Abstract
Carbon nanotubes (CNTs), which are classified as one-dimensional (1D) materials have attracted considerable interest in the scientific community due to their extraordinary electrical conductivity, enormous surface area, and chemical stability. Supercapattery, a device that combines the advantages of supercapacitors and batteries, has attained substantial interest due to its impressive power and energy densities. We have synthesized the binary FeCuS and FeCuS@CNTs nanocomposite through hydrothermal technique. Due to the synergistic effect, the efficiency of the electrode is improved with CNTs doping. The composite electrode FeCuS@CNTs showed an extraordinary specific capacity of 1217 Cg−1, exceeding the individual capacity values of iron sulfide (807 Cg−1) and copper sulfide (532 Cg−1). FeCuS@CNTs nanocomposite is used as the anode and activated carbon (AC) is used as the cathode in the fabrication of a supercapattery device. We achieved an extraordinary specific capacity of 342 Cg−1, surpassing previously reported values. The asymmetric device showed an extraordinary performance, with a power density (Pd) of 2352 W/Kg and an energy density (Ed) of 37 Wh/Kg. To check the cyclic stability, we evaluated the hybrid device for up to 1000 cycles, and it exhibited impressive capacity retention (CR) of 84% and Coulombic efficiency (CE) of 93%. Our results represent that FeCuS, with a 50:50 weight ratio and CNT doping, may be a better electrode material for asymmetric supercapacitor applications.
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Acknowledgements
The authors are grateful to the Researchers Supporting Project number (RSP2023R407),
King Saud University, Riyadh, Saudi Arabia, for the financial support.
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MAY, HH, NM and AMA worked on experiment, data collection, analysis, and interpretation of results. MAY, HH, NM, AMA, MWI, AAG, SM, SAM, FA, MZY, AZ, and ZA performed the calculation and write the manuscript and helped during the calculation process and reviewed the manuscript.
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Yasir, M.A., Hassan, H., Muzaffar, N. et al. Effect of Fe doping on structural, morphological and electrochemical characteristics of CuS@CNTs composite electrode material to explore the Redox mechanism in supercapattery device. J Mater Sci: Mater Electron 34, 2266 (2023). https://doi.org/10.1007/s10854-023-11695-x
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DOI: https://doi.org/10.1007/s10854-023-11695-x