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DOI	10.1039/d0ee01578d
	Self-discharge of magnesium-sulfur batteries leads to active material loss and poor shelf life
	Ford H.O.; Doyle E.S.; He P.; Boggess W.C.; Oliver A.G.; Wu T.; Sterbinsky G.E.; Schaefer J.L.
发表日期	2021
ISSN	17545692
起始页码	890
结束页码	899
卷号	14 期号:2
英文摘要	Due to its high theoretical energy density and relative abundancy of active materials, the magnesium-sulfur battery has attracted research attention in recent years. A closely related system, the lithium-sulfur battery, can suffer from serious self-discharge behavior. Until now, the self-discharge of Mg-S has been rarely addressed. Herein, we demonstrate for a wide variety of Mg-S electrolytes and conditions that Mg-S batteries also suffer from serious self-discharge. For a common Mg-S electrolyte, we identify a multi-step self-discharge pathway. Covalent S8 diffuses to the metal Mg anode and is converted to ionic Mg polysulfide in a non-faradaic reaction. Mg polysulfides in solution are found to be meta-stable, continuing to react and precipitate as solid magnesium polysulfide species during both storage and active use. Mg-S electrolytes from the early, middle, and state-of-the-art stages of the Mg-S literature are all found to enable the self-discharge. The self-discharge behavior is found to decrease first cycle discharge capacity by at least 32%, and in some cases up to 96%, indicating this is a phenomenon of the Mg-S chemistry that deserves focused attention. © The Royal Society of Chemistry.
英文关键词	Electrolytes; Lithium batteries; Lithium sulfur batteries; Polysulfides; Sulfur compounds; Active material; Discharge capacities; Energy density; Faradaic reactions; Related systems; Self-discharges; Solid magnesium; State of the art; Magnesium compounds; chemistry; detection method; electrolyte; equipment; magnesium; polymer; precipitation (chemistry); 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/190787
作者单位	Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, United States; Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, United States; X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, United States
推荐引用方式 GB/T 7714	Ford H.O.,Doyle E.S.,He P.,et al. Self-discharge of magnesium-sulfur batteries leads to active material loss and poor shelf life[J],2021,14(2).
APA	Ford H.O..,Doyle E.S..,He P..,Boggess W.C..,Oliver A.G..,...&Schaefer J.L..(2021).Self-discharge of magnesium-sulfur batteries leads to active material loss and poor shelf life.Energy & Environmental Science,14(2).
MLA	Ford H.O.,et al."Self-discharge of magnesium-sulfur batteries leads to active material loss and poor shelf life".Energy & Environmental Science 14.2(2021).