发明名称 |
Positive electrode active material for lithium ion battery |
摘要 |
Disclosed is a positive electrode active material that provides an improved capacity density. Specifically disclosed is a positive electrode active material for a lithium ion battery with a layered structure represented by Lix(NiyM1-y)Oz (wherein M represents at least one element selected from a group consisting of Mn, Co, Mg, Al, Ti, Cr, Fe, Cu, and Zr; x is in the range from 0.9 to 1.2; y is in the range from 0.3 to 0.95; and z is in the range from 1.8 to 2.4), wherein, when a value obtained by dividing an average of peak intensities observed between 1420 and 1450 cm−1 and between 1470 and 1500 cm−1 by the maximum intensity of a peak appearing between 520 and 620 cm−1 in an infrared absorption spectrum obtained by FT-IR is represented by A, A satisfies the following relational formula: 0.20y−0.05≦A≦0.53y−0.06. |
申请公布号 |
US8748041(B2) |
申请公布日期 |
2014.06.10 |
申请号 |
US201013258120 |
申请日期 |
2010.03.03 |
申请人 |
JX Nippon Mining & Metals Corporation |
发明人 |
Satoh Hirohito;Kajiya Yoshio;Nagase Ryuichi |
分类号 |
H01M4/13;H01M4/50;H01M4/00 |
主分类号 |
H01M4/13 |
代理机构 |
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代理人 |
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主权项 |
1. A positive electrode active material for a lithium ion battery, said active material having a layered structure represented by the following compositional formula:
Lix(NiyM1-y)Oz in which M is one or more selected from the group consisting of Mn, Co, Mg, Al, Ti, Cr, Fe, Cu and Zr with the proviso that at least Mn is selected, x is within the range of 0.9-1.2, y is within the range of 0.5-0.95 and z is within the range of 1.8-2.4 wherein when A is defined as a value which is obtained by dividing an average of the peak intensities observed at 1420-1450 cm−1 and 1470-1500 cm−1 by the maximum peak intensity which appears at 520-620 cm−1 in an infrared absorption spectrum obtained by FT-IR, A satisfies the following relational formula:
0.24y−0.05≦A≦0.48y−0.08.
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地址 |
Tokyo JP |