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Engineering the Li-ion flux and interfacial chemistry toward a stable Li metal anode via a simple separator coating strategy.
- Source :
-
New Journal of Chemistry . 5/7/2023, Vol. 47 Issue 17, p7986-7994. 9p. - Publication Year :
- 2023
-
Abstract
- Due to its remarkably high specific capacity of 3860 mA h g−1 and low reduction potential (−3.04 V vs. SHE), lithium metal has been identified as an ideal anode candidate for high-energy density lithium-ion cells. However, the growth of lithium dendrites caused by the deposition of lithium metal can affect the charge and discharge behavior of a cell and lead to short circuit, which is a safety concern and hinders its practical applications. Here, we prepare a composite separator polypropylene-Li1+xAlxTi2−x(PO4)3-indium tin oxide (PP–LATP–ITO) via a simple slurry coating method. The coating of LATP-ITO demonstrates unique advantages of Li-ion deposition as well as interfacial chemistry. Firstly, lithiophilic PP-ITO helps to reduce the energy barrier for Li deposition. In addition, the three-dimensional ion channels can regulate the transport of lithium ions and induce uniform Li metal plating and stripping. Furthermore, the in situ formed interface comprising of a Li–In alloy, Li3PO4 and LiF enables stable interfacial chemistry. As a result, compared with the PP separators, the voltage stability of the composite separators in Li–Li symmetric cells is greatly improved during the charge and discharge cycling. In addition, LCO/Li cells with the composite separator PP–LATP–ITO exhibit a higher specific capacity (140 mA h g−1) and good capacity maintenance during cycling. This work proposes a separator coating strategy that can inhibit dendrite formation and stabilize the lithium metal interface. [ABSTRACT FROM AUTHOR]
- Subjects :
- *METALS
*ION channels
*LITHIUM cells
*LITHIUM
*SURFACE coatings
*LITHIUM ions
*ANODES
Subjects
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 47
- Issue :
- 17
- Database :
- Academic Search Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 163461692
- Full Text :
- https://doi.org/10.1039/d3nj01086d