Microwave-assisted synthesis of CuO/MnO 2 nanocomposites for supercapacitor application

Micro & nano letters

article

Pengjiao Zhang¹  Wei Li¹ 

[1] Department of Polymer Science and Engineering, Taiyuan University of Technology

关键词: electrolytes;    microwave ovens;    copper compounds;    X-ray photoelectron spectra;    scanning electron microscopy;    capacitance;    X-ray diffraction;    transmission electron microscopy;    nanocomposites;    electrochemical electrodes;    supercapacitors;    current density;    manganese compounds;    nanofabrication;    microwave materials processing;    semiconductor materials;    semiconductor growth;    activated carbon;    microwave-assisted synthesis;    CuO-MnO2 nanocomposites;    supercapacitor;    copper oxide-manganese dioxide;    microwave oven;    electrochemical supercapacitor;    scanning electron microscopy;    transmission electron microscopy;    X-ray photoelectron spectroscopy;    X-ray diffraction;    specific capacitance;    current density;    KOH electrolyte;    negative electrode;    activated carbon;    energy density;    power density;    cycling stability;    CuO-MnO2;   

DOI  :  10.1049/mnl.2020.0400

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Copper oxide/manganese dioxide (CuO/MnO 2 ) nanocomposites were prepared by a facile microwave-assisted synthesis method in an ordinary household microwave oven and used for electrochemical supercapacitor. The nanocomposites were characterised by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. Electrochemical results demonstrate that CuO/MnO 2 nanocomposites have better capacitance performance than pure CuO material. The CuO/MnO 2 nanocomposites have a high specific capacitance of 499.0 F/g at a current density of 0.5 A/g in 6 M KOH electrolyte. In addition, an asymmetric supercapacitor with activated carbon as a negative electrode and CuO/MnO 2 nanocomposite as a positive electrode was also successfully prepared. This asymmetric device exhibits a high energy density of 32.07 Wh/kg at a power density of 375.02 W/kg and fairly good cycling stability.

【 授权许可】

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