| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a proton-conductive electrolyte membrane having improved acid-resistant solubility that can show improved power generation performance under high-temperature and low-moisture operation conditions of no humidification or a relative humidity of 50% or smaller in a temperature range of 100-300°C, and can maintain improved power generation performance stably for a long time by delaying the dissolution of the electrolyte membrane to acid as compared with a conventional one. <P>SOLUTION: The proton-conductive electrolyte membrane for a fuel cell is composed by dipping inorganic phosphates and organophosphonic acids in polybenzimidazoles. In this case, for repetition structure units for composing the polybenzimidazoles, the total amount of inorganic phosphates and organophosphonic acids ranges from 20 mol% or larger to 2,000 mol% or smaller, and the molar ratio (inorganic phosphates:organophosphonic acids) of the inorganic phosphates to the organophosphonic acids ranges from 5:95 to 90:10. <P>COPYRIGHT: (C)2007,JPO&INPIT |
