ELECTROLYTE MEMBRANE FOR SOLID POLYMER FUEL CELL, METHOD FOR PRODUCING SAME AND MEMBRANE ELECTRODE ASSEMBLY FOR SOLID POLYMER FUEL CELL

摘要

An electrolyte membrane containing cerium ions and composed of a cation-exchange membrane which is made of a polymer compound having a cation-exchange group is used as an electrolyte membrane for solid polymer fuel cells. When the cation-exchange membrane has sulfonic acid groups, cerium ions are preferably contained in an amount of 0.3-20% relative to the -SO3- groups contained in the cation- exchange membrane, and for example, the sulfonic acid groups are ion exchanged with the cerium ions. Consequently, there can be provided an electrolyte membrane for solid polymer fuel cells which enables to generate electricity at high energy efficiency and exhibits high power generation performance regardless of the dew point of a supply gas. This electrolyte membrane for solid polymer fuel cells also enables to stably generate electricity for a long time. ® KIPO & WIPO 2007