发明授权
- 专利标题: Cathode active material for lithium secondary battery
- 专利标题(中): 锂二次电池用阴极活性物质
-
申请号: US12833518申请日: 2010-07-09
-
公开(公告)号: US08277980B2公开(公告)日: 2012-10-02
- 发明人: Sung kyun Chang , Hong-Kyu Park , Hyo-shik Kil , Jin-hyung Lim
- 申请人: Sung kyun Chang , Hong-Kyu Park , Hyo-shik Kil , Jin-hyung Lim
- 申请人地址: KR Seoul
- 专利权人: LG Chem, Ltd.
- 当前专利权人: LG Chem, Ltd.
- 当前专利权人地址: KR Seoul
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: KR10-2009-0031032 20090409
- 主分类号: H01M4/00
- IPC分类号: H01M4/00 ; H01M4/13 ; H01M4/50 ; H01M4/58 ; H01M4/88 ; C01D1/02 ; C01G45/12
摘要:
Provided is a cathode active material which is lithium transition metal oxide having an α-NaFeO2 layered crystal structure, wherein the transition metal is a blend of Ni and Mn, an average oxidation number of the transition metals except lithium is +3 or higher, and lithium transition metal oxide satisfies the Equation m(Ni)≧m(Mn) (in which m (Ni) and m (Mn) represent an molar number of manganese and nickel, respectively). The lithium transition metal oxide has a uniform and stable layered structure through control of oxidation number of transition metals to a level higher than +3, thus advantageously exerting improved overall electrochemical properties including electric capacity, in particular, superior high-rate charge/discharge characteristics.
公开/授权文献
- US20110140036A1 CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY 公开/授权日:2011-06-16