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Nitrogen-enriched bituminous coal-based active carbons as materials for supercapacitors

机译：富氮烟煤基活性炭作为超级电容器的材料

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摘要

The paper presents the results of a study on obtaining N-enriched active carbons from bituminous coal and on testing its use as an electrode material in supercapacitors. The coal was carbonised, activated with KOH and ammoxidised by a mixture of ammonia and air at the ratio 1:3 at 300 ℃ or 350 ℃, at different stages of the production, that is, at those of precursor, carbonisate, and active carbon. The products were microporous N-enriched active carbon samples of well-developed surface area reaching from 1577 to 2510 m~2/g and containing 1.0 to 8.5 wt% of nitrogen. The XPS measurements have shown that in the active carbons enriched in nitrogen at the stage of precursor and at the stage of carbonisate, the dominant nitrogen species are the N-5 groups, while in the samples ammoxidised at the last stage of the treatment the dominant nitrogen species are the surface groups of imines and/or nitriles, probably accompanied by amines and amides. The paper reports the results of a comprehensive study of the effect of the structure and chemical composition of a series of active carbon samples of different properties on their capacity performance in water solutions of H_2SO_4 or KOH, with the behaviour of positive and negative electrodes analysed separately.
机译：本文介绍了从烟煤中获取富氮活性炭并测试其在超级电容器中用作电极材料的研究结果。在生产的不同阶段，即在前体，碳酸盐和活性炭的各个阶段，将煤碳化，用KOH活化，并在300℃或350℃下以1：3的比例与氨和空气的混合物进行氨氧化。 。产物是表面积发达的微孔富氮活性炭样品，表面积从1577至2510 m〜2 / g，并且含有1.0至8.5 wt％的氮。 XPS测量表明，在前体阶段和碳酸盐形成阶段富集氮的活性炭中，主要的氮种类为N-5基团，而在处理的最后阶段被氨氧化的样品中，主要的氮种类为N-5基团。氮是亚胺和/或腈的表面基团，可能伴随有胺和酰胺。本文报告了对一系列不同性质的活性炭样品的结构和化学组成对其在H_2SO_4或KOH水溶液中的容量性能的影响的综合研究结果，并分别分析了正极和负极的行为。

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  • 来源
    《Fuel》 |2010年第11期|P.3457-3467|共11页
  • 作者

    R. Pietrzak; K. Jurewicz; P. Nowicki; K. Babel; H. Wachowska;

  • 作者单位

    Laboratory of Coal Chemistry and Technology, Faculty of Chemistry, A. Mickiewicz University, Grunwaldzka 6, 60-780 Poznan, Poland;

    rnInstitute of Chemistry and Technical Electrochemistry, Poznan University of Technology, Piotrowo 3, 60-965 Poznan, Poland;

    rnLaboratory of Coal Chemistry and Technology, Faculty of Chemistry, A. Mickiewicz University, Grunwaldzka 6, 60-780 Poznan, Poland;

    rnInstitute of Chemical Wood Technology, University of Life Sciences in Poznan, Wojska Polskiego 38/42, 60-635 Poznan, Poland;

    rnLaboratory of Coal Chemistry and Technology, Faculty of Chemistry, A. Mickiewicz University, Grunwaldzka 6, 60-780 Poznan, Poland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    activated carbon; ammoxidation; activation; XPS; supercapacitors;

    机译：活性炭;氨氧化激活;XPS;超级电容器;

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