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Tailoring solvation chemistry by hydrogen bonds in carbonate electrolytes for highly stable lithium-metal batteries.
- Source :
- Journal of Materials Chemistry A; 7/14/2024, Vol. 12 Issue 26, p15685-15692, 8p
- Publication Year :
- 2024
-
Abstract
- The application of carbonate electrolytes in lithium-metal batteries (LMBs) has been impeded by low Coulombic efficiency, Li dendrite growth, and an unstable solid electrolyte interphase (SEI). Herein, a facile method is proposed to tailor solvation chemistry in carbonate electrolytes via hydrogen bonds for highly stable LMBs. The inexpensive and eco-friendly urea is used as an additive to promote LiNO<subscript>3</subscript> dissolution and inhibit HF generation in LiPF<subscript>6</subscript>-based carbonate electrolytes. LiNO<subscript>3</subscript> facilitates the formation of an N-enriched stable SEI and suppresses the Li dendrite growth, hence improving the compatibility of carbonate electrolytes with Li-metal anodes. The suppression effect on HF generation significantly improves the stability of Ni-rich LiNi<subscript>0.8</subscript>Co<subscript>0.1</subscript>Mn<subscript>0.1</subscript>O<subscript>2</subscript> at both room and elevated temperatures. Benefiting from urea and LiNO<subscript>3</subscript>, the designed electrolyte enables a 4.25 V Li‖NCM811 (50 μm thin Li-metal anode and 1.7 mA h cm<superscript>−2</superscript>) cell to exhibit excellent cycling stability over 480 cycles with a capacity retention of 70.8% at 0.5C. This work introduces an efficient approach to simultaneously improve the stability of Li-metal anodes, NCM811 cathodes, and LiPF<subscript>6</subscript>-based carbonate electrolytes, opening a new avenue for advanced electrolyte design. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 12
- Issue :
- 26
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 178207166
- Full Text :
- https://doi.org/10.1039/d4ta01535e