초록 ▼

A proton exchange membrane comprising a perfluorosulfonic acid having silica particles embedded therein at a concentration of 0.01 to 5% by weight, said particles having a dimension of 0.001 to 10 micrometers, the membrane having a crystalline phase and an amorphous phase in a ratio adjusted by cont

A proton exchange membrane comprising a perfluorosulfonic acid having silica particles embedded therein at a concentration of 0.01 to 5% by weight, said particles having a dimension of 0.001 to 10 micrometers, the membrane having a crystalline phase and an amorphous phase in a ratio adjusted by controlled thermal treatment at a temperature higher than the glass transition temperature, an electrochemical cell containing said membrane and a process for oxidizing a fuel in said electrochemical cell.

대표청구항 ▼

[ What is claimed is:] [1.] A proton exchange membrane comprising a perfluorosulfonic acid having silica particles therein in a concentration of between 0.01 and 50% by weight, said particles having dimensions between 0.001 and 10 micrometers, wherein the said membrane has both an amorphous and a cr

[ What is claimed is:] [1.] A proton exchange membrane comprising a perfluorosulfonic acid having silica particles therein in a concentration of between 0.01 and 50% by weight, said particles having dimensions between 0.001 and 10 micrometers, wherein the said membrane has both an amorphous and a crystalline phase and the ratio thereof is adjusted by a controlled thermal treatment at a temperature higher than the glass transition temperature to increase the amount of crystalline phase in the membrane. [4.] A process for oxidizing a fuel selected from the group consisting of methanol, ethanol and hydrogen derived from oxidation of hydrocarbons and alcohols, comprising introducing, at a temperature above 100.degree. C. into an electrochemical cell comprising anodes and cathodes separated by membranes of claim 1 the fuel at the anode and oxygen at the cathode while impressing a direct electric current thereon.