Effect of LaCoO3 Additive on the Electrochemical Behavior of Zinc Anode in Alkaline Solution

Rabat Boonpong; Attera Worayingyong; Marisa Arunchaiya; Atchana Wongchaisuwat

doi:10.4028/www.scientific.net/MSF.663-665.596

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First Principles Investigation of Geometrical and Electronic Structure of Semiconductor Fe_1-XCo_xSi₂
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HomeMaterials Science ForumMaterials Science Forum Vols. 663-665Effect of LaCoO3 Additive on the Electrochemical...

Effect of LaCoO₃ Additive on the Electrochemical Behavior of Zinc Anode in Alkaline Solution

Abstract:

The utilization of zinc anode for zinc-based battery is limited due to low cycling life, shape change and ZnO passivation on the electrode surface. The electrochemical behavior of zinc anode in the presence of the additives added to the electrodes or the electrolytes have been reported. In this work, LaCoO3 was used as an additive to improve the electrochemical properties of the zinc oxide anode. LaCoO3 synthesized by sol gel method (Schiff base complex) was added to zinc oxide powder (99.9%) with the weight ratio of 1:0.001, 1:0.002 and 1:0.003. The relative ZnO/LaCoO3 ratios were confirmed by particle induced x-ray emission (PIXE) technique.The electrochemical behavior of the ZnO/LaCoO3 electrodes in 6M KOH solution were investigated by voltammetry and electrochemical impedance spectroscopy (EIS). The cyclic voltammogram showed that ZnO/LaCoO3 gave higher anodic current and ZnO passivation delayed. The EIS spectra showed that charge transfer resistances of the ZnO/LaCoO3 anodes due to zinc oxidation were higher than that of ZnO electrode