Hierarchical NiCo-LDH@NiOOH core-shell heterostructure on carbon fiber cloth as battery-like electrode for supercapacitor
Hierarchical NiCo-LDH@NiOOH core-shell heterostructure on carbon fiber cloth as battery-like electrode for supercapacitor
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DOI：
10.1016/j.jpowsour.2017.12.046
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发表时间：
2018-02-28
影响因子：
9.2
通讯作者：
Feng, Jicai
中科院分区：
文献类型：
--
作者：
Liang, Haoyan;Lin, Jinghuang;Feng, Jicai
构建合理的结构和采用独特的元器件是促进高性能超级电容器发展的两个重要关键。本文采用简单的两步法在碳纤维布上原位制备了以NiCo-LDH纳米线为核、NiOOH纳米片为壳的异质结构。所得NiCo-LDH@NiOOH电极在1A g（-1）下表现出约2622 F g（-1）的高比电容和良好的循环稳定性（10000次循环后仍有88.5%）。这种增强的电化学性能得益于独特的核-壳结构，并利用协同效应提供更多的电化学活性点和通道，以加速电子和离子的传输。此外，优化后的NiCo-LDH@NiOOH//AC器件的非对称超级电容器的能量密度高达51.7 Wh kg（-1），功率密度为599 W kg（-1），循环性能良好。
Constructing rational structure and utilizing distinctive components are two important keys to promote the development of high performance supercapacitor. Herein, we adopt a facile two-step method to develop an in situ heterostructure with NiCo-LDH nanowire as core and NiOOH nanosheets as shell on carbon fiber cloth. The resultant NiCo-LDH@NiOOH electrode exhibites a high specific capacitance of about 2622 F g(-1) at 1 A g(-1) and good cycling stability (88.5% remain after 10000 cycles). This reinforced electrochemical performance is benefit from the distinct core-shell structure, and takes advantage of the synergetic effect to supply more electrochemical active spots and pathways to accelerate electron and ion transport. Furthermore, the fabricated asymmetric supercapacitor of optimized NiCo-LDH@NiOOH//AC device displays a high energy density of 51.7 Wh kg(-1) while the power density is 599 W kg(-1) and presents a satisfying cycling performance.