Synthesis of nano divalent silver oxide for using in primary zinc-silver oxide battery

Subject Areas : journal of New Materials

رحیم Eqra ¹ (استادیار پژوهشکده مکانیک، پژوهشگاه فضایی ایران)
M. M Loghavi ² (پژوهشگر پژوهشکده مکانیک، پژوهشگاه فضایی ایران)

Received: 2016-04-06 Accepted : 2018-01-29 Published : 2017-11-22

Keywords: synthesis, Battery, highrate discharge, nano silver oxide,

Abstract :

In the present study, the effect of particle size of divalent silver oxide has been studied on the electrochemical performance of cathode electrode in the primary zinc-silver oxide battery. Chemical deposition methods were used to produce the powder and the effective parameters in these methods were studied. These include parameters such as concentration, type and order of addition of reactants in the powder production process, addition of surfactant, reaction time and the effect of powder milling by planetary ball mill. X-ray diffraction spectrometer was used to confirm the divalent silver oxide synthesis.The morphology and size of the particles were analysed by scanning electron microscope. The electrodes were prepared by pasting method. Single cells were discharged using constant current of 20 A to evaluate the electrochemical efficiency of produced powders. Single cells contained two zinc electrodes and one silver oxide electrode.  Scanning electron microscopy images showed that the morphology of the produced powders was flake type. Particle size reduction below 100 nanometer was performed using surfactant and control of reaction parameters. Results from high-rate discharge tests showed that the capacity and voltage of the optimized electrodes with nano powder were 42% and 0.11 V, respectively, higher than the capacity and voltage electrodes made with the conventional powder.

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