Hydrogen electrode for a fuel cell

Details Hydrogen electrode for a fuel cell Hydrogen electrode for a fuel cell

1983-12-15

1986-04-29

LeFevour, Charles F.

Chemistry: electrical current producing apparatus, product, and

Having earth feature

429 44, 296235, H01M 486

Patent

active

045857113

ABSTRACT:
A hydrogen electrode and the method of making the electrodes usable in a fuel cell comprising a perforated nickel foil current collector, the back side of which is sealed with a semi-permeable membrane of polytetrafluoroethylene (PTFE) with a thickness of 50 .mu.m and a pore diameter of 0.2 .mu.m. The front side is sealed with an electrocatalytic layer of about 25 .mu.m thickness. The electrocatalytic layer contains 75%, by weight, catalyst (carbon particles coated with a layer of catalyzing platinum) with a platinum loading of 0.25-0.6 mg/cm.sup.2. The platinum-covered carbon black is dispersed and embedded as individual but touching granules in strands of PTFE composing 25% of the layer. The porosity of the layer is 80% with a mean volume pore diameter of 10 .mu.m. The strands are obtained by roll compaction of granular PTFE.

REFERENCES:
patent: 3425875 (1969-02-01), Adlhart et al.
patent: 3704171 (1972-11-01), Landi
patent: 4058482 (1977-11-01), Baris et al.
patent: 4337140 (1982-06-01), Solomon
patent: 4339325 (1982-07-01), Solomon et al.
patent: 4440617 (1984-04-01), Solomon

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