Heteroatomic SenS8-n Molecules Confined in Nitrogen-Doped Mesoporous Carbons as Reversible Cathode Materials for High-Performance Lithium Batteries

CORC > 上海硅酸盐研究所 > 中国科学院上海硅酸盐研究所 > 高性能陶瓷和超微结构国家重点实验室 > 期刊论文

	Heteroatomic SenS8-n Molecules Confined in Nitrogen-Doped Mesoporous Carbons as Reversible Cathode Materials for High-Performance Lithium Batteries
	Sun, Fugen 1; Cheng, Hongye 2; Chen, Jianzhuang 1; Zheng, Nan 1; Li, Yongsheng 1; Shi, Jianlin 1,3
刊名	ACS NANO
	2016-09-01
卷号	10 期号:9 页码:8289-8298
关键词	heteroatomic SenS8-n molecules nitrogen-doped mesoporous carbons selenium-sulfur-carbon composites mixed chalcogen cathodes lithium batteries
英文摘要	A reversible cathode material in an ether-based electrolyte for high-energy lithium batteries was successfully fabricated by homogeneously confining heteroatomic SenS8-n molecules into nitrogen-doped mesoporous carbons (NMCs) via a facile melt impregnation route. The resultant SenS8-n/NMC composites exhibit highly reversible electrochemical behavior, where selenium sulfides are recovered through the reversible conversion of polysulfoselenide intermediates during discharge charge cycles. The recovery of selenium sulfide molecules endows the SenS8-n/NMC cathodes with the rational integration of S and Se cathodes. Density functional theory calculations further reveal that heteroatomic selenium sulfide molecules with higher polarizability could bind more strongly with NMCs than homoatomic sulfur molecules, which provides more efficient suppression of the shuttling phenomenon. Therefore, with further assistance of mesopore confinement of the nitrogen-doped carbons, the Se2S6/NMC composite with an optimal Se/S mole ratio of 2/6 presents excellent cycle stability with a high initial Coulombic efficiency of 96.5% and a high reversible capacity of 883 mAh g(-1) after 100 cycles and 780 mAh g(-1) after 200 cycles at 250 mA g(-1). These encouraging results suggest that the heteroatomization of chalcogen (such as S, Se, or Te) molecules in mesostructured carbon hosts is a promising strategy in enhancing the electrochemical performances of chalcogen/carbon-based cathodes for Li batteries.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
研究领域[WOS]	Chemistry ; Science & Technology - Other Topics ; Materials Science
关键词[WOS]	LI-S BATTERIES ; SULFUR BATTERIES ; SELENIUM BATTERIES ; RING MOLECULES ; EFFICIENT ; ELECTROLYTES ; COMPOSITES ; GLASSES ; STORAGE
收录类别	SCI
语种	英语
WOS记录号	WOS:000384399300020
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/22006]
专题	上海硅酸盐研究所_高性能陶瓷和超微结构国家重点实验室_期刊论文
作者单位	1.East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Lab Low Dimens Mat Chem,Minist Educ, Shanghai 200237, Peoples R China 2.East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
推荐引用方式 GB/T 7714	Sun, Fugen,Cheng, Hongye,Chen, Jianzhuang,et al. Heteroatomic SenS8-n Molecules Confined in Nitrogen-Doped Mesoporous Carbons as Reversible Cathode Materials for High-Performance Lithium Batteries[J]. ACS NANO,2016,10(9):8289-8298.
APA	Sun, Fugen,Cheng, Hongye,Chen, Jianzhuang,Zheng, Nan,Li, Yongsheng,&Shi, Jianlin.(2016).Heteroatomic SenS8-n Molecules Confined in Nitrogen-Doped Mesoporous Carbons as Reversible Cathode Materials for High-Performance Lithium Batteries.ACS NANO,10(9),8289-8298.
MLA	Sun, Fugen,et al."Heteroatomic SenS8-n Molecules Confined in Nitrogen-Doped Mesoporous Carbons as Reversible Cathode Materials for High-Performance Lithium Batteries".ACS NANO 10.9(2016):8289-8298.