Abstract Carbon-coated SiO2 nanoparticles (SiO2@C NPs) as a promising anode for lithium-ion batteries have been reported to further improve lithium-storage performance and possess more outstanding electrochemical performance. However, it is still a challenge to fabricate SiO2@C NPs using a facile, rapid and efficient strategy. In this work, SiO2@C NPs on a gram scale are produced by a facile and one-pot gaseous detonation method in 3–5 ms without any post-treatment using benzoic acid (BA) and silicon tetrachloride (ST) as the carbon and silicon sources respectively as well as hydrogen and oxygen as explosion sources. The results indicate that the molar ratio of BA and ST plays a crucial role in the formation of SiO2@C NPs. The as-prepared SiO2@C NPs with an average size of 83.5 nm are quasi-spherical and possess obvious core-shell structure. Additionally, on the basis of our experimental results and the characteristics of gaseous detonation, we speculate the formation mechanism of SiO2@C NPs.

中文翻译：

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碳包覆SiO2纳米粒子的一锅毫秒制备

摘要 据报道，碳包覆的 SiO2 纳米粒子（SiO2@C NPs）作为一种有前途的锂离子电池负极，可进一步提高锂存储性能并具有更出色的电化学性能。然而，使用简便、快速和高效的策略制造 SiO2@C NPs 仍然是一个挑战。在这项工作中，使用苯甲酸 (BA) 和四氯化硅 (ST) 作为碳和四氯化硅 (ST)，通过简便的一锅气态爆炸法在 3-5 ms 内生产克级 SiO2@C NPs，无需任何后处理。分别为硅源以及氢和氧作为爆炸源。结果表明，BA 和 ST 的摩尔比在 SiO2@C NPs 的形成中起着至关重要的作用。所制备的平均尺寸为 83.5 nm 的 SiO2@C NPs 呈准球形，具有明显的核壳结构。