期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 883, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.160874
关键词
Defective mesoporous carbon; MnO2; Nanocomposite; Supercapacitor
资金
- Academic Center for Education, Culture and Research (ACECR)
A novel nanocomposite based on DMC and MnO2 exhibited high specific capacitance, good rate performance, and cycling stability. Structural analyses confirmed the excellent performance of the nanocomposite material.
Herein, the supercapacitive characteristics of a novel nanocomposite based on defective mesoporous carbon (DMC) and MnO2 is presented. DMC was obtained via a facile and low-cost synthesis route and its interconnected pore network was served as host matrix for the growth of MnO2 nanoparticles to form the DMC/MnO2 nanocomposite. The deposition of MnO2 nanoparticles at the surface of DMC support was investigated using different structural analyses including FT-IR, Nitrogen adsorption/desorption, XRD, XPS, SEM and TEM. Compared to DMC and MnO(2 )electrodes, the DMC/MnO(2 )nanocomposite exhibited the highest specific capacitance reaching to 292 F g(-1) at current density of 0.5 A g(-1). Also, DMC/MnO2 possessed good rate performance (61% capacity retention over 0.5-10 A g(-1)) and cycling stability (21% capacity loss after 2000 charge discharges cycles). Furthermore, a two-electrode symmetric supercapacitor device delivered a high specific energy of 34 W h kg(-1) at specific power of 100 W kg(-1). (C) 2021 Elsevier B.V. All rights reserved.
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