Effect of the Formation Rate on the Stability of Anode-Free Lithium Metal Batteries.

Autor:	Kim S; Department of Engineering, University of Cambridge, Cambridge CB3 0FS, United Kingdom.; School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea., Didwal PN; Department of Materials, University of Oxford, Oxford OX1 3PH, United Kingdom.; The Faraday Institution, Quad One, Harwell Science and Innovation Campus, Didcot OX11 0RA, United Kingdom., Fiates J; Chemistry - School of Natural and Environmental Science, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom.; The Faraday Institution, Quad One, Harwell Science and Innovation Campus, Didcot OX11 0RA, United Kingdom., Dawson JA; Chemistry - School of Natural and Environmental Science, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom.; The Faraday Institution, Quad One, Harwell Science and Innovation Campus, Didcot OX11 0RA, United Kingdom., Weatherup RS; Department of Materials, University of Oxford, Oxford OX1 3PH, United Kingdom.; The Faraday Institution, Quad One, Harwell Science and Innovation Campus, Didcot OX11 0RA, United Kingdom., De Volder M; Department of Engineering, University of Cambridge, Cambridge CB3 0FS, United Kingdom.; The Faraday Institution, Quad One, Harwell Science and Innovation Campus, Didcot OX11 0RA, United Kingdom.
Jazyk:	angličtina
Zdroj:	ACS energy letters [ACS Energy Lett] 2024 Sep 06; Vol. 9 (10), pp. 4753-4760. Date of Electronic Publication: 2024 Sep 06 (Print Publication: 2024).
DOI:	10.1021/acsenergylett.4c02258
Abstrakt:	Anode-free Li-ion batteries (AFBs), where a Cu current collector is used to plate and strip Li instead of a classic anode, are promising technologies to increase the energy density of batteries. In addition, AFBs are safer and easier to manufacture than competing Li-metal anodes and solid-state batteries. However, the loss of Li inventory that occurs during the operation of AFBs limits their lifespan and practical application. In this study, we find that, in particular, the current density used during the formation of AFBs has a considerable impact on the cycling stability of the cell. We optimize the formation protocol based on experimental and computational observations of thresholds associated with morphological changes in the plated Li and the chemical composition of the solid-electrolyte interphase. Unlike graphite anodes, which require slow formation cycles, AFBs exhibit improved cycling behavior when formed at the highest current densities that avoid dendritic Li formation. We verify that this strategy for optimizing the formation current density is effective for three different electrolyte formulations and, therefore, provides a straightforward universal rationale to optimize the formation protocols for AFBs. Competing Interests: The authors declare no competing financial interest. (© 2024 The Authors. Published by American Chemical Society.)
Databáze:	MEDLINE
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