Ammonia Treatment of Activated Carbon Powders for Supercapacitor Electrode Application
Ammonia Treatment of Activated Carbon Powders for Supercapacitor Electrode Application
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DOI：
10.1149/2.051404jes
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发表时间：
2014-01-01
影响因子：
3.9
通讯作者：
Beguin, F.
中科院分区：
文献类型：
--
作者：
Laheaeaer, A.;Delpeux-Ouldriane, S.;Beguin, F.
用氨气或氨气/氮气混合物在不同的高温持续时间下对微孔活性炭粉进行改性，得到电容增强的超级电容器电极材料。XPS分析表明，在氨处理前氧化的碳粉中含氮官能团的含量较高（达4.5 at%）。在400℃处理时引入的N量最高，而在800℃处理后观察到广泛的活化，改性碳粉在1 mol dm(-3) H2SO4溶液中显示出高达30%的重量电容增加。在1万次恒流充放电循环中，根据所使用的改性材料的不同，电容下降了2.5 - 10%。(C) 2014电化学学会。版权所有。
Microporous activated carbon powder was modified by ammonia gas or ammonia/nitrogen mixture at elevated temperatures with different duration in order to obtain supercapacitor electrode materials with enhanced capacitance. XPS analysis showed higher amount of nitrogen containing functional groups (up to 4.5 at%) incorporated into carbon powders which were oxidized before ammonia treatment. The highest amount of N was introduced by treatments at 400 degrees C, whereas extensive activation was observed after treatment at 800 degrees C. The modified carbon powders demonstrated an increase in gravimetric capacitance up to 30% in 1 mol dm(-3) H2SO4 solution. During 10,000 constant current charge/discharge cycles, the capacitance decreased by 2.5 to 10%, depending on the modified material used. (C) 2014 The Electrochemical Society. All rights reserved.