JP4830262B2 - 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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- JP4830262B2 JP4830262B2 JP2004120170A JP2004120170A JP4830262B2 JP 4830262 B2 JP4830262 B2 JP 4830262B2 JP 2004120170 A JP2004120170 A JP 2004120170A JP 2004120170 A JP2004120170 A JP 2004120170A JP 4830262 B2 JP4830262 B2 JP 4830262B2
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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
-
- 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
Description
に活物質を含む合剤を部分的に塗布してなり、正極の集電体露呈部と負極の合剤塗布部とがセパレータを介して対向する部分を有する構成である非水電解液二次電池において、前記セパレータは表面の一部に耐熱層が設けられており、前記正極の集電体露呈部と負極の合剤塗布部とが対向する部分に前記耐熱層が位置していることを特徴とし、さらに前記耐熱層が、セラミック粉末を含有する多孔質薄膜層、耐熱性樹脂の多孔質薄膜層、またはセラミック粉末と耐熱性樹脂の複合体からなる多孔質薄膜層であり、前記耐熱層は、前記正極の集電体露呈部に連続する正極合剤層の端部まで含めて覆っていることを特徴とする。
本発明における非水電解液二次電池用セパレータは、図1に示すように、耐熱層1aと多孔質ポリオレフィン層2aとからなり、耐熱層が、正極の集電体露呈部と負極の合剤塗布部とが対向する部位3に介在する多孔質ポリオレフィン層上に形成された構造を持つ。
に塗布したのち脱溶媒処理することでセラミック粉末を含有する多孔質薄膜層を作製する。結着剤としては、ポリフッ化ビニリデン(PVdF)、ポリ4フッ化エチレン(PTFE)、スチレンブタジエンゴム(SBR)、ポリアクリル酸誘導体ゴムバインダーなどを用いることができる。
図1の構成を持つ非水電解液二次電池用セパレータを以下の手順で作成した。耐熱層としては、アルミナ粉末と結着剤であるPVdFからなる多孔質薄膜を用いた。
としてアセチレンブラック(AB)粉末を10g、結着剤としてPVdF(呉羽化学(株)社製、#1320)のディスパージョン6g(固形分換算で)を十分混合したのち、NMPを適量加え、十分混合してペースト状にし、集電体である厚み20μmのアルミニウム箔の両面に、極板群の最外周部に相当する端部に長さ70mmの露呈部が残るようにして塗布し、乾燥、圧延して厚み200μmの正極を得た。
多孔質薄膜層中のセラミック粉末として、分級して平均粒径0.5μmとしたチタニア粉末(富士チタン工業(株)社製)を用い、実施例1と同様にして非水電解液二次電池用セパレータを作製した。耐熱層塗布部分の厚みは26μmであった。このセパレータを用いたこと以外は実施例1と同様にして、円筒電池を作製した。
図1の構成を持つ非水電解液二次電池用セパレータを以下の手順で作製した。耐熱層としては、以下の手順で作製したポリイミド樹脂からなる多孔質薄膜を用いた。
図1の構成を持つ非水電解液二次電池用セパレータを以下の手順で作製した。耐熱層としては、以下の手順で作製したアラミド樹脂、具体的にはポリパラフェニレンテレフタルアミド(PPTA)からなる多孔質薄膜を用いた。
耐熱層として、ポリイミド樹脂からなる厚み25μm、幅2cmの粘着性フィルム(日東電工(株)社製、No.360UL)を用い、実施例1と同様の位置に貼り付けて非水電解液二次電池用セパレータを得た。このセパレータを用いたこと以外は実施例1と同構成の円筒方電池を作製した。
第1の比較例として、耐熱層を塗布していない厚み20μmの多孔質ポリエチレン薄膜(東燃化学(株)社製、E20MMS)をセパレータとして用いたこと以外は実施例1と同構成の円筒型電池を作製した。
第2の比較例として、ポリイミド樹脂による耐熱性多孔質薄膜層を、厚み16μmの多孔質ポリエチレン薄膜(東燃化学(株)社製、E16MMS)の片面全部に塗布したセパレータ(総厚み22μm)を用い、極板群の体積が大きくなる分を正負極の合剤塗布部分を長手方向に短縮することで調整したこと以外は実施例3と同構成の円筒型電池を作製した。
2a,2b 多孔質ポリオレフィン層
3 正極集電体と負極合剤との対向部位
4 正極集電体
5 正極合剤
6 負極集電体
7 負極合剤
Claims (1)
- リチウム複合酸化物を活物質とする正極とリチウムを吸蔵放出可能な合金および/または炭素材料を活物質とする負極とセパレータとを重ねて巻回した極板群を有し、前記正極は集電体表面に活物質を含む合剤を部分的に塗布してなり、正極の集電体露呈部と負極の合剤塗布部とがセパレータを介して対向する部分を有する構成であり、前記セパレータは表面の一部に耐熱層が設けられており、前記正極の集電体露呈部と負極の合剤塗布部とが対向する部分に前記耐熱層が位置している非水電解液二次電池において、前記耐熱層が、セラミック粉末を含有する多孔質薄膜層、耐熱性樹脂の多孔質薄膜層、またはセラミック粉末と耐熱性樹脂の複合体からなる多孔質薄膜層であり、前記耐熱層は、前記正極の集電体露呈部に連続する正極合剤層の端部まで含めて覆っていることを特徴とする非水電解液二次電池。
Priority Applications (1)
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JP2004120170A JP4830262B2 (ja) | 2004-04-15 | 2004-04-15 | 非水電解液二次電池 |
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JP2004120170A JP4830262B2 (ja) | 2004-04-15 | 2004-04-15 | 非水電解液二次電池 |
Publications (2)
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JP2005302634A JP2005302634A (ja) | 2005-10-27 |
JP4830262B2 true JP4830262B2 (ja) | 2011-12-07 |
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JP2004120170A Expired - Lifetime JP4830262B2 (ja) | 2004-04-15 | 2004-04-15 | 非水電解液二次電池 |
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Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE602005013086D1 (de) * | 2004-12-13 | 2009-04-16 | Panasonic Corp | Lithiumionen-sekundärbatterie |
JP5400268B2 (ja) | 2006-01-26 | 2014-01-29 | パナソニック株式会社 | リチウム二次電池 |
JP5095121B2 (ja) | 2006-04-28 | 2012-12-12 | パナソニック株式会社 | 非水電解質二次電池用セパレータおよび非水電解質二次電池 |
JP5055865B2 (ja) | 2006-07-19 | 2012-10-24 | パナソニック株式会社 | リチウムイオン二次電池 |
JP5209896B2 (ja) | 2007-04-24 | 2013-06-12 | パナソニック株式会社 | 電池の内部短絡安全性評価方法 |
JP5906698B2 (ja) * | 2011-12-01 | 2016-04-20 | 株式会社Gsユアサ | 非水電解質二次電池 |
CN104170151B (zh) * | 2012-05-23 | 2018-02-02 | 株式会社Lg 化学 | 电极组件的制造方法及包括由该方法制造的电极组件的电化学元件 |
WO2017015535A1 (en) * | 2015-07-22 | 2017-01-26 | Celgard, Llc | Improved membranes, separators, batteries, and methods |
CN108352480B (zh) | 2015-07-31 | 2022-06-24 | 赛尔格有限责任公司 | 改进的层压多层膜、隔板、电池、和方法 |
KR101660210B1 (ko) * | 2015-11-30 | 2016-10-10 | 스미또모 가가꾸 가부시키가이샤 | 비수 전해액 이차 전지용 적층 세퍼레이터, 비수 전해액 이차 전지용 부재 및 비수 전해액 이차 전지 |
KR102613190B1 (ko) * | 2018-05-29 | 2023-12-14 | 현대자동차주식회사 | 리튬 이차전지용 전해액 및 이를 포함하는 리튬 이차전지 |
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JP4413294B2 (ja) * | 1998-10-06 | 2010-02-10 | 株式会社東芝 | アルカリ二次電池 |
JP2001155779A (ja) * | 1999-11-30 | 2001-06-08 | Sanyo Electric Co Ltd | 非水電解質電池 |
JP4177612B2 (ja) * | 2002-07-30 | 2008-11-05 | 株式会社東芝 | リチウムイオン二次電池 |
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2004
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