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	Electrochemical characteristics of sulfur composite cathode for reversible lithium storage
	He, Xiangming ; Ren, Jianguo ; Wang, Li ; Pu, Weihua ; Wan, Chunrong ; Jiang, Changyin
	2010-10-12 ; 2010-10-12
关键词	Sulfur composite cathode materials Nonlithiated electrode materials Prelithiation Graphite Overcharge safety CHARGE/DISCHARGE CHARACTERISTICS BATTERIES CELLS CYCLE Chemistry, Physical Electrochemistry Physics, Condensed Matter
中文摘要	The electrochemical characteristics of the sulfur composite cathode for reversible lithium storage were investigated. The sulfur composites showed novel electrochemical characteristics as well as high specific capacity and good cycleability. The sulfur composite presented the average discharge voltage of 1.9 V, which was just the half of conventional LiCoO2 cathode materials, indicating that the double cells in series presented the same working voltage as conventional LiCoO2 cells and meaning that the sulfur composite cells will have good interchangeability with conventional LiCoO2 cells. The overcharge test showed that the sulfur composite cell cannot be charged over 5.0 V, indicating that the sulfur composite cell presented the intrinsic safety for overcharge. Overcharge can cause serious problems for the conventional Li ion cells. The overcharge test also showed that the sulfur composite cell was destroyed when the cell was charged over 4.0 V, resulting in that the cell cannot normally be discharged again. It is found, however, that the sulfur composite cell can be discharged again at very low current density of a 0.002-C rate after the cell was overcharged. Being much safer than lithium metal anode, the graphite anode was used to fabricate sulfur composite/graphite lithium ion cells with a prelithiated sulfur composite cathode, which was produced by electrochemical lithiation. The charge/discharge and cycling characteristics of the sulfur composite/graphite cell was investigated. The result showed that the sulfur composite/graphite cells can be normally cycled and showed the different voltages from that of the cell with the lithium metal anode. This paves the effective way to fabricate safer sulfur composite/graphite lithium ion cells.
语种	英语 ; 英语
出版者	SPRINGER HEIDELBERG ; HEIDELBERG ; TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79314]
专题	清华大学
推荐引用方式 GB/T 7714	He, Xiangming,Ren, Jianguo,Wang, Li,et al. Electrochemical characteristics of sulfur composite cathode for reversible lithium storage[J],2010, 2010.
APA	He, Xiangming,Ren, Jianguo,Wang, Li,Pu, Weihua,Wan, Chunrong,&Jiang, Changyin.(2010).Electrochemical characteristics of sulfur composite cathode for reversible lithium storage..
MLA	He, Xiangming,et al."Electrochemical characteristics of sulfur composite cathode for reversible lithium storage".(2010).

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