期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 856, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.157874
关键词
MnMoO4@MWCNT; Asymmetric supercapacitor; Specific capacitance; Energy and power densities
资金
- National Research Foundation of Korea (NRF) - Korean government (MSIP) [2017R1A2B4011998, 2018R1A6A1A03025708]
The MnMoO4@multi-walled carbon nanotube (MWCNT) composite was successfully prepared via a hydrothermal method and used as an electrode material for supercapacitors, exhibiting excellent electrochemical properties. A comparison was made between the composite and MnMoO4 electrode materials. An ASC device composed of the composite and activated carbon demonstrated high energy density and storage capabilities.
The MnMoO4@multi-walled carbon nanotube (MWCNT) composite is prepared successfully by a hydrothermal method. The composite is subjected as an electrode material for supercapacitors, showing excellent electrochemical feature with a high specific capacitance of 1017 F g(-1) at 1 A g(-1). The electrochemical behavior of the composite is compared with the MnMoO4 electrode material. Owing to high performance of composite, asymmetric supercapacitor (ASC) composed of MnMoO4@MWCNT and activated carbon is fabricated with an aqueous electrolyte. The device delivers a high energy density of 18.1 W h kg(-1) at the power density of 362.4 W kg(-1). With good energy storage properties of electrode material, it could store sufficient charge to power the twelve red color light-emitting diodes. Furthermore, a motor fan is rotated by ASC device. A digital watch is also powered by ASCs. The obtained results suggest that the prepared MnMoO4@MWCNT composite material is promising for energy storage devices. (C) 2020 Elsevier B.V. All rights reserved.
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