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 layer 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 the 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. |
申请人 |
NIPPON MINING & METALS CO.,LTD.;SATOH, HIROHITO;KAJIYA, YOSHIO;NAGASE. RYUICHI |
发明人 |
SATOH, HIROHITO;KAJIYA, YOSHIO;NAGASE. RYUICHI |