 | 2005-06-23 | 삼성에스디아이 주식회사 | 리튬 설퍼 전지용 음극 보호막 조성물 및 이를 사용하여제조된 리튬 설퍼 전지 |
KR100542213B1 (ko) * | 2003-10-31 | 2006-01-10 | 삼성에스디아이 주식회사 | 리튬 금속 전지용 음극 및 이를 포함하는 리튬 금속 전지 |
CN100588004C (zh) | 2006-04-26 | 2010-02-03 | 北京大学 | 一种聚合物复合隔膜及其制备方法 |
JP2009032668A (ja) * | 2007-06-22 | 2009-02-12 | Panasonic Corp | 非水系二次電池、電池パック、電源システム、及び電動機器 |
CN103280546B (zh) * | 2007-12-14 | 2015-09-02 | 松下电器产业株式会社 | 非水电解质二次电池 |
-
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- 2012-05-10 WO PCT/JP2012/061976 patent/WO2013001919A1/ja active Application Filing
- 2012-05-10 CN CN201280032345.4A patent/CN103636053B/zh active Active
- 2012-05-10 JP JP2013522517A patent/JP6081357B2/ja active Active
- 2012-05-10 US US14/123,328 patent/US9620758B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009181756A (ja) * | 2008-01-30 | 2009-08-13 | Hitachi Maxell Ltd | リチウムイオン二次電池およびこれを用いた電子機器 |
WO2009123168A1 (ja) * | 2008-03-31 | 2009-10-08 | 日本ゼオン株式会社 | 多孔膜および二次電池電極 |
WO2010098434A1 (ja) * | 2009-02-27 | 2010-09-02 | 日本ゼオン株式会社 | リチウムイオン二次電池用電極 |
JP2011071047A (ja) * | 2009-09-28 | 2011-04-07 | Sanyo Electric Co Ltd | 非水電解質二次電池用正極の製造方法、並びに非水電解質二次電池用正極及びそれを用いた非水電解質二次電池 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015176815A (ja) * | 2014-03-17 | 2015-10-05 | 株式会社豊田自動織機 | 蓄電装置用電極の製造方法、蓄電装置用電極の絶縁層形成用スラリー、蓄電装置用電極、及び、蓄電装置 |
JP2015185410A (ja) * | 2014-03-25 | 2015-10-22 | 三洋電機株式会社 | 非水電解質二次電池 |
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US20140093767A1 (en) | 2014-04-03 |
CN103636053A (zh) | 2014-03-12 |
US9620758B2 (en) | 2017-04-11 |
CN103636053B (zh) | 2016-10-12 |
JP6081357B2 (ja) | 2017-02-15 |
JPWO2013001919A1 (ja) | 2015-02-23 |
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