基本信息:
- 专利标题： 正极活性物质、正极材料、正极及非水电解质二次电池
- 专利标题（英）：POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE MATERIAL, POSITIVE ELECTRODE, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
- 申请号：CN201910712128.3 申请日：2014-03-13
- 公开(公告)号：CN110518234A 公开(公告)日：2019-11-29
- 发明人： 上井健太 , 加世田学
- 申请人： 日产自动车株式会社
- 申请人地址： 日本神奈川县
- 专利权人： 日产自动车株式会社
- 当前专利权人： 远景AESC日本有限公司
- 当前专利权人地址： 日本神奈川县
- 代理机构： 北京林达刘知识产权代理事务所
- 代理人： 刘新宇; 李茂家
- 优先权： 2013-054052 2013.03.15 JP
- 主分类号： H01M4/505
- IPC分类号： H01M4/505 ; H01M4/525 ; H01M4/131 ; H01M10/0525
The present invention relates to a positive electrode active material, a positive electrode material, a positive electrode, and a nonaqueous electrolyte secondary battery. The present invention provides a means capable of suppressing a decrease in capacity and improving output characteristics of a non-aqueous electrolyte secondary battery when the battery is used for a long period of time. [Solving Means] Disclosed is a positive electrode active substance for a non-aqueous electrolyte secondary battery, in which the true density/tap density of secondary particles of a lithium composite oxide containing nickel as the main component is within the range of 1.6 to 2.3, and in the secondary particles, the average porosity on the center side of the half (R/2 [[mu]m]) of the particle radius (R) of D50 of the secondary particles is larger than the average porosity on the surface side.