JP2005108818A - リチウム二次電池用正極材料及びその製造方法 - Google Patents
リチウム二次電池用正極材料及びその製造方法 Download PDFInfo
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Abstract
【解決手段】 一般式Li[Li(1−x)/3CrxTi2/3yMn2(1−x−y)/3]O2(0≦x≦0.3、0≦y≦0.3、0.1≦x+y≦0.3である)と表示され、α−LiFeO2層状構造を有するリチウム−クロム−チタン−マンガン系酸化物からなることを特徴とするリチウム二次電池用正極材料である。この酸化物を製造するために、チタン酸化物が浮遊したクロムアセテートヒドロキシド及びマンガンアセテートテトラハイドレートの第1混合液を製造する。第1混合液にリチウムヒドロキシド水溶液を添加して均一な沈殿を形成する。均一な沈殿を加熱して上述の組成の母体酸化物粉末を形成する。母体酸化物粉末を熱処理して層状構造を有する酸化物粉末を形成する。これにより、初期反応過程でアセテート基の燃焼反応によって多孔性の強い母体酸化物粉末を得る。
【選択図】 図1
Description
(1)組成がLi[Li0.30Cr0.10Ti0.07Mn0.53]O2である場合、リチウムヒドロキシド11.13g、マンガンアセテートテトラハイドレート6.39g、クロムアセテートヒドロキシド74.33g、チタン酸化物1.08g。
(2)組成がLi[Li0.27Cr0.20Ti0.07Mn0.46]O2である場合、リチウムヒドロキシド10.87g、マンガンアセテートテトラハイドレート3.12g、クロムアセテートヒドロキシド78.67g、チタン酸化物1.08g。
(3)組成がLi[Li0.30Cr0.10Ti0.10Mn0.50]O2である場合、リチウムヒドロキシド11.13g、マンガンアセテートテトラハイドレート4.89g、クロムアセテートヒドロキシド74.33g、チタン酸化物1.61g。
(4)組成がLi[Li0.32Cr0.05Ti0.03Mn0.60]O2である場合、リチウムヒドロキシド11.27g、マンガンアセテートテトラハイドレート9.69g、クロムアセテートヒドロキシド72.17g、チタン酸化物0.54g。
Claims (9)
- 一般式Li[Li(1−x)/3CrxTi2/3yMn2(1−x−y)/3]O2(ここで、0≦x≦0.3、0≦y≦0.3、0.1≦x+y≦0.3である)と表示されるリチウム−クロム−チタン−マンガン系酸化物であることを特徴とするリチウム二次電池用正極材料。
- チタン酸化物が浮遊したクロムアセテートヒドロキシド及びマンガンアセテートテトラハイドレートの第1混合液を製造する段階と、
前記第1混合液にリチウムヒドロキシド水溶液を添加して均一な沈殿を形成する段階と、
前記均一な沈殿を加熱してLi[Li(1−x)/3CrxTi2/3yMn2(1−x−y)/3]O2(0≦x≦0.3、0≦y≦0.3、0.1≦x+y≦0.3)組成の母体酸化物粉末を形成する段階と、
前記母体酸化物粉末を熱処理して層状構造を有する酸化物粉末を形成する段階と
を含むことを特徴とするリチウム二次電池用正極材料の製造方法。 - 前記母体酸化物粉末を形成する段階は、前記均一な沈殿をホットプレートで加熱して燃焼させる段階を含むことを特徴とする請求項2に記載のリチウム二次電池用正極材料の製造方法。
- 前記沈殿をホットプレートで加熱する段階は、前記均一な沈殿をチタンホイルにコーティングした状態で行われることを特徴とする請求項3に記載のリチウム二次電池用正極材料の製造方法。
- 前記母体酸化物粉末を熱処理する段階は、
前記母体酸化物粉末を650〜700℃の範囲で選択される第1温度で1次熱処理する段階と、
前記1次熱処理された酸化物粉末を前記第1温度より高い第2温度で2次熱処理する段階と
を含むことを特徴とする請求項2に記載のリチウム二次電池用正極材料の製造方法。 - 前記第2温度は、900〜1000℃の範囲内で選択されることを特徴とする請求項5に記載のリチウム二次電池用正極材料の製造方法。
- 前記2次熱処理を行う前に前記1次熱処理された酸化物粉末を粉砕する段階をさらに含むことを特徴とする請求項5に記載のリチウム二次電池用正極材料の製造方法。
- 前記2次熱処理は、空気中で行われることを特徴とする請求項5に記載のリチウム二次電池用正極材料の製造方法。
- 前記2次熱処理された酸化物粉末を急速冷却させる段階をさらに含むことを特徴とする請求項5に記載のリチウム二次電池用正極材料の製造方法。
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KR1020030066949A KR100564748B1 (ko) | 2003-09-26 | 2003-09-26 | 리튬 이차전지용 양극 재료 및 그 제조 방법 |
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JP4009624B2 JP4009624B2 (ja) | 2007-11-21 |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009076446A (ja) * | 2007-09-19 | 2009-04-09 | Samsung Sdi Co Ltd | カソード及びそれを採用したリチウム電池 |
JP2009117365A (ja) * | 2007-11-07 | 2009-05-28 | Korea Inst Of Science & Technology | 電極活物質の製造方法及びその方法で製造された電極活物質を含むリチウム電池 |
JP2012204291A (ja) * | 2011-03-28 | 2012-10-22 | Tokyo Univ Of Science | リチウムイオン二次電池およびこれに用いる正極材料 |
CN104755635A (zh) * | 2012-10-04 | 2015-07-01 | 雷诺两合公司 | 用于粉末形式材料的热处理装置以及对应的热处理方法 |
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JPH08319120A (ja) * | 1995-05-19 | 1996-12-03 | Nippon Chem Ind Co Ltd | リチウム複合酸化物、その製造方法およびリチウム二次電池 |
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JP2001185146A (ja) * | 1999-12-27 | 2001-07-06 | Yuasa Corp | リチウム二次電池 |
JP2002068748A (ja) * | 2000-08-31 | 2002-03-08 | National Institute Of Advanced Industrial & Technology | 単相リチウムフェライト系複合酸化物 |
JP2002324543A (ja) * | 2001-04-27 | 2002-11-08 | Sakai Chem Ind Co Ltd | リチウムイオン二次電池とそのための正極活物質 |
JP2003238165A (ja) * | 2000-11-16 | 2003-08-27 | Hitachi Maxell Ltd | リチウム含有複合酸化物およびその製造方法 |
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- 2003-09-26 KR KR1020030066949A patent/KR100564748B1/ko not_active IP Right Cessation
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- 2004-08-17 JP JP2004237632A patent/JP4009624B2/ja active Active
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JPH08319120A (ja) * | 1995-05-19 | 1996-12-03 | Nippon Chem Ind Co Ltd | リチウム複合酸化物、その製造方法およびリチウム二次電池 |
JP2000173599A (ja) * | 1998-12-10 | 2000-06-23 | Matsushita Electric Ind Co Ltd | リチウム二次電池用正極活物質の製造方法およびリチウム二次電池 |
JP2001185146A (ja) * | 1999-12-27 | 2001-07-06 | Yuasa Corp | リチウム二次電池 |
JP2002068748A (ja) * | 2000-08-31 | 2002-03-08 | National Institute Of Advanced Industrial & Technology | 単相リチウムフェライト系複合酸化物 |
JP2003238165A (ja) * | 2000-11-16 | 2003-08-27 | Hitachi Maxell Ltd | リチウム含有複合酸化物およびその製造方法 |
JP2002324543A (ja) * | 2001-04-27 | 2002-11-08 | Sakai Chem Ind Co Ltd | リチウムイオン二次電池とそのための正極活物質 |
JP2004006293A (ja) * | 2002-04-04 | 2004-01-08 | Sony Corp | 正極材料およびその製造方法、並びにそれを用いた電池 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009076446A (ja) * | 2007-09-19 | 2009-04-09 | Samsung Sdi Co Ltd | カソード及びそれを採用したリチウム電池 |
JP2014060171A (ja) * | 2007-09-19 | 2014-04-03 | Samsung Sdi Co Ltd | リチウム電池 |
JP2009117365A (ja) * | 2007-11-07 | 2009-05-28 | Korea Inst Of Science & Technology | 電極活物質の製造方法及びその方法で製造された電極活物質を含むリチウム電池 |
JP2012204291A (ja) * | 2011-03-28 | 2012-10-22 | Tokyo Univ Of Science | リチウムイオン二次電池およびこれに用いる正極材料 |
CN104755635A (zh) * | 2012-10-04 | 2015-07-01 | 雷诺两合公司 | 用于粉末形式材料的热处理装置以及对应的热处理方法 |
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KR100564748B1 (ko) | 2006-03-27 |
KR20050030459A (ko) | 2005-03-30 |
US20050069772A1 (en) | 2005-03-31 |
JP4009624B2 (ja) | 2007-11-21 |
US7157072B2 (en) | 2007-01-02 |
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