Abstract In this work, SiOx coatings with different crystallinity are successfully prepared on the surface of the silicon (Si) particles by dry oxidation and wet oxidation. The SiOx coatings formed by low-temperature dry oxidation are not only continuous and uniform, but also have the low crystallinity. Theoretically, the continuous, uniform and low-crystallinity SiOx coating is more advantageous for lithium-ion transport and structural stability during the alloying/de-alloying. As a result, the 550 °C sample shows the best electrochemical performance. For example, the 550 °C sample has the highest specific discharge capacity at 2C than other samples. As the rate is restored to 0.1 C, the 550 °C sample also exhibits faster recovery of capacity. Besides, the discharge specific capacity of the 550 °C sample is up to 1108 mAh g−1 after 100 cycles at 0.5 C, showing the best cycle stability.

中文翻译：

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SiOx包覆结晶度对锂离子电池Si@SiOx负极材料电化学性能的影响

摘要 本工作通过干氧化和湿氧化在硅（Si）颗粒表面成功制备了不同结晶度的SiOx涂层。低温干法氧化形成的SiOx涂层不仅连续均匀，而且结晶度低。理论上，连续、均匀和低结晶度的 SiOx 涂层更有利于合金化/去合金化过程中的锂离子传输和结构稳定性。因此，550 °C 的样品显示出最好的电化学性能。例如，550 °C 的样品在 2C 时比其他样品具有最高的放电比容量。随着速率恢复到 0.1 C，550 °C 的样品也表现出更快的容量恢复。除了，