Positive electrode active material for lithium secondary...

Details Positive electrode active material for lithium secondary... Positive electrode active material for lithium secondary...

2008-07-01

2008-07-01

Kopec, Mark (Department: 1796)

Compositions

Electrically conductive or emissive compositions

Metal compound containing

C358S001150, C423S593100, C423S599000, C429S062000, C429S137000, C429S217000, C429S221000, C429S223000, C429S231100, C429S231950

Reexamination Certificate

active

07393476

ABSTRACT:
A positive active material for lithium secondary batteries, includes a composite oxide including an oxide which is represented by the composite formula LixMnaNibCocO2and has an α-NaFeO2structure, and an impurity phase including Li2MnO3. The values a, b, and c are within such a range that in a ternary phase diagram showing the relationship among these, (a, b, c) is present on the perimeter of or inside the quadrilateral ABCD defined by point A (0.5, 0.5, 0), point B (0.55, 0.45, 0), point C (0.55, 0.15, 0.30), and point D (0.15, 0.15, 0.7) as vertexes, and 0.95<x/(a+b+c)<1.35.

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