摘要
采用普通的生物质红薯制备活性炭,并组装成双层电容器,使用循环伏安、恒流充放电和交流阻抗的表征方法研究所制备的活性炭电极在两种不同电解液中的电化学性能。研究结果表明:使用KOH电解液,电容器的比电容更高;相比于KOH电解液,活性炭的比电压在Na2SO4溶液中更高,且能量密度更好;因此需要高电压和高能量密度时,硫酸盐更适合做超级电容器电解质。
In the experiment, the activated carbon electrodes were prepared from biomass sweet potato and assembled into a double-layer supercapacitor. The electrochemical properties of the prepared ac-tivated carbon electrodes in two different electrolytes were studied by cyclic voltammetry, gal-vanostatic charge discharge and electrochemical impedance spectroscopy. The results show that the specific capacitance of the supercapacitor is higher when KOH electrolyte is used. Compared with KOH electrolyte, the specific voltage and energy density of the activated carbon are higher in Na2SO4 electrolyte. Therefore, sulfate is more suitable electrolyte for supercapacitor when high voltage and high energy density are needed.
出处
《材料科学》
CAS
2021年第5期643-648,共6页
Material Sciences
