期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 802, 期 -, 页码 259-268出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.06.173
关键词
MXene; MnO2; Electrical properties; Flexible supercapacitor
资金
- Fundamental Research Funds for the Central Universities [2019CDXYWL0029, 2018CDJDWL0011, 106112017CDJQJ328839, 106112016CDJZR288805]
- Opening Project of Material Corrosion and Protection Key Laboratory of Sichuan Province [2017CL14]
- Key Scientific and Technological R&D Projects of Sichuan Province [2017GZ0098]
- NSFC [51877023, 11544010, 11374359, 11304405, 1155305]
- Natural Science Foundation of Chongqing [cstc2018jcyjAX0450, cstc2015jcyjA50035, cstc2015jcyjA1660]
- Science and Technology Research Program of Chongqing Municipal Education Commission [KJKJQN201800102, KJQN201800619]
- Sharing Fund of Large-scale Equipment of Chongqing University [201903150094, 201712150005, 201712150006, 201712150010]
- Scientific Research Foundation of Chongqing University of Posts and Telecommunications [A2018-21]
In this paper, a highly deformable and conductive freestanding electrode based on the composite of MnO2 and MXene on carbon cloth is designed. Benefiting from the synergistic coupling of MXene and MnO2, the novel electrode has enhanced electrochemical performance (511.2 F/g) compared with MnO2 nanorods/carbon cloth (302.3 F/g), and when the current increases by 5 times (1 A/g to 5 A/g), 60.3% capacitance was retained, suggesting excellent rate capability. The capacitance of the composite electrode was reduced by only 17% after 10,000 cycles, showing excellent cycle stability. In addition, an asymmetric flexible supercapacitor based on MnO2 nanorods/MXene/carbon cloth exhibited a high energy density of 29.58 Wh/kg at a power density of 749.92 W/kg. The assembled supercapacitor presented excellent mechanical properties, even if the capacitor is bent 180 degrees, the performance is almost unchanged. The above results demonstrate that MnO2/MXene/CC electrode has a potential for high-performance flexible supercapacitors. (C) 2019 Elsevier B.V. All rights reserved.
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