Abstract
An anhydrous proton conductor, -doped , was composed by 1,8-bis(triethoxysilyl)octane (TES-Oct) and 3-(trihydroxysilyl)-1-propanesulfonic acid and was characterized by structural and electrochemical analysis. The composite membrane with showed high proton conductivities of or more between 150 and in unhumidified air. The packing of the particles in the matrix was relatively uniform, with no formation of pinholes observed. Fuel cell tests verified that the open-circuit voltage was maintained at a constant value of regardless of the electrolyte thickness , while the Ohmic resistance was decreased to by reducing the electrolyte thickness to . The peak power densities achieved with unhumidified and air were at , at , and at . Furthermore, fuel cell performance was improved by hot-pressing an intermediate layer consisting of , , TES-Oct, and between the electrolyte and cathode.
Published Version
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