Bismuth-Contained Lithiophilic Protective Layer on Lithium Metal Anode In Situ Generated via Electrochemical Method

Yulong Shao, Yinping Qin, Yingying Song, Kaiyun Xu, Hefeng Wang, Cai Shen, Riming Chen, Yingchun Lyu, Yang Liu, Bingkun Guo

Research output: Journal PublicationArticlepeer-review

Abstract

Lithium metal anode (LMA) faces the challenge of poor electrochemical performances in the exfoliation of the interfacial protective layer from the anode, which is caused by the dramatic volumetric variation of the lithium metal during cycling. In this work, a bismuth-contained lithiophilic protective layer was spontaneously formed on the Li metal by the Bi(TFSI)3 salt additive. The protective layer formed via electrochemical way is relatively dense and homogeneous with a small size of ∼38 nm Li3Bi alloy and abundant LiF. This layer shows excellent property of uniform lithium deposition and displays enough mechanical strength with the Young's modulus of ∼6 GPa to suppress Li dendrite growth and reduces the interfacial side reactions. Utilized in LiFePO4/Li cells, the cyclic performance has been improved with the retention capacity of ∼70.6% in 300 cycles.

Original languageEnglish
Pages (from-to)11493-11500
Number of pages8
JournalACS Sustainable Chemistry and Engineering
Volume10
Issue number35
DOIs
Publication statusPublished - 5 Sep 2022

Keywords

  • Bi(TFSI)
  • electrolyte additive
  • fluoride-rich
  • Li metal
  • Protective layer

ASJC Scopus subject areas

  • Chemistry (all)
  • Environmental Chemistry
  • Chemical Engineering (all)
  • Renewable Energy, Sustainability and the Environment

Fingerprint

Dive into the research topics of 'Bismuth-Contained Lithiophilic Protective Layer on Lithium Metal Anode In Situ Generated via Electrochemical Method'. Together they form a unique fingerprint.

Cite this