| 摘要 |
PROBLEM TO BE SOLVED: To provide a lithium iron manganese silicate-based positive electrode active material having a stable cation exchange structure and the like.SOLUTION: A lithium ion secondary battery positive electrode active material is characterized by being represented by general formula Li(FeMnZn)SiO(0<x≤2.5, a+b+c=1, 0.1≤c≤0.5), by having at least one crystal structure of a space group P2/n or a space group Pmn2as a matrix structure, and by having a cation exchange structure in which an Li atom is introduced into a part of an Fe/Mn/Zn site and any one of an Fe atom, an Mn atom or a Zn atom is introduced into a part of an Li site.SELECTED DRAWING: Figure 1 |
