Lithiophilic Mo3N2/MoN as multifunctional interlayer for dendrite-free and ultra-stable lithium metal batteries

Xiaojuan Zhang, Yuanfu Chen, Katam Srinivas, Bo Yu, Fei Ma, Bin Wang, Xinqiang Wang, Jiarui He, Zheng Long Xu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

The formation of lithium dendrite and the unstable electrode/electrolyte interface, especially at high rates, are the dominant obstacles impeding the implementation of lithium metal batteries (LMBs). To tackle these fundamental challenges, here we propose a lithiophilic Mo3N2/MoN heterostructure (designated as MoNx) interlayer for dendrite-free and ultra-stable lithium metal anodes for the first time. The MoNx interlayer presents excellent electrolyte wettability, fast lithium diffusion kinetics and strong mechanical strength, which function synergistically to inhibit lithium dendrite growth. During cycling, an in-situ formation of Li3N-rich solid electrolyte interphase layer and metallic Mo phase can regulate the Li-ion conductivity and Li metal deposition, thus indicating uniform and compact Li plating. Above ameliorating features accompany an ultra-long-life of 2000 h at a high current density of 5 mA cm−2 for the MoNx-Li anode. The feasibility of the MoNx-Li anode in LMB is further confirmed in conjunction with LiFePO4 cathodes. The full cells deliver exceptionally high-capacity retentions of above 82.0% after 500 cycles at 1C and 425 cycles at 3C, which are among the best thus far reported for LMBs. This work provides both new insights towards functional interlayer design and effective transition-metal nitrides for practical LMBs.

Original languageEnglish
Pages (from-to)332-341
Number of pages10
JournalJournal of Colloid and Interface Science
Volume612
DOIs
Publication statusPublished - 15 Apr 2022

Keywords

  • DFT calculations
  • In-situ reaction
  • LiN-rich layer
  • Lithium metal batteries
  • MoN/MoN heterostructure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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