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Uniform lithium nucleation/deposition regulated by N/S co-doped carbon nanospheres towards ultra-stable lithium metal anodes.
- Source :
- Journal of Materials Chemistry A; 1/21/2022, Vol. 10 Issue 3, p1463-1472, 10p
- Publication Year :
- 2022
-
Abstract
- Uncontrollable Li dendrite growth increases the risks of cell short-circuit or even safety accidents, severely hindering the practical application of lithium metal anodes (LMAs). Herein, N/S-co-doped mesoporous carbon (NSMC) nanospheres with ordered mesoporous channels prepared by an in situ polymerization and facile pyrolysis approach are designed and can effectively regulate the Li nucleation/deposition behavior. As a host, NSMC has high affinity towards Li ions owing to the electronegative surface, which provides a low Li nucleation barrier and promotes the subsequent dendrite-free deposition. Moreover, a robust solid electrolyte interphase (SEI) layer is established, synergistically improving the cycling stability, even under high areal capacity. With these advantages, ultra-stable Li@NSMC‖Li@NSMC symmetric cells were achieved with a lifetime of up to 2700 h and 400 h at a high areal capacity of 4 and 20 mA h cm<superscript>−2</superscript>, respectively. Full cells with commercial LiFePO<subscript>4</subscript> cathodes deliver a high reversible capacity of 121 mA h g<superscript>−1</superscript> after 300 cycles at 2C with a retention ratio of 84%, showing great potential in practical applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 10
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 154734659
- Full Text :
- https://doi.org/10.1039/d1ta09575g