气候变化领域集成服务门户(CCPortal): A versatile single-ion electrolyte with a Grotthuss-like Li conduction mechanism for dendrite-free Li metal batteries

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DOI	10.1039/c9ee01473j
	A versatile single-ion electrolyte with a Grotthuss-like Li conduction mechanism for dendrite-free Li metal batteries
	Yuan S.; Bao J.L.; Wei J.; Xia Y.; Truhlar D.G.; Wang Y.
发表日期	2019
ISSN	17545692
起始页码	2741
结束页码	2750
卷号	12 期号:9
英文摘要	Batteries with Li metal anodes have the desirable feature of high energy density; however, the notorious problem of Li dendrite formation has impeded their practical applications. Herein, we present a versatile single-ion electrolyte, which is achieved by a different strategy of coordinating the anions in the electrolyte on the open metal sites of a metal organic framework. Further investigations of the activation energy and theoretical quantum mechanical calculations suggest that Li ion transport inside the pores of Cu-MOF-74 is via a Grotthuss-like mechanism where the charge is transported by coordinated hopping of Li ions between the perchlorate groups. This single-ion electrolyte is versatile and has wide applications. When the single-ion electrolyte is used for Li-Li symmetric cells and Li-LiFePO4 full cells, Li dendrites are suppressed. As a result, an ultralong cycle life is achieved for both cells. In addition, when the single-ion electrolyte is assembled into Li-LiMn2O4 batteries, the dissolution of Mn2+ into the electrolyte is suppressed even at elevated temperatures, and a long cycle life with improved capacity retention is achieved for Li-LiMn2O4 batteries. Finally, when the single-ion electrolyte is applied to Li-O2 batteries, an improved cycle life with reduced overpotential is also achieved. © 2019 The Royal Society of Chemistry.
英文关键词	Activation energy; Binary alloys; Charging (batteries); Crystalline materials; Electrolytes; Inorganic compounds; Ions; Lithium compounds; Lithium-air batteries; Lithium-ion batteries; Manganese compounds; Metals; Organometallics; Quantum chemistry; Quantum theory; Capacity retention; Conduction Mechanism; Dendrite formation; Desirable features; Elevated temperature; High energy densities; Metal organic framework; Quantum-mechanical calculation; Phosphorus compounds; activation energy; dissolution; electrode; electrolyte; lithium; perchlorate; quantum mechanics
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/189820
作者单位	Department of Chemistry, Shanghai Key Laboratory of Catalysis and Innovative Materials, Center of Chemistry for Energy Materials, Fudan University, Shanghai, 200433, China; Department of Chemistry, Chemical Theory Center, Minnesota Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, MN 55455-0431, United States
推荐引用方式 GB/T 7714	Yuan S.,Bao J.L.,Wei J.,et al. A versatile single-ion electrolyte with a Grotthuss-like Li conduction mechanism for dendrite-free Li metal batteries[J],2019,12(9).
APA	Yuan S.,Bao J.L.,Wei J.,Xia Y.,Truhlar D.G.,&Wang Y..(2019).A versatile single-ion electrolyte with a Grotthuss-like Li conduction mechanism for dendrite-free Li metal batteries.Energy & Environmental Science,12(9).
MLA	Yuan S.,et al."A versatile single-ion electrolyte with a Grotthuss-like Li conduction mechanism for dendrite-free Li metal batteries".Energy & Environmental Science 12.9(2019).