A microporous-mesoporous carbon with graphitic structure for a high-rate stable sulfur cathode in carbonate solvent-based Li-S batteries

CORC > 金属研究所 > 中国科学院金属研究所

	A microporous-mesoporous carbon with graphitic structure for a high-rate stable sulfur cathode in carbonate solvent-based Li-S batteries
	D. W. Wang ; G. M. Zhou ; F. Li ; K. H. Wu ; G. Q. Lu ; H. M. Cheng ; I. R. Gentle
刊名	Physical Chemistry Chemical Physics
	2012
卷号	14 期号:24 页码:8703-8710
关键词	rechargeable lithium batteries electrochemical properties secondary batteries cell electrolyte high-capacity high-power performance discharge composites energy
ISSN号	1463-9076
中文摘要	A microporous-mesoporous carbon with graphitic structure was developed as a matrix for the sulfur cathode of a Li-S cell using a mixed carbonate electrolyte. Sulfur was selectively introduced into the carbon micropores by a melt adsorption-solvent extraction strategy. The micropores act as solvent-restricted reactors for sulfur lithiation that promise long cycle stability. The mesopores remain unfilled and provide an ion migration pathway, while the graphitic structure contributes significantly to low-resistance electron transfer. The selective distribution of sulfur in micropores was characterized by X-ray photoelectron spectroscopy (XPS), nitrogen cryosorption analysis, transmission electron microscopy (TEM), X-ray powder diffraction and Raman spectroscopy. The high-rate stable lithiation-delithiation of the carbon-sulfur cathode was evaluated using galvanostatic charge-discharge tests, cyclic voltammetry and electrochemical impedance spectroscopy. The cathode is able to operate reversibly over 800 cycles with a 1.8 C discharge-recharge rate. This integration of a micropore reactor, a mesopore ion reservoir, and a graphitic electron conductor represents a generalized strategy to be adopted in research on advanced sulfur cathodes.
原文出处	://WOS:000304605600028
公开日期	2013-02-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/60279]
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,G. M. Zhou,F. Li,et al. A microporous-mesoporous carbon with graphitic structure for a high-rate stable sulfur cathode in carbonate solvent-based Li-S batteries[J]. Physical Chemistry Chemical Physics,2012,14(24):8703-8710.
APA	D. W. Wang.,G. M. Zhou.,F. Li.,K. H. Wu.,G. Q. Lu.,...&I. R. Gentle.(2012).A microporous-mesoporous carbon with graphitic structure for a high-rate stable sulfur cathode in carbonate solvent-based Li-S batteries.Physical Chemistry Chemical Physics,14(24),8703-8710.
MLA	D. W. Wang,et al."A microporous-mesoporous carbon with graphitic structure for a high-rate stable sulfur cathode in carbonate solvent-based Li-S batteries".Physical Chemistry Chemical Physics 14.24(2012):8703-8710.