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US Patent 7875204 Flame retarding polymer electrolyte composition containing maleimides

Patent 7875204 was granted and assigned to Industrial Technology Research Institute on January, 2011 by the United States Patent and Trademark Office.

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Current Assignee
Industrial Technology Research Institute
Industrial Technology Research Institute
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7875204
Date of Patent
January 25, 2011
Patent Application Number
11889817
Date Filed
August 16, 2007
Patent Citations Received
‌
US Patent 12119452 All-inorganic solvents for electrolytes
3
Patent Primary Examiner
‌
Stanley Silverman
Patent abstract

A flame retarding polymer electrolyte composition containing maleimides includes a modified maleimide; a lithium salt; and at least one ionic solution in a ratio of at least 2 wt % relative to the total weight of the composition. By using the hyperbranched dendrimer-like structure of the modified maleimide as grafted skeleton for polymer electrolytes, the electrolyte composition can encapsulate an electrolytic solution continuously, thus preventing the exudation of the electrolytic solution and increasing the stability of lithium ionic conduction. Since the ionic solution is nonflammable, the safety of batteries are further enhanced when the polymer electrolyte composition is used as polymer electrolyte for a lithium secondary battery.

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