JP5213015B2 - リチウムイオン二次電池 - Google Patents
リチウムイオン二次電池 Download PDFInfo
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- JP5213015B2 JP5213015B2 JP2007228851A JP2007228851A JP5213015B2 JP 5213015 B2 JP5213015 B2 JP 5213015B2 JP 2007228851 A JP2007228851 A JP 2007228851A JP 2007228851 A JP2007228851 A JP 2007228851A JP 5213015 B2 JP5213015 B2 JP 5213015B2
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- negative electrode
- electrode layer
- secondary battery
- lithium ion
- ion secondary
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims description 30
- 229910001416 lithium ion Inorganic materials 0.000 title claims description 30
- 239000011248 coating agent Substances 0.000 claims description 22
- 238000000576 coating method Methods 0.000 claims description 22
- 239000007773 negative electrode material Substances 0.000 claims description 16
- 229910021383 artificial graphite Inorganic materials 0.000 claims description 12
- 229910021382 natural graphite Inorganic materials 0.000 claims description 12
- 239000011149 active material Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 72
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 14
- 239000002002 slurry Substances 0.000 description 10
- 239000002033 PVDF binder Substances 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 7
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 7
- 239000006229 carbon black Substances 0.000 description 6
- 238000007600 charging Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 230000014759 maintenance of location Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 3
- 238000007606 doctor blade method Methods 0.000 description 3
- 239000008151 electrolyte solution Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 2
- 239000000010 aprotic solvent Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000002482 conductive additive Substances 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- 229910003002 lithium salt Inorganic materials 0.000 description 2
- 159000000002 lithium salts Chemical class 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 2
- 239000011255 nonaqueous electrolyte Substances 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- PYOKUURKVVELLB-UHFFFAOYSA-N trimethyl orthoformate Chemical compound COC(OC)OC PYOKUURKVVELLB-UHFFFAOYSA-N 0.000 description 2
- -1 γ-butyrolactone Chemical compound 0.000 description 2
- ZZXUZKXVROWEIF-UHFFFAOYSA-N 1,2-butylene carbonate Chemical compound CCC1COC(=O)O1 ZZXUZKXVROWEIF-UHFFFAOYSA-N 0.000 description 1
- LZDKZFUFMNSQCJ-UHFFFAOYSA-N 1,2-diethoxyethane Chemical compound CCOCCOCC LZDKZFUFMNSQCJ-UHFFFAOYSA-N 0.000 description 1
- VFRGATWKSPNXLT-UHFFFAOYSA-N 1,2-dimethoxybutane Chemical compound CCC(OC)COC VFRGATWKSPNXLT-UHFFFAOYSA-N 0.000 description 1
- CYSGHNMQYZDMIA-UHFFFAOYSA-N 1,3-Dimethyl-2-imidazolidinon Chemical compound CN1CCN(C)C1=O CYSGHNMQYZDMIA-UHFFFAOYSA-N 0.000 description 1
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 description 1
- WNXJIVFYUVYPPR-UHFFFAOYSA-N 1,3-dioxolane Chemical compound C1COCO1 WNXJIVFYUVYPPR-UHFFFAOYSA-N 0.000 description 1
- JWUJQDFVADABEY-UHFFFAOYSA-N 2-methyltetrahydrofuran Chemical compound CC1CCCO1 JWUJQDFVADABEY-UHFFFAOYSA-N 0.000 description 1
- PPDFQRAASCRJAH-UHFFFAOYSA-N 2-methylthiolane 1,1-dioxide Chemical compound CC1CCCS1(=O)=O PPDFQRAASCRJAH-UHFFFAOYSA-N 0.000 description 1
- VWIIJDNADIEEDB-UHFFFAOYSA-N 3-methyl-1,3-oxazolidin-2-one Chemical compound CN1CCOC1=O VWIIJDNADIEEDB-UHFFFAOYSA-N 0.000 description 1
- 229910010238 LiAlCl 4 Inorganic materials 0.000 description 1
- 229910015015 LiAsF 6 Inorganic materials 0.000 description 1
- 229910013063 LiBF 4 Inorganic materials 0.000 description 1
- 229910013684 LiClO 4 Inorganic materials 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- 229910015118 LiMO Inorganic materials 0.000 description 1
- 229910012513 LiSbF 6 Inorganic materials 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 150000001733 carboxylic acid esters Chemical class 0.000 description 1
- 150000005678 chain carbonates Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010281 constant-current constant-voltage charging Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 150000005676 cyclic carbonates Chemical class 0.000 description 1
- 150000004292 cyclic ethers Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 125000004177 diethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- ASQQEOXYFGEFKQ-UHFFFAOYSA-N dioxirane Chemical compound C1OO1 ASQQEOXYFGEFKQ-UHFFFAOYSA-N 0.000 description 1
- 150000004862 dioxolanes Chemical class 0.000 description 1
- VUPKGFBOKBGHFZ-UHFFFAOYSA-N dipropyl carbonate Chemical compound CCCOC(=O)OCCC VUPKGFBOKBGHFZ-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- KLKFAASOGCDTDT-UHFFFAOYSA-N ethoxymethoxyethane Chemical compound CCOCOCC KLKFAASOGCDTDT-UHFFFAOYSA-N 0.000 description 1
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 125000000457 gamma-lactone group Chemical group 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 229910021385 hard carbon Inorganic materials 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- LYGJENNIWJXYER-UHFFFAOYSA-N nitromethane Chemical compound C[N+]([O-])=O LYGJENNIWJXYER-UHFFFAOYSA-N 0.000 description 1
- 229910021470 non-graphitizable carbon Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Substances OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- FVSKHRXBFJPNKK-UHFFFAOYSA-N propionitrile Chemical compound CCC#N FVSKHRXBFJPNKK-UHFFFAOYSA-N 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910021384 soft carbon Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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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
- 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
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- Battery Electrode And Active Subsutance (AREA)
Description
図1は、本発明のリチウムイオン二次電池の負極電極の構成を説明する断面図である。負極集電体1上に第一の負極層2aが形成され、第一の負極層2a上に第二の負極層2bが形成された構造となっている。第一の負極層2aは負極活物質として比表面積1.0m2/gの人造黒鉛を95重量部、導電助剤としてカーボンブラックを2重量部、結着剤としてPVdFを3重量部となるように混合し、これをNMP溶液と混合してスラリーを調製し、このスラリーを厚さ20μmの銅製の負極集電体1の両面にドクターブレード法により塗布して得た。第二の負極層2bは負極活物質として比表面積3.5m2/gの天然黒鉛を95重量部、導電助剤としてカーボンブラックを2重量部、結着剤としてPVdFを3重量部となるように混合し、これをNMP溶液と混合してスラリーを調製し、上述した第一の負極層2aの上にドクターブレード法により第二の負極層2bを塗布し、負極層2を形成した。なお、第一の負極層/第二の負極層の塗布量の重量比は25/75とした。
第一の負極層、第二の負極層の塗布量をそれぞれ50%としたほかは、実施例1と同様の作製方法によりリチウムイオン二次電池を作製した。
第一の負極層の塗布量を10%、第二の負極層の塗布量を90%としたほかは、実施例1と同様の作製方法によりリチウムイオン二次電池を作製した。
第一の負極層の塗布量を70%、第二の負極層の塗布量を30%としたほかは、実施例1と同様の作製方法によりリチウムイオン二次電池を作製した。
図2は、従来のリチウムイオン二次電池の負極電極の構成を説明する断面図である。負極集電体1上に負極層2が形成された構造となっている。ここでは実施例1において第一の負極層の塗布量を100%としたほかは、実施例1と同様の作製方法によりリチウムイオン二次電池を作製した。
第二の負極層の塗布量を100%としたほかは、実施例1と同様の作製方法によりリチウムイオン二次電池を作製した。
2a 第一の負極層
2b 第二の負極層
2 負極層
Claims (2)
- 正極電極と負極電極をセパレータを介して配置したリチウムイオン二次電池において、負極集電体上に二層の負極層を有し、前記負極集電体に近い側の第一の負極層に比較して、前記負極集電体から遠い側の第二の負極層の充電レート特性が高く、前記第一の負極層の負極活物質が人造黒鉛を有し、前記第二の負極層の負極活物質が天然黒鉛を有し、前記人造黒鉛は前記天然黒鉛に比べて比表面積が小さいことを特徴とするリチウムイオン二次電池。
- 前記第一の負極層と第二の負極層の塗布量の重量比(第一の負極層の塗布量/第二の負極層の塗布量)が10/90から70/30の範囲であることを特徴とする請求項1に記載のリチウムイオン二次電池。
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JP2007228851A JP5213015B2 (ja) | 2007-09-04 | 2007-09-04 | リチウムイオン二次電池 |
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JP2007228851A JP5213015B2 (ja) | 2007-09-04 | 2007-09-04 | リチウムイオン二次電池 |
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JP2009064574A JP2009064574A (ja) | 2009-03-26 |
JP5213015B2 true JP5213015B2 (ja) | 2013-06-19 |
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US10910639B2 (en) | 2016-10-12 | 2021-02-02 | Lg Chem, Ltd. | Multi-layer negative electrode with different binder content and different particle size of active material in each layer and lithium secondary battery comprising the same |
EP3944373A4 (en) * | 2020-04-30 | 2022-06-01 | Jacobio Pharmaceuticals Co., Ltd. | SECONDARY BATTERY AND METHOD FOR PREPARING IT, AND DEVICE COMPRISING A SECONDARY BATTERY |
US11916225B2 (en) | 2019-04-09 | 2024-02-27 | Sk On Co., Ltd. | Lithium secondary battery |
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KR20130001268A (ko) * | 2010-03-15 | 2013-01-03 | 도요타지도샤가부시키가이샤 | 리튬 2차 전지 |
TWI482344B (zh) | 2010-12-23 | 2015-04-21 | Ind Tech Res Inst | 鋰電池與極板結構 |
WO2013018182A1 (ja) * | 2011-07-29 | 2013-02-07 | トヨタ自動車株式会社 | リチウムイオン二次電池 |
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JP5217095B2 (ja) * | 2006-02-10 | 2013-06-19 | トヨタ自動車株式会社 | 非水系二次電池の製造方法、及び、電極の製造方法 |
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2007
- 2007-09-04 JP JP2007228851A patent/JP5213015B2/ja active Active
Cited By (8)
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US10910639B2 (en) | 2016-10-12 | 2021-02-02 | Lg Chem, Ltd. | Multi-layer negative electrode with different binder content and different particle size of active material in each layer and lithium secondary battery comprising the same |
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