Composition, composite prepared from the composition, electrode using the composition or the composite, composite membrane including the composite, and fuel cell including the composite membrane

A composition comprising at least one of compounds represented by Formula 1 and a cross-linkable compound:

• wherein, in Formula 1,
• a is 0, 1, or 2;
• b is 0, 1, 2, 3, or 4, provided that a+b is 1, 2, 3, 4, or 5, and b−a is greater than or equal to 0;
• and
• each R is independently a substituted or unsubstituted C1-C40 alkoxy group, a substituted or unsubstituted C2-C40 alkenyl group, a substituted or unsubstituted C2-C40 alkynyl group, a substituted or unsubstituted C6-C40 aryl group, a substituted or unsubstituted C6-C40 aryloxy group, a substituted or unsubstituted C2-C40 heteroaryl group, a substituted or unsubstituted C2-C40 heteroaryloxy group, a substituted or unsubstituted C4-C40 carbocyclic group, a substituted or unsubstituted C4-C40 carbocyclic oxy group, a substituted or unsubstituted C2-C40 heterocyclic group, a halogen atom, a hydroxyl group, or a cyano group;
• and
• wherein the at least one of compounds represented by Formula 1 comprises at least one of compounds represented by Formula 2 or at least one of compounds represented by Formula 3:
• wherein in Formula 2, R is a substituted or unsubstituted C10-C30 alkenyl group, or a substituted or unsubstituted C10-C30 alkynyl group;
• wherein, in Formula 3, R is a substituted or unsubstituted C10-C30 alkyl group, a substituted or unsubstituted C10-C30 alkenyl group, or a substituted or unsubstituted C10-C30 alkynyl group.