SYNTHESIS STRATEGY TOWARD MICROSPHERIC CARBON COATED OFF-STOICHIOMETRIC LITHIUM-IRON-PHOSPHORUS COMPOUND MATERIALS

摘要

A cathode active material represented by the formula, LiFexPO4/C, wherein 0.9≦̸x<1, preferably 0.96≦̸x<1, which was obtained from carbon pre-coated off-stoichiometric FexPO4, wherein 0.9≦̸x<1, preferably 0.96≦̸x<1. The materials may be double-carbon-coated particles obtained by carbon coating a mixture of a lithium component and FexPO4/C sub-particles, wherein the FexPO4/C sub-particles may be obtained by carbon coating FexPO4.