Patent Number: 7,732,100

Title: Solid polymer electrolyte for lithium ion battery and lithium ion battery

Abstract: The invention provides a novel lithium-ion battery electrolyte which is produced by adding an aluminate ester compound as a plasticizer in a solid polymer electrolyte. The lithium-ion battery solid polymer electrolyte of the present invention comprises a lithium ion source, an organic polymer compound, and one or more kinds of aluminate ester compounds represented by the general formula ##STR00001## where R.sub.1, R.sub.2, and R.sub.3 each independently represent a straight-chain or branched-chain lower alkyl group having one to eight carbon atoms, an alkenyl group having three to six carbon atoms, acryloyl, or methacryloyl; OA.sub.1, OA.sub.2, and OA.sub.3 each independently represent an oxyalkylene group having two to four carbon atoms; l represents a number from 1 to 100; and m and n each independently represent a number from 0 to 100.

Inventors: Wakihara; Masataka (Tokyo, JP), Seki; Masayuki (Kawasaki, JP), Mita; Hidehisa (Kawasaki, JP)

Assignee: Tokyo Institute of Technology

International Classification: H01M 6/18 (20060101)

Expiration Date: 2022-06-08 0:00:00