Passivation of Lithium Metal Anode via Hybrid Ionic Liquid Electrolyte toward Stable Li Plating/Stripping

Nian-Wu Li; Ya-Xia Yin; Jin-Yi Li; Chang-Huan Zhang; Yu-Guo Guo

doi:10.1002/advs.201600400

Passivation of Lithium Metal Anode via Hybrid Ionic Liquid Electrolyte toward Stable Li Plating/Stripping

Adv Sci (Weinh). 2016 Nov 3;4(2):1600400. doi: 10.1002/advs.201600400. eCollection 2017 Feb.

Authors

Nian-Wu Li¹, Ya-Xia Yin², Jin-Yi Li², Chang-Huan Zhang¹, Yu-Guo Guo²

Affiliations

¹ CAS Key Laboratory of Molecular Nanostructure and Nanotechnology Institute of Chemistry Chinese Academy of Sciences (CAS) Beijing 100190 P. R. China.
² CAS Key Laboratory of Molecular Nanostructure and Nanotechnology Institute of Chemistry Chinese Academy of Sciences (CAS) Beijing 100190 P. R. China; School of Chemistry and Chemical Engineering University of Chinese Academy of Sciences Beijing 100049 P. R. China.

Abstract

Hybrid electrolyte of ionic liquid and ethers is used to passivate the surface of Li metal surface via modification of the as-formed solid electrolyte interphase with N-propyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)amide (Py₁₃TFSI), thereby reducing the side reactions between the Li metal and electrolyte, leading to remarkably suppressed Li dendrite growth and mitigating Li metal corrosion.

Keywords: electrochemistry; hybrid electrolyte; ionic liquid; lithium metal; lithium metal batteries.