Polysulfide Stabilization: A Pivotal Strategy to Achieve High Energy Density Li-S Batteries with Long Cycle Life

doi:10.1002/adfm.201704987

	Polysulfide Stabilization: A Pivotal Strategy to Achieve High Energy Density Li-S Batteries with Long Cycle Life
	Chen, Yuqing 2,3; Zhang, Hongzhang 1,2; Xu, Wenbin 2; Yang, Xiaofei 1,2,3; Yu, Ying 2,3; Li, Xianfeng 2; Zhang, Huamin 1,2
刊名	ADVANCED FUNCTIONAL MATERIALS
	2018-02-21
卷号	28 期号:8
关键词	Complexing Agent High Energy Density Hsab Theory Li-s Battery Polysulfide Stabilization
ISSN号	1616-301X
DOI	10.1002/adfm.201704987
文献子类	Article
英文摘要	The disproportionation of polysulfide (PS) is a long-neglected and vital issue that causes the fast capacity fading of Li-S batteries. Based on the hard and soft acids and bases (HSAB) theory, a large size N-methyl-N-ethyl pyrrolidinium (MEP+) cation is proposed to complex and stabilize the PS in electrolyte. The disproportionation of PS is successfully suppressed by this simple method, thereby avoiding the precipitation of sulfur in the electrolyte and reducing the loss of the active materials. The mutual interaction mechanism between MEP+ and S-n(2-) in electrolyte is comprehensively investigated and verified for the first time, via both density functional theory (DFT) calculation and experimental characterization. It enables the 5000 mA h Li-S batteries (soft package type) to achieve initial specific energy over 300 Wh kg(-1) and maintain over 65% after 100 charge/discharge cycles at 1/20 C, while merely 24% is remained at 59 cycles without MEP+. This interesting finding is believed to shed light on the further development of Li-S batteries.
WOS关键词	LITHIUM-SULFUR BATTERIES ; SOLID-ELECTROLYTE INTERPHASE ; LIQUID ELECTROLYTE ; IONIC LIQUID ; STORAGE DEVICES ; DISULFIDE BOND ; SOFT ACIDS ; PERFORMANCE ; DISCHARGE ; SEPARATOR
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000425448200007
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/168858]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Zhang, Hongzhang; Zhang, Huamin
作者单位	1.Collaborat Innovat Ctr Chem Energy Mat iChEM, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Zhongshan Rd 457, Dalian 116023, Peoples R China 3.Univ Chinese Acad Sci, Sch Chem Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Chen, Yuqing,Zhang, Hongzhang,Xu, Wenbin,et al. Polysulfide Stabilization: A Pivotal Strategy to Achieve High Energy Density Li-S Batteries with Long Cycle Life[J]. ADVANCED FUNCTIONAL MATERIALS,2018,28(8).
APA	Chen, Yuqing.,Zhang, Hongzhang.,Xu, Wenbin.,Yang, Xiaofei.,Yu, Ying.,...&Zhang, Huamin.(2018).Polysulfide Stabilization: A Pivotal Strategy to Achieve High Energy Density Li-S Batteries with Long Cycle Life.ADVANCED FUNCTIONAL MATERIALS,28(8).
MLA	Chen, Yuqing,et al."Polysulfide Stabilization: A Pivotal Strategy to Achieve High Energy Density Li-S Batteries with Long Cycle Life".ADVANCED FUNCTIONAL MATERIALS 28.8(2018).