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
	2012
发表期刊	Chemistry-a European Journal
ISSN	0947-6539
卷号	18 期号:17 页码:5345-5351
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.
部门归属	[wang, da-wei; li, feng; yin, li-chang; lu, xu; cheng, hui-ming] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [wang, da-wei; chen, zhi-gang; gentle, ian r.; lu, gao qing (max)] univ queensland, australian inst bioengn & nanotechnol, arc ctr excellence funct nanomat, brisbane, qld 4072, australia.;cheng, hm (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china.;cheng@imr.ac.cn
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
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60278
专题	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.