发明申请
- 专利标题： Positive electrode active material for lithium secondary cell and lithium secondary cell
- 专利标题（中）： 锂二次电池和锂二次电池用正极活性物质
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申请号： US10486080申请日： 2004-02-06
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公开(公告)号： US20040234857A1公开(公告)日： 2004-11-25
- 发明人: Ryuji Shiozaki , Akihiro Fujii , Kazuya Okabe , Toshiyuki Nukuda
- 优先权： JP2001-358017 20011122
- 主分类号： H01M004/50
- IPC分类号： H01M004/50 ; H01M004/52 ; C01G045/12 ; C01G051/04 ; C01G053/04
摘要：
A positive active material for lithium secondary batteries is provided with which a lithium secondary battery having a high energy density and excellent charge/discharge cycle performance can be obtained. Also provided is a lithium secondary battery having a high energy density and excellent charge/discharge cycle performance. The positive active material for lithium secondary batteries is characterized by comprising a composite oxide which is represented by the composite formula LixMnaNibCocO2 (wherein a, b, and c are values within such a range that in a ternary phase diagram showing the relationship among these, (a, b, c) is present on the perimeter of or inside the quadrilateral ABCD defined by point A (0.5, 0.5, 0), point B (0.55, 0.45, 0), point C (0.55, 0.15, 0.30), and point D (0.15, 0.15, 0.7) as vertexes, and 0.95
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