A tin-plated copper substrate for efficient cycling of lithium metal in an anode-free rechargeable lithium battery

被引：128

作者：

Zhang, Sheng S. ^{[1
]}

Fan, Xiulin ^{[2
]}

Wang, Chunsheng ^{[2
]}

机构：

[1] US Army Res Lab, Electrochem Branch, RDRL SED C, Sensors & Elect Devices Directorate, Adelphi, MD 20783 USA

[2] Univ Maryland, Dept Chem & Biomol Engn, College Pk, MD 20742 USA

来源：

ELECTROCHIMICA ACTA | 2017年 / 258卷

关键词：

Lithium battery; Electroless tin plating; Li-Sn alloy; Li plating; Coulombic efficiency; HIGH-AREAL-CAPACITY; ELECTROLYTE; NUCLEATION; DEPOSITION;

D O I：

10.1016/j.electacta.2017.11.175

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Adhesion of Li plating to electrode substrate and chemical stability of plated Li against electrolyte components are two essential factors affecting the cycling performance of Li metal in a rechargeable Li battery. Poor adhesion results in high contact resistance and further the formation of dead Li. Aiming to improve the adhesion of Li plating to Cu substrate, we plate a very thin tin layer as the primer for Li plating on the Cu substrate. By this way, Li metal is first reacted with tin to form a Li-Sn alloy, and then Li is cycled on resultant Li-Sn alloy so that the Li-Sn alloy functions as an "electric glue" to electrically connect the Li plating and Cu substrate. Attributed to the strong affinity between Li and Li-Sn alloy, the pre-plated tin layer is shown not only to enhance the adhesion of the plated Li to electrode substrate but also to improve the morphology of Li plating. Using a 1.0 m (molality) LiPF6 1: 4 (wt.) fluoroethylene carbonate/ethylmethyl carbonate electrolyte, in this paper the effect of the tin primer layer on the Li cycling performance in a Li/Cu cell and a Cu/LiNi0.85Co0.10Al0.05O2 cell is demonstrated and discussed. Published by Elsevier Ltd.

引用

页码：1201 / 1207

页数：7

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