JP2009070658A - 非水電解質二次電池 - Google Patents
非水電解質二次電池 Download PDFInfo
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- JP2009070658A JP2009070658A JP2007236935A JP2007236935A JP2009070658A JP 2009070658 A JP2009070658 A JP 2009070658A JP 2007236935 A JP2007236935 A JP 2007236935A JP 2007236935 A JP2007236935 A JP 2007236935A JP 2009070658 A JP2009070658 A JP 2009070658A
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- 238000000576 coating method Methods 0.000 claims abstract description 23
- 239000007773 negative electrode material Substances 0.000 claims abstract description 19
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- 229910003002 lithium salt Inorganic materials 0.000 description 2
- 159000000002 lithium salts Chemical class 0.000 description 2
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- VWIIJDNADIEEDB-UHFFFAOYSA-N 3-methyl-1,3-oxazolidin-2-one Chemical compound CN1CCOC1=O VWIIJDNADIEEDB-UHFFFAOYSA-N 0.000 description 1
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- 229910012513 LiSbF 6 Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
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- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
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- VUPKGFBOKBGHFZ-UHFFFAOYSA-N dipropyl carbonate Chemical compound CCCOC(=O)OCCC VUPKGFBOKBGHFZ-UHFFFAOYSA-N 0.000 description 1
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- 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
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
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Images
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
-
- 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
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- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
【解決手段】負極および正極をセパレータを介して積層し、捲回した電池要素を外装体に収納した非水電解質二次電池において、負極活物質が前記負極の内周部1と外周部2とで異なる炭素材料とし、その塗布面積の割合を、内周部塗布面積/外周部塗布面積が4.5/5.5〜6.0/4.0とする。その炭素材料は、内周部で人造黒鉛、外周部側で天然黒鉛とする。
【選択図】図1
Description
負極の作製について説明する。まず負極活物質として比表面積1.0m2/gのメソカーボンマイクロビーズ(MCMB)を95質量%、導電性物質としてカーボンブラックを2質量%、結着剤としてPVDFを3質量%となるように混合しNMPを溶剤として分散混合し調製した負極合剤を厚さ10μmの銅製の集電体3上の内周部1の片面に塗布乾燥した。次に負極活物質として比表面積3.5m2/gの鱗片状天然黒鉛を95質量%、導電性物質としてカーボンブラックを2質量%、結着剤としてPVDFを3質量%となるように混合しNMPを溶剤として分散混合し調製した負極合剤を厚さ10μmの銅製の集電体3上の外周部2の片面に内周部の塗布方向と反対向きに塗布乾燥した。その後、反対面にも同様に塗布乾燥して負極を作製した。ここで負極の内周部に塗布した面積を(SA)、外周部に塗布した面積を(SB)とすると、塗布面積の割合が、内周部塗布面積(SA)/外周部塗布面積(SB)=3.5/6.5となるように作製した。なお圧縮後の負極の塗布部の寸法は、幅44mm、長さ370mm、厚さ134μmとなった。
負極の塗布面積の割合が、内周部塗布面積(SA)/外周部塗布面積(SB)= 4.0/6.0となるように作製した以外は実施例1と同様に非水電解質二次電池を作製した。
負極の塗布面積の割合が、内周部塗布面積(SA)/外周部塗布面積(SB)= 4.5/5.5となるように作製した以外は実施例1と同様に非水電解質二次電池を作製した。
負極の塗布面積の割合が、内周部塗布面積(SA)/外周部塗布面積(SB)= 5.0/5.0となるように作製した以外は実施例1と同様に非水電解質二次電池を作製した。
負極の塗布面積の割合が、内周部塗布面積(SA)/外周部塗布面積(SB)= 5.5/4.5となるように作製した以外は実施例1と同様に非水電解質二次電池を作製した。
負極の塗布面積の割合が、内周部塗布面積(SA)/外周部塗布面積(SB)= 6.0/4.0となるように作製した以外は実施例1と同様に非水電解質二次電池を作製した。
負極の塗布面積の割合が、内周部塗布面積(SA)/外周部塗布面積(SB)= 6.5/3.5 となるように作製した以外は実施例1と同様に非水電解質二次電池を作製した。
負極活物質として比表面積1.0m2/gのMCMBのみを用いて負極を作製した(内周部塗布面積(SA)/外周部塗布面積(SB)= 10.0/0)以外は実施例1と同様に非水電解質二次電池を作製した。
負極活物質として比表面積3.5m2/gの鱗片状天然黒鉛のみを用いて負極を作製した(内周部塗布面積(SA)/外周部塗布面積(SB)=0/10.0)以外は実施例1と同様に非水電解質二次電池を作製した。
2 外周部
3 集電体
4 タブ
5 電池缶
Claims (4)
- 負極および正極をセパレータを介して積層し、捲回した電池要素を外装体に収納した非水電解質二次電池において、負極活物質が前記負極の内周部と外周部で異なる材料からなることを特徴とする非水電解質二次電池。
- 前記負極活物質が前記負極の内周部と外周部で異なる炭素材料からなることを特徴とする請求項1に記載の非水電解質二次電池。
- 前記負極活物質が前記負極の内周部で人造黒鉛、前記負極の外周部で天然黒鉛からなることを特徴とする請求項2に記載の非水電解質二次電池。
- 前記負極の内周部と外周部の塗布面積の割合が、内周部塗布面積(SA)/外周部塗布面積(SB)=4.5/5.5〜6.0/4.0であ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。
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022024712A1 (ja) * | 2020-07-31 | 2022-02-03 | 三洋電機株式会社 | 非水電解質二次電池 |
WO2022190895A1 (ja) * | 2021-03-08 | 2022-09-15 | 三洋電機株式会社 | 非水電解質二次電池 |
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JPH1064515A (ja) * | 1996-08-20 | 1998-03-06 | Shin Kobe Electric Mach Co Ltd | リチウムイオン二次電池 |
JPH11250898A (ja) * | 1998-03-03 | 1999-09-17 | Hitachi Maxell Ltd | 有機電解液二次電池 |
JP3283805B2 (ja) * | 1997-10-14 | 2002-05-20 | 日本碍子株式会社 | リチウム二次電池 |
JP2006012703A (ja) * | 2004-06-29 | 2006-01-12 | Shin Kobe Electric Mach Co Ltd | 二次電池 |
JP2007149441A (ja) * | 2005-11-25 | 2007-06-14 | Toyota Motor Corp | 捲回型蓄電装置 |
JP2007191389A (ja) * | 2007-01-29 | 2007-08-02 | Mitsubishi Chemicals Corp | 炭素質あるいは黒鉛質粒子 |
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2007
- 2007-09-12 JP JP2007236935A patent/JP5278989B2/ja not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH1064515A (ja) * | 1996-08-20 | 1998-03-06 | Shin Kobe Electric Mach Co Ltd | リチウムイオン二次電池 |
JP3283805B2 (ja) * | 1997-10-14 | 2002-05-20 | 日本碍子株式会社 | リチウム二次電池 |
JPH11250898A (ja) * | 1998-03-03 | 1999-09-17 | Hitachi Maxell Ltd | 有機電解液二次電池 |
JP2006012703A (ja) * | 2004-06-29 | 2006-01-12 | Shin Kobe Electric Mach Co Ltd | 二次電池 |
JP2007149441A (ja) * | 2005-11-25 | 2007-06-14 | Toyota Motor Corp | 捲回型蓄電装置 |
JP2007191389A (ja) * | 2007-01-29 | 2007-08-02 | Mitsubishi Chemicals Corp | 炭素質あるいは黒鉛質粒子 |
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WO2022024712A1 (ja) * | 2020-07-31 | 2022-02-03 | 三洋電機株式会社 | 非水電解質二次電池 |
WO2022190895A1 (ja) * | 2021-03-08 | 2022-09-15 | 三洋電機株式会社 | 非水電解質二次電池 |
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