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

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	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
	2012
发表期刊	Physical Chemistry Chemical Physics
ISSN	1463-9076
卷号	14 期号:24 页码:8703-8710
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.
部门归属	[zhou, guangmin; li, feng; cheng, hui-ming] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [wang, da-wei; lu, gao qing (max)] univ queensland, arc ctr excellence funct nanomat, australian inst bioengn & nanotechnol, brisbane, qld 4072, australia. [wu, kuang-hsu; gentle, ian r.] univ queensland, sch chem & mol biosci, brisbane, qld 4072, australia.;cheng, hm (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china.;d.wang6@uq.edu.au; cheng@imr.ac.cn; i.gentle@uq.edu.au
关键词	Rechargeable Lithium Batteries Electrochemical Properties Secondary Batteries Cell Electrolyte High-capacity High-power Performance Discharge Composites Energy
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60279
专题	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.