期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 796, 期 -, 页码 111-119出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.05.023
关键词
NiCo-LDH; NiCo-LDH/Mn3O4; Electrodeposition; Supercapacitors
资金
- National Natural Science Foundation of China [51672220]
- National Defense Science Foundation [32102060303]
- Xi'an Science and Technology Foundation [2017086CGRC049-XBGY005, 2017040CG-CG024]
- Shaanxi Provincial Key RD Program [2017KW-018]
- NPU Gaofeng Project of China [17GH020824]
A NiCo-LDH/Mn3O4 composite is synthesized on nickel foam substrate though a two-step electro-depositon process. The growth of Mn3O4 nanoneedles on NiCo-LDH nanosheets can greatly reduce the transport pathway of electrons and ions. Meanwhile, abundant active sites for redox reactions are generated and the structural endurance together with chemical stability of material is improved, thus strongly enhancing the electrochemical characteristics. When measured in a typical three-electrode cell, NiCo-LDH/Mn3O4 demonstrates a high specific capacity of 1.86 C cm(-2) (1034.33 Cg(-1)) at the current density of 1 mA cm(-2), a superior rate capability of maintaining 76.88% at 20 mA cm(-2) and 17.98% capacity loss after 5000 cycles. In addition, an all-solid-state hybrid supercapacitor device (HSC) is fabricated with NiCo-LDH/Mn3O4 as the cathode and commercially-used active carbon as the anode, which delivers a superior energy density of 57.03 Wh kg(-1) at the power density of 765.8 W kg(-1) and maintains 20.98 Wh kg(-1) even when the power density increases to 9681.6 W kg(-1). Therefore, the satisfactory electrochemical property enables NiCo-LDH/Mn3O4 to become a prospective electrode material in energy storage field. (C) 2019 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据