Discharge reserve for negative impregnated sinter tape electrodes
AssigneeVarta Batterie Aktiengesellschaft
InventorsEckart Buder, Friedrich-Wilhelm Busemann
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Abstract
Negative sintered foil electrodes for gas-tight Ni/Cd storage batteries can be provided with a specific discharge reserve by subjecting them to a partial chemical reduction before they are installed. This is performed upon the moving, impregnated sinter tape by immersing it in or spraying it with a strongly reducing agent dissolved in water or any other solvent, preferably alkali boranate. In a subsequent drying step, the Cd so formed is permanently fixed and protected through intentional surface oxidation.
Claims3
A method for producing negative sintered foil electrodes for gas-tight Ni/Cd storage batteries, which have cadmium hydroxide as the active mass and which have a discharge reserve in the form of a fraction of metallic cadmium, the method comprising
- subjecting the electrode to a partial chemical reduction before installation by immersion or spraying with the solution of a reducing material in an inorganic or organic solvent, the reducing material being an alkali boronate.
Dependencies are inferred from the claim text.