JP4198658B2 - 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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Description
リチウムコバルト酸化物(Li2CoO2)粉末90重量%、導電剤としてカーボンブラックをアルゴン雰囲気下で1400℃(DBP給油量200ml/0.1kg)、48h焼成して得た炭素質物2重量%、グラファイト3重量%、バインダーとしてポリフッ化ビニリデン5重量%を、N−メチルピロリドンを溶媒として混合・撹拌によりスラリー化し、厚さ20μmのアルミニウム箔上に塗布、乾燥後、圧延した。得られた正極シートを直径15mmの円形に切出し、正極1を作成した。正極1の活物質量は7.91mgであった。
正極と負極の活物質量がそれぞれ7.91mgと6.29mgであったことから正負極放電容量比が1.052となり、テトラフルオロホウ酸1−エチル−3−メチルイミダゾリウム(EMI・BF4)に2.0モル/Lのテトラフルオロホウ酸リチウム(LiBF4)を溶かした電解質を調製した。リチウム塩モル数/溶融塩モル数比は0.34となった以外は実施例1と同様にして非水電解質二次電池を作製した。
正極と負極の活物質量がそれぞれ7.92mgと6.30mgであったことから正負極放電容量比が1.051となり、テトラフルオロホウ酸1−エチル−3−メチルイミダゾリウム(EMI・BF4)に2.5モル/Lのテトラフルオロホウ酸リチウム(LiBF4)を溶かした電解質を調製した。リチウム塩モル数/溶融塩モル数比は0.44となった以外は実施例1と同様にして非水電解質二次電池を作製した。
正極と負極の活物質量がそれぞれ7.93mgと6.31mgであったことから正負極放電容量比が1.051となり、1−エチル−3−メチルイミダゾリウムビストリフルオロメタンスルホニル(EMI・TFSI)に1.0モル/Lのビストリフルオロメタンスルホニルリチウム(LiTFSI)を溶かした電解質を調製した。リチウム塩モル数/溶融塩モル数比は0.30となった以外は実施例1と同様にして非水電解質二次電池を作製した。
正極と負極の活物質量がそれぞれ8.13mgと6.29mgであったことから正負極放電容量比が1.081となり、テトラフルオロホウ酸1−エチル−3−メチルイミダゾリウム(EMI・BF4)に2.0モル/Lのテトラフルオロホウ酸リチウム(LiBF4)を溶かした電解質を調製した。リチウム塩モル数/溶融塩モル数比は0.34となった以外は実施例1と同様にして非水電解質二次電池を作製した。
正極と負極の活物質量がそれぞれ7.92mgと6.31mgであったことから正負極放電容量比が1.050となり、テトラフルオロホウ酸1−エチル−3−メチルイミダゾリウム(EMI・BF4)に0.5モル/Lのテトラフルオロホウ酸リチウム(LiBF4)を溶かした電解質を調製した。リチウム塩モル数/溶融塩モル数比は0.08となった以外は実施例1と同様にして非水電解質二次電池を作製した。
正極と負極の活物質量がそれぞれ7.91mgと6.29mgであったことから正負極放電容量比が1.052となり、テトラフルオロホウ酸1−エチル−3−メチルイミダゾリウム(EMI・BF4)に3.0モル/Lのテトラフルオロホウ酸リチウム(LiBF4)を溶かした電解質を調製した。リチウム塩モル数/溶融塩モル数比は0.55となった以外は実施例1と同様にして非水電解質二次電池を作製した。
正極と負極の活物質量がそれぞれ7.91mgと6.29mgであったことから正負極放電容量比が1.052となり、1−エチル−3−メチルイミダゾリウムビストリフルオロメタンスルホニル(EMI・TFSI)に0.5モル/Lのビストリフルオロメタンスルホニルリチウム(LiTFSI)を溶かした電解質を調製した。リチウム塩モル数/溶融塩モル数比は0.14となった以外は実施例1と同様にして非水電解質二次電池を作製した。
正極と負極の活物質量がそれぞれ7.17mgと6.31mgであったことから正負極放電容量比が0.950となった以外は実施例2と同様にして非水電解質二次電池を作製した。
正極と負極の活物質量がそれぞれ8.68mgと6.30mgであったことから正負極放電容量比が1.152となった以外は実施例2と同様にして非水電解質二次電池を作製した。
2・・・負極
3・・・セパレータ
4・・・コイン型電池容器(下部)
5・・・コイン型電池容器(上部)
6・・・ガスケット
Claims (4)
- リチウムを含有もしくは吸蔵放出する負極と、コバルト、マンガン、ニッケルの少なくともひとつを含むリチウム複合酸化物を含有する正極と、リチウム塩を含有する溶融塩電解質とを具備する非水電解質二次電池において、
前記負極は負極活物質としてLi 4/3 Ti 5/3 O 4 含む負極であり、
前記リチウム塩はテトラフルオロホウ酸リチウム、ヘキサフルオロリン酸リチウム、ヘキサフルオロメタンスルホン酸リチウム、ビストリフルオロメタンスルホニルアミドリチウム、ジシアナミドリチウム、ビスペンタフルオロエタンスルホニルアミドアニオンの群から選択される少なくとも1種を含むリチウム塩であり、
前記溶融塩はカチオンに1−エチル−3−メチルイミダゾリウム、1−メチル−3−プロピルイミダゾリウム、1−メチル−3−イソプロピルイミダゾリウム、1−ブチル−3−メチルイミダゾリウム、1−エチル−2,3−ジメチルイミダゾリウム、1−エチル−3,4−ジメチルイミダゾリウム、N−プロピルピリジニウム、N−ブチルピリジニウム、N−tert−ブチルピリジニウム、N−tert−ペンチルピリジニウム、N−ブチル−N,N,N−トリメチルアンモニウム、N−エチル−N,N−ジメチル−N−プロピルアンモニウム、N−ブチル−N−エチル−N,N−ジメチルアンモニウム、N−ブチル−N,N−ジメチル−N−プロピルアンモニウム、N−メチル−N−プロピルピロリジニウムイオン、N−ブチル−N−メチルピロリジニウムイオン、N−メチル−N−ペンチルピロリジニウム、N−プロポキシエチル−N−メチルピロリジニウム、N−メチル−N−プロピルピペリジニウム、N−メチル−N−イソプロピルピペリジニウム、N−ブチル−N−メチルピペリジニウム、N−イソブチル−N−メチルピペリジニウム、N−sec−ブチル−N−メチルピペリジニウム、N−メトキシエチル−N−メチルピペリジニウム、N−エトキシエチル−N−メチルピペリジニウムの群から選択される少なくとも1種を含む溶融塩、または テトラフルオロホウ酸1−エチル−3−メチルイミダゾリウムまたは1−エチル−3−メチルイミダゾリウムビストリフルオロメタンスルホニルを含む溶融塩であり、
前記溶融塩電解質中のリチウム塩モル数/溶融塩モル数比が0.3以上0.5以下であり、前記正極の放電容量が前記負極の放電容量の1.05倍以上であることを特徴とする非水電解質二次電池。 - 前記溶融塩電解質が、フッ素を含むアニオンとイミダゾリウム骨格を有するカチオンからなる溶融塩と、リチウム塩と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。
- 前記正負極を隔てるセパレータが、ポリオレフィンもしくはポリエステルからなる空隙率70%以上のセパレータであ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。
- 前記正極、前記負極の少なくとも一方に、DBP給油量が180ml/0.1kg以上である炭素質物を導電助材として含有す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。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004278280A JP4198658B2 (ja) | 2004-09-24 | 2004-09-24 | 非水電解質二次電池 |
| US11/179,585 US7883797B2 (en) | 2004-09-24 | 2005-07-13 | Non-aqueous electrolyte battery |
| CNB2005101075167A CN100511815C (zh) | 2004-09-24 | 2005-09-23 | 非水电解质电池 |
| KR1020050088670A KR100837450B1 (ko) | 2004-09-24 | 2005-09-23 | 비수성 전해질 전지 |
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| JP2004278280A JP4198658B2 (ja) | 2004-09-24 | 2004-09-24 | 非水電解質二次電池 |
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| Publication Number | Publication Date |
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| JP2006092974A JP2006092974A (ja) | 2006-04-06 |
| JP4198658B2 true JP4198658B2 (ja) | 2008-12-17 |
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|---|---|
| US (1) | US7883797B2 (ja) |
| JP (1) | JP4198658B2 (ja) |
| KR (1) | KR100837450B1 (ja) |
| CN (1) | CN100511815C (ja) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1494303A3 (en) * | 2003-04-25 | 2007-07-18 | Nec Tokin Corporation | Electrode for electrochemical cell and electrochemical cell therewith |
| JP4159954B2 (ja) | 2003-09-24 | 2008-10-01 | 株式会社東芝 | 非水電解質電池 |
| US7582380B1 (en) * | 2004-04-08 | 2009-09-01 | Electrochemical Systems, Inc. | Lithium-ion cell with a wide operating temperature range |
| US7267908B2 (en) * | 2004-08-30 | 2007-09-11 | Toyota Technical Center Usa, Inc. | In cycling stability of Li-ion battery with molten salt electrolyte |
| US7927742B2 (en) | 2004-10-29 | 2011-04-19 | Medtronic, Inc. | Negative-limited lithium-ion battery |
| US8105714B2 (en) * | 2004-10-29 | 2012-01-31 | Medtronic, Inc. | Lithium-ion battery |
| US7682745B2 (en) * | 2004-10-29 | 2010-03-23 | Medtronic, Inc. | Medical device having lithium-ion battery |
| US9077022B2 (en) | 2004-10-29 | 2015-07-07 | Medtronic, Inc. | Lithium-ion battery |
| US7563541B2 (en) * | 2004-10-29 | 2009-07-21 | Medtronic, Inc. | Lithium-ion battery |
| CN101048898B (zh) * | 2004-10-29 | 2012-02-01 | 麦德托尼克公司 | 锂离子电池及医疗装置 |
| US8980453B2 (en) | 2008-04-30 | 2015-03-17 | Medtronic, Inc. | Formation process for lithium-ion batteries |
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| Publication number | Publication date |
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| CN100511815C (zh) | 2009-07-08 |
| JP2006092974A (ja) | 2006-04-06 |
| US7883797B2 (en) | 2011-02-08 |
| KR100837450B1 (ko) | 2008-06-12 |
| US20060068282A1 (en) | 2006-03-30 |
| KR20060051575A (ko) | 2006-05-19 |
| CN1753233A (zh) | 2006-03-29 |
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