Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1981-05-04
1983-03-22
Edmundson, F.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
204283, 204290R, 204291, 204292, 427122, 427352, 427353, C25B 1102, C25S 1106
Patent
active
043774962
ABSTRACT:
This disclosure is directed to a gas diffusion electrode, e.g., an oxygen (air) electrode, having a conductive, porous, sintered, plaque metal substrate containing generally spherically-shaped anchor site depressions on its active layer-contacting surface; an active layer containing catalyzed or uncatalyzed carbon particles and whose plaque-contacting surface includes anchor portions which interlock with the anchor site depressions and assist in securing the active layer to the plaque substrate, and a hydrophobic backing (wetproofing) layer in contact with the other surface of the active layer. The plaque is made by forming, e.g., by rolling or pressing, the metal powder, preferably silver, containing particulate extractable material on one face or surface thereof into a thin plaque; sintering the plaque containing the extractable material at temperatures of from about 1000.degree. to about 1300.degree. F. for time periods of from about 2 to about 30 minutes and thereafter removing the extractable material to produce a plaque electrode substrate having anchor site depressions in one surface. The active layer material is then deposited, preferably by filtration, on the plaque surface having such depressions followed by depositing the hydrophobic layer, also preferably by filtration.
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Mao et al., J. Electrochem. Soc., vol. 117 (No. 10), pp. 1319-1323, 10/70.
"On the Effect of Various Active Carbon Catalysts on the Behavior of Carbon Gas-Diffusion Air Electrodes: Alkaline Solutions", by I. Iliev et al., Journal of Power Sources, 1 (1976/1977), pp. 35-46, Elsevier Sequoia S.A., Lausanne printed in the Netherlands.
"A Novel Air Electrode", by H. P. Landi et al., Advances in Chemistry Series, (1969) American Chemical Society Publications, pp. 13-23.
Ban Woodrow W.
Diamond Shamrock Corporation
Edmundson F.
Hazzard John P.
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