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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。
In order to effectively utilize graphene and conductive polymer materials, light-engraving graphene / poly-3,4-ethylenedioxythiophene (LSG / PEDOT) composite films are prepared by a dexterous light-engraving process. In this composite film, each component has a unique contribution to the improvement of the electrochemical performance of the film. Cyclic voltammetry, AC impedance and constant current charge and discharge test is used to test the electrochemical properties of thin films. The results show that LSG / PEDOT composite films show better energy storage capacity after the introduction of PEDOT nanoparticles. The specific capacity of the composite film reached 64.33F / cm ~ 3, which was 20 times of that of graphene (3.89F / cm ~ 3). The composite film still retained 94.6% of initial capacity after 1000 cycles. The improvement of electrochemical performance of the composite thin film is mainly due to the introduction of PEDOT nanoparticles not only block the layer stack of graphene, but also increase the specific surface area of the entire film. This flexible light-engraving process can also be used for large-scale production of ultracapacitor electrodes.