@article{Xie2018, 
author = {Mingjiang Xie and Zhicheng Xu and Shuyi Duan and Zhengfang Tian and Yu Zhang and Kun Xiang and Ming Lin and Xuefeng Guo and Weiping Ding},
title = {Facile growth of homogeneous Ni(OH)2 coating on carbon nanosheets for high-performance asymmetric supercapacitor applications},
year = {2018},
journal = {Nano Research},
volume = {11},
number = {1},
pages = {216-224},
keywords = {in situ growth, ion-exchange reaction, hybrid Ni(OH)2, carbon nanosheet, supercapacitor},
url = {https://www.sciopen.com/article/10.1007/s12274-017-1621-4},
doi = {10.1007/s12274-017-1621-4},
abstract = {The growth of a Ni(OH)2 coating on conductive carbon substrates is an efficient way to address issues related to their poor conductivity in electrochemical capacitor applications. However, the direct growth of nickel hydroxide coatings on a carbon substrate is challenging, because the surfaces of these systems are not compatible and a preoxidation treatment of the conductive carbon substrate is usually required. Herein, we present a facile preoxidation-free approach to fabricate a uniform Ni(OH)2 coating on carbon nanosheets (CNs) by an ion-exchange reaction to achieve the in situ transformation of a MgO/C composite to a Ni(OH)2/C one. The obtained Ni(OH)2/CNs hybrids possess nanosheet morphology, a large surface area (278 m2/g), and homogeneous elemental distributions. When employed as supercapacitors in a three-electrode configuration, the Ni(OH)2/CNs hybrid achieves a large capacitance of 2, 218 F/g at a current density of 1.0 A/g. Moreover, asymmetric supercapacitors fabricated with the Ni(OH)2/CNs hybrid exhibit superior supercapacitive performances, with a large capacity of 198 F/g, and high energy density of 56.7 Wh/kg at a power density of 4.0 kW/kg. They show excellent cycling stability with 93% capacity retention after 10, 000 cycles, making the Ni(OH)2/CNs hybrid a promising candidate for practical applications in supercapacitor devices.}
}