Enhanced and evenly-distributed Li+ transport in well-aligned nanochannels enables stable lithium metal anode

Kai HUANG, Pengbo ZHAI, Jun Song CHEN, Jing XIAO, Yongji GONG, Xiaokun ZHANG*, Xiaoli PENG, Yong XIANG

*Corresponding author for this work

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

2 Citations (Scopus)

Abstract

The high theoretical capacity of lithium (Li) has sparkled its intensive research as the anode for Li batteries. However, the dendritic growth due to the uneven Li deposition causes premature cell failure and dramatically restricts the application of Li anode. Herein, inspired by the pore sizes effects of anodized aluminum oxide (AAO) membranes on Li+ transport performance, 20 nm aperture membrane (AAO-20) with enhanced Li+ transport can achieve higher Li+ concentration near the deposition substrate, possibly preventing rapid Li+ depletion compared to other aperture sizes. Subsequently, smaller Li nucleation overpotential and larger exchange current density in AAO-20 reveal the enhanced kinetics at deposition interface, which is derived from the enhanced Li+ transport in nanochannels, leading to a superior Li deposition. With AAO-20 which can stabilize Li anode, Li-Cu, Li-Li, and Li-LiFePO4 cells demonstrate high Coulombic efficiency, superior cycling stability, and excellent capacity retention, respectively. Such findings can be helpful for the development of high-energy Li metal batteries.

Original languageEnglish
Article number107395
Number of pages8
JournalElectrochemistry Communications
Volume144-145
DOIs
Publication statusPublished - Nov 2022
Externally publishedYes

Bibliographical note

This work was performed at School of Materials and Energy, University of Electronic Science and Technology of China, and it was supported partly by the National Natural Science Foundation of China (Grant No. 21905040) and the startup funds from the University of Electronic Science and Technology of China. K. Huang thanks Dr. J. Cao from Sichuan University for providing valuable suggestions.

Keywords

  • Cycle stability
  • Enhanced Li transport
  • Li deposition behavior
  • Li metal anode
  • Pore sizes effects

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