JP5622627B2 - リチウム二次電池 - Google Patents
リチウム二次電池 Download PDFInfo
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- JP5622627B2 JP5622627B2 JP2011063553A JP2011063553A JP5622627B2 JP 5622627 B2 JP5622627 B2 JP 5622627B2 JP 2011063553 A JP2011063553 A JP 2011063553A JP 2011063553 A JP2011063553 A JP 2011063553A JP 5622627 B2 JP5622627 B2 JP 5622627B2
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- 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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Description
(前記化学式(1)において、DはAl、Ni、Co、Mn、Cr、Fe、Mg、Sr、V、希土類元素、およびこれらの組み合わせからなる群より選択され、JはF、S、P、およびこれらの組み合わせからなる群より選択され、0.90≦a≦1.8、0≦b≦0.5、0≦c≦0.05である)
(前記化学式(2)において、LはAl、Cr、Mn、Fe、Mg、La、Ce、Sr、V、およびこれらの組み合わせからなる群より選択され、0.90≦a≦1.8、0<b≦0.9、0≦c≦0.5、0≦d≦0.5、0.001≦e≦0.1である)
(上記化学式(1)において、DはAl、Ni、Co、Mn、Cr、Fe、Mg、Sr、V、希土類元素、およびこれらの組み合わせからなる群より選択され、JはF、S、P、およびこれらの組み合わせからなる群より選択され、0.90≦a≦1.8、0≦b≦0.5、0≦c≦0.05である)
(上記化学式(2)において、LはAl、Cr、Mn、Fe、Mg、La、Ce、Sr、V、およびこれらの組み合わせからなる群より選択され、0.90≦a≦1.8、0<b≦0.9、0≦c≦0.5、0≦d≦0.5、0.001≦e≦0.1である)
(マンガンイオン吸着の評価1;pH測定)
気孔が形成されないカーボンブラック(CB)と、下記表1に示す物性を有する、気孔分布が異なる3つの活性炭Cmi、Cme、Cmaを0.5molのMn(NO3)2水溶液に12時間浸漬した後、初期、1時間後、および12時間後のpHをそれぞれ測定し、その結果を図2に示した。
(マンガンイオン吸着の評価2;抵抗測定)
上記実験例1で用いられた、気孔が形成されないカーボンブラック(CB)および気孔が相違する3つ活性炭Cmi、Cme、Cmaを0.5molのMn(NO3)2溶液に1重量%の含量でそれぞれ投入し、得られた活性炭液を12時間攪拌した後、1時間後および12時間後の活性炭液の抵抗を白金電極(Metrohm社)を用いて抵抗測定器(HIOKI社)で測定した。測定された抵抗値を0.5molのMn(NO3)2溶液の抵抗に対する相対抵抗比(実験後に変化した抵抗値/0.5molのMn(NO3)2溶液の抵抗)で計算し、その結果を図3に示した。
(熱重量分析)
上記実験例1で用いられた気孔が形成されないカーボンブラック(CB)およびメソポアが形成された活性炭Cmeと、ポリビニリデンフルオライドとの熱重量分析(TGA)をTGA−DSC装置を用いて実施し、その結果を図4に示した。熱重量分析実験は試料を5℃/minの加熱速度で昇温させながら、空気を吹き込む条件で重量変化を測定して実施した。
以下、実施例で用いる活性炭Cmi、Cme、およびCmaは、上記実験例で用いられた表1に示す物性を有する。
LiMn2O4正極活物質90重量%、ポリビニリデンフルオライドバインダー5重量%、カーボンブラック導電材(super−P)3重量%、およびマイクロポアが発達した活性炭Cmi2重量%をM−メチルピロリドン(NMP)溶媒中で混合して正極活物質スラリーを製造した。
マイクロポアが発達した活性炭Cmiの代わりに、活性炭Cmiとメソポアが発達した活性炭Cmeを8:2の体積比で混合して用いたことを除いては、上記実施例1と同じように実施してリチウム二次電池を製造した。
マイクロポアが発達した活性炭Cmiの代わりに、活性炭Cmiと活性炭Cmeを5:5の体積比で混合して用いたことを除いては、上記実施例1と同じように実施してリチウム二次電池を製造した。
マイクロポアが発達した活性炭Cmiの代わりに、活性炭Cmiと活性炭Cmeを2:8の体積比で混合して用いたことを除いては、上記実施例1と同じように実施してリチウム二次電池を製造した。
マイクロポアが発達した活性炭Cmiの使用量を0.1重量%に変更し、カーボンブラック導電材の使用量を4.9重量%に変更したことを除いては、上記実施例1と同じように実施してリチウム二次電池を製造した。
マイクロポアが発達した活性炭Cmiの使用量を3重量%に変更し、カーボンブラック導電材の使用量を2重量%に変更したことを除いては、上記実施例1と同じように実施してリチウム二次電池を製造した。
LiMn2O4正極活物質92重量%、ポリビニリデンフルオライドバインダー5重量%、およびカーボンブラック導電材(super−P)3重量%をN−メチルピロリドン(NMP)溶媒中で混合して正極活物質スラリーを製造した。
マイクロポアが適切に発達した活性炭Cmiの代わりに、マクロポアが形成された活性炭Cmaを用いたことを除いては、上記実施例1と同じように実施してリチウム二次電池を製造した。
上記実施例1〜6、比較例1、および参考例1のリチウム二次電池のサイクル寿命特性を測定し、その結果を下記表2および表3に示した。サイクル寿命特性は45℃で1Cによって200回充放電を実施した後、結果は1回サイクル時の放電容量に対する200回サイクル時の放電容量の比で示した。
2 負極
3 セパレータ
4 正極
5 電池ケース
6 封入部材
Claims (7)
- マンガン系正極活物質、バインダー、導電材および活性炭が混合されて成り、前記活性炭はマイクロポア及びメソポアを体積比90:10〜50:50で含み、マクロポアを含まないか、含むとしてもその量が前記活性炭の全気孔体積に対して10体積%以下であり、ここで、前記マイクロポアの大きさは5Å〜20Åであり、前記メソポアの大きさは20Å超500Å以下であり、前記マクロポアの大きさは500Å超である、正極活物質層を含み、前記活性炭の含量は前記正極活物質層の全体重量に対して0.1重量%〜3重量%の正極;
負極活物質を含む負極;および
電解質;
を含む、リチウム二次電池。 - 前記活性炭は比表面積が1,000m2/g以上である、請求項1に記載のリチウム二次電池。
- 前記活性炭は比表面積が1,000m2/g〜2,500m2/gである、請求項2に記載のリチウム二次電池。
- 前記活性炭の含量は前記正極活物質層の全体重量に対して0.1〜2重量%である、請求項1から3のいずれか1項に記載のリチウム二次電池。
- 前記活性炭は非晶質炭素である、請求項1から4のいずれか1項に記載のリチウム二次電池。
- 前記活性炭は、1℃/分〜10℃/分の昇温速度で熱処理したとき、600℃以下で酸化分解が始まる、請求項1から5のいずれか1項に記載のリチウム二次電池。
- 前記マンガン系正極活物質は、下記化学式(1)および(2)で表される化合物およびこれらの組み合わせからなる群より選択される化合物を含む、請求項1から6のいずれか1項に記載のリチウム二次電池。
LiaMn2−bDbO4−cJc・・・(1)
(前記化学式(1)において、
DはAl、Ni、Co、Mn、Cr、Fe、Mg、Sr、V、希土類元素、およびこれらの組み合わせからなる群より選択され、
JはF、S、P、およびこれらの組み合わせからなる群より選択され、
0.90≦a≦1.8、0≦b≦0.5、0≦c≦0.05である)
LiaMnbCocNidLeO2・・・(2)
(前記化学式(2)において、
LはAl、Cr、Mn、Fe、Mg、La、Ce、Sr、V、およびこれらの組み合わせからなる群より選択され、
0.90≦a≦1.8、0<b≦0.9、0≦c≦0.5、0≦d≦0.5、0.001≦e≦0.1である)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR1020100089564A KR101155915B1 (ko) | 2010-09-13 | 2010-09-13 | 리튬 이차 전지 |
KR10-2010-0089564 | 2010-09-13 |
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JP2012059690A JP2012059690A (ja) | 2012-03-22 |
JP5622627B2 true JP5622627B2 (ja) | 2014-11-12 |
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US (1) | US9252422B2 (ja) |
EP (1) | EP2429020A1 (ja) |
JP (1) | JP5622627B2 (ja) |
KR (1) | KR101155915B1 (ja) |
CN (1) | CN102403493B (ja) |
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JP6102916B2 (ja) * | 2012-03-30 | 2017-03-29 | 日本電気株式会社 | リチウムイオン二次電池 |
KR101502657B1 (ko) * | 2012-05-10 | 2015-03-13 | 주식회사 엘지화학 | 고출력 이차전지용 양극 활물질 |
US20140120410A1 (en) * | 2012-11-01 | 2014-05-01 | Samsung Sdi Co., Ltd. | Positive electrode for rechargeable lithium battery and rechargeable lithium battery including same |
JP5771810B2 (ja) | 2012-11-09 | 2015-09-02 | エス・イー・アイ株式会社 | リチウム二次電池用電極およびリチウム二次電池 |
JPWO2014077375A1 (ja) * | 2012-11-19 | 2017-01-05 | 近藤 耀子 | ナノカーボン二次電池 |
CN102983355A (zh) * | 2012-12-25 | 2013-03-20 | 天津市捷威动力工业有限公司 | 一种可大倍率充放电的锂离子电池及其制备方法 |
US10224538B2 (en) * | 2013-01-16 | 2019-03-05 | Samsung Sdi Co., Ltd. | Positive electrode for rechargeable lithium battery and rechargeable lithium battery including the same |
FR3003077B1 (fr) | 2013-03-08 | 2016-08-05 | Accumulateurs Fixes | Supercondensateur asymetrique a electrolyte alcalin comportant une electrode negative tridimensionnelle et son procede de fabrication |
US11253839B2 (en) | 2014-04-29 | 2022-02-22 | Archer-Daniels-Midland Company | Shaped porous carbon products |
FI3878552T3 (fi) | 2014-04-29 | 2023-04-25 | Archer Daniels Midland Co | Prosessi aldoosin selektiivistä hapettumista varten |
EP3037473B1 (en) | 2014-12-24 | 2017-11-08 | Solvay SA | Compositions comprising vinylidene fluoride polymers and adsorbent carbon materials |
WO2016160703A1 (en) | 2015-03-27 | 2016-10-06 | Harrup Mason K | All-inorganic solvents for electrolytes |
US10464048B2 (en) | 2015-10-28 | 2019-11-05 | Archer-Daniels-Midland Company | Porous shaped metal-carbon products |
US10722867B2 (en) | 2015-10-28 | 2020-07-28 | Archer-Daniels-Midland Company | Porous shaped carbon products |
JP6304198B2 (ja) * | 2015-11-04 | 2018-04-04 | トヨタ自動車株式会社 | 非水電解液二次電池および非水電解液二次電池の製造方法 |
MY195773A (en) * | 2016-05-20 | 2023-02-11 | Kyocera Avx Components Corp | Multi-Cell Ultracapacitor |
US10707531B1 (en) | 2016-09-27 | 2020-07-07 | New Dominion Enterprises Inc. | All-inorganic solvents for electrolytes |
US11862765B2 (en) * | 2017-03-08 | 2024-01-02 | The School Corporation Kansai University | Electrolyte solution for alkali metal-sulfur-based secondary battery, and alkali metal-sulfur-based secondary battery |
CN107230783A (zh) * | 2017-06-01 | 2017-10-03 | 金华科源电子电器有限公司 | 新型锂离子电池 |
KR102151074B1 (ko) * | 2018-12-06 | 2020-09-02 | 삼화콘덴서공업 주식회사 | 이차전지 |
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JP2008112595A (ja) | 2006-10-30 | 2008-05-15 | Hitachi Vehicle Energy Ltd | リチウム二次電池 |
JP2008112594A (ja) * | 2006-10-30 | 2008-05-15 | Hitachi Vehicle Energy Ltd | リチウム二次電池 |
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KR101477802B1 (ko) * | 2008-02-05 | 2014-12-31 | 지에스칼텍스 주식회사 | 전극용 활성탄, 그의 제조방법 및 상기 활성탄을 포함하는연수기 |
JP5228531B2 (ja) | 2008-02-27 | 2013-07-03 | 日本電気株式会社 | 蓄電デバイス |
JP5235715B2 (ja) | 2009-02-25 | 2013-07-10 | 富士重工業株式会社 | 蓄電デバイスおよびその製造方法 |
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KR101155915B1 (ko) | 2012-06-20 |
US20120064398A1 (en) | 2012-03-15 |
KR20120027780A (ko) | 2012-03-22 |
CN102403493B (zh) | 2014-12-10 |
JP2012059690A (ja) | 2012-03-22 |
EP2429020A1 (en) | 2012-03-14 |
US9252422B2 (en) | 2016-02-02 |
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