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Process to produce lithium-polymer batteries

United States Patent

5,772,934
June 30, 1998
View the Complete Patent at the US Patent & Trademark Office
A polymer bonded sheet product suitable for use as an electrode in a non-aqueous battery system. A porous electrode sheet is impregnated with a solid polymer electrolyte, so as to diffuse into the pores of the electrode. The composite is allowed to cool, and the electrolyte is entrapped in the porous electrode. The sheet products composed have the solid polymer electrolyte composition diffused into the active electrode material by melt-application of the solid polymer electrolyte composition into the porous electrode material sheet. The solid polymer electrolyte is maintained at a temperature that allows for rapid diffusion into the pores of the electrode. The composite electrolyte-electrode sheets are formed on current collectors and can be coated with solid polymer electrolyte prior to battery assembly. The interface between the solid polymer electrolyte composite electrodes and the solid polymer electrolyte coating has low resistance.
MacFadden; Kenneth Orville (Highland, MD)
W. R. Grace & Co.-Conn. (New York, NY)
08/ 653,173
May 24, 1996
This invention was made with Government support under Contract DE-FC02-91CE50336 awarded by the United States Department of Energy. The Government has certain rights in this invention.