超级电容器
热解
氮气
化学工程
惰性气体
碳纤维
无机化学
打赌理论
电容
盐(化学)
水溶液
材料科学
比表面积
镁
电解质
电极
化学
活性炭
核化学
有机化学
复合数
催化作用
吸附
复合材料
物理化学
工程类
作者
Bin Xu,Hui Duan,Mo Chu,Gaoping Cao,Yusheng Yang
出处
期刊:Journal of materials chemistry. A, Materials for energy and sustainability
[The Royal Society of Chemistry]
日期:2013-01-01
卷期号:1 (14): 4565-4565
被引量:217
摘要
A very simple, activation-free method for preparing nitrogen-doped porous carbon with high surface area for supercapacitors by direct pyrolysis of a nitrogen-containing organic salt, ethylenediamine tetraacetic acid (EDTA) disodium magnesium salt, in an inert atmosphere is presented. As the pyrolysis temperature increases from 500 to 900 °C, both the BET surface area and pore volume of the disodium magnesium EDTA-derived carbons increase and reach up to 1811 m2 g−1 and 1.16 cm3 g−1, respectively, while the nitrogen content decreases from 11.14 at.% to 1.13 at.%. The carbon obtained at a moderate pyrolysis temperature of 700 °C possesses a balanced surface area (1258 m2 g−1) and nitrogen content (5.43 at.%), exhibits high capacitance (281 F g−1), good rate capability (196 F g−1 at 20 A g−1) and cycle durability in 6 mol L−1 KOH aqueous electrolytes.
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