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首页> 外文期刊>Journal of industrial and engineering chemistry >Synthesis of microcrystalline ZnO as an anodic material via a solvothermal method, and its electrochemical performance in Ni/Zn redox battery
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Synthesis of microcrystalline ZnO as an anodic material via a solvothermal method, and its electrochemical performance in Ni/Zn redox battery

机译：通过溶剂质方法合成微晶ZnO作为阳极材料，及其在Ni / Zn氧化还原电池中的电化学性能

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摘要

Highly crystalline ZnO microparticles were prepared by a conventional solvothermal route by adding ethylenediamine (EDA). The product was analyzed by X-ray diffraction (XRD) and transmission electron microscopy (TEM) to investigate its crystallinity and morphology. The ZnO microparticles showed high purity and perfect crystallinity, and hexagonal rod shapes (width 5.0 mu m x length 15.0 mu m) were seen in the powdered particles. ZnO microparticles (0.5 M) were dissolved in 4.0 M LiOH, NaOH, and KOH alkaline electrolytes in order to evaluate their electrochemical properties. The cyclic voltammetry (CV) curves revealed that the micro-sized hexagonal ZnO rods dissolved in KOH electrolyte exhibited superior electrochemical activity to those dissolved in LiOH and NaOH electrolytes. The micro-sized hexagonal ZnO rods in KOH electrolyte showed a significantly improved cycle stability until the 100th cycle, and reached a discharge capacity of 143.6 mA h g(-1), an efficiency of 86%, and a discharge voltage of 1.72 V at a current density of 30 mA cm(-2). Moreover, during repeated charging-discharging cycles, the growth of zinc dendrites was suppressed, resulting in improved cycle stability in Ni/Zn redox batteries. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译：通过加入乙二胺（EDA），通过常规溶剂热途径制备高结晶ZnO微粒。通过X射线衍射（XRD）和透射电子显微镜（TEM）分析产物，以研究其结晶度和形态学。 ZnO微粒显示出高纯度和完美的结晶度，并且在粉末颗粒中看到六边形棒状（宽5.0μm×长度为15.0μm）。将ZnO微粒（0.5M）溶解在4.0M LiOH，NaOH和Koh碱性电解质中，以评估其电化学性质。循环伏安法（CV）曲线显示，溶解在KOH电解质中的微尺寸六方ZnO棒表现出优异的电化学活性与溶解在LiOH和NaOH电解质中的那些。 KOH电解质中的微尺寸六方ZnO棒显示出直至第100次循环直至的循环稳定性显着提高，并且放电容量为143.6 mA Hg（-1），效率为86％，放电电压为1.72V电流密度为30 mA cm（-2）。此外，在反复充电排出循环期间，抑制了锌枝晶的生长，导致Ni / Zn氧化还原电池中的循环稳定性改善。 （c）2016年韩国工程和工程化学学会。 elsevier b.v出版。保留所有权利。

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