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- W4386898874 abstract "To improve the electrochemical performance of supercapacitors, pseudocapacitive electrode materials must be synthesized with high surface activity, high electrical conductivity, and ultralong cycle life, which presents a significant challenge. In this study, we reported on the synthesis of sulfur-vacancy-enriched sheet-like Ni3S2@ZnS composites based on 3D network porous nickel foam (NF) using a two-step electrodeposition protocol. The Ni3S2@ZnS/NF exhibited a specific capacitance of 1141.9 C g-1 (241.0 mC cm-2) at a current density of 19 A g-1 (5 mA cm-2). The Ni3S2@ZnS/NF positive electrode was used to fabricate an all-solid asymmetric supercapacitor, which demonstrated an ultrahigh energy density of 12.0 μWh cm-2 at a power density of 7.2 mW cm-2, as well as an ultrahigh capacitance retention rate of 86.7% after 50000 cycles. Experimental and theoretical results indicated that the introduction of sulfur vacancies could improve the surface activity of the electrode, as well as its hydroxide diffusion and adsorption ability by adjusting the surrounding local electron concentration of cations around them. This accelerated the interfacial redox reaction and resulted in remarkable electrochemical performance for the Ni3S2@ZnS/NF electrode. This research provides a pathway for the controlled synthesis of 2D nanosheets with vacancy-rich structures and their potential electrochemical applications." @default.
- W4386898874 created "2023-09-21" @default.
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- W4386898874 date "2023-12-01" @default.
- W4386898874 modified "2023-09-28" @default.
- W4386898874 title "Controlled synthesis of sulfur-vacancy-enriched sheet-like Ni3S2@ZnS composites for asymmetric supercapacitors with ultralong cycle life" @default.
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- W4386898874 doi "https://doi.org/10.1016/j.jallcom.2023.172214" @default.
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