Molecular-Layer-Deposited Zincone Films Induce the Formation of LiF-Rich Interphase for Lithium Metal Anodes

Shaozhong Chang, Jiabin Fang, Kai Liu, Zihan Shen, Lin Zhu, Xin Jin, Xuejin Zhang, Chaoquan Hu, Huigang Zhang*, Ai-dong Li*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

14 Citations (Scopus)

Abstract

Lithium metal anodes suffer from low Coulombic efficiency and dendritic growth owing to an unstable solid electrolyte interphase (SEI), which limit the practical applications of lithium metal anodes. Here, zincone (ZnHQ) is conformally fabricated on 3D copper nanowires (CuNWs) via a molecular layer deposition (MLD) technology. Upon polarization, the terminal oxygen of ZnHQ serves as a strong nucleophilic agent to attack Li bis(trifluoromethanesulfonyl)imide, yielding a LiF-rich SEI. This SEI facilitates the Li transport, shuts off the electron conduction, and inhibits the growth of lithium dendrites. In addition, the zinc atoms of ZnHQ induce favorable Li deposition owing to their lithiophilicity. These advantages enabled by MLD make the ZnHQ-modified CuNW (CuNW@ZnHQ) an ideal Li metal anode, which demonstrates excellent cyclability. A symmetrical cell of CuNW@ZnHQ shows high cycling stability for more than 7000 h at the current density of 1 mA cm−2. When pairing with a Ni/Co/Mn ternary oxide cathode (NCM523), the resultant CuNW@ZnHQ||NCM full cell is cycled for 1000 cycles with a 90% capacity retention at an areal capacity of 3.2 mAh cm−2. The MLD technology brings new opportunities for next-generation high-energy Li metal batteries.

Original languageEnglish
Article number2204002
JournalAdvanced Energy Materials
Volume13
Issue number12
Early online dateJan 2023
DOIs
Publication statusPublished - 24 Mar 2023

Scopus Subject Areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

User-Defined Keywords

  • electrolyte degradation
  • lithium fluoride
  • lithium metal anodes
  • molecular layer deposition
  • zincone

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