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Gamma-radiated biochar carbon for improved supercapacitor performance

机译：伽马辐射的Biochar碳改善了超级电容器性能

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摘要

Biochar carbon YP-50 exposed to gamma radiation at 50 kGy, 100 kGy, and 150 kGy was used as an electrode for an electric double-layer capacitor. The gamma radiation affected the pore structure and pore volume of the biochar electrodes. The optimized surface morphology, pore structure, and pore volume of the biochar with an irradiation dose of 100 kGy showed outstanding specific capacitance of 246.2 F g ~(?1) compared to the untreated biochar (115.3 F g ~(?1) ). The irradiation dose of 100 kGy exhibited higher specific power and specific energy of 0.1 kW kg ~(?1) and 34.2 W h kg ~(?1) respectively, with a capacity retention of above 96% after 10?000 cycles at a current density of 2 A g ~(?1) . This improvement can be attributed to the decrease in average particle size, an increase in the porosity of biochar carbon. Besides, the charge transfer resistance of supercapacitor is significantly reduced from 21.7 Ω to 7.4 Ω after treating the biochar carbon with 100 kGy gamma radiation, which implies an increase in conductivity. This gamma radiation strategy to pretreat the carbon material for improving the properties of carbon materials can be promising for the development of high-performance supercapacitors for large-scale applications.
机译：Biochar碳YP-50暴露于50kGy，100kgy和150kGy的伽马辐射用作电极的电极，用于电动双层电容器。伽马辐射影响了生物炭电极的孔结构和孔体积。与未处理的生物炭相比，具有100kGy的辐照剂量为100kGy的BioChar的优化表面形态，孔隙结构和孔隙体积显示出246.2°F G〜（α1）的出色电容（115.3f g〜（α1））。 100kGy的辐照剂量分别显示出更高的特定功率和特定能量为0.1kg kg〜（α1）和34.2 w h kg〜（α1），在电流下10次循环后的容量保持高达96％密度为2 a g〜（？1）。这种改进可以归因于平均粒径的降低，生物炭碳的孔隙率增加。此外，超级电容器的电荷传递电阻在处理具有100kGy伽马辐射的生物炭碳后显着降低到7.4Ω，这意味着导电性的增加。这种伽马辐射策略预处理用于改善碳材料性质的碳材料，可以对大型应用的高性能超级电容器进行开发。

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