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Influence of Electrolytic Conditions on the Preparation of NiOOH by Catalytic Electrolysis Method

机译：电解条件对催化电解法制备NiOOH的影响

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摘要

In this paper, we propose a new method for the preparation of spherical nickle oxyhydroxide (NiOOH) by a clean catalytic electrolysis process of spherical Ni(OH)2 in alkaline solution. The influence of various parameters, such as kinds of catalysts, reaction temperature and electrolysis duration on electrolysis is studied and the catalytic electrolysis mechanism is discussed. The prepared NiOOH sample is characterized by X-ray diffraction, scanning electron microscope observation and electrochemical measurements. The experimental results show that the spherical β-NiOOH powder with high capacity is obtained by electrolysis process under the conditions of a temperature of 30-35 o -1 C with addition of KMnO4 for 4 h in 6-9 mol L NaOH solution. The obtained NiOOH electrodes have superior electrochemical performance than commercial MnO2 electrodes under different current densities. The NiOOH electrode offers 273.6 mAh g-1 specific capacity at 60 mA g-1, which is about 20% higher than that of commercial MnO2 electrode.
机译：本文提出了一种在碱性溶液中通过清洁催化电解电解球形Ni（OH）2的方法制备球形镍羟基氧化物（NiOOH）的新方法。研究了催化剂种类，反应温度，电解时间等参数对电解的影响，探讨了催化电解机理。制备的NiOOH样品通过X射线衍射，扫描电子显微镜观察和电化学测量来表征。实验结果表明，在温度为30-35 o -1 C的条件下，通过在6-9 mol L的NaOH溶液中加入KMnO4 4 h的条件下，通过电解工艺可获得高容量的球形β-NiOOH粉末。在不同的电流密度下，所获得的NiOOH电极具有比市售MnO2电极优异的电化学性能。 NiOOH电极在60 mA g-1时可提供273.6 mAh g-1的比容量，比市售MnO2电极高约20％。

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