Preparation of partially-cladding NiCo-LDH/Mn3O4 composite by electrodeposition route and its excellent supercapacitor performance
Preparation of partially-cladding NiCo-LDH/Mn3O4 composite by electrodeposition route and its excellent supercapacitor performance
复制标题
电沉积法制备部分包覆NiCo-LDH/Mn3O4复合材料及其优异的超级电容器性能
DOI:
10.1016/j.jallcom.2019.05.023
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发表时间:
2019-08
影响因子:
6.2
通讯作者:
Cao Xiaoqiang
中科院分区:
文献类型:
--
作者:
Zhao Nan;Fan Huiqing;Zhang Mingchang;Wang Chao;Ren Xiaohu;Peng Haijun;Li Hua;Jiang Xinbiao;Cao Xiaoqiang
A NiCo-LDH/Mn3O4composite is synthesized on nickel foam substrate though a two-step electrodepositon process. The growth of Mn3O4nanoneedles 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/Mn3O4demonstrates a high specific capacity of 1.86 C cm−2(1034.33 C g−1) at the current density of 1 mA cm−2, a superior rate capability of maintaining 76.88% at 20 mA cm−2and 17.98% capacity loss after 5000 cycles. In addition, an all-solid-state hybrid supercapacitor device (HSC) is fabricated with NiCo-LDH/Mn3O4as the cathode and commercially-used active carbon as the anode, which delivers a superior energy density of 57.03 Wh kg−1at the power density of 765.8 W kg−1and maintains 20.98 Wh kg−1even when the power density increases to 9681.6 W kg−1. Therefore, the satisfactory electrochemical property enables NiCo-LDH/Mn3O4to become a prospective electrode material in energy storage field.
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