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首页> 外文期刊>International Journal of Electrochemical Science >Synthesis of NiO/Activated Carbon Composites and Their Application as Electrode Materials for Capacitors
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Synthesis of NiO/Activated Carbon Composites and Their Application as Electrode Materials for Capacitors

机译：NiO /活性炭复合材料的合成及其在电容器电极中的应用

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Electrochemical capacitor (EC) based on NiO/activated carbon (AC) composite electrodes was investigated in this work to improve its electrochemical performance. NiO/AC composites were prepared as anode, while HyperCoal-based ACs were used as cathode for EC. The composites were characterized by means of X-ray diffraction and scanning electron microscopy. The porosity of HyperCoal-based ACs was characterized by N2 adsorption-desorption analyses. The electrochemical characterization of capacitor was examined using galvanostatic charge-discharge in 1 M and 8 M KOH electrolyte solution. The results show that NiO/AC composite electrodes exhibit a good -1 electrochemical performance with a maximum specific capacitance (Cg) of 214.48 F g at the charge- -1 discharge current density of 40 mA g in 1 M KOH electrolyte. Meanwhile, the Cg increases gradually with the increase of NiO content. In addition, the Cg of EC prepared in 8 M KOH aqueous is higher than that of EC prepared in 1 M KOH aqueous until the content of NiO reaches up to 55.6%.
机译：在这项工作中研究了基于NiO /活性炭（AC）复合电极的电化学电容器（EC），以改善其电化学性能。制备了NiO / AC复合材料作为阳极，而使用基于HyperCoal的ACs作为EC的阴极。通过X射线衍射和扫描电子显微镜对复合材料进行表征。通过N2吸附-脱附分析表征了HyperCoal基AC的孔隙率。使用恒电流充放电在1 M和8 M KOH电解质溶液中检查电容器的电化学特性。结果表明，NiO / AC复合电极在1 M KOH电解质中的充电-1放电电流密度为40 mA g时，具有良好的-1电化学性能，最大比电容（Cg）为214.48 F g。同时，随着NiO含量的增加，Cg逐渐增加。另外，在8M KOH水溶液中制备的EC的Cg高于在1 M KOH水溶液中制备的EC的Cg，直到NiO的含量达到55.6％。

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