Patent Number: 7,824,802

Title: Method of preparing a composite cathode active material for rechargeable electrochemical cell

Abstract: A method of preparing a composite cathode active material having superior cell characteristics includes mixing and milling starting material, carbon and an organic complexing agent. The mixture is heated at a first temperature in an inert atmosphere to form a composite precursor, and then the precursor is ground and heated at a second temperature in an inert atmosphere to produce a carbon-containing composite cathode material having high electronic conductivity. The said composite cathode has a general formula of LiFe.sub.1-xM.sub.xPO.sub.4--C, within 0.ltoreq.x<1, M is selected from the group consisting of Co, Ni, V, Cr, Mn and a mixture thereof.

Inventors: Zhang; Shengshui (Olney, MD), Xu; Kang (North Potomac, MD), Jow; T. Richard (Potomac, MD)

Assignee: The United States of America as represented by the Secretary of the Army

International Classification: H01M 4/58 (20100101); H01M 4/60 (20100101); C01B 15/16 (20060101)

Expiration Date: 2019-11-02 0:00:00