Chemistry: electrical current producing apparatus – product – and – Having earth feature
Patent
1979-07-30
1981-11-17
Konopka, P. E.
Chemistry: electrical current producing apparatus, product, and
Having earth feature
204242, 204290R, 204294, 2524253, 427115, 429 44, H01M 498, H01M 496, H01M 488, C25B 1106
Patent
active
043012183
ABSTRACT:
A hydrogen electrode for batteries or galvanic cells in which a first section of the electrode has relatively large pores and serves for the transport of hydrogen and a second section with relatively small pores containing Raney-nickel catalyst. According to the invention, the electrode consists of a metallized fibrous substrate, for example a felt of carbon or textile fibers, with relatively large intrinsic porosity. The Raney-nickel is introduced into this felt from the outside by one of a variety of methods, for example immersion in a vibrating powder bed, by suction of a liquid suspension of Raney-nickel powder or by the application of a paste containing Raney-nickel or a starting alloy therefor. Preferably, the fibrous substrate consists of a number of layers having a preferred fiber orientation, in which at least one of the layers is so turned that the orientation of the fibers is different from that of the surrounding layers, thereby impeding the penetration of Raney-nickel during the manufacture and constituting a zone free from Raney-nickel and of high porosity to serve as a transport layer for hydrogen. A number of examples is presented.
REFERENCES:
patent: 3471336 (1969-10-01), Sturm et al.
patent: 3480538 (1969-11-01), Sturm
patent: 3791872 (1974-02-01), Sturm et al.
patent: 3793084 (1974-02-01), Marchetto
patent: 3912538 (1975-10-01), Dews et al.
patent: 4145482 (1979-03-01), Von Benda
patent: 4167607 (1979-09-01), De Nora et al.
patent: 4215184 (1980-07-01), Gutmann et al.
"Brennstoffelemente"--VDI Verlag GmbH Dusseldorf (1971)--p. 49.
Deutsche Automobilgesellschaft mbH
Konopka P. E.
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