Method for making a composite electrode material

Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode

Reexamination Certificate

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C429S221000, C429S218100, C252S182100, C423S306000

Reexamination Certificate

active

11261349

ABSTRACT:
A composite material includes a first phase which comprises LixMy(PO4)zwherein M is at least one metal, y and z are independently 0, and x is less than or equal to 1. The material includes a second phase which has an electronic and/or lithium ion conductivity greater than that of the first phase. The material is prepared by heating a starting mixture which includes lithium, iron, a phosphate ion, and a catalyst in a reducing atmosphere. Also disclosed are electrodes which incorporate the material and batteries which utilize those electrodes as cathodes.

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Delacourt, C et al., The existence of a temperature-driven solid solution in LixFePO4 for 0</=x</=1, Mar. 2005, Nature Publishing Group, vol. 4, pp. 254-260.
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