JP2005183384A - リチウム充電式電気化学的電池の正極用の電気化学的活物質 - Google Patents
リチウム充電式電気化学的電池の正極用の電気化学的活物質 Download PDFInfo
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Abstract
【解決手段】本発明は、電気化学的活物質が、
I)リチウムと、Mg、Al、B、Ti、Si、Zr、Fe、Zn、およびCuから選択された1種の元素によって置換されてもいる、NiおよびCoから選択された少なくとも1種の遷移金属との複合酸化物と、
II)リン、リチウム、および少なくとも1種の遷移金属からの一般式LitM2 zPO4(式中、0≦t≦3、およびz=1または2)の複合酸化物との混合物を含むこと、ならびにリン、リチウム、および少なくとも1種の遷移金属からの前記複合酸化物の含有量が前記混合物の重量の1%から50%の範囲にあることを特徴とする、液状電解質および正極用の前記活物質を含むリチウム充電式電気化学的電池を提供する。
【選択図】なし
Description
I)リチウムと、Mg、Al、B、Ti、Si、Zr、Fe、Zn、およびCuから選択された1種の元素によって置換されてもいる、NiおよびCoから選択された少なくとも1種の遷移金属との複合酸化物と、
II)リン、リチウム、および少なくとも1種の遷移金属からの一般式LitM2 zPO4(式中、0≦t≦3、およびz=1または2)の複合酸化物との混合物を含むこと、ならびにリン、リチウム、および少なくとも1種の遷移金属からの前記複合酸化物の含有量が前記混合物の重量の1%から50%の範囲にあることを特徴とする、液状電解質および正極用の前記電気化学的活物質を含むリチウム充電式電気化学的電池を提供する。
図1は、ボタン型電気化学的電池の概略断面図である。
正極を次の様に調製した。86重量%の電気化学的活物質と、6重量%の結合剤、好ましくはポリフッ化ビニリデン(PVdF)と、8重量%の炭素含有導電性物質、好ましくは4重量%のすすと4重量%の黒鉛でできている混合物とを混合することにより、ペーストを調製した。N−メチルピロリドン(NMP)を使って、ペーストの粘度を調整した。その結果得られたペーストを、電極の導電性支持物の役目をするアルミ箔の上に置いた。それから、その電極を140℃で1時間乾燥し、次いでカレンダーにかけた。
正極の活物質の電気化学的容量を評価する目的のために、金属リチウムで作られた負極を有するボタン型充電式電気化学的電池(図1)と、
電池の酷使的な過充電試験中の熱挙動を特徴づけるために、主として黒鉛で構成された負極を含む4/5A型の円筒状充電式電気化学的電池(図4)である。
ボタン型電気化学的電池10を図1に示す。それは、金属リチウムの薄板によって構成された負極12に面する正極11から成っている。正極と負極、11と12が、「CELGARD」という名前で供給者「CELANESE」によって販売されたポリエチレン(PE)の膜によって構成された隔離板13の相対する面上にある。こうして得られた電気化学的対を、ガスケット16を媒介としてカバー15により密封するように閉じられたカップ14の中に入れた。その電気化学的対を、容積比が1:1:3の炭酸プロピレン、炭酸エチレン、および炭酸ジメチル(PC/EC/DMC)の混合物から成り、さらに、1モル(M)濃度のヘキサフルオロリン酸リチウムLiPF6であるリチウム塩を含む電解質の中に含浸させた。湿気の無いアルゴン雰囲気下のグローブ・ボックスの中で、その電池を組み立て、電解質で満たした。
リチウム、ニッケル、およびアルミニウムで置換されたコバルトの複合酸化物LiNi0.80Co0.15Al0.05O2が80重量%と、リン、リチウム、および鉄の複合酸化物LiFePO4が20重量%との混合物でできている本発明の活物質を含む正極を含むリチウム充電式電池の過充電に耐える能力について、評価を行った。比較のために、従来技術の活物質を含む正極を有するリチウム充電式電池の過充電に耐える能力も評価した。
Claims (14)
- 電気化学的活物質が、
I)リチウムと、Mg、Al、B、Ti、Si、Zr、Fe、Zn、およびCuから選択された1種の元素によって置換されてもいる、NiおよびCoから選択された少なくとも1種の遷移金属との複合酸化物と、
II)リン、リチウム、および少なくとも1種の遷移金属からの一般式LitM2 zPO4(式中、0≦t≦3、およびz=1または2)の複合酸化物との混合物を含むこと、ならびにリン、リチウム、および少なくとも1種の遷移金属からの前記複合酸化物の含有量が前記混合物の重量の1%から50%の範囲にあることを特徴とする、液体電解質および正極用の前記電気化学的活物質を含むリチウム充電式電気化学的電池。 - リン、リチウム、および少なくとも1種の遷移金属の複合酸化物の含有量が前記混合物の重量で1%から30%の範囲にある請求項1に記載の電池。
- リン、リチウム、および少なくとも1種の遷移金属の複合酸化物の含有量が前記混合物の重量で5%から30%の範囲にある請求項1に記載の電池。
- リチウムの複合酸化物の遷移金属がAlによって置換されている請求項1から3のいずれかに記載の電池。
- リチウムおよび少なくとも1種の遷移金属の複合酸化物が式LiNi0.80Co0.15Al0.05O2を有する請求項4に記載の電池。
- M2がFe、Ni、Co、Mn、およびVから選択された少なくとも1種の元素である請求項1から5のいずれかに記載の電池。
- M2がFeである請求項6に記載の電池。
- M2がMg、Al、B、Ti、Si、Zr、Fe、Zn、およびCuから選択された1種の元素によって置換されている請求項1から7のいずれかに記載の電池。
- リン、リチウム、および1種の遷移金属の前記複合酸化物が好ましくはLiFePO4、LiVPO4F、およびLi3Fe2PO4から選択され、かつ少なくとも部分的に置換されていてもよい請求項1から8のいずれかに記載の電池。
- 正極が結合剤および導電性物質をさらに含む請求項1から9のいずれかに記載の電池。
- 負極および隔離板をさらに含む請求項10に記載の電池。
- 前記負極が、金属リチウム、リチウム合金、リチウムをその構造に挿入することができる炭素含有物質、およびリチウムと遷移金属との複合酸化物から選択された電気化学的活物質を含む請求項1から11のいずれかに記載の電池。
- 前記炭素含有物質が、黒鉛、コークス、カーボンブラック、およびガラス状炭素から選択される請求項12に記載の電池。
- 前記電解質が、溶媒に溶解したリチウム塩を含む非水性液体電解質から選択される請求項1から13のいずれか一項に記載の電池。
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FR0315225A FR2864349B1 (fr) | 2003-12-23 | 2003-12-23 | Matiere electrochimiquement active pour electrode positive de generateur electrochimique rechargeable au lithium |
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Cited By (7)
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JP2008235151A (ja) * | 2007-03-23 | 2008-10-02 | Sanyo Electric Co Ltd | 非水電解質二次電池 |
JP2008235150A (ja) * | 2007-03-23 | 2008-10-02 | Sanyo Electric Co Ltd | 非水電解質二次電池 |
US7700009B2 (en) | 2007-02-27 | 2010-04-20 | Sanyo Electric Co., Ltd. | Method for producing positive electrode active material of non-aqueous electrolyte secondary cell |
WO2010053174A1 (ja) | 2008-11-06 | 2010-05-14 | 株式会社ジーエス・ユアサコーポレーション | リチウム二次電池用正極及びリチウム二次電池 |
JP2011198629A (ja) * | 2010-03-19 | 2011-10-06 | Gs Yuasa Corp | 非水電解質二次電池用電極及び非水電解質二次電池 |
JP2011198657A (ja) * | 2010-03-19 | 2011-10-06 | Gs Yuasa Corp | 非水電解質二次電池用電極及び非水電解質二次電池 |
JP2015228282A (ja) * | 2014-05-30 | 2015-12-17 | トヨタ自動車株式会社 | 非水電解質二次電池およびその製造方法 |
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WO2004102700A1 (ja) * | 2003-05-15 | 2004-11-25 | Yuasa Corporation | 非水電解質電池 |
JP4445447B2 (ja) * | 2005-09-15 | 2010-04-07 | 株式会社東芝 | 非水電解質電池および電池パック |
JP5013772B2 (ja) * | 2006-01-31 | 2012-08-29 | 三洋電機株式会社 | 電気二重層キャパシタ |
EP2015382A1 (en) * | 2007-07-13 | 2009-01-14 | High Power Lithium S.A. | Carbon coated lithium manganese phosphate cathode material |
US8147916B2 (en) | 2008-03-07 | 2012-04-03 | Bathium Canada Inc. | Process for making electrodes for lithium based electrochemical cells |
US8420158B2 (en) | 2008-03-07 | 2013-04-16 | Bathium Canada Inc. | Process for making electrodes for lithium based electrochemical cells |
FR2946972B1 (fr) | 2009-06-23 | 2011-06-24 | Saft Groupe Sa | Materiau d'electrode positive pour accumulateur lithium-ion |
US11081721B2 (en) | 2009-11-24 | 2021-08-03 | Duracell U.S. Operations, Inc. | Secondary electrochemical cells with separator and electrolyte combination |
DE102014200105A1 (de) * | 2014-01-08 | 2015-07-09 | Bayerische Motoren Werke Aktiengesellschaft | Sicherheitsmaßnahme für großformatige Li-Ionen Zellen hoher Energiedichte |
CN109065854A (zh) * | 2018-07-09 | 2018-12-21 | 华南师范大学 | 一种纳米碳包覆氧化锌复合材料的制备方法及电极的制备方法 |
JP6719038B1 (ja) * | 2018-11-22 | 2020-07-08 | 出光興産株式会社 | 硫化物固体電解質及びその処理方法 |
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JP3726958B2 (ja) * | 2002-04-11 | 2005-12-14 | ソニー株式会社 | 電池 |
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JP2002170567A (ja) * | 2000-12-04 | 2002-06-14 | Sony Corp | 非水電解液電池 |
JP2002216755A (ja) * | 2001-01-22 | 2002-08-02 | Denso Corp | 非水電解質二次電池 |
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US7700009B2 (en) | 2007-02-27 | 2010-04-20 | Sanyo Electric Co., Ltd. | Method for producing positive electrode active material of non-aqueous electrolyte secondary cell |
JP2008235151A (ja) * | 2007-03-23 | 2008-10-02 | Sanyo Electric Co Ltd | 非水電解質二次電池 |
JP2008235150A (ja) * | 2007-03-23 | 2008-10-02 | Sanyo Electric Co Ltd | 非水電解質二次電池 |
WO2010053174A1 (ja) | 2008-11-06 | 2010-05-14 | 株式会社ジーエス・ユアサコーポレーション | リチウム二次電池用正極及びリチウム二次電池 |
JP2011198629A (ja) * | 2010-03-19 | 2011-10-06 | Gs Yuasa Corp | 非水電解質二次電池用電極及び非水電解質二次電池 |
JP2011198657A (ja) * | 2010-03-19 | 2011-10-06 | Gs Yuasa Corp | 非水電解質二次電池用電極及び非水電解質二次電池 |
JP2015228282A (ja) * | 2014-05-30 | 2015-12-17 | トヨタ自動車株式会社 | 非水電解質二次電池およびその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
FR2864349A1 (fr) | 2005-06-24 |
US20050196673A1 (en) | 2005-09-08 |
EP1548861A1 (fr) | 2005-06-29 |
FR2864349B1 (fr) | 2014-08-15 |
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