Electrode material for lithium-ion secondary battery and method for manufacturing same
AssigneeSumitomo Osaka Cement Co., Ltd.
InventorsSatoru Oshitari, Masataka Oyama, Ryuuta Yamaya
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Abstract
An electrode material for a lithium-ion secondary battery of the present invention includes particles which are made of LiFexMn1-w-x-y-zMgyCazAwPO4, have an orthorhombic crystal structure, and have a space group of Pmna, in which a mis-fit value [(1−(b2×c2)/(b1×c1))×100] of a bc plane which is computed from lattice constants b1 and c1 of the LiFexMn1-w-x-y-zMgyCazAwPO4 and lattice constants b2 and c2 of FexMn1-w-x-y-zMgyCazAwPO4 obtained by deintercalating Li from LiFexMn1-w-x-y-zMgyCazAwPO4 by means of an oxidation treatment using nitrosonium tetrafluoroborate in acetonitrile is 1.32% or more and 1.85% or less.
Claims4
An electrode material for a lithium-ion secondary battery comprising:
- particles which are made of LiFexMn1-w-x-y-zMgyCaZAwPO4 (wherein A represents at least one element selected from the group consisting of Co, Ni, Zn, Al, and Ga, 0.05≦x≦0.035, 0.01≦y≦0.10, 0.0001≦z≦0.001, and 0≦w≦0.002, and have an orthorhombic crystal structure with a space group of Pnma,
- wherein a mis-fit value of a bc plane is 1.32% to 1.85%, wherein the mis-fit value is represented by the formula (1−(b2×c2)/(b1×c1)×100 and is calculated from lattice constants b1 and c1 of the LiFexMn1-w-x-y-zMgyCazAwPO4 and lattice constants b2 and c2 of the FexMn1-w-x-y-zMgyCazAwPO4 obtained by deintercalating Li from the LiFexMn1-w-x-y-zMgyCazAwPO4 by means of an oxidation treatment using nitrosonium tetrafluoroborate in acetonitrile.
Dependencies are inferred from the claim text.