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A Powder Metallurgy Route to Produce Raney-Nickel Electrodes for Alkaline Water Electrolysis

: Bernäcker, C.I.; Rauscher, T.; Büttner, T.; Kieback, B.; Röntzsch, L.


Journal of the Electrochemical Society 166 (2019), No.6, pp.F357-F363
ISSN: 0013-4651
ISSN: 1945-7111
ISSN: 0096-4786
Journal Article, Electronic Publication
Fraunhofer IFAM, Institutsteil Pulvermetallurgie und Verbundwerkstoffe Dresden ()

A powder metallurgy route is described as a promising route to produce highly active Raney-Ni electrodes. An expanded Ni mesh was used as metallic substrate on the surface of which Raney-Ni phases were produced via a heat-treatment step using Al powder at different loads. The overpotential at −300 mA/cm² as well as the active surface area were determined to evaluate the electrodes. The results reveal that a high Al loading is necessary to achieve a stable electrode and a high activity for the hydrogen evolution reaction.