Control of the interface graphitized/amorphous carbon of biomass-derived carbon microspheres for symmetric supercapacitors. Issue 16 (27th July 2021)

• Record Type: Journal Article
• Authors: Wang, Hongqiang; Li, Xin; Peng, Jiming; Cai, Yezheng; Jiang, Juantao; Li, Qingyu
• Is Part Of: Nanoscale advances. Volume 3:Issue 16(2021)
• Page Start: 4858
• Page End: 4865
• Publication Date: 2021-07-27
• Subjects: 620.5
• DOI: 10.1039/d1na00262g
• Languages: English
• ISSNs: 2516-0230

Abstract

Abstract : Rational interface control of porous carbon electrode materials is of significance for achieving efficient supercapacitors. Abstract : Rational interface control of porous carbon electrode materials is of significance for achieving efficient supercapacitors. Herein, biomass-derived carbon microspheres with a highly graphitized porous surface and amorphous subsurface were well constructed via a flexible coupled catalysis-activation process. The unique structure not only endows the carbon microspheres with rapid electron transfer but also an ultra-high specific surface area. Owing to the optimized graphitized/amorphous structure, the obtained graphitized and activated starch-derived carbon microspheres display obviously impressive energy storage capability among the reported starch-derived carbon materials, even though they were evaluated in a narrow voltage window. The assembled symmetrical supercapacitor based on the optimized carbon microspheres exhibits a high capacitance of 198 F g −1 at 1 A g −1, a high energy density of 14.67 W h kg −1 at a power density of 4142.80 W kg −1, robust cycle performance, and good rate performance in alkaline aqueous electrolyte. This work provides a strategy for flexible construction of biomass-derived carbon electrode materials, with an optimized graphitized/amorphous and porous structure, for boosted energy storage in supercapacitor applications.