ScholarWorks@동국대학교

초록

Strategic design and synergistic interactions between the electrodes and electroactive materials profoundly influence the energy storage efficiency of supercapacitor devices. Herein, we present the interfacial engineering of CoMoS4-NiS2 with a well-defined construction of amorphous/crystalline heterophases deposited on carbon cloth using a hydrothermal technique. The optimal in-situ growth of CoMoS4- NiS2 @CFC boasts an impressive areal capacity of 1341 mC cm-2 and retains similar to 91 % capacity after 50 0 0 cycles, attributed to the synergy effect and improved conductivity of multi-metallic sulfide ions over the CFC substrate. Density functional theory (DFT) reveals the metallic nature of CoMoS4-NiS2 @CFC and favorable OH- ion adsorption energy of -4.35 eV, enhancing its charge storage capabilities. Furthermore, a hybrid supercapacitor (HSC) and Pouch HSC are assembled utilizing the CoMoS4-NiS2 @CFC as a positrode and marine waste jellyfish-derived AC as a negatrode with an aqueous electrolyte. The HSC and PHSC demonstrate superior specific energies of 51.99 and 58.4 W h kg-1, respectively, along with corresponding specific powers of 800 and 780 W kg-1, maintaining robust stability of similar to 90 % stability over 10 0 0 0 cycles. Additionally, the HSC and PHSC have successfully illuminated several light-emitting diodes (LEDs) demonstrating superior energy storage performance. This work advances the design of hetero-phase multi-metal sulfides, paving the way for high-performance supercapacitor devices. (c) 2025 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

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