Patent ID: 7303830
Filing Date: 2007-12-04
Classification: B01D,C08G,C08L,H01B,H01M,Y02E

Abstract:
1. A fuel cell, wherein said fuel cell is powered by direct fuel and wherein said fuel cell has a polymer electrolyte membrane which includes a semi-crystalline polymer having a level of crystallinity of at least 0.5%, wherein said semi-crystalline polymer is one having a moiety of formula and/or a moiety of formula and/or a moiety of formula wherein at least some of the units I, II and/or III are functionalized to provide ion-exchange sites; wherein the phenyl moieties in units I, II, and III are independently optionally substituted and optionally cross-linked; wherein said material is crystallisable and/or semi-crystalline; and wherein m,r,s,t,v,w and z independently represent zero or a positive integer, E and E′ independently represent an oxygen or a sulphur atom or a direct link, G represents an oxygen or sulphur atom, a direct link or a —O-Ph-O— moiety where Ph represents a phenyl group and Ar is selected from one of the following moieties (i)* or (i) to (x) which is bonded via one or more of its phenyl moieties to adjacent moieties