Hierarchical porous carbons prepared from direct coal liquefaction residue and coal for supercapacitor electrodes
Hierarchical porous carbons prepared from direct coal liquefaction residue and coal for supercapacitor electrodes
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煤直接液化残渣和煤制备超级电容器电极用多级孔碳
DOI：
10.1016/j.carbon.2012.12.030
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发表时间：
2013-04
期刊：
影响因子：
10.9
通讯作者：
Haoquan Hu
中科院分区：
文献类型：
--
作者：
Jianbo Zhang;Lijun Jin;Jie Cheng;Haoquan Hu
以煤液化残渣为原料，以低灰分的神华煤和高灰分的胜利煤为原料，采用KOH活化法制备了多级多孔炭，并将其用作超级电容器的电极材料。以MgO和Al 2 O3两种金属氧化物和蔗糖、尿素和十六烷基三甲基溴化铵三种有机物为添加剂，研究了它们对炭材料结构和电容性能的影响。结果表明，与KOH反应生成的金属氧化物和/或其盐可作为纳米孔的填充剂，而有机添加剂分解产生的气体可使纳米孔发展和/或变宽。这两种作用都有利于低灰分煤或低灰分SH煤生成的碳具有额外的中孔和大孔，但破坏了高灰分SL煤生成的碳的结构。与未添加任何添加剂的炭相比，添加各添加剂的优化分级多孔炭用作超级电容器电极时，具有更小的等效电阻、更高的充放电倍率容量和优异的循环稳定性。
Hierarchical porous carbons were prepared from a coal liquefaction residue (CLR) and two coals, Shenhua (SH) coal with low and Shengli (SL) coal with high ash content, by KOH activation with the addition of some additives, and used as the electrode for supercapacitors. Two metal oxides (MgO and Al2O3) and three organic materials (sugar, urea and cetyltrimethylammonium bromide) were used as the additives, to investigate their effects on the structure and capacitive performance of the resultant carbons. The results show that the metal oxide and/or its salt formed by the reaction with KOH can serve as space fillers of nanopores in the carbonized carbon, while the gases produced by the decomposition of the organic additive can develop and/or widen some pores. Both help the carbon produced from CLR or the SH coal with low ash content to have additional meso- and macropores, but destroy the structure of the carbon from the SL coal with high ash content. Compared with the carbon without any additive, the optimized hierarchical porous carbon with each additive shows a smaller equivalent resistance, much higher capacitance in a wide range of charge–discharge rates and excellent cycle stability when the carbon was used as supercapacitor electrode.
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DOI：
10.1016/j.jpowsour.2010.12.111
发表时间：
2011-09
期刊：
The Lancet
影响因子：
--
作者：
V. Ruiz;A. Pandolfo
通讯作者：
V. Ruiz;A. Pandolfo
影响因子：
5.2
作者：
L. Zubizarreta;A. Arenillas;J. Pirard;J. J. Pis-J.;N. Job
通讯作者：
L. Zubizarreta;A. Arenillas;J. Pirard;J. J. Pis-J.;N. Job
影响因子：
9.2
作者：
Youlong Xu;Jie Wang;Wei-Feng Sun;Shihai Wang
通讯作者：
Youlong Xu;Jie Wang;Wei-Feng Sun;Shihai Wang
影响因子：
6.6
作者：
Kierzek, K;Frackowiak, E;Machnikowski, J
通讯作者：
Machnikowski, J
影响因子：
--
作者：
Lei, Zhibin;Christov, Nikolay;Zhao, X. S.
通讯作者：
Zhao, X. S.