초록 ▼

A matrix for holding the electrolyte within a phosphoric acid fuel cell is made from silicon carbide and a binder of polyestersulfone. Preferably the matrix consists of 10-20 weight percent polyethersulfone with a balance of silicon carbide. The matrix has improved strength, wettability and bubble p

A matrix for holding the electrolyte within a phosphoric acid fuel cell is made from silicon carbide and a binder of polyestersulfone. Preferably the matrix consists of 10-20 weight percent polyethersulfone with a balance of silicon carbide. The matrix has improved strength, wettability and bubble pressure compared to the best known prior art matrix.

대표청구항 ▼

A fuel cell comprising: a pair of spaced apart gas diffusion electrodes; a porous electrolyte retaining matrix confined in the space between said electrodes, said matrix having a porosity of at least 38 percent and consisting essentially of 70 to 90 weight percent silicon carbide and a balance of hy

A fuel cell comprising: a pair of spaced apart gas diffusion electrodes; a porous electrolyte retaining matrix confined in the space between said electrodes, said matrix having a porosity of at least 38 percent and consisting essentially of 70 to 90 weight percent silicon carbide and a balance of hydrophilic polyethersulfone as a binder; and phosphoric acid electolyte disposesd within said matrix, wherein said matrix has the characteristic that it remains physically intact for at least 17,000 hours of fuel cell operation at 375°F.