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- W4281561903 abstract "Protective surface coatings on Si anodes are promising for improving the electrochemical performance of lithium-ion batteries (LIBs). Nevertheless, most coating materials have severe issues, including low initial coulombic efficiency, structural fracture, morphology control, and complicated synthetic processing. In this study, a multifunctional TiO2-x /TiO1-y Ny (TTN) formed via a facile and scalable synthetic process is applied as a coating material for Si anodes. A thin layer of amorphous TiO2 is uniformly coated onto Si nanoparticles by a simple sol-gel method and then converted into a two phase TiO2-x /TiO1-y Ny via nitridation. The lithiated TiO2-x provides high ionic and electrical conductivity, while TiO1-y Ny can improve mechanical strength that alleviates volume change of Si to address capacity fading issue. Owing to these synergetic advantages, TiO2-x /TiO1-y Ny -coated Si (Si@TTN) exhibits excellent electrochemical properties, including a high charge capacity of 1650 mA h g-1 at 0.1 A g-1 and 84% capacity retention after 100 cycles at 1 A g-1 . Moreover, a significantly enhanced rate performance can be achieved at a high current density. This investigation presents a facile and effective coating material to use as the high-capacity silicon anode in the emerging Si anode technology in LIBs." @default.
- W4281561903 created "2022-05-27" @default.
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- W4281561903 date "2022-05-26" @default.
- W4281561903 modified "2023-09-28" @default.
- W4281561903 title "A Novel High‐Performance TiO <sub>2‐x</sub> /TiO <sub>1‐y</sub> N <sub>y</sub> Coating Material for Silicon Anode in Lithium‐Ion Batteries" @default.
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- W4281561903 doi "https://doi.org/10.1002/smtd.202200430" @default.
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