Regulating lithium nucleation and growth by zinc modified current collectors
作者机构：Baker LaboratoryDepartment of Chemistry and Chemical BiologyCornell UniversityIthacaNew York14853USA Department of Chemical and Biological EngineeringKorea University145 Anam-roSeongbuk-guSeoul02841Republic of Korea
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2020年第13卷第1期
页 面：45-51页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
主 题：lithium metal anode lithium dendrite current collector zinc layer
摘 要：Lithium metal is commonly regarded as the“Holy Grailanode material for high energy density rechargeable ***,the uncontrollable growth of Li dendrites has posed safety concerns and thus greatly hindered its large-scale *** we have modified the surface of a commercial anode current collector,Cu foil,with a thin layer of Zn by a facile electroplating method,in order to regulate the Li nucleation and the following growth *** of the formation of a solid solution buffer layer and Li-Zn alloy phases,the Li nucleation overpotential was dramatically reduced,realizing a uniform Li nucleation and a smooth Li plating *** a result,significantly improved long-term cycling performance with a high Coulombic efficiency was achieved by the lithiophilic Zn coated Cu foil as a current *** cells of Li-LiFePO4 and Li-S using the Li deposited on the Zn modified Cu as the anode,showed increased capacity with low voltage hysteresis and greatly enhanced cycling stability,ascribed to the uniform Li deposition and formation of a stable SEI *** work demonstrates the feasibility of employing lithiophilic modified Cu foils as Li metal current collectors for practical applications.
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