Facile fabrication and perfect cycle stability of 3D NiO@CoMoO4 nanocomposite on Ni foam for supercapacitors

Facile fabrication and perfect cycle stability of 3D NiO@CoMoO4 nanocomposite on Ni foam for supercapacitors
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用于超级电容器的泡沫镍上 3D NiO@CoMoO4 纳米复合材料的简便制造和完美循环稳定性

DOI:
10.1039/c4ra00642a
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发表时间:
2014-04
期刊:
影响因子:
3.9
通讯作者:
Kang, Long
Kang, Long
中科院分区:
化学3区
文献类型:
--
作者:
Zhang, Wei-Bin;Liu, Mao-Cheng;Luo, Yong-Chun;Kang, Long

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通过在泡沫镍上生长三维(3D)NiO@CoMoO4纳米复合材料,设计了一种用于高性能超级电容器的先进无粘合剂电极。这种独特的纳米复合材料分别结合了CoMoO 4的完美循环稳定性和倍率性能以及NiO的高比电容的优点。此外,NiO@CoMoO4的纳米结构可以作为“离子库”来存储电解质的离子,并赋予其更高的比表面积和更多的活性位点。结果,与单一氧化物电极相比,该电极表现出显著的比电容(在0.5A g-1的电流密度下为848 F g-1)、完美的循环稳定性(3000次循环后100%的循环效率)和优异的电化学性能。同时也为合理设计高性能超级电容器的先进集成纳米复合电极提供了可行性。
An advanced binder-free electrode for high-performance supercapacitors has been designed by growing a three-dimensional (3D) NiO@CoMoO4 nanocomposite on Ni foam. Such a unique nanocomposite combined separately the advantages of the perfect cycling stability and rate capability of CoMoO4 and the high specific capacitance of NiO. Furthermore, the nanostructure of NiO@CoMoO4 could serve as an “ion reservoir” to store ions of the electrolyte, and give it a higher specific surface area and more active sites. As a result, this electrode exhibited remarkable specific capacitances (848 F g−1 at a current density of 0.5 A g−1), perfect cycle stability (100% of cycle efficiency after 3000 cycles) and excellent electrochemical performance compared to single oxide electrodes. And this work also demonstrates the feasibility of rational design of advanced integrated nanocomposite electrodes for high-performance supercapacitors.
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