For effective use of graphene and conducting polymer,the composite films of laser scribed gra-phene(LSG)combined with poly(3,4-ethylenedioxythiophene)(PEDOT)are prepared with a facile laser scri-bing technology.Each c...For effective use of graphene and conducting polymer,the composite films of laser scribed gra-phene(LSG)combined with poly(3,4-ethylenedioxythiophene)(PEDOT)are prepared with a facile laser scri-bing technology.Each component in the hybrid films provides unique and crucial function to achieve optimizedelectrochemical properties.In the presence of PEDOT nanoparticles,the LSG/PEDOT hybrid films are foundto possess the better energy storage ability.The electrochemical performances of the films are evaluated withcyclic voltammetry(CV),electrochemical impedance spectroscopy(EIS),and galvanostatic charging-dischar-ging(GCD)techniques.Volumetric capacity of composite film(64.33 F/cm3)is much higher than that of purelaser-scribed graphene film(3.89 F/cm3).The hybrid film exhibits excellent charge/discharge rate and goodcycling stability,retaining 94.6%of its initial charge after 1000 cycles.The electrochemical performance im-provement is primarily due to the effect of PEDOT nanoparticles in prevention of agglomeration of LSG layersand the increased surface areas accessible to electrolyte ions.It is anticipated that the PEDOT nanoparticles in-serted into graphene oxide layers following laser scribing reduction procedure could be a promising large scalefabrication method for supercapacitor electrodes.展开更多
基金supported by National Natural Science Foundation of China(51477026,61471085)
文摘For effective use of graphene and conducting polymer,the composite films of laser scribed gra-phene(LSG)combined with poly(3,4-ethylenedioxythiophene)(PEDOT)are prepared with a facile laser scri-bing technology.Each component in the hybrid films provides unique and crucial function to achieve optimizedelectrochemical properties.In the presence of PEDOT nanoparticles,the LSG/PEDOT hybrid films are foundto possess the better energy storage ability.The electrochemical performances of the films are evaluated withcyclic voltammetry(CV),electrochemical impedance spectroscopy(EIS),and galvanostatic charging-dischar-ging(GCD)techniques.Volumetric capacity of composite film(64.33 F/cm3)is much higher than that of purelaser-scribed graphene film(3.89 F/cm3).The hybrid film exhibits excellent charge/discharge rate and goodcycling stability,retaining 94.6%of its initial charge after 1000 cycles.The electrochemical performance im-provement is primarily due to the effect of PEDOT nanoparticles in prevention of agglomeration of LSG layersand the increased surface areas accessible to electrolyte ions.It is anticipated that the PEDOT nanoparticles in-serted into graphene oxide layers following laser scribing reduction procedure could be a promising large scalefabrication method for supercapacitor electrodes.
