Improving the Durability of Lithium-Metal Anode via in situ Constructed Multilayer SEI

Yinping Qin, Deyu Wang, Meng Liu, Cai Shen, Yibo Hu, Yang Liu, Bingkun Guo

Research output: Journal PublicationArticlepeer-review

5 Citations (Scopus)

Abstract

In this work, a novel multilayer solid electrolyte interphase (SEI) is demonstrated to prolong the durability of a lithium-metal anode. It is in situ generated via reducing lithium bis(oxalate) borate (LiBOB) and fluoroethylene carbonate (FEC) in the electrolyte containing them as additives. The as-obtained SEI could be roughly divided into three layers: the polycarbonates surface membrane, LiF-rich middle layer, and B-containing polymer bottom film corresponding to their sequentially reductive potentials of 0.8, 1.55, and 1.8 V vs Li+/Li, respectively. This special structure prolongs the durability of lithium-metal anode since the elastic bottom layer could buffer the influence of volumetric variation and the LiF-rich middle layer could suppress Li dendrite growth and electrolyte permeation. Benefiting from the protection of this multilayer SEI, LiNi0.88Co0.09Al0.03O2/Li batteries with ultrahigh cathode loading of ∼4.5 mAh cm-2 stably operate for 200 cycles with the accumulated capacity of 750 mAh cm-2 and the coulombic efficiency of 99.78%. This approach provides a simple and efficient strategy to hover lithium-metal anode.

Original languageEnglish
Pages (from-to)49445-49452
Number of pages8
JournalACS applied materials & interfaces
Volume13
Issue number41
DOIs
Publication statusPublished - 20 Oct 2021
Externally publishedYes

Keywords

  • FEC
  • Li-metal batteries
  • LiBOB
  • SEI
  • multilayer

ASJC Scopus subject areas

  • Materials Science (all)

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