发明授权
- 专利标题: Positive electrode active material, method for producing the same, and electrochemical device
- 专利标题(中): 正极活性物质及其制造方法,电化学装置
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申请号: US12733363申请日: 2008-09-02
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公开(公告)号: US09413005B2公开(公告)日: 2016-08-09
- 发明人: Kenta Yamamoto , Yuri Nakayama
- 申请人: Kenta Yamamoto , Yuri Nakayama
- 申请人地址: JP Tokyo
- 专利权人: Sony Corporation
- 当前专利权人: Sony Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Wolf, Greenfield & Sacks, P.C.
- 优先权: JP2007-233135 20070907
- 国际申请: PCT/JP2008/065711 WO 20080902
- 国际公布: WO2009/031511 WO 20090312
- 主分类号: H01M10/00
- IPC分类号: H01M10/00 ; H01M4/00 ; H01M4/505 ; C01G45/02 ; H01M10/054 ; H01M4/38
摘要:
The invention provides a high-capacity positive electrode active material capable of sufficiently exploiting the excellent characteristics of magnesium metal or the like as a negative electrode active material, such as high energy capacity; a method for producing the same; and an electrochemical device using the positive electrode active material. A positive electrode 11 includes a positive electrode can 1, a positive pole pellet 2 having a positive electrode active material and the like, and a metal mesh support 3. A negative electrode 12 includes a negative electrode cap 4 and a negative electrode active material 5 such as magnesium metal. The positive electrode pellet 2 and the negative electrode active material 5 are disposed so as to sandwich a separator 6, and an electrolyte 7 is injected into the separator 6. The positive electrode active material, which provides the feature of the invention, is synthesized by a step of reacting a permanganate, such as potassium permanganate, with hydrochloric acid preferably having a concentration of 3 to 4 mol/l to produce a precipitate, and a step of filtering the precipitate, thoroughly washing the filtered precipitate with water, and then subjecting the washed precipitate to heat treatment preferably at a temperature of 300 to 400° C. for not less than 2 hours, thereby giving a manganese oxide.