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Materials and Methods for Autonomous Battery Shutdown

United States Patent Application

20130171484
A1
View the Complete Application at the US Patent & Trademark Office
An autonomous battery shutdown system includes a battery including an anode and a cathode, and an electrolyte composition between the anode and the cathode. The electrolyte composition includes an ionically conductive liquid containing lithium ions, and temperature-sensitive particles including a polymer having a melting temperature between 60.degree. C. and 120.degree. C. When the temperature of the battery exceeds 120.degree. C., the temperature-sensitive particles form an ion barrier that traverses the battery. The resulting shutdown battery may have a specific charge capacity that is more than 98% lower than the specific charge capacity of the original battery.
Baginska, Marta B. (Urbana, IL), Blaiszik, Benjamin J. (Urbana, IL), Esser-Kahn, Aaron (Champaign, IL), Odom, Susan A. (Champaign, IL), Weng, Wei (Woodridge, IL), Zhang, Zhengcheng (Naperville, IL), Sottos, Nancy R. (Champaign, IL), White, Scott R. (Champaign, IL), Moore, Jeffrey S. (Savoy, IL), Amine, Khalil (Oak Brook, IL)
The Board of Trustees of the University of Illinois (Urbana IL)
13/ 489,871
June 6, 2012
FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] This invention was made with government support under contract number(s) DE-AC0206CH11357, ANL 9F 31921, and 392 NSF CHE 09-36888 FLLW ARRA, awarded by the Department of Energy and the National Science Foundation ACC Fellowship. The government has certain rights in the invention.