Self-grown MnO2 nanosheets on carbon fiber paper as high-performance supercapacitors electrodes

MnO 2 was self-grown on carbon fiber paper (CFP) via a facile redox reaction , which is constructed by interconnected ultrathin nanosheets array. The CFP acts as both a supporting scaffold and a reducing agent for MnO 2 growth. The obtained MnO 2 /CFP composite was directly used as electrodes for supercapacitors , delivering a high specific capacitance of 713.7   F/g (0.5   A/g). Cyclic stability testing of the MnO 2 /CFP electrode reveals 86.8% retention in specific capacitance after 1200 cycles at 5.0   A/g. The nanosheet morphology of the MnO 2 on CFP brings about more efficient electroactive sites and facilitates the electrolyte penetration, allowing greater access for ions to active reaction sites. Hence, the attractive electrochemical performances exhibited by this MnO 2 /CFP electrode endow them potentially promising candidates for supercapacitors.