Fuel cell electrolyte
First Claim
1. A fuel cell having an electrolyte composition comprising one or more phosphonic acids of the formula ##STR10## wherein m represents an integer from 1 to 3, n represents O or the integer 1, and R is a moiety derived from hydroxyalkyl, alkyl, phenyl, alkylphenyl, vinyl, halophenyl, halomethylphenyl, amine, ammonia and ##STR11##
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Abstract
This invention relates to a novel intermediate temperature fuel cell electrolyte, fuel cells containing this electrolyte and a process for operating these fuel cells.
The fuel cell electrolyte composition comprises one or more phosphonic acids. Typical phosphonic acids are compounds of the formula ##STR1## wherein R is a moiety derived from hydroxyalkyl, alkyl, phenyl, alkylphenyl, vinyl, haloalkyl, halophenyl, halomethylphenyl, vinyl, amine, ammonia and ##STR2## and m represents an integer from 1 to 3 and n represents 0 (zero) or the integer 1. This electrolyte composition can further comprise phosphoric acid.
The fuel cell electrolyte composition can include a gelling agent and can be effectively used in fuel cells wherein the fuel is hydrogen, the oxidizer is oxygen and the operating temperature is between about 100° C. and 250° C.
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Citations
19 Claims
- 1. A fuel cell having an electrolyte composition comprising one or more phosphonic acids of the formula ##STR10## wherein m represents an integer from 1 to 3, n represents O or the integer 1, and R is a moiety derived from hydroxyalkyl, alkyl, phenyl, alkylphenyl, vinyl, halophenyl, halomethylphenyl, amine, ammonia and ##STR11##
- 3. A fuel cell having an electrolyte composition comprising one or more phosphonic acids of the formula ##STR12## wherein R'"'"' is hydroxyalkyl, alkyl, phenyl, alkylphenyl, vinyl, haloalkyl, halophenyl and halomethylphenyl.
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17. A fuel cell capable of operating at a temperature from about 100°
- C. to about 250°
C. containing an electrolyte comprising one or more phosphonic acids of the formula ##STR13## wherein R'"'"' is hydroxyalkyl, alkyl, phenyl, alkylphenyl, vinyl, haloalkyl, halophenyl and halomethylphenyl which comprises an oxidizer and a gaseous fuel. - View Dependent Claims (18, 19)
- C. to about 250°
Specification