Positive electrode composition for nonaqueous electrolyte secondary battery
AssigneeNichia Corporation
InventorsKousuke SHIMOKITA, Kenta KAWAI
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Abstract
A positive electrode composition for nonaqueous electrolyte secondary battery comprises a lithium transition metal complex oxide represented by a general formula LiaNi1-x-yCoxM1yWzM2wO2, where 1.0≦a≦1.5, 0≦x≦0.5, 0≦y≦0.5, 0.002≦z≦0.03, 0≦w≦0.02, 0≦x+y≦0.7, M1 represents at least one selected from the group consisting of Mn and Al, and M2 represents at least one selected from the group consisting of Zr, Ti, Mg, Ta, Nb and Mo; and a boron compound comprising at least boron element and oxygen element.
Claims28
A positive electrode composition for a nonaqueous electrolyte secondary battery, the positive electrode composition comprising:
- a lithium transition metal complex oxide represented by a general formula LiaNi1-x-yCoxM1yWzM2wO2 (wherein 1.0≦a≦1.5, 0≦x≦0.5, 0≦y≦0.5, 0.002≦z≦0.03, 0≦w≦0.02, 0≦x+y≦0.7, M1 represents at least one selected from the group consisting of Mn and Al, and M2 represents at least one selected from the group consisting of Zr, Ti, Mg, Ta, Nb and Mo);
- and
- a boron compound comprising at least a boron element and an oxygen element.
A positive electrode composition for a nonaqueous electrolyte secondary battery, the positive electrode composition comprising:
- a lithium transition metal complex oxide represented by a general formula LiaNi1-x-yCoxM1yWzM2wO2 (wherein 1.0≦a≦1.5, 0≦x≦0.5, 0≦y≦0.5, 0.002≦z≦0.03, 0≦w≦0.02, 0≦x+y≦0.7, M1 represents at least one selected from the group consisting of Mn and Al, and M2 represents at least one selected from the group consisting of Zr, Ti, Mg, Ta, Nb and Mo);
- and
- a boron compound comprising at least boron element and oxygen element,
- wherein a ratio of the boron element to the lithium transition metal complex oxide is 2.0 mol % or less.
A method for producing a positive electrode composition for a nonaqueous electrolyte secondary battery, the positive electrode composition comprising a lithium transition metal complex oxide represented by a general formula LiaNi1-x-yCoxM1yWzM2wO2 (1.0≦a≦1.5, 0≦x≦0.5, 0≦y≦0.5, 0.002≦z≦0.03, 0≦w≦0.02, 0≦x+y≦0.7, M1 represents at least one selected from the group consisting of Mn and Al, M2 represents at least one selected from the group consisting of Zr, Ti, Mg, Ta, Nb and Mo), and a boron compound comprising at least boron element and oxygen element, the method comprising at least:
- synthesizing the lithium transition metal complex oxide;
- and
- mixing the lithium transition metal complex oxide obtained by the synthesis and a raw material compound of the boron compound to obtain a mixture.
Dependencies are inferred from the claim text.