Suppression of Dendrite Formation of Zinc Electrodes by the Modification of Anion-Exchange Ionomer

Abstract

Zinc oxide electrodes modified with an anion-exchange ionomer (AEI) are fabricated to suppress the dendrite formation of metallic zinc deposition. Charge-discharge measurements show that the discharge capacities and efficiencies of AEI-modified ZnO electrodes are superior to those of bare ZnO electrodes. These improvements are explained by the selective ion permeation through the AEI films. In addition, we demonstrate that the AEI-modified ZnO electrodes work well as a rechargeable negative electrode in an alkaline solution which contains no ZnO additive.