AUTHOR=Zuo Zefu , Zhuang Libin , Xu Jinzhuo , Shi Yumeng , Su Chenliang , Lian Peichao , Tian Bingbing 

TITLE=Lithiophilic Silver Coating on Lithium Metal Surface for Inhibiting Lithium Dendrites

JOURNAL=Frontiers in Chemistry

VOLUME=8

YEAR=2020

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2020.00109

DOI=10.3389/fchem.2020.00109

ISSN=2296-2646

ABSTRACT=<p>Li metal batteries (LMBs) are known as the ideal energy storage candidates for the future rechargeable batteries due to the high energy density. However, uncontrolled Li dendrites growing during charge/discharge process causes extremely low coulombic efficiency and short lifespan. In this work, a thin lithiophilic layer of Ag was coated on the bare Li surface via a thermal evaporation method, which alleviated volume variations and suppressed Li dendrites growth during cycling. As a result, a long lifespan of 250 h at a current density of 1 mA cm<sup>−2</sup> was achieved in the symmetric cell when using the Ag-modified Li foil (Ag@Li). The LiFePO<sub>4</sub>|Li full cell demonstrated an excellent cycling performance with a high specific capacity of 131 mAh g<sup>−1</sup> even after 300 cycles at 0.5 C. This study offers a suitable method for stabilizing Li metal anodes in LMBs.</p>