Patent ID: 7026069
Filing Date: 2006-04-11
Classification: C01G,C01P,H01M,Y02E

Abstract:
1. A rechargeable lithium electrochemical system, comprising: a lithium anode; a mixed metal oxide cathode; an LiPF said cathode being composed of a positive, active lithium manganese bismuth mixed metal oxide compound having the general formula Li said mixed metal oxide compound resulting from a solid-state reaction between manganese oxide, a lithium compound and Bi said manganese oxide being selected from the group of manganese oxides consisting of MnO said lithium compound being selected from the group of lithium compounds consisting of Li said mixed metal oxide compound being in solid form and having a reversible region for said subscript x greater than 0.4 and less than 1.0; said cathode providing a sustained specific capacity of about 120 mAhrs/g; said mixed metal oxide compound having a reduced charge transfer impedance due to a catalytic reaction causing said cathode to prevent an overcharge and prevent a phase change; said mixed metal oxide compound, a conductive carbon and a binder being mixed in a predetermined ratio; and said cathode being fully reversible against said lithium compound.