发明名称 |
POSITIVE ELECTRODE ACTIVE SUBSTANCE PARTICLES AND PROCESS FOR PRODUCING THE SAME, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY |
摘要 |
The present invention relates to positive electrode active substance particles comprising a compound having at least a crystal system belonging to a space group of R−3m and a crystal system belonging to a space group of C2/m, and boron, wherein the compound is a composite oxide comprising at least Li, Mn, and Co and/or Ni; a relative intensity ratio [(a)/(b)] of a maximum diffraction peak intensity (a) observed at 2&thetas;=20.8±1° in a powder X-ray diffraction pattern of the positive electrode active substance as measured using a Cu-Ka ray to a maximum diffraction peak intensity (b) observed at 2&thetas;=18.6±1° in the powder X-ray diffraction pattern, is 0.02 to 0.5; a content of Mn in the positive electrode active substance particles is controlled such that a molar ratio of Mn/(Ni+Co+Mn) therein is not less than 0.55; and the positive electrode active substance particles comprise the boron in an amount of 0.001 to 3% by weight. The positive electrode active substance particles of the present invention are produced by calcining a mixture comprising precursor particles comprising Mn, and Ni and/or Co, a lithium compound and a boron compound at a temperature of 500 to 1500° C. The positive electrode active substance particles of the present invention can provide a secondary battery which can be improved in charge/discharge capacity and cycle characteristics. |
申请公布号 |
US2012217435(A1) |
申请公布日期 |
2012.08.30 |
申请号 |
US201013497628 |
申请日期 |
2010.09.28 |
申请人 |
YAMAMOTO MANABU;NISHIKAWA DAISUKE;ISHIZAKI KAZUTOSHI;KIKUYA KAZUHIKO;SANTOKI TERUAKI;SASAKI OSAMU;SADAMURA HIDEAKI |
发明人 |
YAMAMOTO MANABU;NISHIKAWA DAISUKE;ISHIZAKI KAZUTOSHI;KIKUYA KAZUHIKO;SANTOKI TERUAKI;SASAKI OSAMU;SADAMURA HIDEAKI |
分类号 |
H01M4/525;H01M4/485;H01M4/50 |
主分类号 |
H01M4/525 |
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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