Suppressing Li voids in all-solid-state lithium metal batteries through Li diffusion regulation

Zi Xuan Wang, Yang Lu, Chen Zi Zhao*, Wen Ze Huang, Xue Yan Huang, Wei Jin Kong, Ling Xuan Li, Zi You Wang, Hong Yuan*, Jia Qi Huang, Qiang Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The application of all-solid-state lithium metal batteries (ASSLMBs) is hampered by the dynamic deterioration of solid-solid contacts. Anodic degradation is primarily attributed to the accumulation of lithium (Li) voids due to the limited Li diffusion abilities of the anodes. Here, a ternary composite Li anode is introduced by comprising carbon materials embedded within the Li-magnesium substrate. This design effectively suppresses the Li void-induced dynamic deterioration of interfacial contact during continuous cycling. The enhanced Li diffusion pathway with accelerated diffusion rate in bulk anode aids in maintaining contact post-Li stripping, therefore mitigating interface damage caused by Li void formation. The ternary composite anode affords an areal capacity of 14.2 mAh cm−2 with Li utilization rate of 85%. Cooperated with LiNi0.6Co0.2Mn0.2O2 (NCM622) cathodes, the full cells exhibit long-term stability of >300 cycles under room temperature. These findings provide an effective strategy to construct conformal interfaces for high-capacity and long-life ASSLMBs.

Original languageEnglish
Pages (from-to)2794-2810
Number of pages17
JournalJoule
Volume8
Issue number10
DOIs
Publication statusPublished - 16 Oct 2024

Keywords

  • all-solid-state lithium metal batteries
  • lithium diffusion
  • lithium voids
  • ternary composite anode

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Wang, Z. X., Lu, Y., Zhao, C. Z., Huang, W. Z., Huang, X. Y., Kong, W. J., Li, L. X., Wang, Z. Y., Yuan, H., Huang, J. Q., & Zhang, Q. (2024). Suppressing Li voids in all-solid-state lithium metal batteries through Li diffusion regulation. Joule, 8(10), 2794-2810. https://doi.org/10.1016/j.joule.2024.07.007