US 7,541,107 B2
Solid polyelectrolyte, assembly of membrane and electrodes, amd fuel cell
Tohru Koyama, Hitachi (Japan); Toshiyuki Kobayashi, Tokai (Japan); Kenji Yamaga, Hitachi (Japan); Tomoichi Kamo, Tokai (Japan); and Kazutoshi Higashiyama, Naka (Japan)
Assigned to Hitachi, Ltd., Tokyo (Japan)
Filed on Aug. 19, 2004, as Appl. No. 10/921,268.
Application 10/921268 is a continuation of application No. 10/208094, filed on Jul. 31, 2002, granted, now 6,893,764.
Claims priority of application No. 2001-289493 (JP), filed on Sep. 21, 2001.
Prior Publication US 2005/0031930 A1, Feb. 10, 2005
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 8/10 (2006.01); H01M 6/18 (2006.01); B01J 49/00 (2006.01); C08J 5/20 (2006.01)
U.S. Cl. 429—33  [429/314; 429/317; 521/27] 18 Claims
OG exemplary drawing
 
1. A solid polymer electrolyte membrane obtained from a solid polymer electrolyte comprising a polyether ether sulfone used as an electrolyte, said polyether ether sulfone having sulfoalkyl groups bonded thereto and represented by the formula [1]:
—(CH2)n—SO3H  [1]
wherein n is an integer of 1 to 6.