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Nanoporous CuS nano-hollow spheres as advanced material for high-performance supercapacitors

Heydari, H ; Sharif University of Technology | 2017

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  1. Type of Document: Article
  2. DOI: 10.1016/j.apsusc.2016.10.138
  3. Publisher: Elsevier B.V , 2017
  4. Abstract:
  5. Due to unique advantages, the development of high-performance supercapacitors has stimulated a great deal of scientific research over the past decade. The electrochemical performance of a supercapacitor is strongly affected by the surface and structural properties of its electrode materials. Herein, we report a facile synthesis of high-performance supercapacitor electrode material based on CuS nano-hollow spheres with nanoporous structures, large specific surface area (97 m2 g−1) and nanoscale shell thickness (<20 nm). This interesting electrode structure plays a key role in providing more active sites for electrochemical reactions, short ion and electron diffusion pathways and facilitated ion transport. The CuS nano-hollow spheres electrode exhibits excellent electrochemical performance including a maximum specific capacitance of 948 F g−1 at 1 A g−1, significant rate capability of 46% capacitance retention at a high current density of 50 A g−1, and outstanding long-term cycling stability at various current densities. This work not only demonstrates the promising potential of the CuS-NHS electrodes for application in high-performance supercapacitors, but also sheds a new light on the metal sulfides design philosophy. © 2016 Elsevier B.V
  6. Keywords:
  7. CuS ; Hollow spheres ; Nanoporous ; Supercapacitor ; Capacitance ; Copper ; Electrodes ; Spheres ; Electrochemical performance ; Electrochemical reactions ; High current densities ; Hollow sphere ; Large specific surface areas ; Nano-porous ; Super capacitor ; Supercapacitor electrodes ; Electrochemical electrodes
  8. Source: Applied Surface Science ; Volume 394 , 2017 , Pages 425-430 ; 01694332 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0169433216322620