Document Type: Research Paper
Department of Chemistry, School of Sciences University of Imam Hossein, Tehran, Iran
Faculty of Chemistry, University of Sharif, Tehran, Iran
In the current study, we report new flexible, free standing and high performance electrodes for electrochemical supercapacitors developed througha scalable but simple and efficient approach. Highly porous structures based on carbon fiber and poly (vinyl alcohol) (PVA) were used as a pattern. The electrochemical performances of Carbon fiber/GO-MnO2/CNT supercapacitors were characterized using cyclic voltammetry, galvanostatic charge/discharge and impedance spectroscopy techniques. The porosity of the electrode material was determined by scanning electron microscopy. The electrode specific capacitance was calculated to be 68Fcm-150 mv/s from cyclic voltammetry. The prepared films could be directly used as flexible supercapacitor electrodes and exhibited a highly specific capacitance and good cycle stability. The porous structures of films pavethe way for emission without blocking for electrolyteions and increase the specific area of the material. The electrochemical analysis confirms that the Carbon fiber/GO-MnO2/CNT has improved particular capacitance compared to Carbon fiber/GO-MnO2 and Carbon fiber/MnO2. This study offers a new extremely light, conductive, inexpensive and environmentally friend electrode material that are promising for future flexible and efficient electrochemical supercapacitors.