Manufacturing of Zinc Powder with Dendritic Microstructure for Zinc-Air Battery by Electrodeposition

摘要

Fine zinc powder with dendritic microstructure is applied in preparation of cathode of zinc-air battery. Based on a series of experiments, the electrodeposition was determined for the preparation of zinc powder with dendritic microstructure in the solution system of Zn~(2+)-(NH_4)~+-(SO_4)~(2-)-H_2O. The main factors affecting the process such as current density, temperature, concentration of reactants and schedule of brushing powder were investigated comprehensively. The optimal process conditions are 15g/L Zn~(2+), 30～40g/L(NH_4)_2SO_4, 800 Am~(-2)current density at 30°C,with the schedule of brushing powder is 2 minutes. Based on the test results the optimal conditions, fine zinc powder with dendritic microstructure can be fabricated by electrodeposition.