Journal
ACS ENERGY LETTERS
Volume 7, Issue 4, Pages 1558-1565Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.2c00535
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Funding
- NSF Future Manufacturing Program [CMMI-2037026]
- National Science Foundation Graduate Research Fellowship [DGE1842165]
- U.S. Department of Commerce, National Institute of Standards and Technology as part of the Center for Hierarchical Materials Design (CHiMaD) [70NANB19H005]
- Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF) [ECCS-1542205, NSF DMR-1720139]
- State of Illinois
- Materials Research Science and Engineering Center [NSF DMR-1720139]
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This study introduces a blade-coatable hexagonal boron nitride ionogel electrolyte with high ionic conductivity and stability, enabling excellent rate performance in lithium metal batteries.
Solid-state electrolytes have attracted significant attentionfor rechargeable lithium-ion batteries due to their potential to enablehigher energy density technologies and improve cell safety by removingvolatile liquid electrolytes. However, existing solid-state electrolytematerials lack sufficient electrochemical performance or requireexpensive and time-consuming processing methods that have preventedtheir wide-scale adoption. Here, a blade-coatable hexagonal boronnitride ionogel electrolyte is introduced that exhibits high roomtemperature ionic conductivity (>1 mS cm-1), is stable against lithiummetal anodes, and can be applied over a wide area in a thin (<40 mu m)and crack-freefilm. Furthermore, this blade-coatable slurry has a tunableviscosity to enable its use in existing battery manufacturing infra-structure. The resulting blade-coated hBN ionogel electrolyte isemployed in a lithium metal battery with a LiFePO4cathode, exhibiting superlative rate capability at room temperaturewith a 78% capacity retention after 500 cycles at a rate of 1C.
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