Electrode material for lithium secondary battery including...

Details Electrode material for lithium secondary battery including... Electrode material for lithium secondary battery including...

2004-06-21

2009-11-10

Crepeau, Jonathan (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S223000, C429S231100, C429S231950

Reexamination Certificate

active

07615313

ABSTRACT:
An electrode material for a lithium secondary battery which includes particles each having a central portion and a surface portion covering the surface of the central portion. A distance from a center to an outermost surface of the particle is occupied 80 to 99% by the central portion and 1 to 20% by the surface portion. The central portion includes LiM1-aDaO2having an α-NaFeO2structure, and the surface portion includes LiM1-bEbO2having an α-NaFeO2structure. (M is C or Ni; D is a transition metal element or Al replacing a part of Co or Ni as M; E is a metal element replacing a part of Co or Ni as M; and M is not the same as D or E.) The following relationships are satisfied in the central portion, in terms of atomic ratio: D/(M+D+E)<0.05 and E/(M+D+E)<0.05.

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