Patent ID: 7344659

Claim:
An electrochemical cell wherein at least one electrode comprises at least one electrode material comprising a complex oxide corresponding to the general formula A a M m Z z O o N n F f wherein: A comprises an alkaline metal; M comprises at least one transition metal, and optionally at least one a non-transition metal, or mixtures thereof; Z comprises at least one non-metal; O is oxygen; N nitrogen; and F is fluorine; and the coefficients a, m, o, n f≧0 and z≧0 are selected to ensure electroneutrality; wherein said complex oxide is selected from the group consisting of sulfates, phosphates, fluorophosphates, silicates, oxysulfates, oxyphosphates, oxysilicates, and mixtures thereof; wherein said oxide comprises a non powdery deposit of a conductive carbonaceous material on a surface thereof to obtain a substantially regular electric field distribution on the surface of material particles of said complex oxide; wherein said coefficients are selected to avoid oxidation of the conductive carbonaceous material during deposition thereof on said surface; and wherein the complex oxide is LiFePO 4 .