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Facile synthesis of nanoporous CuS nanospheres for high-performance supercapacitor electrodes

Heydari, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jechem.2017.03.007
  3. Abstract:
  4. In recent years, development of high-performance supercapacitor electrode materials has stimulated a great deal of scientific research. The electrochemical performance of a supercapacitor strongly depends on its material structures. Herein, we report a simple strategy for high-performance supercapacitors by building pseudocapacitive CuS nanospheres with nanoporous structures, nanosized walls (<10 nm) and relatively large specific surface area of 65 m2/g. This electrode demonstrates excellent electrochemical performance including a maximum specific capacitance of 814 F/g at 1 A/g, significant rate capability of 42% capacitance retention at an ultrafast rate of 50 A/g, and outstanding long-term cycling stability at various current densities. The remarkable electrochemical performance of as-prepared nanoporous CuS nanospheres electrode has been attributed to its unique structures that plays a key role in providing short ion and electron diffusion pathways, facilitated ion transport and more active sites for electrochemical reactions. This work sheds a new light on the metal sulfides design philosophy, and demonstrates that nanoporous CuS nanospheres electrode is a promising candidate for application in high-performance supercapacitors. © 2017 Science Press
  5. Keywords:
  6. CuS ; Capacitance ; Copper ; Electrochemical electrodes ; Electrodes ; Nanospheres ; Capacitance retention ; Electrochemical performance ; Electrochemical reactions ; Large specific surface areas ; Nano-porous ; Nanoporous structures ; Scientific researches ; Supercapacitor electrodes ; Supercapacitor
  7. Source: Journal of Energy Chemistry ; Volume 26, Issue 4 , 2017 , Pages 762-767 ; 20954956 (ISSN)
  8. URL: https://www.sciencedirect.com/science/article/pii/S2095495616302662