Supercapacitors are regarded as promising energy storage devices with the advantages of highpower density and long cycling life.However,restricted by the intrinsic electrical double layer mechanism of carbon electrodes,the supercapacitors exhibit relatively low energy density,which inhibits their practical applications.Seeking for electrode materials with high theoretical specific capacitance and introducing redox additives into electrolyte are recognized as two effective strategies to improve the electrochemical performances of supercapacitors...
