Superior Electrochemical Performance and Cyclic Stability of WS 2 @CoMgS//AC Composite on the Nickel-Foam for Asymmetric Supercapacitor Devices

Muhammad Imran, Amir Muhammad Afzal (), Muhammad Waqas Iqbal, Sohail Mumtaz and Areej S. Alqarni
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Muhammad Imran: Department of Physics, Riphah International University, Campus Lahore, Lahore 54000, Pakistan
Amir Muhammad Afzal: Department of Physics, Riphah International University, Campus Lahore, Lahore 54000, Pakistan
Muhammad Waqas Iqbal: Department of Physics, Riphah International University, Campus Lahore, Lahore 54000, Pakistan
Sohail Mumtaz: Department of Electrical and Biological Physics, Kwangwoon University, Seoul 01897, Republic of Korea
Areej S. Alqarni: Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia

Energies, 2024, vol. 17, issue 14, 1-15

Abstract: Two-dimensional (2D) sulfide-based transition metal dichalcogenides (TMDs) have shown their crucial importance in energy storage devices. In this study, the tungsten disulfide (WS 2 ) nanosheets were combined with hydrothermally synthesized cobalt magnesium sulfide (CoMgS) nanocomposite for use as efficient electrodes in supercapattery energy storage devices. The characteristics of the WS 2 @CoMgS nanocomposite were better than those of the WS 2 and CoMgS electrodes. XRD, SEM, and BET analyses were performed on the nanocomposite to examine its structure, morphology, and surface area in depth. In three-electrode assemblies, the composite (WS 2 @CoMgS) electrode showed a high specific capacity of 874.39 C g −1 or 1457.31 F g −1 at 1.5 A g −1 . The supercapattery device (WS 2 @CoMgS//AC) electrode demonstrated a specific capacity of 325 C g −1 with an exceptional rate capability retention of 91% and columbic efficiency of 92% over 7000 cycles, according to electrochemical studies. Additionally, the high energy storage capacity of the WS 2 @CoMgS composite electrode was proved by structural and morphological investigations.

Keywords: 2D-TMDs; tungsten disulfide; cobalt magnesium sulfide; energy storage; redox active cites; cyclic stability (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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