Patent ID: 7972744
Filing Date: 2011-07-05
Classification: H01M,Y02E,Y02P

Abstract:
1. A fuel cell comprising: a membrane electrode assembly comprising a monolithic membrane sandwiched between first and second electrodes; said membrane comprising exfoliated aluminosilicate-based cation-exchange material dispersed in an ionically conductive polymer matrix, where the aluminosilicate-based cation-exchange material has cation exchange sites with at least a portion of the sites having Group 1 metal cations, said membrane having first and second exterior opposed surfaces, said membrane having first and second regions adjacent to the first and second exterior opposed surfaces, said first and second regions layers having the exfoliated aluminosilicate-based material disposed therein, and a central layer region disposed between the first and second regions, being substantially free of exfoliated aluminosilicate-based material, wherein the ionically conductive polymer matrix contiguously couples the first and second exterior opposed surfaces, wherein the polymer matrix is a perfluorosulfonate ionomer, and wherein polymer constitutes up to 94 parts by weight based on 100 parts of aluminosilicate-based cation exchange material and polymer matrix.