globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1817286116
论文题名:
Direct electrochemical generation of supercooled sulfur microdroplets well below their melting temperature
作者: Liu N.; Zhou G.; Yang A.; Yu X.; Shi F.; Sun J.; Zhang J.; Liu B.; Wu C.-L.; Tao X.; Sun Y.; Cui Y.; Chu S.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2019
卷: 116, 期:3
起始页码: 765
结束页码: 770
语种: 英语
英文关键词: In situ optical microscopy | ; Li-S batteries ; Liquid sulfur droplets | ; Supercooled liquids | ; | crystallization
Scopus关键词: electrolyte ; lithium ; sulfide ; sulfur ; Article ; chemical phenomena ; cooling ; crystal ; electric current ; electrochemistry ; liquid ; melting point ; melting temperature ; microscopy ; oxidation ; physical chemistry ; priority journal ; room temperature ; solid state
英文摘要: Supercooled liquid sulfur microdroplets were directly generated from polysulfide electrochemical oxidation on various metal-containing electrodes. The sulfur droplets remain liquid at 155 °C below sulfur’s melting point (T m = 115 °C), with fractional supercooling change (T m − T sc )/T m larger than 0.40. In operando light microscopy captured the rapid merging and shape relaxation of sulfur droplets, indicating their liquid nature. Micropatterned electrode and electrochemical current allow precise control of the location and size of supercooled microdroplets, respectively. Using this platform, we initiated and observed the rapid solidification of supercooled sulfur microdroplets upon crystalline sulfur touching, which confirms supercooled sulfur’s metastability at room temperature. In addition, the formation of liquid sulfur in electrochemical cell enriches lithium-sulfur-electrolyte phase diagram and potentially may create new opportunities for high-energy Li-S batteries. © 2019 National Academy of Sciences. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163576
Appears in Collections:气候变化与战略

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作者单位: Liu, N., Department of Physics, Stanford University, Stanford, CA 94305, United States, Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, United States, School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States; Zhou, G., Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, United States; Yang, A., Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, United States; Yu, X., Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, United States; Shi, F., Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, United States; Sun, J., Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, United States; Zhang, J., Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, United States; Liu, B., Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, United States; Wu, C.-L., Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, United States; Tao, X., Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, United States, College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, China; Sun, Y., Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, United States; Cui, Y., Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, United States, SLAC National Accelerator Laboratory, Stanford Institute for Materials and Energy Sciences, Menlo Park, CA 94025, United States; Chu, S., Department of Physics, Stanford University, Stanford, CA 94305, United States, Department of Molecular and Cellular Physiology, Stanford University, Stanford, CA 94305, United States

Recommended Citation:
Liu N.,Zhou G.,Yang A.,et al. Direct electrochemical generation of supercooled sulfur microdroplets well below their melting temperature[J]. Proceedings of the National Academy of Sciences of the United States of America,2019-01-01,116(3)
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