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Hybrid supercapacitors constructed from double-shelled cobalt-zinc sulfide/copper oxide nanoarrays and ferrous sulfide/graphene oxide nanostructures

Shahi, M ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jcis.2020.10.055
  3. Publisher: Academic Press Inc , 2020
  4. Abstract:
  5. Evolution of renewable energies in the era of the modernized world has been strongly tied up to the incessant development of high-performance energy storage systems benefiting from both high energy and power densities. In the present work, binder-free positive electrodes are fabricated via a facile electrochemical deposition route in which copper oxide nanorods (CuO NRs) directly grown onto the copper foam (CF) are decorated with bimetallic cobalt-zinc sulfide nanoarrays (Co-Zn-S NAs). The fabricated Co-Zn-S@CuO-CFs represent promising specific capacity of 317.03 C.g−1 at 1.76 A.g−1, along with superior cyclic stability (113% retention after 4500 cycles). Negative electrodes were further prepared through a direct deposition of iron sulfide nanosheets (Fe-S NSs) onto the graphene oxide (GO), showing remarkable the specific capacitance of 543.9 F.g−1 at 0.79 A.g−1. Receiving benefits from remarkable energy and power densities (25.71 Wh.kg−1 and 8.73 kW.kg−1) alongside the reasonable life-stability, the fabricated asymmetric supercapacitor (ASC) devices are on merit for developing high-performance energy storage systems. © 2020 Elsevier Inc
  6. Keywords:
  7. Asymmetric supercapacitor ; Cobalt zinc sulfide ; Copper foam ; Graphene oxide ; Iron sulfide ; Copper oxides ; Data storage equipment ; Electrochemical deposition ; Electrochemical electrodes ; Energy storage ; Graphene ; II-VI semiconductors ; Nanorods ; Reduction ; Sulfide minerals ; Sulfur compounds ; Supercapacitor ; Zinc sulfide ; Asymmetric supercapacitor ; Energy storage systems ; Hybrid supercapacitors ; Negative electrode ; Oxide nanostructures ; Positive electrodes ; Specific capacitance ; Specific capacities ; Cobalt compounds
  8. Source: Journal of Colloid and Interface Science ; 2020
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0021979720313953