In order to better realize the application of graphene-based fibers in flexible wearable energy storage de-vices,this study prepared graphene oxide by the modified Hummers method.It was used with PEDOT:PSS disper-sion to prepare composite spinning solution of a certain concentration.And PEDOT:PSS / graphene oxide compos-ite fibers were fabricated by wet-spinning with calcium chloride solution as coagulation bath.PEDOT:PSS / gra-phene composite fibers were obtained by chemical reduction of the as-prepared graphene oxides based fibers in the aqueous solution of hydroiodic acid.The structure and morphology measurement of PEDOT:PSS / graphene com-posite fibers show that the diameter of the composite fibers is about 95 µm,and the surface of composite fibers char-acterizes wrinkled morphology.Flexible supercapacitors were assembled by PEDOT: PSS/graphene composite fi-bers,and their electrochemical properties were evaluated in different gel-like electrolyte systems.The results show that PEDOT:PSS/graphene composite fibers with 20％ PEDOT:PSS exhibit the best electrochemical properties in PVA/H2 SO4 gel electrolyte;when the current density is 0.14 mA/cm2 ,the specific areal capacitance is 420.7 mF/cm2 ,and the energy density is 9.35 µW h/cm2 ,showing good electrochemical performance,which can power to electric thermo-hygrometer and promote the application of graphene composite fibers in flexible wearable energy storage de-vices.
关键词
PEDOT:PSS/石墨烯纤维/湿法纺丝/柔性超级电容器/能量密度
Key words
PEDOT:PSS/graphene fiber/wet-spinning/flexible supercapacitor/energy density
万方数据