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High stable zinc tungstate electrode for electrochemical supercapacitor

机译:用于电化学超级电容的高稳定锌钨电极

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This paper aims to develop a way for synthesising Zinc Tungstate (ZnWO_4) by Microwave method. Which is simpler easier and better than hydrothermal synthesis. Formation of the crystal microstructures were verified with the aid of Powder X-Ray Diffraction (XRD), and further, morphologies were investigated upon using Field Emission Scanning Electron Microscope (FESEM). The implications in the energy storage devices were examined by preparing a pseudo capacitor. The electrochemical characteristics were analysed by using three-electrode system and its performance was evaluated with the assistance of Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). The result presented the specific capacitance as 79 Fg~(-1) for a scan rate of 1mVs~(-1). The ZnWO_4 as an active material retains 96.52% stability up to 1000 cycles. A significant increase in the impedance for lower frequencies can be observed for the material after 1000 cycles when compared to that of the first cycle.
机译:本文旨在通过微波法开发一种用于综合钨酸锌(ZnWO_4)的方法。 这更简单,比水热合成更容易。 借助粉末X射线衍射(XRD)验证晶体微观结构的形成,进一步地,使用现场发射扫描电子显微镜(FESEM)对形态进行了调查。 通过制备伪电容器检查能量存储装置中的影响。 通过使用三电极系统分析电化学特性,并在循环伏安法(CV)的辅助和电化学阻抗光谱(EIS)的辅助中评估其性能。 结果将特定电容呈现为79 fg〜(-1),扫描速率为1mVs〜(-1)。 作为活性材料的ZnWO_4保留96.52%稳定性,可达1000个循环。 与第一循环相比,在1000个循环后,可以观察到较低频率的阻抗的显着增加。

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