The present invention provides relates to a crosslinkable, proton-conducting membrane having a crosslinked structure, excellent in heat resistance, durability, dimensional stability and fuel barrier characteristics, and showing excellent proton conductivity at high temperature, characterized by comprising (a) an organic/inorganic hybrid structure (A) covalently bonded to 2 or more silicon-oxygen crosslinks and, at the same time, having a carbon atom, and (b) an acid containing structure (B) having an acid group, covalently bonded to a silicon-oxygen crosslink and having an acidic group; and provides a fuel cell using the same membrane. The present invention also provides a method for producing the proton-conducting membrane, comprising steps of preparing a mixture containing an organic/inorganic hybrid, crosslinkable compound (C) and compound (D), the former having 2 or more crosslinkable silyl groups and carbon atoms each being bonded to the silyl group via the covalent bond and the latter having a crosslinkable silyl group and acid group, as the first step; forming the above mixture into a film as the second step; and hydrolyzing/condensing or only condensing the hydrolyzable silyl group contained in the mixture formed into the film to form a crosslinked structure as the third step.
本发明提供了一种交联的、质子导电膜,具有交联结构,优异的耐热性、耐久性、尺寸稳定性和燃料屏障特性,并在高温下表现出优异的质子导电性能。该膜的特征在于包含(a)有机/无机混合结构(A),其与2个或更多
硅氧交联键共价结合,并且同时具有碳原子;以及(b)含有酸基的酸性结构(B),其与
硅氧交联键共价结合,并具有酸性基团。本发明还提供了使用该膜的燃料电池。本发明还提供了一种制备质子导电膜的方法,包括以下步骤:第一步,制备一个混合物,其中包含一个有机/无机混合、可交联化合物(C)和化合物(D),前者具有2个或更多可交联的
硅基团,碳原子通过共价键与
硅基团结合,后者具有可交联的
硅基团和酸基团;第二步,将上述混合物形成成薄膜;第三步,
水解/缩合或仅缩合形成薄膜中含有的可
水解
硅基团,形成交联结构。