Facile Growth of Caterpillar-like NiCo2 S4 Nanocrystal Arrays on Nickle Foam for High-Performance Supercapacitors

ACS Applied Materials & Interfaces
Xiaojuan ChenHongzhou Zhang

Abstract

Ternary cobalt nickel sulfide as a novel and efficient electrode material in supercapacitors has recently gained extensive interests. Herein, we first report a highly conductive caterpillar-like NiCo2S4, composed of NiCo2S4 nanosheet core and nanowire shell grown on Ni foam via a facile and cost-effective chemical liquid process. Growth mechanism of the NiCo2S4 nanosheets@nanowires (NSNWs) structure was also investigated in detail by analyzing time-dependent experimental as well as the amount of additive ammonium fluoride in solution. Furthermore, the electrochemical measurements were performed among three different morphologies of NiCo2S4 including nanosheets, nanosheets@nanoparticles, and NSNWs structure, which were obtained from different reaction stages. Because the NSNWs structure has relatively high electroactive surface area, conductivity, and effective electron transport pathways, the as-prepared NiCo2S4 NSNWs structure comparing with two other morphologies exhibits the maximum specific capacity of 1777 F/g at 1 A/g and the highest capacitance retention (83% after 3000 cycles) at a high scan rate of 10 A/g with a mass loading density of 4.0 mg/cm2. These results indicate that the NiCo2S4 NSNWs structure has great potent...Continue Reading

References

Jan 27, 2005·Chemical Reviews·Martin Winter, Ralph J Brodd
May 4, 2005·Nature Materials·Antonino Salvatore AricòWalter van Schalkwijk
Feb 8, 2008·Nature·M Armand, J-M Tarascon
Jul 23, 2011·Chemical Society Reviews·Guoping WangJiujun Zhang
Sep 25, 2014·Chemistry : a European Journal·Rahul R SalunkheYusuke Yamauchi
Aug 14, 2015·ACS Applied Materials & Interfaces·Xiaoming LiHaibo Zeng
Jan 27, 2016·ACS Applied Materials & Interfaces·Xiaojuan ChenRongming Wang

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Citations

Mar 7, 2019·Royal Society Open Science·Yunxia HuangYimin Cui
Jun 20, 2017·Chemistry, an Asian Journal·Yong-Ping Gao, Ke-Jing Huang

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