NDLI: Serpent-cactus-like Co-doped Ni(OH)2/Ni3S2 hierarchical structure composed of ultrathin nanosheets for use in efficient asymmetric supercapacitors

Content Provider	Royal Society of Chemistry (RSC)
Author	Zan, Ping Yang, Xijia Sun, Haiming Shi, Wenhui Zhang, Hang Xu, Tianhao Gen, Shuai Zhao, Lijun Ye, Lin Han, Bing
Copyright Year	2017
Abstract	Herein, a rational Co-doped Ni(OH)2/Ni3S2 hybrid was designed and grown in situ on Ni foam (NiCo-10) via a one-pot hydrothermal reaction with two-step temperature control, avoiding the utilization of complicated production processes or high-end technology. Interestingly, the as-prepared NiCo-10 presents a distinct one-dimensional serpent-cactus-like structure consisting of ultrathin internal nanosheets. As a supercapacitor electrode, the hinder-free NiCo-10 exhibits an ultrahigh specific capacitance value of 3023.4 F g−1 at 1 A g−1 and excellent rate performance (capacitance retention of 82.9% up to 20 A g−1), owing to the distinct and available ultrathin serpent-cactus-like structure. Meanwhile, an asymmetric supercapacitor is developed, wherein NiCo-10 is utilized as a positive electrode and activated carbon as a negative electrode. The asymmetric device could exhibit a high specific capacitance value of 136.2 F g−1 (at 1 A g−1), high energy densities of 51.5 W h kg−1 (at 0.825 kW kg−1) and 23.0 W h kg−1 (even at 8.25 kW kg−1), and appropriate cycling stability. The efficient electrochemical performance of NiCo-10 makes it a promising electrode material for the energy storage field.
Starting Page	1603
Ending Page	1613
Page Count	11
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	5
Issue Number	4
Journal	Journal of Materials Chemistry A
DOI	10.1039/c6ta09547j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Hydrothermal circulation Electrode Capacitance Activated carbon Electrochemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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