Lithium ion secondary battery and manufacturing method therefor

Details Lithium ion secondary battery and manufacturing method therefor Lithium ion secondary battery and manufacturing method therefor

2011-02-01

2011-02-01

Ruddock, Ula C (Department: 1729)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S223000, C429S224000, C429S231100, C429S231500, C429S231600, C429S231900, C429S231950, C029S623500

Reexamination Certificate

active

07879494

ABSTRACT:
Active material particles of a lithium ion secondary battery includes at least a first lithium-nickel composite oxide: LixNi1-y-zCoyMezO2(where 0.85≦x≦1.25, 0<y≦0.5, 0≦z≦0.5, 0<y+z≦0.75, and element Me is at least one selected from the group consisting of Al, Mn, Ti, Mg, and Ca) forming a core portion thereof. The surface layer portion of the active material particles includes nickel oxide having the NaCl-type crystal structure or a second lithium-nickel composite oxide, and further includes element M not forming the crystal structure of the first lithium-nickel composite oxide. Element M is at least one selected from the group consisting of Al, Mn, Mg, B, Zr, W, Nb, Ta, In, Mo, and Sn.

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