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：CN201480016403.3 申请日：2014-03-13
- 公开(公告)号：CN105051952A 公开(公告)日：2015-11-11
- 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： 日产自动车株式会社
- 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
- 国际申请： PCT/JP2014/056793 2014.03.13
- 国际公布： WO2014/142279 JA 2014.09.18
- 进入国家日期： 2015-09-15
- 主分类号： H01M4/525
- IPC分类号： H01M4/525 ; H01M2/16 ; H01M4/131 ; H01M4/36 ; H01M4/505 ; H01M10/052
[Problem] To provide a means capable of improving the output characteristics of a nonaqueous electrolyte secondary battery by suppressing decrease of the capacity in cases where the nonaqueous electrolyte secondary battery is used for a long period of time. [Solution] A positive electrode active material for nonaqueous electrolyte secondary batteries, which is characterized in that: the true density/tap density of secondary particles of a lithium complex oxide that is mainly composed of nickel is within the range of 1.6-2.3; and within 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.