Inter-layer-calated Thin Li Metal Electrode with Improved Battery Capacity Retention and Dendrite Suppression

Xi CHEN, Mingwei SHANG, Junjie NIU*

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

71 Citations (Scopus)

Abstract

An inter-layer-calated thin Li metal (ILC-Li) electrode using nondelaminated 2D Ti 3C 2T x MXene stacks (15 μm) coated on a thin Li host (30 μm) was developed. The excellent electrical conductivity and expanded interlayer space of the MXene provide a fast e -/Li + transport while the layer limits the Li growth along the perpendicular direction, thus largely mitigating the dendrite growth. The highly reversible Li deposition/extraction greatly reduces the dead lithium and electrolyte consumption by forming a thin solid-electrolyte-interphase (SEI) layer. A small overpotential of less than 135 mV in symmetric cells was achieved after >1050 cycles at 10 mA cm -2 and 10 mAh cm -2. In a full cell, the battery exhibited an improved capacity retention when compared with Li foil, particularly with lean electrolyte of 2.5 μL mAh -1, thus leading to a high energy density up to 366.6 Wh/kg. The current approach is manufacture scalable, which displays promising potentials in lithium ion batteries.

Original languageEnglish
Pages (from-to)2639-2646
Number of pages8
JournalNano Letters
Volume20
Issue number4
Early online date17 Mar 2020
DOIs
Publication statusPublished - 8 Apr 2020
Externally publishedYes

Bibliographical note

Publisher Copyright:
Copyright © 2020 American Chemical Society.

Funding

All authors acknowledge the support from the Research Growth Initiative (RGI) and UW System Applied Research Grant Program (ARG).

Keywords

  • Dendrite
  • Li metal electrode
  • Lithium ion batteries
  • MXene

Fingerprint

Dive into the research topics of 'Inter-layer-calated Thin Li Metal Electrode with Improved Battery Capacity Retention and Dendrite Suppression'. Together they form a unique fingerprint.

Cite this