Mesoporous Ni-P@NiCo2O4 composite materials for high performance aqueous asymmetric supercapacitors

Mesoporous Ni-P@NiCo2O4 composite materials for high performance aqueous asymmetric supercapacitors
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用于高性能水系不对称超级电容器的介孔Ni-P@NiCo2O4复合材料

DOI:
10.1016/j.electacta.2016.11.089
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发表时间:
2016-12-20
影响因子:
6.6
通讯作者:
Liu, Enhui
Liu, Enhui
中科院分区:
材料科学2区
文献类型:
--
作者:
Li, Xudong;Ding, Rui;Liu, Enhui

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采用溶剂热合成Ni-P和化学沉积NiCo 2 O 4的方法制备了介孔Ni-P@ NiCo 2 O 4复合材料。由于Ni-P和NiCo 2 O 4之间的协同效应,Ni-P@ NiCo 2 O 4复合材料表现出更高的性能(1240 F g(-1)at 1 A g(-1),668 F g(-1)at 16 A g(-1))与裸Ni-P材料相比(在1A g(-1)下为717 F g(-1),在16 A g(-1)下为106 F g(-1))和NiCo 2 O 4材料(在1A g(-1)下为741 F g(-1),在16 A g(-1)下为457 F g(-1))。此外,AC//Ni-P@ NiCo 2 O 4非对称电容器表现出上级能量/功率密度(13.3 Wh kg(-1)/5.7 kW kg(-1))和循环性能(在4 A g(-1)下10,000次循环后保持率为78.3%)(7.4Wh kg(-1)/5.7kW kg(-1),在4A g(-1)下10,000次循环后63.4%的保持率)和AC//NiCo 2 O 4不对称电容器(10.4Wh kg(-1)/5.6kW kg(-1),在4A g(-1)下10,000次循环后32.4%的保持率)。介孔Ni-P@ NiCo 2 O 4复合材料的优异性能使其成为超级电容器的理想电极材料。(C)2016爱思唯尔有限公司版权所有。
Mesoporous Ni-P@NiCo2O4 composite materials have been fabricated via a facile strategy including solvothermal synthesis of Ni-P and subsequent chemical deposition of NiCo2O4. Due to the synergistic effect between Ni-P and NiCo2O4, the Ni-P@ NiCo2O4 composite materials exhibit an enhanced performance (1240 F g(-1) at 1 A g(-1), 668 F g(-1) at 16 A g(-1)) compared with the bare Ni-P materials (717 F g(-1) at 1 A g(-1), 106 F g(-1) at 16 A g(-1)) and NiCo2O4 materials (741 F g(-1) at 1 A g(-1), 457 F g(-1) at 16 A g(-1)). Furthermore, the AC//Ni-P@ NiCo2O4 asymmetric capacitor exhibits superior energy/power densities (13.3 Wh kg(-1)/5.7 kW kg(-1)) and cycling behavior (78.3% retention after 10,000 cycles at 4 A g(-1)) than the AC//Ni-P asymmetric capacitor (7.4 Wh kg(-1)/5.7 kW kg(-1), 63.4% retention after 10,000 cycles at 4 A g(-1)) and AC//NiCo2O4 asymmetric capacitor (10.4 Wh kg(-1)/5.6 kW kg(-1), 32.4% retention after 10,000 cycles at 4 A g(-1)). The high performance makes the mesoporous Ni-P@ NiCo2O4 composite materials promising electrode materials for supercapacitors. (C) 2016 Elsevier Ltd. All rights reserved.