气候变化领域集成服务门户(CCPortal): Unique aqueous Li-ion/sulfur chemistry with high energy density and reversibility

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DOI	10.1073/pnas.1703937114
	Unique aqueous Li-ion/sulfur chemistry with high energy density and reversibility
	Yang C.; Suo L.; Borodin O.; Wang F.; Sun W.; Gao T.; Fan X.; Hou S.; Ma Z.; Amine K.; Xu K.; Wang C.
发表日期	2017
ISSN	0027-8424
起始页码	6197
结束页码	6202
卷号	114 期号:24
英文摘要	Leveraging the most recent success in expanding the electrochemical stability window of aqueous electrolytes, in this work we create a unique Li-ion/sulfur chemistry of both high energy density and safety. We show that in the superconcentrated aqueous electrolyte, lithiation of sulfur experiences phase change from a highorder polysulfide to low-order polysulfides through solid-liquid two-phase reaction pathway, where the liquid polysulfide phase in the sulfide electrode is thermodynamically phase-separated from the superconcentrated aqueous electrolyte. The sulfurwith solid-liquid two-phase exhibits a reversible capacity of 1,327 mAh/(g of S), along with fast reaction kinetics and negligible polysulfide dissolution. By coupling a sulfur anode with different Li-ion cathode materials, the aqueous Li-ion/sulfur full cell delivers record-high energy densities up to 200 Wh/(kg of total electrode mass) for >1,000 cycles at ∼100% coulombic efficiency. These performances already approach that of commercial lithium-ion batteries (LIBs) using a nonaqueous electrolyte, along with intrinsic safety not possessed by the latter. The excellent performance of this aqueous battery chemistry significantly promotes the practical possibility of aqueous LIBs in large-format applications.
英文关键词	Aqueous sulfur battery; Gel polymer electrolyte; Phase separation; Rechargeable aqueous battery; Water-in-salt
语种	英语
scopus关键词	electrolyte; lithium ion; sulfur; aqueous solution; Article; chemical reaction kinetics; controlled study; current density; cyclic potentiometry; electric battery; electric potential; electrochemical analysis; energy; lithiation; oxidation reduction reaction; phase separation; priority journal; Raman spectrometry; reaction analysis; thermodynamics
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160629
作者单位	Yang, C., Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD 20740, United States; Suo, L., Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD 20740, United States; Borodin, O., US Army Research Laboratory, Power and Energy Division, Sensor and Electron Devices Electrochemistry Branch, Adelphi, MD 20783, United States; Wang, F., Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD 20740, United States; Sun, W., Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD 20740, United States; Gao, T., Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD 20740, United States; Fan, X., Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD 20740, United States; Hou, S., Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD 2...
推荐引用方式 GB/T 7714	Yang C.,Suo L.,Borodin O.,et al. Unique aqueous Li-ion/sulfur chemistry with high energy density and reversibility[J],2017,114(24).
APA	Yang C..,Suo L..,Borodin O..,Wang F..,Sun W..,...&Wang C..(2017).Unique aqueous Li-ion/sulfur chemistry with high energy density and reversibility.Proceedings of the National Academy of Sciences of the United States of America,114(24).
MLA	Yang C.,et al."Unique aqueous Li-ion/sulfur chemistry with high energy density and reversibility".Proceedings of the National Academy of Sciences of the United States of America 114.24(2017).