Nano silica aerogel-induced formation of an organic/alloy biphasic interfacial layer enables construction of stable high-energy lithium metal batteries

Chengwei Ma, Xinyu Zhang, Chengcai Liu, Yuanxing Zhang, Yuanshen Wang, Ling Liu, Zhikun Zhao, Borong Wu*, Daobin Mu

*Corresponding author for this work

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Abstract

Lithium metal batteries represent promising candidates for high-energy-density batteries, however, many challenges must still be overcome, e.g., interface instability and dendrite growth. In this work, nano silica aerogel was employed to generate a hybrid film with high lithium ion conductivity (0.6 mS cm−1 at room temperature) via an in situ crosslinking reaction. TOF-SIMS profile analysis has revealed conversion mechanism of hybrid film to Li–Si alloy/LiF biphasic interface layer, suggesting that the Li–Si alloy and LiF-rich interface layer promoted rapid Li+ transport and shielded the Li anodes from corrosive reactions with electrolyte-derived products. When coupled with nickel-cobalt-manganese-based cathodes, the batteries achieve outstanding capacity retention over 1000 cycles at 1 C. Additionally the developed film coated on Li enabled high coulombic efficiency (99.5%) after long-term cycling when coupled with S cathodes. Overall, the results presented herein confirm an effective strategy for the development of high-energy batteries.

Original languageEnglish
Pages (from-to)1071-1080
Number of pages10
JournalGreen Energy and Environment
Volume8
Issue number4
DOIs
Publication statusPublished - Aug 2023

Keywords

  • Biphasic interface layer
  • In situ crosslinking
  • Lithium metal batteries
  • Li–Si alloy
  • Nano silica aerogel

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Ma, C., Zhang, X., Liu, C., Zhang, Y., Wang, Y., Liu, L., Zhao, Z., Wu, B., & Mu, D. (2023). Nano silica aerogel-induced formation of an organic/alloy biphasic interfacial layer enables construction of stable high-energy lithium metal batteries. Green Energy and Environment, 8(4), 1071-1080. https://doi.org/10.1016/j.gee.2021.12.006