Corn Starch Derived Capacitive Carbon Prepared by One-Step K₂CO₃ Carbonization for Supercapacitors  

作　　者：Ruiying Wu Hongyan Pan Ruiying Wu;Hongyan Pan(Hefei No. 8 High School, Hefei, China;Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China)

机构地区：[1]Hefei No. 8 High School, Hefei, China [2]Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China

出　　处：《Journal of Materials Science and Chemical Engineering》2023年第10期1-7,共7页材料科学与化学工程（英文）

摘　　要：High-performance carbonaceous electrode materials for supercapacitors were synthesized by subjecting corn starch to a simple molten salt activation process with K₂CO₃ at a temperature of 850˚C. The resulting carbon material, obtained after activating for 1 hour, displayed excellent capacitive properties due to the synergistic effects of its porous structure. Utilizing these electrodes, the supercapacitor exhibited a high discharge capacitance (248 F g⁻¹ at 1 A g⁻¹), which is 2.4 times higher than that of activated carbon without K₂CO₃ activation. The enhancement in electrical performance was analyzed through SEM and XRD analysis, revealing that the porous and disordered structure provides a greater number of charge storage sites, resulting in improved capacitive performance.High-performance carbonaceous electrode materials for supercapacitors were synthesized by subjecting corn starch to a simple molten salt activation process with K₂CO₃ at a temperature of 850˚C. The resulting carbon material, obtained after activating for 1 hour, displayed excellent capacitive properties due to the synergistic effects of its porous structure. Utilizing these electrodes, the supercapacitor exhibited a high discharge capacitance (248 F g⁻¹ at 1 A g⁻¹), which is 2.4 times higher than that of activated carbon without K₂CO₃ activation. The enhancement in electrical performance was analyzed through SEM and XRD analysis, revealing that the porous and disordered structure provides a greater number of charge storage sites, resulting in improved capacitive performance.

关 键 词：Activated Carbon Porous Structure Corn Starch SUPERCAPACITORS 

分 类 号：TG1[金属学及工艺—金属学]