Abstract:
PURPOSE: A composite membrane is provided to improve ion conductance and a mechanical property using a compound with improved thermal stability and ion transfer ability. CONSTITUTION: A compound has silsesquioxane and a group of chemical formula 1 is directly connected to one or more silsesquioxane silicon. A composition contains the compound and a conductive polymer. A complex contains a reactant of the composition. A composite membrane contains the complex. An electrode contains the composition and the complex. A fuel cell contains a cathode, an anode, and an electrolyte membrane inserted between the cathode and the anode. The electrolyte membrane is the composite membrane.