{"title":"Corn Starch Derived Capacitive Carbon Prepared by One-Step K<sub>2</sub>CO<sub>3</sub> Carbonization for Supercapacitors","authors":"Ruiying Wu, Hongyan Pan","doi":"10.4236/msce.2023.1110001","DOIUrl":null,"url":null,"abstract":"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.","PeriodicalId":16172,"journal":{"name":"Journal of Materials Science and Chemical Engineering","volume":"46 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Science and Chemical Engineering","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4236/msce.2023.1110001","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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Abstract
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.
以玉米淀粉为原料，在850℃的温度下，用K2CO3进行简单的熔盐活化，合成了高性能的超级电容器用碳质电极材料。活化1小时后得到的碳材料，由于其多孔结构的协同作用，表现出优异的电容性能。利用这些电极，超级电容器表现出很高的放电电容(在1 a g−1时为248 F g−1)，比未活化K2CO3的活性炭高2.4倍。通过SEM和XRD分析分析电学性能的增强，发现多孔无序结构提供了更多的电荷存储位点，从而提高了电容性能。
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