Yang Wenyao, Zhao Yuetao, He Xin, Chen Yan, Xu Jianhua, Li Shibin, Yang Yajie, Jiang Yadong
State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu, 610054 People's Republic of China.
Nanoscale Res Lett. 2015 May 19;10:222. doi: 10.1186/s11671-015-0932-1. eCollection 2015.
In this paper, we demonstrate the preparation of a flexible poly (3,4-ethylenedioxythiophene) -poly (styrenesulfonate)/reduced graphene oxide (PEDOT-PSS/RGO) film with a layered structure via a simple vacuum filtered method as a high performance electrochemical electrode. The PEDOT-PSS/RGO films are characterized by scanning electron microscopy (SEM), X-ray diffraction, Raman spectroscopy, and Fourier transform infrared (FT-IR) spectrometry. The results indicate that a layer-ordered structure is constructed in this nanocomposite during the vacuum filtering process. The electrochemical performances of the flexible films are characterized by electrochemical impedance spectroscopy, cyclic voltammetry, and galvanostatic charge/discharge. The results reveal that a 193.7 F/g highly specific capacitance of nanocomposite film is achieved at a current density of 500 mA/g. This flexible and self-supporting nanocomposite film exhibits excellent cycling stability, and the capacity retention is 90.6 % after 1000 cycles, which shows promising application as high-performance electrode materials for flexible energy-storage devices.
在本文中，我们展示了通过一种简单的真空过滤方法制备具有层状结构的柔性聚（3,4-乙撑二氧噻吩）-聚（苯乙烯磺酸盐）/还原氧化石墨烯（PEDOT-PSS/RGO）薄膜，作为高性能电化学电极。通过扫描电子显微镜（SEM）、X射线衍射、拉曼光谱和傅里叶变换红外（FT-IR）光谱对PEDOT-PSS/RGO薄膜进行了表征。结果表明，在真空过滤过程中，该纳米复合材料中构建了层状有序结构。通过电化学阻抗谱、循环伏安法和恒电流充/放电对柔性薄膜的电化学性能进行了表征。结果表明，在500 mA/g的电流密度下，纳米复合薄膜实现了193.7 F/g的高比电容。这种柔性自支撑纳米复合薄膜表现出优异的循环稳定性，1000次循环后容量保持率为90.6%，显示出作为柔性储能器件高性能电极材料的应用前景。
