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In-situ construction of hybrid artificial SEI with fluorinated siloxane to enable dendrite-free Li metal anodes
- Source :
- Journal of Materiomics, Vol 9, Iss 2, Pp 318-327 (2023)
- Publication Year :
- 2023
- Publisher :
- Elsevier, 2023.
-
Abstract
- Lithium (Li) metal anode holds great promise for high-energy-density rechargeable batteries. However, it suffers from the Li dendrites growth and uncontrollable side reactions with electrolyte due to the unstable solid electrolyte interphase (SEI) layer. Herein, we propose a facile strategy for the in-situ fabricate of organic-inorganic composite artificial SEI layers on Li surfaces, which consist of organic fluorinated siloxane and inorganic LiF-rich phases. The hybrid artificial SEI endows high mechanical strength (13.1 GPa) and Li+ transfer number (0.62). Such robust SEI protective layers can not only guide uniform nucleation and deposition of Li metal by facilitating uniform Li-ion distribution, but also prevent unfavourable side reactions. Accordingly, the protected metallic lithium anode (PMTFPS-Li) anode enables stable Li plating/stripping performance in symmetric cells for more than 300 h at 4 mA ·h/cm2 under a high areal capacity of 4 mA/cm2. Moreover, the PMTFPS-Li/S cells could maintain more than 300 stable cycles at 0.5C and the PMTFPS-Li/LFP cells present excellent cycling performance (400 cycles at 1C) and enhanced rate capability (110.4 mA·h/g at 3 C). This work will inspire the design of artificial SEI on Li anodes for advanced Li metal batteries.
Details
- Language :
- English
- ISSN :
- 23528478
- Volume :
- 9
- Issue :
- 2
- Database :
- Directory of Open Access Journals
- Journal :
- Journal of Materiomics
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.0cdd8ceba80466cafb0c2e9bf9af3f2
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.jmat.2022.09.018