Abstract
Co3V2O8/Co3O4/Ti3C2Tx composite was easily synthesized via one-step succinct-operated hydrothermal process.The interconnected Co3V2O8/Co3O4 nanowires network can in-situ grow and anchor on the surface of Ti3C2Tx via the strong Co-F bonds and contribute tremendously to depress Ti3C2Tx self-restacking.Profiting from the synergistically interplayed effect among the multiple interfaces and high conductivity of Ti3C2Tx as well as outstanding stability of the as-designed nanostruc-ture,the optimum Co3V2O8/Co3O4/Ti3C2Tx electrode reaches a commendable specific capacitance(up to 3800 mF·cm-2),great rate capability(80％capacitance retention after 20-times current increasing),and preeminent cycling stability(95.4％/85.5％retention at 7000th/20,000th cycle).Moreover,the all-solid-state asymmetric supercapacitor based on Co3V2O8/Co3O4/Ti3C2Tx and active carbon can deliver a high energy density of 84.0 pWh·cm-2 at the power energy of 3.2 mW·cm-2,and excellent cycling durability with 87.0％of initial capacitance retention upon 20,000 loops.This work pro-vides a practicable pathway to tailor MXene-based com-posites for high-performance supercapacitor.
基金项目
国家自然科学基金(52201254)
山东省自然科学基金(ZR2020MB090)
山东省自然科学基金(ZR2020QE012)
Project of"20 items of University"of Jinan(202228046)
Taishan Scholar Project of Shandong Province()
NETL
NSTL
万方数据