Solid polymer electrolyte and method of preparation

Oh, Bookeun; Amine, Khalil; Vissers, Donald R.

Solid polymer electrolyte and method of preparation

Patent · Tue Jun 05 04:00:00 EDT 2007

OSTI ID:1531532

Oh, Bookeun; Amine, Khalil; Vissers, Donald R.

Disclosed is an improved solid electrolyte made of an interpenetrating network type solid polymer comprised of two compatible phases: a crosslinked polymer for mechanical strength and chemical stability, and an ionic conducting phase. The highly branched siloxane polymer of the present invention has one or more poly(ethylene oxide) (“PEO”) groups as a side chain. The PEO group is directly grafted to silicon atoms in the siloxane polymer. This kind of branched type siloxane polymer is stably anchored in the network structure and provides continuous conducting paths in all directions throughout the IPN solid polymer electrolyte. Also disclosed is a method of making an electrochemical cell incorporating the electrolyte. A cell made accordingly has an extremely high cycle life and electrochemical stability.

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Research Organization:: Quallion LLC, Sylmar, CA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: W-31109-ENG-38

Assignee:: Quallion LLC (Sylmar, CA)

Patent Number(s):: 7,226,702

Application Number:: 10/496,230

OSTI ID:: 1531532

Country of Publication:: United States

Language:: English

References (37)

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