Abstract: Various gasket compositions and constructions adapted to be embodied in a phosphoric acid type fuel cell are provided, each of which is effective in sealing the outer edges of the electrodes and the electrolyte matrix of the fuel cell unit. In one embodiment, the gasket comprised of fluoric synthetic rubber which does not include metal oxide or metal hydroxide so that it will not deteriorate in the presence of the phosphoric acid.In another embodiment, a sealing arrangement is provided which is adapted to be embodied in a fuel cell and includes a gasket and bonds positioned between the electrodes and the gasket. The bond is comprised of fluoric synthetic rubber and has a modulus of elasticity larger than the modulus of elasticity of the gasket so as to minimize deterioration of the bond.In a third embodiment, a two-piece gasket is provided for use with a fuel cell, preferably of the phosphoric acid type.

Abstract: Various gasket compositions and constructions adapted to be embodied in a phosphoric acid type fuel cell are provided, each of which is effective in sealing the outer edges of the electrodes and the electrolyte matrix of the fuel cell unit. In one embodiment, the gasket comprised of fluoric synthetic rubber which does not include metal oxide or metal hydroxide so that it will not deteriorate in the presence of the phosphoric acid.In another embodiment, a sealing arrangement is provided which is adapted to be embodied in a fuel cell and includes a gasket and bonds positioned between the electrodes and the gasket. The bond is comprised of fluoric synthetic rubber and has a modulus of elasticity larger than the modulus of elasticity of the gasket so as to minimize deterioration of the bond.In a third embodiment, a two-piece gasket is provided for use with a fuel cell, preferably of the phosphoric acid type.

Abstract: A separator for use in a fuel cell having a fluoric synthetic resin within the pores of a separator base which makes the separator impermeable to reformed fuel and air. A process for manufacturing such a separator is also provided wherein the pores of the separator base are impregnated with fluoric synthetic resin, the base in dried, excess resin is removed from the base, and the resin within the separator pores is melted, to form a hardened fluoric synthetic resin within the separator base pores to prevent the reformed fuel and air from permeating the separator.