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DOI	10.1039/c9ee00336c
	Asymmetric allyl-activation of organosulfides for high-energy reversible redox flow batteries
	Weng G.-M.; Yang B.; Liu C.-Y.; Du G.-Y.; Li E.Y.; Lu Y.-C.
发表日期	2019
ISSN	1754-5692
起始页码	2244
结束页码	2252
卷号	12 期号:7
英文摘要	Organosulfides (R-Sn-R) exhibit a high theoretical capacity and low cost, but suffer from sluggish kinetics and poor reversibility. Here, we demonstrate an effective and universal strategy to improve their redox activity by replacing one organic functional group with an allyl (A) to form asymmetric allyl-substituted organosulfides (R-Sn-A). This promotes the cleavage of the A-S bond owing to facile generation of allyl radials, thereby improving the reduction kinetics and capacity. We verified the formation of asymmetric organosulfides by gas-chromatography-mass spectrometry and show that the allyl-activation strategy is universal to a series of functional groups. We successfully increased the discharge potential (up to 280 mV) and discharge capacity (up to 200%) of the organosulfide compared to its symmetric counterpart. A highly-concentrated liquid electrolyte (5 M) with a volumetric capacity of 224 A h L-1 was realized, demonstrating a substantial improvement in volumetric capacity compared to other reported liquid electrolytes to date. This strategy revitalizes organosulfides for high-energy and low-cost energy storage applications. © The Royal Society of Chemistry 2019.
语种	英语
scopus关键词	Chemical activation; Costs; Electrolytes; Gas chromatography; Mass spectrometry; Redox reactions; Concentrated liquids; Discharge capacities; Discharge potential; Gas chromatography-mass spectrometry; Liquid electrolytes; Organic functional groups; Theoretical capacity; Volumetric capacity; Flow batteries; electrolyte; energy storage; equipment; radical; reaction kinetics; spectrometry
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/162836
作者单位	Electrochemical Energy and Interfaces Laboratory, Department of Mechanical and Automation Engineering, Chinese University of Hong Kong, Shatin N. T., 999077, Hong Kong; Department of Chemistry, National Taiwan Normal University, No. 88, Tingchow Road, Taipei, 116, Taiwan
推荐引用方式 GB/T 7714	Weng G.-M.,Yang B.,Liu C.-Y.,et al. Asymmetric allyl-activation of organosulfides for high-energy reversible redox flow batteries[J],2019,12(7).
APA	Weng G.-M.,Yang B.,Liu C.-Y.,Du G.-Y.,Li E.Y.,&Lu Y.-C..(2019).Asymmetric allyl-activation of organosulfides for high-energy reversible redox flow batteries.Energy and Environmental Science,12(7).
MLA	Weng G.-M.,et al."Asymmetric allyl-activation of organosulfides for high-energy reversible redox flow batteries".Energy and Environmental Science 12.7(2019).