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Protective coating on positive lithium-metal-oxide electrodes for lithium batteries

United States Patent

May 23, 2006
View the Complete Patent at the US Patent & Trademark Office
Argonne National Laboratory - Visit the Technology Development and Commercialization Website
A positive electrode for a non-aqueous lithium cell comprising a LiMn.sub.2-xM.sub.xO.sub.4 spinel structure in which M is one or more metal cations with an atomic number less than 52, such that the average oxidation state of the manganese ions is equal to or greater than 3.5, and in which 0.ltoreq.x.ltoreq.0.15, having one or more lithium spine oxide LiM'.sub.2O.sub.4 or lithiated spinel oxide Li.sub.1+yM'.sub.2O.sub.4 compounds on the surface thereof in which M' are cobalt cations and in which 0.ltoreq.y.ltoreq.1.
Johnson; Christopher S. (Naperville, IL), Thackeray; Michael M. (Naperville, IL), Kahaian; Arthur J. (Chicago, IL)
The University of Chicago (Chicago, IL)
10/ 353,385
January 28, 2003
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to Contract No. W-31-109-ENG-38 between the U.S. Department of Energy (DOE) and The University of Chicago representing Argonne National Laboratory.