Microwave‐assisted synthesis of CuO/MnO2 nanocomposites for supercapacitor application. (1st November 2020)

• Record Type: Journal Article
• Authors: Zhang, Pengjiao; Li, Wei
• Is Part Of: Micro & nano letters. Volume 15:Number 13(2020)
• Page Start: 938
• Page End: 942
• Publication Date: 2020-11-01
• Subjects: 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; Nanotechnology -- Periodicals; Nanostructures -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1049/mnl.2020.0400
• Languages: English
• ISSNs: 1750-0443

Abstract

Abstract : Copper oxide/manganese dioxide (CuO/MnO2 ) 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/MnO2 nanocomposites have better capacitance performance than pure CuO material. The CuO/MnO2 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/MnO2 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.