Release time:2025-07-14  Hits:

• Key Words:EFFICIENT
• Abstract:Vacancy engineering is an effective strategy for modulating the electronic transport characteristics of electrode materials and has become a widely adopted approach to enhancing the performance of supercapacitor electrodes. In this study, a PC@CoNi2S4 nanocomposite was initially prepared using eggplant-derived carbon (PC) as the carrier. The target gamma-PC@CoNi2S4 electrode material, containing sulfur vacancies, was then obtained through a simple soaking process. Characterization results reveal that gamma-PC@CoNi2S4 exhibits excellent electrochemical performance, owing to the synergistic effect of the high conductivity and chemical stability of the PC carrier, the high capacitance of the CoNi2S4 active material, and the abundant active sites introduced by sulfur vacancies. Specifically, it achieves an impressive specific capacitance of 1838.94 F g-1 at 1 A g-1 and retains a remarkable rate capability of 73.9 % at 50 A g-1 . Furthermore, a supercapacitor device assembled with gamma-PC@CoNi2S4 and activated carbon (AC) attains an energy density of 50 Wh kg-1 at a power density of 924.14 W kg-1 . This study provides valuable insights into the design and fabrication of high-performance supercapacitor electrode material.
• Volume:1020
• Issue:-
• Translation or Not:no