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High temperature lithium cells with solid polymer electrolytes

United States Patent

9,590,268
March 7, 2017
View the Complete Patent at the US Patent & Trademark Office
Electrochemical cells that use electrolytes made from new polymer compositions based on poly(2,6-dimethyl-1,4-phenylene oxide) and other high-softening-temperature polymers are disclosed. These materials have a microphase domain structure that has an ionically-conductive phase and a phase with good mechanical strength and a high softening temperature. In one arrangement, the structural block has a softening temperature of about 210.degree. C. These materials can be made with either homopolymers or with block copolymers. Such electrochemical cells can operate safely at higher temperatures than have been possible before, especially in lithium cells. The ionic conductivity of the electrolytes increases with increasing temperature.
Yang; Jin (Pleasanton, CA), Eitouni; Hany Basam (Oakland, CA), Singh; Mohit (Berkeley, CA)
Seeo, Inc. (Hayward, CA)
13/ 698,665
May 19, 2011
STATEMENT OF GOVERNMENT SUPPORT The invention described and claimed herein was made in part utilizing funds supplied by the U.S. Department of Energy under Contract No. DE-OE0000223. The Government has certain rights in this invention.