发明名称 |
POSITIVE ELECTRODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY CELL |
摘要 |
<p>A positive electrode active material for a non-aqueous electrode secondary cell which comprises a composite oxide containing iron and sodium as main components, having a hexagonal crystal structure, and exhibiting a value obtained by dividing the intensity of a peak corresponding to an interplanar spacing of 2.20 Å by the intensity of a peak corresponding to an inierplanar spacing of 5.36 Å of 2 or less in the X-ray diffraction analysis of said composite oxide; and a method for preparing the positive electrode active material wherein the above composite oxide is prepared by heating a metal compound mixture mainly containing a sodium compound and an iron compound in the temperature range of 400 to 900°C, which comprises heating the metal compound mixture in an inert atmosphere in the temperature range of less than 100°C on the way of the rise in the temperature. The use of the above active material allows the manufacture of a cell which is free from the rapid reduction of the discharge voltage with the progress of discharge.</p> |
申请公布号 |
EP1737058(A1) |
申请公布日期 |
2006.12.27 |
申请号 |
EP20050727878 |
申请日期 |
2005.03.30 |
申请人 |
YAMAKI, JUN-ICHI;OKADA, SHIGETO;SUMITOMO CHEMICAL COMPANY, LIMITED |
发明人 |
YAMAKI, JUN-ICHI;OKADA, SHIGETO;KIYABU, TOSHIYASU;NAKANE, KENJI |
分类号 |
C01G49/00;H01M4/02;H01M4/52;H01M4/525;H01M10/054;H01M10/36 |
主分类号 |
C01G49/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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