超级电容器
材料科学
电解质
多孔性
化学工程
比表面积
微型多孔材料
氮气
浸出(土壤学)
碳纤维
电极
功率密度
电容
复合材料
催化作用
有机化学
复合数
化学
物理化学
工程类
功率(物理)
环境科学
物理
量子力学
土壤科学
土壤水分
作者
Feng Gao,Ya-qiao Xie,Yunhao Zang,Gang Zhou,Jiangying Qu,Mingbo Wu
标识
DOI:10.1016/s1872-5805(21)60046-x
摘要
The highly efficient synthesis of nitrogen-doped carbons with different pore structures is reported using shrimp shell as the carbon and nitrogen source, and its CaCO3 component as the hard template and activator. The CaCO3 content of shrimp shells can be easily changed by changing the leaching time to remove it. CaCO3 acts as the activator and template to tailor the pore sizes of the carbons. CO2 from the decomposition of CaCO3 also plays an activating role. Their specific surface areas, pore volumes, ratios of micropore volume to total pore volume can be adjusted in the ranges 117.6-1 137 m2 g−1, 0.14-0.64 cm3 g−1, and 0-73.4%, respectively. When used as the electrodes of a supercapacitor, the porous carbon obtained with a leaching time of 92 min has a high capacitance of 328 F g−1 at 0.05 A g−1 in a 6 mol L−1 KOH electrolyte and 619.2 F g−1 at 0.05 A g−1 in a 1 mol L−1 H2SO4 electrolyte. Its corresponding energy density at a power density of 1 470.9 W kg−1 is 26.0 Wh kg−1. This study provides a low cost method for fabricating porous carbons from biomass with a high added value.
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