A 3D self-supported coralline-like CuCo2 S4 @NiCo2 S4 core-shell nanostructure composite for high-performance solid-state asymmetrical supercapacitors

Nanotechnology
Li MaGuojia Fang

Abstract

Rational construction of three dimensional (3D) composite structure is an important method to flexible supercapacitor electrodes and has been extensively developed. In this work, a 3D self-supported CuCo2S4@NiCo2S4 core-shell nanostructure grown on Nickel (Ni) foam, constructed by a hydrothermal method, was used as a novel supercapacitor electrode material. The unique structure possesses a large, specific surface area, rapid diffusion of electrolyte ions by numerous channels and avoids the use of additives and adhesives. The high electrical conductivity of the CuCo2S4 nanoneedle arrays can speed up electronic transmission. At a current density of 1 A g-1, the electrode material exhibits a high specific capacity of 539.2 C g-1 and cycling stability with 100% capacity retention after 5000 cycles in 3 M KOH. Furthermore, when the obtained CuCo2S4@NiCo2S4 was used as the positive electrode and an activated carbon was used as the negative electrode, a solid-state asymmetric supercapacitor was assembled. More importantly, the obtained solid-state asymmetric supercapacitor demonstrated excellent electrochemical performance. When the power density was 400 W kg-1, it delivered a high density of 23.4 W h kg-1 with a high voltage window o...Continue Reading

References

Nov 12, 2013·Angewandte Chemie·Zhibin YangHuisheng Peng
Mar 5, 2016·Chemical Communications : Chem Comm·Seyyed Ebrahim MoosavifardMehdi Rahmanian
Sep 29, 2017·ACS Applied Materials & Interfaces·Tian ChenGuojia Fang
Mar 27, 2018·Osteoporosis International : a Journal Established As Result of Cooperation Between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA·X XiaoQ Wu

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Citations

Mar 6, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Tong XiaXiang Wu
Feb 6, 2020·ACS Omega·Jun-Ming XuJi-Peng Cheng

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