Blade-Coatable Hexagonal Boron Nitride Ionogel Electrolytes for Scalable Production of Lithium Metal Batteries

Cory M. Thomas, Woo Jin Hyun, Hsien Cheng Huang, Davy Zeng, Mark C. Hersam*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


Solid-state electrolytes have attracted significant attention for rechargeable lithium-ion batteries due to their potential to enable higher energy density technologies and improve cell safety by removing volatile liquid electrolytes. However, existing solid-state electrolyte materials lack sufficient electrochemical performance or require expensive and time-consuming processing methods that have prevented their wide-scale adoption. Here, a blade-coatable hexagonal boron nitride ionogel electrolyte is introduced that exhibits high room temperature ionic conductivity (>1 mS cm-1), is stable against lithium metal anodes, and can be applied over a wide area in a thin (<40 μm) and crack-free film. Furthermore, this blade-coatable slurry has a tunable viscosity to enable its use in existing battery manufacturing infrastructure. The resulting blade-coated hBN ionogel electrolyte is employed in a lithium metal battery with a LiFePO4 cathode, exhibiting superlative rate capability at room temperature with a 78% capacity retention after 500 cycles at a rate of 1C.

Original languageEnglish (US)
Pages (from-to)1558-1565
Number of pages8
JournalACS Energy Letters
Issue number4
StatePublished - Apr 8 2022

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry


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