Positive active material for non-aqueous electrolyte...

Details Positive active material for non-aqueous electrolyte... Positive active material for non-aqueous electrolyte...

2005-05-17

2005-05-17

Weiner, Laura (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S231100, C429S223000, C429S224000, C429S231400, C429S231800, C252S521200

Reexamination Certificate

active

06893776

ABSTRACT:
A positive active material for a non-aqueous electrolyte secondary battery includes a lithium-nickel composite oxide represented by the compositional formula LiaNi1−b−cCObMncO2(a≦1.09, 0.05≦b≦0.35, 0.15≦c≦0.35, and 0.25≦b+c≦0.55). By X-ray diffractometry with a CuKα ray, the lithium-nickel composite oxide exhibits an intensity ratio R ((I012+I006)/I101) of not greater than 0.50, wherein R is the ratio of the sum of the diffraction peak intensity I012on the 012 plane and the diffraction peak intensity I006on the 006 plane to the diffraction peak intensity I101on the 101 plane. The crystallinity of the positive active material of the compositional formula LiaNi1−b−cCobMncO2can be kept high and it is possible to secure good capacity density and cycle life performance.

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