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High Performance of Chitosan Derived Porous Carbon as Supercapacitor Electrodes

机译:壳聚糖衍生的多孔碳作为超级电容器电极的高性能

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Chitosan, a renewable biomass derivative, was used as electrode material with a facile pyrolysis andactivation process for supercapacitors. The physical and electrochemical performances of the as-prepared chitosan-based hierarchical porous carbon (CHPC) were evidently affected by the mass ratioof powder to KOH and the carbonization temperature. The sample obtained at the best powder/KOHratio of 1:1 exhibits meaningful structural characteristics: optimized interconnected hierarchical porestructure and high specific surface area (863.58 m 2 g -1 ). It possesses excellent capacitive property withhigh specific capacitance of 310 F g -1 in 6 mol L -1 KOH electrolyte at a current density of 1 A g -1 , andenhanced rate capability (231 F g -1 can be retained at 10 A g -1 ). Additionally, it shows excellent capacityretention of 80% after 10 000 cycles at 10 A g -1 . The efficiently combined and optimized synthesisprocess and the excellent electrochemical characteristics are of strategic guiding significance to thelarge-scale application of high-performance supercapacitors.
机译:壳聚糖是一种可再生的生物质衍生物,被用作电极材料,具有超级电容器的快速热解和活化过程。制备的壳聚糖基分级多孔碳(CHPC)的物理和电化学性能明显受粉末与KOH的质量比和碳化温度的影响。以1:1的最佳粉末/ KOH比获得的样品具有有意义的结构特征:优化的相互连接的孔结构和高比表面积(863.58 m 2 g -1)。它具有优异的电容特性,在6 mol L -1 KOH电解质中,在1 A g -1的电流密度下具有310 F g -1的高比电容,并具有增强的倍率能力(在10 A g-下可以保持231 F g -1的容量)。 1)。此外,在10 A g -1下进行10 000次循环后,它显示出极好的容量保持率,为80%。有效组合和优化的合成工艺以及优异的电化学性能对高性能超级电容器的大规模应用具有战略指导意义。

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