石墨烯/聚乙撑二氧噻吩薄膜储能特性（英文）

Enhanced electrochemical performance of laser scribed graphene films incorporating poly(3,4-ethylenedioxythiophene) nanoparticles

为了有效利用石墨烯和导电聚合物材料,光雕石墨烯/聚3,4-乙撑二氧噻吩(LSG/PEDOT)复合薄膜通过一种灵巧的光雕工艺制备出来。在此复合薄膜中,每种组分对薄膜的电化学性能提升都有独特的贡献。循环伏安、交流阻抗及恒流充放电测试用来检测薄膜的电化学性能。结果显示,在引入PEDOT纳米颗粒后,LSG/PEDOT复合薄膜显示出更好的能量存储能力。复合薄膜的比容量达到64.33F/cm^3,是光雕石墨烯比容量(3.89F/cm^3)的20倍,复合薄膜经过1000次循环后仍能保持初始容量的94.6%。复合薄膜电化学性能的提升主要是由于引入的PEDOT纳米颗粒既阻挡了石墨烯的层层堆叠,又增加了整个薄膜的比表面积。此种灵活的光雕工艺还可以用来大规模制备超级电容器电极。

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.