Verfahren zur Herstellung einer negativen Speicherelektrode für alkalische Akkumulatoren

摘要

In the fabrication of a plastic-bound, negative roll electrode having a copper matrix from a CdO/Cu2O powder mix, which after being pressed or rolled, into a copper mesh is treated with a reducing current in order to generate a filigree, electronically conductive Cu pattern, it is important for the quality of the finished product that, from the CdO and a small amount of binder (PTFE), a granular material is first produced which is then admixed with the Cu2O and the larger remaining amount of the PTFE provided, and that the potentials during the cathodic reduction are maintained at values at which hydrogen generation does not yet take place. Galvanic cells having the electrode combination positive sintered electrode/negative roll electrode come close, in terms of their heavy-current carrying capacity, to conventional cells of the sintered/sintered electrode version.