Intrinsically Safe Lithium Metal Batteries Enabled by Thermo-Electrochemical Compatible In Situ Polymerized Solid-State Electrolytes

Shi Jie Yang, Hong Yuan*, Nan Yao, Jiang Kui Hu, Xi Long Wang, Rui Wen, Jia Liu, Jia Qi Huang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

In situ polymerized solid-state electrolytes have attracted much attention due to high Li-ion conductivity, conformal interface contact, and low interface resistance, but are plagued by lithium dendrite, interface degradation, and inferior thermal stability, which thereby leads to limited lifespan and severe safety hazards for high-energy lithium metal batteries (LMBs). Herein, an in situ polymerized electrolyte is proposed by copolymerization of 1,3-dioxolane with 1,3,5-tri glycidyl isocyanurate (TGIC) as a cross-linking agent, which realizes a synergy of battery thermal safety and interface compatibility with Li anode. Functional TGIC enhances the electrolyte polymeric level. The unique carbon-formation mechanism facilitates flame retardancy and eliminates the battery fire risk. In the meantime, TGIC-derived inorganic-rich interphase inhibits interface side reactions and promotes uniform Li plating. Intrinsically safe LMBs with nonflammability and outstanding electrochemical performances under extreme temperatures (130 °C) are achieved. This functional polymer design shows a promising prospect for the development of safe LMBs.

Original languageEnglish
Article number2405086
JournalAdvanced Materials
Volume36
Issue number35
DOIs
Publication statusPublished - 28 Aug 2024

Keywords

  • electrolyte design
  • lithium metal
  • safety
  • solid-state battery
  • thermal runaway

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Yang, S. J., Yuan, H., Yao, N., Hu, J. K., Wang, X. L., Wen, R., Liu, J., & Huang, J. Q. (2024). Intrinsically Safe Lithium Metal Batteries Enabled by Thermo-Electrochemical Compatible In Situ Polymerized Solid-State Electrolytes. Advanced Materials, 36(35), Article 2405086. https://doi.org/10.1002/adma.202405086