Synthesis of novel fluorinated phosphonic and phosphinic acid electrolytes for phosphoric acid fuel cells. Final report, May 1985-December 1988
New methodology has been developed for the preparation of difluoromethylene phosponate derivatives, perfluorinated bis-phosphonates, and mixed phosphonate-sulfonates. The phosphonates were converted to the respective difluoromethylene phosphonic acids, perfluorinated bis-phosphonic acids, and a mixed fluorinated phosphonic-sulfonic acid. The acids were evaluated as a fuel cell electrolyte. The mono phosphonic acids wetted the Teflon electrode and were found to be unsuitable electrolyte candidates. The bis-phosphonic acids and the mixed phosphonic-sulfonic acid did not wet the Teflon electrode, dissolved more oxygen than phosphonic acid, exhibited excellent thermal stability, and were found to warrant additional study as fuel cell electrolytes.
- Research Organization:
- Iowa Univ., Iowa City, IA (USA). Dept. of Chemistry
- OSTI ID:
- 5779804
- Report Number(s):
- PB-89-194120/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
300503* -- Fuel Cells-- Materials
Components
& Auxiliaries
ACID ELECTROLYTE FUEL CELLS
DIRECT ENERGY CONVERTERS
DOCUMENT TYPES
ELECTROCHEMICAL CELLS
ELECTROLYTES
ELEMENTS
FUEL CELLS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
NONMETALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN
PHOSPHINIC ACIDS
PHOSPHONATES
PHOSPHONIC ACIDS
PHOSPHORIC ACID
PROGRESS REPORT
STABILITY
SULFONATES
SULFONIC ACIDS
SYNTHESIS