气候变化领域集成服务门户(CCPortal): Quantitative temporally and spatially resolved X-ray fluorescence microprobe characterization of the manganese dissolution-deposition mechanism in aqueous Zn/α-MnO2batteries

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DOI	10.1039/d0ee02168g
	Quantitative temporally and spatially resolved X-ray fluorescence microprobe characterization of the manganese dissolution-deposition mechanism in aqueous Zn/α-MnO2batteries
	Wu D.; Housel L.M.; Kim S.J.; Sadique N.; Quilty C.D.; Wu L.; Tappero R.; Nicholas S.L.; Ehrlich S.; Zhu Y.; Marschilok A.C.; Takeuchi E.S.; Bock D.C.; Takeuchi K.J.
发表日期	2020
ISSN	1754-5692
起始页码	4322
结束页码	4333
卷号	13 期号:11
英文摘要	Rechargeable aqueous Zn/α-MnO2 batteries are a possible alternative to lithium ion batteries for scalable stationary energy storage applications due to their low cost, safety and environmentally benign components. A critical need for advancement of this battery system is a full understanding of the electrochemical reaction mechanisms, which remain unclear. In this report, operando, spatiotemporal resolved synchrotron X-ray fluorescence mapping measurements on a custom aqueous Zn/α-MnO2 cell provided direct evidence of a Mn dissolution-deposition faradaic mechanism that governs the electrochemistry. Simultaneous visualization and quantification of the Mn distribution in the electrolyte revealed the formation of aqueous Mn species during discharge and depletion on charge. The findings are supported by ex situ transmission electron microscopy (TEM), X-ray diffraction, Mn K-edge X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) measurements. The elucidated mechanism is fundamentally different from the previously proposed Zn2+ insertion or conversion reactions. These findings provide a foundation for developing dissolution-deposition chemistries suitable for scalable stationary energy storage with aqueous electrolyte. © The Royal Society of Chemistry.
语种	英语
scopus关键词	Absorption spectra; Deposition; Dissolution; Electrolytes; Energy storage; Extended X ray absorption fine structure spectroscopy; Fluorescence; High resolution transmission electron microscopy; Lithium-ion batteries; X ray absorption; X ray absorption near edge structure spectroscopy; Deposition chemistry; Electrochemical reactions; Environmentally benign; Extended X-ray absorption fine structure measurements; Manganese dissolution; Stationary energy storages; Synchrotron x-ray fluorescences; X-ray absorption near-edge structure; Manganese metallography; absorption; dissolution; electrolyte; energy storage; lithium; mapping method; spatiotemporal analysis; X-ray fluorescence
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162846
作者单位	Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY 11794, United States; Energy and Photon Sciences, Brookhaven National Laboratory, Upton, NY 11973, United States; Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York, 11973, United States; Department of Chemistry, Stony Brook University, Stony Brook, NY 11794, United States; National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, United States; Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794, United States
推荐引用方式 GB/T 7714	Wu D.,Housel L.M.,Kim S.J.,et al. Quantitative temporally and spatially resolved X-ray fluorescence microprobe characterization of the manganese dissolution-deposition mechanism in aqueous Zn/α-MnO2batteries[J],2020,13(11).
APA	Wu D..,Housel L.M..,Kim S.J..,Sadique N..,Quilty C.D..,...&Takeuchi K.J..(2020).Quantitative temporally and spatially resolved X-ray fluorescence microprobe characterization of the manganese dissolution-deposition mechanism in aqueous Zn/α-MnO2batteries.Energy and Environmental Science,13(11).
MLA	Wu D.,et al."Quantitative temporally and spatially resolved X-ray fluorescence microprobe characterization of the manganese dissolution-deposition mechanism in aqueous Zn/α-MnO2batteries".Energy and Environmental Science 13.11(2020).