US 7,517,615 B2
Gel electrolyte, process for producing the same, and use thereof
Yoshihiro Uetani, Ibaraki (Japan); Shuuhei Murata, Ibaraki (Japan); and Keisuke Kii, Ibaraki (Japan)
Assigned to Nitto Denko Corporation, Osaka (Japan)
Filed on Jun. 05, 2006, as Appl. No. 11/446,258.
Application 11/446258 is a division of application No. 10/383071, filed on Mar. 07, 2003, granted, now 7,097,940.
Claims priority of application No. P. 2002-086440 (JP), filed on Mar. 26, 2002.
Prior Publication US 2006/0222956 A1, Oct. 05, 2006
Int. Cl. H01M 6/14 (2006.01)
U.S. Cl. 429—303  [429/309; 429/300] 2 Claims
 
1. A process for producing a gel electrolyte which comprises heating or irradiating with actinic radiation a solution containing an electrolyte salt, a solvent for the electrolyte salt, and a bifunctional (meth)acrylate represented by the following formula (I):

OG Complex Work Unit Drawing
wherein R represents a divalent group selected from:
(a) an alkylene group,
(b) a divalent group represented by the following general formula (II):

OG Complex Work Unit Drawing
wherein R2 represents an alkyl group, and R3 and R4 each independently represents an alkylene group,
(c) a xylylene group, and
(d) a divalent group represented by the following general formula (III):

OG Complex Work Unit Drawing
R1 represents a hydrogen atom or a methyl group,
to polymerize the bifunctional (meth)acrylate, thereby forming a crosslinked polymer and forming a gel in which the electrolyte salt and the solvent are held in a matrix comprising the crosslinked polymer.