JP5423725B2 - 正極活物質粒子及びその製造方法 - Google Patents
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Description
硫化物系固体電解質と正極活物質との反応を抑制するための、炭素源を含む反応抑制層の前駆体を調製する工程、
正極活物質本体の表面に、反応抑制層の前駆体をコーティングする工程、及び
反応抑制層前駆体をコーティングした正極活物質を、50vol%以上の酸素濃度雰囲気中で熱処理して、カーボンを含有する反応抑制層を表面に形成した正極活物質粒子を形成する工程、
を含む、正極活物質粒子の製造方法である。
まず、Li3BO3−Li4SiO4反応抑制層の前駆体溶液を調製した。エタノール中にホウ酸が0.066mol/L、TEOSが0.066mol/L、及び酢酸リチウムが0.463mol/L含まれるように、エタノール溶媒に、等モルのホウ酸及びTEOS、並びに酢酸リチウムを溶解させて、Li3BO3−Li4SiO4反応抑制層の前駆体溶液を調製した。調製方法について以下に具体的に示す。
実施例1と同様の条件で反応抑制層の前駆体溶液を調製し、活物質へのコーティングを行った。次いで、電気炉にて、大気中(酸素濃度21vol%)で、350℃、5時間、熱処理を行い、反応抑制層をコーティングした正極活物質粒子を得た。反応抑制層は、平均10nm厚で活物質本体にコーティングされていた。
11 活物質本体
12 反応抑制層
20 メカノフュージョン後の活物質粒子
21 活物質本体
22 反応抑制層
23 カーボン
30 活物質粒子
31 活物質本体
32 炭素源含有反応抑制層前駆体
40 高酸素雰囲気で熱処理後の活物質粒子
41 活物質本体
42 カーボン含有反応抑制層
Claims (7)
- 硫化物系固体電解質を含む全固体電池用の正極活物質粒子であって、前記硫化物系固体電解質との反応を抑制するための、単体で存在するカーボンを含有し且つ1〜100nmの厚みを有する反応抑制層によりコーティングされている正極活物質粒子。
- リチウム遷移金属酸化物を含む、請求項1に記載の正極活物質粒子。
- 硫化物系固体電解質を含む全固体電池用の正極活物質粒子の製造方法であって、
前記硫化物系固体電解質との反応を抑制するための、炭素源を含む反応抑制層の前駆体を調製する工程、
正極活物質本体の表面に、前記反応抑制層の前駆体をコーティングする工程、及び
前記反応抑制層前駆体をコーティングした正極活物質を、50vol%以上の酸素濃度雰囲気中で熱処理して、カーボンを含有する反応抑制層を正極活物質粒子の表面に形成する工程、
を含む、正極活物質粒子の製造方法。 - 前記炭素源を含む反応抑制層の前駆体を調製する工程が、
ガラスネットワークを形成する溶液と有機酸リチウム塩とを混合すること、
を含む、請求項3に記載の正極活物質粒子の製造方法。 - 前記炭素源を含む反応抑制層の前駆体を調製する工程が、
ホウ酸、テトラエトキシシラン、及びアルコールを混合して、加水分解反応によりB−Siのガラスネットワークを形成した溶液を調製すること、
前記B−Siのガラスネットワークを形成した溶液に、有機酸リチウム塩を混合すること、
を含む、請求項3に記載の正極活物質粒子の製造方法。 - 前記有機酸リチウム塩が、酢酸リチウムまたは乳酸リチウムである、請求項4または5に記載の正極活物質粒子の製造方法。
- 前記正極活物質本体が、リチウム遷移金属酸化物を含む、請求項3〜6のいずれか一項に記載の正極活物質粒子の製造方法。
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JP2011110132A JP5423725B2 (ja) | 2011-05-17 | 2011-05-17 | 正極活物質粒子及びその製造方法 |
CN201280022923.6A CN103534847B (zh) | 2011-05-17 | 2012-05-15 | 用于全固态电池的正电极活性材料颗粒及其制造方法 |
PCT/IB2012/000946 WO2012156802A1 (en) | 2011-05-17 | 2012-05-15 | Positive-electrode active material particle for all-solid battery and method for production thereof |
US14/116,253 US9640795B2 (en) | 2011-05-17 | 2012-05-15 | Positive-electrode active material particle for all-solid battery and method for production thereof |
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US20110143195A1 (en) * | 2009-06-29 | 2011-06-16 | Shuji Ito | Negative electrode for lithium ion battery, method for producing the same, and lithium ion battery |
JP5551542B2 (ja) | 2009-09-17 | 2014-07-16 | 株式会社オハラ | 全固体電池および全固体電池の製造方法 |
JP5589338B2 (ja) * | 2009-10-09 | 2014-09-17 | 東洋インキScホールディングス株式会社 | リチウム二次電池用正極活物質材料の製造方法、及びそれを用いたリチウム二次電池 |
CN101858043B (zh) * | 2010-04-30 | 2012-07-04 | 湖北达雅化工技术发展有限公司 | 一种稳定的高比表面积硼硅溶胶的制备方法 |
KR102038620B1 (ko) * | 2013-03-26 | 2019-10-30 | 삼성전자주식회사 | 음극, 이를 포함하는 리튬전지, 및 이의 제조 방법 |
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2011
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2012
- 2012-05-15 WO PCT/IB2012/000946 patent/WO2012156802A1/en active Application Filing
- 2012-05-15 CN CN201280022923.6A patent/CN103534847B/zh active Active
- 2012-05-15 US US14/116,253 patent/US9640795B2/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9853323B2 (en) | 2013-10-31 | 2017-12-26 | Samsung Electronics Co., Ltd. | Positive electrode for lithium-ion secondary battery, and lithium-ion secondary battery |
WO2023171890A1 (ko) * | 2022-03-08 | 2023-09-14 | 삼성에스디아이 주식회사 | 전고체 이차 전지 |
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WO2012156802A1 (en) | 2012-11-22 |
CN103534847B (zh) | 2016-06-01 |
US20140072875A1 (en) | 2014-03-13 |
CN103534847A (zh) | 2014-01-22 |
US9640795B2 (en) | 2017-05-02 |
JP2012243443A (ja) | 2012-12-10 |
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