Nitrogen-Doped Carbon Monolith for Alkaline Supercapacitors and Understanding Nitrogen-Induced Redox Transitions

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	Nitrogen-Doped Carbon Monolith for Alkaline Supercapacitors and Understanding Nitrogen-Induced Redox Transitions
	D. W. Wang ; F. Li ; L. C. Yin ; X. Lu ; Z. G. Chen ; I. R. Gentle ; G. Q. Lu ; H. M. Cheng
刊名	Chemistry-a European Journal
	2012
卷号	18 期号:17 页码:5345-5351
关键词	carbon doping microporous materials redox chemistry supercapacitors electrochemical performance mesoporous carbon activated carbon functional-groups enriched carbons brown-coal capacitance ammoxidation microstructure carbonization
ISSN号	0947-6539
中文摘要	A nitrogen-doped porous carbon monolith was synthesized as a pseudo-capacitive electrode for use in alkaline supercapacitors. Ammonia-assisted carbonization was used to dope the surface with nitrogen heteroatoms in a way that replaced carbon atoms but kept the oxygen content constant. Ammonia treatment expanded the micropore size-distributions and increased the specific surface area from 383 m2?g-1 to 679 m2?g-1. The nitrogen-containing porous carbon material showed a higher capacitance (246 F?g-1) in comparison with the nitrogen-free one (186 F?g-1). Ex situ electrochemical spectroscopy was used to investigate the evolution of the nitrogen-containing functional groups on the surface of the N-doped carbon electrodes in a three-electrode cell. In addition, first-principles calculations were explored regarding the electronic structures of different nitrogen groups to determine their relative redox potentials. We proposed possible redox reaction pathways based on the calculated redox affinity of different groups and surface analysis, which involved the reversible attachment/detachment of hydroxy groups between pyridone and pyridine. The oxidation of nitrogen atoms in pyridine was also suggested as a possible reaction pathway.
原文出处	://WOS:000302868100029
公开日期	2013-02-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/60278]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	D. W. Wang,F. Li,L. C. Yin,et al. Nitrogen-Doped Carbon Monolith for Alkaline Supercapacitors and Understanding Nitrogen-Induced Redox Transitions[J]. Chemistry-a European Journal,2012,18(17):5345-5351.
APA	D. W. Wang.,F. Li.,L. C. Yin.,X. Lu.,Z. G. Chen.,...&H. M. Cheng.(2012).Nitrogen-Doped Carbon Monolith for Alkaline Supercapacitors and Understanding Nitrogen-Induced Redox Transitions.Chemistry-a European Journal,18(17),5345-5351.
MLA	D. W. Wang,et al."Nitrogen-Doped Carbon Monolith for Alkaline Supercapacitors and Understanding Nitrogen-Induced Redox Transitions".Chemistry-a European Journal 18.17(2012):5345-5351.