| 发明名称 |
POSITIVE ELECTRODE ACTIVE SUBSTANCE AND METHOD FOR PRODUCING SAME |
| 摘要 |
Provided is a positive electrode active substance for obtaining a lithium ion secondary cell having a high discharge capacity and a low direct current resistance. The positive electrode active substance includes secondary particles that are aggregates of multiple primary particles formed from a lithium-containing compound oxide. The lithium-containing compound oxide is represented by aLi(Li1/3Mn2/3)O2·(1-a)LiMO2 (where M is at least one element selected from among Ni, Co and Mn, and 0<a<1). The secondary particles have a cross-sectional void rate of 12 to 40%, and the closed pore rate of the positive electrode active substance is 5% or less. Also provided is a method for producing the positive electrode active substance by mixing, in an aqueous solution state, at least two selected from the group consisting of Ni sulfate, Co sulfate, and Mn sulfate and at least one selected from the group consisting of Na carbonate, K carbonate, NaOH and KOH, to obtain a coprecipitate, and then mixing the coprecipitate and lithium carbonate and calcining the product thereof. |
| 申请公布号 |
WO2015108163(A1) |
申请公布日期 |
2015.07.23 |
| 申请号 |
WO2015JP51141 |
申请日期 |
2015.01.16 |
| 申请人 |
ASAHI GLASS COMPANY, LIMITED |
发明人 |
SAKAI, TOMOHIRO;TAKASUGI, TSUBASA;TERATANI, TAKUYA;TSUNOZAKI, KENTARO;FUKUMOTO, KOHTA |
| 分类号 |
H01M4/505;H01M4/36;H01M4/485;H01M4/525 |
主分类号 |
H01M4/505 |
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