Research progresses on modified current collector for lithium metal anode

doi:10.19799/j.cnki.2095-4239.2021.0082

Abstract

Abstract:

Because of the ultra-high theoretical capacity density (3680 mA·h·g^-1) and the low reduction potential (-3.04 V versus the standard hydrogen electrode), metallic Li is considered the "Holy Grail" anode material for high energy density battery systems. However, a series of problems such as low Coulombic efficiency, short cycle life, and internal short circuits caused by Li dendritic growth and high reactivity toward electrolytes hinder the practical utilization of Li metal anodes. In a practical electrochemical system, the current collector is the substrate for the plating and stripping of Li. Therefore, its surface properties play a vital role on the cyclic stability of the Li metal anode. In this study, multiple strategies of surface modification and microstructure design on current collectors to stabilize Li metal anodes are systematically summarized, including the fabrication of lithophilic surfaces, the modification of nanoscale electronic/ionic hybrid conductive networks, and the design of surface microstructures. Targeted interface/structure modifications of the current collector can effectively regulate the electrodeposition of Li and promote the practical application of Li metal anodes in high energy density battery systems.

Key words: current collector, lithium metal anode, lithophilic surface, lithium dendrites, surface microstructure

CLC Number:

TQ 028.8

Yangyang LIU, Xuyang WANG, Xieyu XU, Yongjing WANG, Shizhao XIONG, Zhongxiao SONG. Research progresses on modified current collector for lithium metal anode[J]. Energy Storage Science and Technology, 2021, 10(4): 1261-1272.

Figures/Tables 2

References 79

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