Improving Cycling Stability of the Lithium Anode by a Spin-Coated High-Purity Li(3)PS(4) Artificial SEI Layer - Université de Rennes Accéder directement au contenu
Article Dans Une Revue ACS Applied Materials & Interfaces Année : 2022

Improving Cycling Stability of the Lithium Anode by a Spin-Coated High-Purity Li(3)PS(4) Artificial SEI Layer

Résumé

Controlling the composition and microstructure of the solid electrolyte interphase (SEI) layer is critical to improving the cycling stability of the high-energy-density lithium-metal electrode. It is a quite tricky task to control the properties of the SEI layer which is conventionally formed by the chemical reactions between a Li metal and the additives. Herein, we develop a new route to synthesize a lithium-compatible sol of the sulfide electrolyte Li(3)PS(4), so that a Li(3)PS(4) artificial SEI layer with a controllable nanoscale thickness and high phase purity can be prepared by spin-coating. The layer stabilizes the lithium/electrolyte interface by homogenizing the Li-ion flux, preventing the parasitic reactions, and alleviating concentration polarization. Consequently, a symmetrical cell with the Li(3)PS(4)-modified lithium electrodes can achieve stable lithium plating/stripping for 800 h at a current density of 1 mA cm(-2). The Li-S batteries assembled with the Li(3)PS(4)-protected Li anodes show better capacity retention than their bare Li counterparts, whose average decay rate from the 240th cycle to the 800th cycle is only 0.004%/cycle. In addition, the Li(3)PS(4) layer improves the rate capacity of the batteries, significantly enhancing the capacity from 175 to 682 mA h g(-1) at a 2 C rate. The spin-coated Li(3)PS(4) artificial SEI layer provides a new strategy to develop high-performance Li metal batteries.
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Dates et versions

hal-03632073 , version 1 (11-04-2023)

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Hongjiao Wang, Lilin Wu, Bai Xue, Fang Wang, Zhongkuan Luo, et al.. Improving Cycling Stability of the Lithium Anode by a Spin-Coated High-Purity Li(3)PS(4) Artificial SEI Layer. ACS Applied Materials & Interfaces, 2022, 14 (13), pp.15214-15224. ⟨10.1021/acsami.1c25224⟩. ⟨hal-03632073⟩
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