Phosphoric acid fuel cell

Details Phosphoric acid fuel cell Phosphoric acid fuel cell

1992-06-25

1994-09-06

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Having earth feature

429 34, H01M 822

Patent

active

053447220

ABSTRACT:
A series of modified phosphoric acid electrolytes containing fluorinated carbon compounds and silicone fluids as additives are disclosed. The modified electrolytes can improve the fuel cell performance due to the enhanced oxygen reduction kinetics. These additives are, preferably, potassium perfluorohexanesulphonate (C.sub.6 F.sub.13 KO.sub.3 S), potassium nonafluorobutanesulphonate (C.sub.4 F.sub.9 KO.sub.3 S), perfluorotributylamine [(C.sub.4 F.sub.9).sub.3 N] and polymethylsiloxanes [(--Si(CH.sub.3).sub.2 O--).sub.n ]. The additives are added in an amount of 0.1-5 wt % with respect to the phosphoric acid electrolyte.

REFERENCES:
patent: 4639401 (1987-01-01), Jackovitz et al.
patent: 4780954 (1988-11-01), Kato
Chemical Abstract, vol. 109 (14), 113411x. 1988.
J. Electrochem. Soc. Electrochemical Science and Technology, vol. 133 (11), pp. 2262-2267, Nov. 1986.

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