Electric accumulator cell with at least one dissoluble electrode
First Claim
1. In an electric accumulator cell including at least one electrode formed of an inert conducting material insoluble in said electrolyte and an active metal which on discharge formed a chemical compound soluble in the electrolyte, the improvement which comprises forming said electrode of a central conducting layer having an outer layer disposed on both planar sides thereof, the planar sides of the outer layers being smaller than the planar sides of the central layer so that the central layer has a bare portion about its periphery, at least part of the bare portion being covered with an electrically insulating material, the width of the bare portion between the insulating material and the outer layer being at least twice the thickness of the outer layer, each layer being composed of an inert conducting material insoluble in said electrolyte.
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Abstract
An improvement in electric accumulator cells having a dissoluble electrode (e.g., a zinc electrode) and a counter-electrode (e.g., nickel electrode) is disclosed. The dissoluble electrode is formed by a central layer having outer layers disposed on either plane side thereof. The outer layers are generally smaller in planar size than the central layer and preferably all of the layers are porous, perforated or netlike. The multi-layer electrode has particular utility in a cell in which the dissoluble electrode and/or separator disposed between the dissoluble electrode and counter-electrode are vibrated in the plane of the electrode. Dendrite growth and shaping of the deposited active material are substantially minimized and improved cell life is obtained.
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Citations
14 Claims
- 1. In an electric accumulator cell including at least one electrode formed of an inert conducting material insoluble in said electrolyte and an active metal which on discharge formed a chemical compound soluble in the electrolyte, the improvement which comprises forming said electrode of a central conducting layer having an outer layer disposed on both planar sides thereof, the planar sides of the outer layers being smaller than the planar sides of the central layer so that the central layer has a bare portion about its periphery, at least part of the bare portion being covered with an electrically insulating material, the width of the bare portion between the insulating material and the outer layer being at least twice the thickness of the outer layer, each layer being composed of an inert conducting material insoluble in said electrolyte.
Specification