发明授权
- 专利标题: Lithium secondary battery containing cathode materials having high energy density and organic/inorganic composite porous membrane
- 专利标题(中): 含有能量密度高的阴极材料的锂二次电池和有机/无机复合多孔膜
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申请号: US13223731申请日: 2011-09-01
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公开(公告)号: US08715856B2公开(公告)日: 2014-05-06
- 发明人: Seungeun Choi , Eunyoung Goh , Hyang Mok Lee , Heegyoung Kang , Sangbaek Ryu , Kiwoong Kim
- 申请人: Seungeun Choi , Eunyoung Goh , Hyang Mok Lee , Heegyoung Kang , Sangbaek Ryu , Kiwoong Kim
- 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: KR10-2009-0018108 20090303
- 主分类号: H01M2/02
- IPC分类号: H01M2/02 ; H01M2/16 ; H01M4/52 ; H01M4/50 ; H01M4/62 ; H01M4/131
摘要:
Disclosed is a secondary battery including a cathode, an anode, a membrane and an electrolyte, wherein the cathode contains a mixture of a first cathode material defined herein and a second cathode material selected from the group consisting of a second-(a) cathode material defined herein and a second-(b) cathode material defined herein, and a combination thereof, wherein a mix ratio of the two cathode materials (first cathode material: second cathode material) is 50:50 to 90:10, and the membrane is an organic/inorganic composite porous membrane including (a) a polyolefin-based membrane substrate and (b) an active layer in which one or more areas selected from the group consisting of the surface of the substrate and a portion of pores of the substrate are coated with a mixture of inorganic particles and a binder polymer, wherein the active layer has a structure in which the inorganic particles are interconnected and fixed through a binder polymer and porous structures are formed by the interstitial volume between the inorganic particles.