期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 799, 期 -, 页码 15-25出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.05.305
关键词
NiCo-LDH; Core-shell structure; Synergistic effect; Asymmetric 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 [201712150005, 201712150006, 201712150010]
- Scientific Research Foundation of Chongqing University of Posts and Telecommunications [A2018-21]
In this paper, a facile two-step method was adopted to in-situ develop a flexible electrode with NiCo-LDH nanowires@NiCo-LDH nanosheets core-shell structure on carbon fiber cloth (CFC). The electrochemical properties of the composite materials with different Ni/Co molar ratios nanosheets were systematically studied. It is found that the NiCo-LDH nanowires@Ni2Co1-LDH nanosheets (NiCo@Ni2Co1 ) composite material achieves a high areal capacitance of 9.67 F/cm(2) at 5 mA/cm(2) and a good cycling stability (75% capacitance retention after 2000 cycles). The excellent performance benefits from the distinct core-shell structure and the synergistic effect of NiCo-LDH nanosheets and NiCo-LDH nanowires. Moreover, a solidstate flexible asymmetric supercapacitor (ASC) assembled with NiCo@Ni2Co1/CFC as positive electrode and activated carbon on CFC as negative electrode can work stably at a voltage of 1.6 V. This ASC displays a high areal energy density of 298.6 uWh/cm(2) at a current density of 1 mA/cm(2) and with a corresponding areal power density of 0.80 mW/cm(2). (C) 2019 Elsevier B.V. All rights reserved.
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