JP5245191B2 - 非水電解液二次電池 - Google Patents
非水電解液二次電池 Download PDFInfo
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- JP5245191B2 JP5245191B2 JP2005236276A JP2005236276A JP5245191B2 JP 5245191 B2 JP5245191 B2 JP 5245191B2 JP 2005236276 A JP2005236276 A JP 2005236276A JP 2005236276 A JP2005236276 A JP 2005236276A JP 5245191 B2 JP5245191 B2 JP 5245191B2
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- aqueous electrolyte
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- 239000011255 nonaqueous electrolyte Substances 0.000 title claims description 41
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 23
- 239000002904 solvent Substances 0.000 claims description 20
- 239000003792 electrolyte Substances 0.000 claims description 17
- 229910013870 LiPF 6 Inorganic materials 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 13
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 9
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims description 9
- 239000003575 carbonaceous material Substances 0.000 claims description 8
- 239000007774 positive electrode material Substances 0.000 claims description 7
- 239000007773 negative electrode material Substances 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 18
- 229910001416 lithium ion Inorganic materials 0.000 description 18
- 229910052744 lithium Inorganic materials 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 14
- 238000007600 charging Methods 0.000 description 13
- 239000008151 electrolyte solution Substances 0.000 description 12
- -1 polyethylene Polymers 0.000 description 12
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 10
- 238000007599 discharging Methods 0.000 description 9
- 230000007423 decrease Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 239000004698 Polyethylene Substances 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 6
- 229920000573 polyethylene Polymers 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 238000001465 metallisation Methods 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- 239000011149 active material Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000010280 constant potential charging Methods 0.000 description 4
- 238000010277 constant-current charging Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002003 electrode paste Substances 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 238000013508 migration Methods 0.000 description 4
- 230000005012 migration Effects 0.000 description 4
- 239000012046 mixed solvent Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000011889 copper foil Substances 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- IZJSTXINDUKPRP-UHFFFAOYSA-N aluminum lead Chemical compound [Al].[Pb] IZJSTXINDUKPRP-UHFFFAOYSA-N 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010494 dissociation reaction Methods 0.000 description 2
- 230000005593 dissociations Effects 0.000 description 2
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- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- WWSJZGAPAVMETJ-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-3-ethoxypyrazol-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C=1C(=NN(C=1)CC(=O)N1CC2=C(CC1)NN=N2)OCC WWSJZGAPAVMETJ-UHFFFAOYSA-N 0.000 description 1
- 229910014195 BM-400B Inorganic materials 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910020599 Co 3 O 4 Inorganic materials 0.000 description 1
- 102100031416 Gastric triacylglycerol lipase Human genes 0.000 description 1
- 101000941284 Homo sapiens Gastric triacylglycerol lipase Proteins 0.000 description 1
- 229910001290 LiPF6 Inorganic materials 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000002180 crystalline carbon material Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- HDNHWROHHSBKJG-UHFFFAOYSA-N formaldehyde;furan-2-ylmethanol Chemical compound O=C.OCC1=CC=CO1 HDNHWROHHSBKJG-UHFFFAOYSA-N 0.000 description 1
- 239000007849 furan resin Substances 0.000 description 1
- 229910021397 glassy carbon Inorganic materials 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000005300 metallic glass Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 239000011331 needle coke Substances 0.000 description 1
- 229910021470 non-graphitizable carbon Inorganic materials 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000006253 pitch coke Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000002296 pyrolytic carbon Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- 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
- H01M10/0566—Liquid materials
- H01M10/0568—Liquid materials characterised by the solutes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- 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
- H01M10/0566—Liquid materials
- H01M10/0569—Liquid materials characterised by the solvents
-
- H—ELECTRICITY
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
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- H—ELECTRICITY
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
- H01M2300/0028—Organic electrolyte characterised by the solvent
- H01M2300/0037—Mixture of solvents
- H01M2300/004—Three solvents
-
- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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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
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Materials Engineering (AREA)
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- Battery Electrode And Active Subsutance (AREA)
Description
請求項6記載の発明は、請求項1記載の内容を前提として、正負極およびセパレータからなる電極群が多数回捲回された円筒型構造であることを特徴とする。電極群の構成としては円筒型のほかに角型(捲回タイプと積層タイプ)があるが、充放電時に捲回方向の芯部において高い拘束を受ける円筒型に本発明の技術を用いると、その効果が一層顕著となるので好ましい。
定された本発明の円筒型非水電解液二次電池が構成される。
なおこの非水電解質二次電池1に、電池内部の圧力が所定値よりも高くなったときに内部の気体を抜くための安全弁装置13を設けてもよい。さらに上述の記載では一例として円筒型を挙げたが、角型、コイン型、ボタン型等、その形状については特に限定されない。
Li2CO3とCo3O4とNiOとMnO2とを焼成後Li0.94Ni0.35Mn0.35Co0.35O2となるように混合し、900℃で10時間焼成し正極活物質を作製した。この正極活物質100重量部をアセチレンブラック2.5重量部、フッ素樹脂系結着剤4重量部、及び適量のカルボキシメチルセルロース水溶液と共に双腕式練合機にて攪拌し、正極ペーストを作製した。このペーストを30μm厚のアルミニウム箔の両面に塗布乾燥し、総厚が99μm、単位面積当たりの理論容量が3.7mAh/cm2、合材部の多孔度が25%となるようにして圧延した後、塗工幅52mm、塗工長さ1660mの寸法に裁断し正極を得た。
非水電解液の溶媒に体積比率としてEC:EMC:DMC=10:15:75、20:15:65、15:10:75、15:20:65の混合溶媒を用いたこと以外は実施例1と同様にして作製した電池を本発明の実施例2〜5とする。
実施例1記載の溶媒に1.30および1.50MのLiPF6を溶解したものを用いたこと以外は実施例1と同様にして作製した電池を本発明の実施例6〜7とする。
正極の単位面積当たりの理論容量が3.0および4.5mAh/gとなるように電極厚みおよび長さを調整したこと以外は実施例1と同様にして作製した電池を本発明の実施例8〜9とする。
合材部の多孔度(35%)を維持しつつ負極負荷が、220、290mAh/gとなるように負極厚みを調整したこと以外は実施例1と同様にして作製した電池を本発明の実施例10〜11とする。
実施例1記載のポリエチレン製のセパレータの厚みが18、25、15、30μmのものを用いたこと以外は実施例1と同様にして作製した電池を本発明の実施例12〜15とする。
(比較例1〜4)
非水電解液の溶媒に体積比率としてEC:EMC:DMC=5:15:80、25:10:60、15:5:80、15:25:60の混合溶媒を用いたこと以外は実施例1と同様にして作製した電池を比較例1〜4とする。
(比較例5〜6)
実施例1記載の溶媒に1.20および1.60MのLiPF6を溶解したものを用いたこと以外は実施例1と同様にして作製した電池を比較例5〜6とする。
(比較例7〜8)
正極の単位面積当たりの理論容量が2.5および5.0mAh/gとなるように電極厚みおよび長さを調整したこと以外は実施例1と同様にして作製した電池を比較例7〜8とする。
−5℃環境において10Aの定電流充電にて充電電圧4.2Vに達した後、4.2V一定下で終止電流を0.26Aとした定電圧充電を行い、20分の休止後、放電電流20Aで放電終止電圧2.0Vの定電流放電を行った。次いで20℃環境において10Aの定電流充電にて充電電圧4.2Vに達した後、4.2V一定下で終止電流を0.26Aとした定電圧充電を行い、20分の休止後、放電電流20Aで放電終止電圧2.0Vの定電流放電を行った。その際の20℃放電容量に対する−5℃放電容量の比率を「容量比率」として(表1)に示す。
−5℃環境において10Aの定電流充電にて充電電圧4.2Vに達した後、4.2V一定下で終始電流を0.26Aとした定電圧充電を行い、20分の休止後、放電電流20Aで放電終止電圧2.0Vの定電流放電を行い、その後20分の休止の充放電サイクルを10回繰り返した後に50℃の環境下で直径3mmの釘を5mmの速度で電池の中心に貫通させた。ここで電池表面温度が130℃を超えた電池については過熱が起こったと認定した。各例5セルに対する過熱発生セルの数を(表1)に示す。
−5℃環境において10Aの定電流充電にて充電電圧4.2Vに達した後、4.2V一定下で終始電流を0.26Aとした定電圧充電を行い、20分の休止後、放電電流20Aで放電終止電圧2.0Vの定電流放電を行い、その後20分の休止の充放電サイクルを繰り返した際のサイクル数に対する容量維持率を測定した。その200サイクル目の容量維持率の結果を「サイクル維持率」として(表1)に示す。
入れ性が低下したためと考えられる。実施例14はセパレータの厚みが薄く電解液の保有量が低下し、電解液の拡散抵抗が増加したためと考えられる。逆に実施例15はセパレータの厚みが大きくリチウムの移動距離が長くなり、リチウムイオンの拡散抵抗が増加したためと考えられる。
2 負極
3 正極
4 セパレータ
5 電池缶
6 負極集電体
7 正極集電体
8 絶縁板
9 負極リード
10 正極リード
11 電池蓋
12 絶縁封口ガスケット
13 安全弁装置
Claims (6)
- 正極と、負極と、セパレータと、非水電解液とからなる非水電解液二次電池であって、
前記正極は、単位面積当たりの理論容量が3.0〜4.5mAh/cm2であり、
前記非水電解液は、溶媒として炭酸エチレン、炭酸メチルエチル、および炭酸ジメチルを含み、かつ電解質としてLiPF6を含み、
前記非水電解液の全溶媒は、炭酸エチレン、炭酸メチルエチル、および炭酸ジメチルのみからなり、
前記各溶媒の前記全溶媒に対する体積比率はそれぞれ炭酸エチレンが10〜20%、炭酸メチルエチルが10〜20%、炭酸ジメチルが65〜75%であって、
LiPF6の濃度が1.30〜1.50Mであることを特徴とする非水電解液二次電池。 - 前記正極は正極活物質を含む合剤層と集電体とからなり、この合剤層の空孔体積比率が24〜31%であ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。
- 前記負極の活物質は炭素材料を主体とす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。
- 電池容量をA、前記炭素材料の重量をBとしたときに、負極負荷A/Bが220〜290mAh/gであることを特徴とする、請求項3記載の非水電解液二次電池。
- 前記セパレータの厚さが18〜25μmであ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。
- 前記正極、負極およびセパレータからなる電極群は、多数回捲回された円筒型構造であることを特徴とする、請求項1に記載の非水電解液二次電池。
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CNB2006101150425A CN100541902C (zh) | 2005-08-17 | 2006-08-17 | 非水电解液二次电池 |
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JP5708964B2 (ja) * | 2009-02-17 | 2015-04-30 | トヨタ自動車株式会社 | リチウム二次電池とその製造方法 |
KR101117695B1 (ko) | 2009-10-30 | 2012-03-02 | 삼성에스디아이 주식회사 | 리튬 전지용 전해액, 이를 포함한 리튬 전지 및 상기 리튬 전지의 작동 방법 |
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CN108352561B (zh) * | 2015-11-06 | 2021-10-15 | 昭和电工材料株式会社 | 锂离子二次电池 |
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