Electrochemical performance of ternary RGO/β-Ni(OH)2/CeO2 composite in addition with different metal oxides for supercapacitor application

被引:18
作者
Godlaveeti, Sreenivasa Kumar [1 ]
Maseed, Hussen [2 ]
Reddy, Somala Adinarayana [1 ]
Nagireddy, Ramamanohar Reddy [1 ]
机构
[1] Yogi Vemana Univ, Dept Mat Sci & Nanotechnol, Kadapa 516005, Andhra Pradesh, India
[2] Univ Hyderabad, Sch Engn Sci & Technol, Hyderabad 500046, India
关键词
hydrothermal; solid-state method; nanorods; quaternary; supercapacitor; REDUCED GRAPHENE OXIDE; POT HYDROTHERMAL SYNTHESIS; TIO2/GRAPHENE NANOCOMPOSITE; ELECTRODE MATERIAL; FACILE SYNTHESIS; ENERGY-STORAGE; CARBON; NANOCRYSTALS; NANORODS; HYBRIDS;
D O I
10.1088/2043-6254/ab8bde
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Herein, we demonstrate a facile ternary nanocomposite synthesis of the RGO/beta-Ni(OH)(2)/CeO2 hydrothermal route followed by a solid-state method at room temperature. Firstly, RGO, beta-Ni(OH)(2) and CeO2 were taken with different weight ratios in a mortar pestle and prepared by solid-state method to obtain ternary RGO/beta-Ni(OH)(2)/CeO2 nanocomposite. The as-prepared powder samples and fabricated electrodes for supercapacitors were systematically investigated. Further, a very low quantity of as-prepared bare TiO2 nanorods (NRs), SnO2 nanparticles (NPs) and MnO2 NRs was added to the above-obtained ternary composite to prepare quaternary nanocomposite. The as-prepared material crystalline structure, morphological and elemental analyses were examined by using different characterisation techniques such as x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive x-ray spectroscopy (EDX). The electrochemical properties of as-characterised ternary and quaternary composites were examined by using the cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS) techniques. The obtained results have shown that prepared ternary composite in addition with MnO2 NRs was endowed with superior specific capacitance (1250 F.g(-1)) at current density 0.5 A.g(-1) in 3 M KOH aqueous electrolyte solution as compared with other metal oxides of SnO2 NPs and TiO2 NRs. After 3000 cycles ternary nanocomposite in addition with MnO2 NRs retained 78.46%, showed better cyclic stability. Based on these results it can be concluded that the novel ternary/quaternary composite of RGO/beta-Ni(OH)(2)/CeO2 can serve as promising electrode material in next-generation supercapacitors.
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页数:13
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