Lithium ion secondary battery positive electrode material, lithium ion secondary battery positive electrode member, and lithium ion secondary battery
AssigneeShoei Chemical Inc.
InventorsHirokazu Sasaki, Atsushi Nemoto, Masahiko Miyahara
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Abstract
A cathode material for a lithium ion secondary battery includes an oxide represented by a composition formula Li2-xMIIyM(Si,MB)O4, wherein MII represents a divalent element; M represents at least one element selected from the group consisting of Fe, Mn, Co and Ni; and MB represents, as an optional component, an element substituted for Si to compensate for a difference between an electric charge of [Li2]2+ and an electric change of [Li2-xMIIy]n+ as needed. In the composition formula representing the oxide, x and y are −0.25<x≦0.25 and 0<y≦0.25.
Claims11
A cathode material for a lithium ion secondary battery comprising an oxide represented by a composition formula Li2-xMIIyM(Si,MB)O4 (wherein MII represents a divalent element;
- M represents at least one element selected from the group consisting of Fe, Mn, Co and Ni;
- and MB represents, as an optional component, an element substituted for Si to compensate for a difference between an electric charge of [Li2]2+ and an electric change of [Li2-xMIIy]n+ as needed), wherein
- in the composition formula representing the oxide, x and y are −0.25<x≦0.25 and 0<y≦0.25, and
- wherein the MII exists at a Li site of the composition formula Li2-xMIIyM(Si,MB)O4.
(canceled)
Dependencies are inferred from the claim text.