CPC H01M 10/0525 (2013.01) [H01M 4/0404 (2013.01); H01M 4/366 (2013.01); H01M 4/485 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/62 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] | 12 Claims |
1. A positive electrode material for lithium ion secondary batteries, comprising a mixture which includes:
a positive electrode active material in which a length of a longest side of a primary particle of the active material is 1 nm or more and 1000 nm or less; and
A NASICON-type compound in which a length of a longest side of a primary particle of the compound is 1 nm or more and 1000 nm or less,
wherein, the positive electrode active material is at least one selected from a group consisting of Li3FePO4, Li Fe0.26Mn0.7Mg0.0349Co0.05Ca0.001PO4, and LiCoPO4, and
the NASICON-type compound is represented by formula LiaAlbTi2-b(PO4)3, and
a mixing ratio by mass of the positive electrode active material to the NASICON-type compound is from 99:1 to 90.5:9.5, wherein 0.8≤a≤1.5 and 0≤b≤0.5.
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