Metal Oxide/Sulfide Modified Graphene Composite Fibers for Flexible Supercapacitors
Fiber-based flexible supercapacitors have attracted much attention in the field of wearable electronics and smart fabrics due to their high power density,long cycle life,miniaturizatio,and excellent flexibility.This study prepared molybdenum disulfide/graphene composite fibers by confined hydrothermal method using graphene oxide and flake molybdenum disulfide as mixed spinning solution.And ruthenium dioxide@molybdenum disulfide / gra-phene composite fibers (RuO2@MoS2/GF) were prepared by in-situ uniform deposition of ruthenium dioxide on the surface of the fibers.SEM,TEM,XPS and XRD were used to characterize the structure and morphology of the composite fibers and to assemble fiber-based supercapacitors and evaluate their electrochemical performance in gel electrolyte systems.The results show that the specific capacitance of RuO2@MoS2/GF is 685 mF·cm-2 at a current density of 0.2 mA·cm-2 .At the same time,it has good cycle stability.After 6000 cycles of charge and discharge,the specific capacitance retention rate is 80％.By connecting the fiber-type supercapacitor in series,the electronic timer can promote the application of graphene fiber in the field of intelligent wearable.
万方数据
维普
