Matsushita Satoshi, Yan Bairu, Matsui Takanori, Kim Je-Deok, Akagi Kazuo
Polymer Electrolyte Fuel Cell Group, Global Research Center for Environmental and Energy Based on Nanomaterials Science (GREEN), National Institute for Materials Science (NIMS) 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
Department of Polymer Chemistry, Kyoto University Katsura Kyoto 615-8510 Japan.
RSC Adv. 2018 May 29;8(35):19512-19523. doi: 10.1039/c8ra00267c. eCollection 2018 May 25.
We present a facile preparation method for carbonaceous film electrodes using poly(3,4-ethylenedioxythiophene) (PEDOT) and polyacetylene (PA) films as precursors a morphology-retaining carbonization process. Carbonization was performed on acceptor-doped conjugated polymer films in the temperature range of 600-1100 °C. The obtained carbonaceous films had similar surface morphologies to those of the original conjugated polymer films. The carbonaceous film prepared from the electrochemically synthesized PEDOT film and the carbon film prepared from the chemically synthesized PA film showed hierarchical porous structures consisting of granular and fibril morphologies, respectively. The PEDOT and PA films carbonized at 1100 °C exhibited average electrical conductivities of 2.1 × 10 S cm and 9.9 × 10 S cm, respectively. The carbonaceous films could be used as binder-free carbon electrodes in supercapacitors, and the PEDOT-based carbonaceous film prepared in the range of 1000-1100 °C exhibited the most efficient performance on the basis of the electrochemical capacitance in neutral and alkaline aqueous solutions determined from cyclic voltammograms and galvanostatic charge/discharge curves. This approach requires no binders/additives and no further activation processes or additional treatments for the enhancement of the capacities of the carbon materials, enabling one-step fabrication and their direct use as carbon electrodes for energy-storage devices. This is the first report of PEDOT- and PA-based carbonaceous films being used as carbon electrodes in supercapacitors.
我们提出了一种简便的碳质薄膜电极制备方法，该方法使用聚（3,4-乙撑二氧噻吩）（PEDOT）和聚乙炔（PA）薄膜作为前驱体——一种保留形态的碳化过程。碳化是在受体掺杂的共轭聚合物薄膜上于600 - 1100°C的温度范围内进行的。所获得的碳质薄膜具有与原始共轭聚合物薄膜相似的表面形态。由电化学合成的PEDOT薄膜制备的碳质薄膜和由化学合成的PA薄膜制备的碳膜分别呈现出由颗粒状和纤维状形态组成的分级多孔结构。在1100°C碳化的PEDOT和PA薄膜分别表现出平均电导率为2.1×10 S cm和9.9×10 S cm。这些碳质薄膜可用作超级电容器中的无粘结剂碳电极，并且基于循环伏安图和恒电流充/放电曲线在中性和碱性水溶液中测定的电化学电容，在1000 - 1100°C范围内制备的基于PEDOT的碳质薄膜表现出最有效的性能。这种方法不需要粘结剂/添加剂，也不需要进一步的活化过程或额外处理来提高碳材料的容量，能够一步制备并直接用作储能装置的碳电极。这是关于基于PEDOT和PA的碳质薄膜用作超级电容器中的碳电极的首次报道。
