Lithium-cobalt composite oxide, process for its production,...

Details Lithium-cobalt composite oxide, process for its production,... Lithium-cobalt composite oxide, process for its production,...

2007-12-11

2007-12-11

Bos, Steven (Department: 1754)

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C252S519100, C252S519120, C252S519150, C429S231300

Reexamination Certificate

active

10743479

ABSTRACT:
A composite oxide suitable for an active material of a positive electrode for a lithium secondary cell which can be used in a wide range of voltage, has a large electric capacity and excellent low temperature performance and is excellent in the durability for charge-discharge cycles and highly safe, a process for its production, and a positive electrode and a cell employing it, are presented.The composite oxide is a lithium-cobalt composite oxide which is represented by the formula LiCo1-xMxO2, (wherein 0≦x≦0.02 and M is at least one member selected from the group consisting of Ta, Ti, Nb, Zr and Hf), and which has a half-width of the diffraction peak for (110) face at 2θ=66.5±1°, of from 0.070 to 0.180°, as measured by the X-ray diffraction using CuKαas a ray source.

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