| 摘要 |
A composite electrolyte membrane for decreasing the crossover of polar organic fuel and a fuel cell employing the membrane are provided. The composite electrolyte membrane includes a modified silica in which silicon atoms have substituents as represented by formula 1 and formula 2; and an cation exchange group-containing polymer: <?in-line-formulae description="In-line Formulae" end="lead"?>-R<SUB>1</SUB>-SO<SUB>3</SUB>X Formula 1 <?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>-R<SUB>2</SUB>-S-S-R<SUB>3</SUB>- Formula 2 <?in-line-formulae description="In-line Formulae" end="tail"?> wherein, R<SUB>1 </SUB>is an alkylene group with 2-7 carbon atoms, X is a hydrogen atom or an alkali metal, R<SUB>2 </SUB>and R<SUB>3 </SUB>are each independently an alkylene group with 2-7 carbon atoms.
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