Ni-Doped cerium oxide on rGO: A hydrothermal approach for high-performance supercapacitors

Sustainable Chemistry for the Environment Pub Date : 2024-06-01 DOI:10.1016/j.scenv.2024.100117

Nishath Afza , M.S. Shivakumar , G. Krishnamurthy , M. Mylarappa , C.R. Ravikumar

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Abstract

This work describes the hydrothermal method for synthesizing a novel nanocomposite: Nickel -doped Cerium oxide on reduced graphene oxide (Ni-CeO₂/rGO). The resulting material exhibits exceptional electrocatalytic behavior, showing promise for supercapacitor applications. The Phase morphology, elemental analysis, surface area and oxidation state were confirmed by powder X-ray diffraction studies (PXRD), Raman spectrum, High Resolution Transmission Electron Microscopy (HRTEM), Field Emission Scanning Electron Microscopy (FESEM) and Energy Dispersive X-ray (EDX), Brunauer-Emmett Teller (BET) and XPS respectively. Electrochemical analysis involving cyclic voltammetry (CV), Galvanostatic charge/ discharge, and Electrochemical impedance spectroscopy (EIS). The specific capacitance is 262.1Fg^-1, 504Fg^-1, and 728Fg^-1 for CeO₂, CeO₂/rGO, Ni-CeO₂/rGO it depicts its suitability for energy storage. This study establishes the Ni-CeO₂/rGO nanocomposite as a highly effective material for advanced energy storage applications.

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rGO 上的掺镍氧化铈：一种用于高性能超级电容器的水热法

本作品介绍了合成新型纳米复合材料的水热法：还原氧化石墨烯（Ni-CeO2/rGO）上掺杂氧化铈的镍纳米复合材料。所得材料具有优异的电催化性能，有望应用于超级电容器。粉末 X 射线衍射研究 (PXRD)、拉曼光谱、高分辨率透射电子显微镜 (HRTEM)、场发射扫描电子显微镜 (FESEM)、能量色散 X 射线 (EDX)、Brunauer-Emmett Teller (BET) 和 XPS 分别证实了材料的相形态、元素分析、表面积和氧化态。电化学分析包括循环伏安法 (CV)、Galvanostatic 充电/放电法和电化学阻抗光谱法 (EIS)。CeO2、CeO2/rGO、Ni-CeO2/rGO 的比电容分别为 262.1Fg-1、504Fg-1 和 728Fg-1，这表明它们适合用于储能。这项研究确定了 Ni-CeO2/rGO 纳米复合材料是一种先进储能应用的高效材料。

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Sustainable Chemistry for the Environment

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0.40

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