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- W4366197105 abstract "Prelithiation as a facile and effective method to compensate the lithium inventory loss in the initial cycle has progressed considerably both on anode and cathode sides. However, much less research has been devoted to the prelithiation effect on the interface stabilization for long-term cycling of Si-based anodes. An in-depth quantitative analysis of the interface that form during the prelithiation of SiO$_x$ is presented here and the results are compared with prelithiaton of Si anodes. Local structure probe combined with detailed electrochemical analysis reveals that a characteristic mosaic interface is formed on both prelithiated SiO$_x$ and Si anodes. This mosaic interface containing multiple lithium silicates phases, is fundamentally different from the solid electrolyte interface (SEI) formed without prelithiation. The ideal conductivity and mechanical properties of lithium silicates enable improved cycling stability of both prelithiated anodes. With a higher ratio of lithium silicates due to the oxygen participation, prelithiated SiO$_{1.3}$ anode improves the initial coulombic efficiency to 94% in full cell and delivers good cycling retention after hundreds cycles under lean electrolyte conditions. The insights provided in this work could be used to further optimize high Si loading based anode in future high energy density batteries." @default.
- W4366197105 created "2023-04-19" @default.
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- W4366197105 date "2023-04-13" @default.
- W4366197105 modified "2023-10-16" @default.
- W4366197105 title "Elucidating the Role of Prelithiation in Si-based Anodes for Interface Stabilization" @default.
- W4366197105 doi "https://doi.org/10.48550/arxiv.2304.06817" @default.
- W4366197105 hasPublicationYear "2023" @default.
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