气候变化领域集成服务门户(CCPortal): Lithium degradation in lithium-sulfur batteries: Insights into inventory depletion and interphasial evolution with cycling

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DOI	10.1039/d0ee01074j
	Lithium degradation in lithium-sulfur batteries: Insights into inventory depletion and interphasial evolution with cycling
	Nanda S.; Manthiram A.
发表日期	2020
ISSN	17545692
起始页码	2501
结束页码	2514
卷号	13 期号:8
英文摘要	The promise of high energy density lithium-sulfur batteries with long cycle life is currently tempered by the rapid degradation of lithium-metal anodes with cycling. An in-depth understanding of the dynamical behavior in liquid electrolytes, including the mechanisms underlying depletion of lithium inventory and evolution of lithium interphases, is crucial to make Li-S batteries a reality. We use here an anode-free full cell configuration, pairing a Li2S cathode with a bare nickel current collector with no lithium metal on it, to quantitatively estimate the lithium inventory loss per cycle. Lithium inventory loss is shown to be the main factor limiting the overall cyclability of Li-S batteries. Time-of-flight secondary ion mass spectrometry measurements on the deposited lithium reveal the presence of substantial metallic lithium even after most of the active lithium inventory has been depleted. The trapped metallic lithium is rendered electrochemically inactive by the growth of a resistive electrolyte decomposition interphase on the lithium surface. The bulk of the deposited lithium is shown to be composed of various fully reduced interphasial components, including several hydrogen-containing species that show a substantial reduction in intensity with cycling. This indicates considerable gas evolution and is also correlated with the loss of lithium inventory. The use of an anode-free full cell configuration provides a framework for accurate assessment of the dynamics of lithium inventory depletion and characterization of the accompanying interphasial evolution with cycling. The insights gained will prove invaluable to the development of strategies for extending the cycle life of energy-dense Li-S batteries. © 2020 The Royal Society of Chemistry.
英文关键词	Anodes; Charging (batteries); Electrolytes; Lithium batteries; Lithium compounds; Metals; Secondary ion mass spectrometry; Sulfur compounds; Dynamical behaviors; Electrolyte decomposition; High energy densities; In-depth understanding; Inventory depletion; Liquid electrolytes; Substantial reduction; Time of flight secondary ion mass spectrometry; Lithium sulfur batteries; decomposition; electrode; electrolyte; fuel cell; hydrogen; lithium; nickel; reduction; sulfur
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189592
作者单位	Materials Science and Engineering Program, Texas Materials Institute, University of Texas at Austin, Austin, TX 78712, United States
推荐引用方式 GB/T 7714	Nanda S.,Manthiram A.. Lithium degradation in lithium-sulfur batteries: Insights into inventory depletion and interphasial evolution with cycling[J],2020,13(8).
APA	Nanda S.,&Manthiram A..(2020).Lithium degradation in lithium-sulfur batteries: Insights into inventory depletion and interphasial evolution with cycling.Energy & Environmental Science,13(8).
MLA	Nanda S.,et al."Lithium degradation in lithium-sulfur batteries: Insights into inventory depletion and interphasial evolution with cycling".Energy & Environmental Science 13.8(2020).