Insight into the Interfacial Process and Mechanism in Lithium-Sulfur Batteries: An In Situ AFM Study

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	Insight into the Interfacial Process and Mechanism in Lithium-Sulfur Batteries: An In Situ AFM Study
	Lang, Shuang-Yan 1,2,3; Shi, Yang 1,2,3; Guo, Yu-Guo 1,2,3; Wang, Dong 1,2,3; Wen, Rui 1,2; Wan, Li-Jun 1,2,3
刊名	ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
	2016-12-19
卷号	55 期号:51 页码:15835-15839
关键词	Afm Electrochemistry Interfacial Dynamics Li-s Batteries Nanostructures
英文摘要	Lithium-sulfur (Li-S) batteries are highly appealing for large-scale energy storage. However, performance deterioration issues remain, which are highly related to interfacial properties. Herein, we present a direct visualization of the interfacial structure and dynamics of the Li-S discharge/charge processes at the nanoscale. In situ atomic force microscopy and ex situ spectroscopic methods directly distinguish the morphology and growth processes of insoluble products Li2S2 and Li2S. The monitored interfacial dynamics show that Li2S2 nanoparticle nuclei begin to grow at 2V followed by a fast deposition of lamellar Li2S at 1.83V on discharge. Upon charging, only Li2S depletes from the interface, leaving some Li2S2 undissolved, which accumulates during cycling. The galvanostatic precipitation of Li2S2 and/or Li2S is correlated to current rates and affects the specific capacity. These findings reveal a straightforward structure-reactivity correlation and performance fading mechanism in Li-S batteries.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/37993]
专题	化学研究所_分子纳米结构与纳米技术实验室
作者单位	1.Chinese Acad Sci, Key Lab Mol Nanostruct & Nanotechnol, Inst Chem, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci China, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Lang, Shuang-Yan,Shi, Yang,Guo, Yu-Guo,et al. Insight into the Interfacial Process and Mechanism in Lithium-Sulfur Batteries: An In Situ AFM Study[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,2016,55(51):15835-15839.
APA	Lang, Shuang-Yan,Shi, Yang,Guo, Yu-Guo,Wang, Dong,Wen, Rui,&Wan, Li-Jun.(2016).Insight into the Interfacial Process and Mechanism in Lithium-Sulfur Batteries: An In Situ AFM Study.ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,55(51),15835-15839.
MLA	Lang, Shuang-Yan,et al."Insight into the Interfacial Process and Mechanism in Lithium-Sulfur Batteries: An In Situ AFM Study".ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 55.51(2016):15835-15839.