Zinc electrodes prepared by electrodepositing zinc on a copper plate in ZnSO4 electrolyte were studied to determine the most suitable condition of zinc anode preparation for high performance Zn-MnO2 battery. Deposition of zinc on substrate material was confirmed using X-ray diffraction (XRD) measurement. Morphological characterization of zinc anode was performed by scanning electron microscopy (SEM). It was observed that concentration of electrolyte and electrical current density influenced the morphology of zinc electrode. At 1 M ZnSO4 and current density values of 0.06–0.1 A/cm2, it was found that the morphological structure of zinc electrode was orderly arranged in a layer-by-layer structure. This indicated that the current density played an important role on deposition morphology and even on the crystal structure. Performance of electrodes was tested by a battery analyzer for 100 cycles. The results of the tests showed that the electrode with the layer-by-layer morphology yielded a high efficiency of up to 99.97% which was higher and more stable than those of the electrodes with disordered and scattered morphology. The layer-by-layer morphology is therefore a key factor for improving the performance of Zn-MnO2 cell.
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机译:为了确定高性能Zn-MnO2电池锌阳极制备的最合适条件,研究了通过在铜板上的ZnSO4电解质中电沉积锌制备的锌电极。使用X射线衍射(XRD)测量确认锌在基板材料上的沉积。锌阳极的形态表征通过扫描电子显微镜(SEM)进行。观察到电解质的浓度和电流密度影响锌电极的形态。发现在1 M ZnSO4和0.06-0.1 A / cm 2 sup>的电流密度值下,锌电极的形态结构是有序排列的一层又一层的结构。这表明电流密度对沉积形态甚至晶体结构起着重要作用。电极的性能通过电池分析仪测试了100个循环。测试结果表明,具有逐层形貌的电极产生的效率高达99.97%,比具有无序和分散形貌的电极更高且更稳定。因此,逐层形态是改善Zn-MnO2电池性能的关键因素。
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