Silicon monoxide (SiO) is one of the most promising anode materials due to its high capacity and improved cycle stability. The lithium silicates (Li_xSiO_y) and lithium oxide (Li₂O) formed during the first lithiation can serve as a buffer matrix to restrain the volume change of internal silicon (Si), however, which also lows the initial coulombic efficiency (ICE). High-silicon silicon suboxide (SiO_x) seems desirable due to the generation of less but enough Li_xSiO_y/Li₂O matrix. However, it is challenging to verify that all Si is protected by the matrix. In this work, SiO_0.4 nanowires with Si shielded by SiO_x are synthesized using thermal plasma. The interwoven structure composites of carbon-coated SiO_0.4 and carbon nanotubes (SiO_0.4/CNTs@C) are then synthesized. As an electrode with a high loading of 2.2 mg cm⁻², SiO_0.4/CNTs@C shows a 12.7 % increase in ICE (81.9 %) and a 34.6 % increase in capacity (1993 mAh/g/4.4 mAh cm⁻² at 0.2 A/g for 300 cycles) in comparison to SiO₁/CNTs@C. SiO_0.4/CNTs@C also shows outstanding high-rate cycle performance (1440 mAh/g at 3.0A/g for 2000 cycles). Significantly, when 5 wt% SiO_0.4/CNTs@C is added as an additive to commercial graphite (Gr), the capacity of a standard LiNi_0.8Co_0.15Al_0.05O₂//Gr 18,650 battery improves by 20.6 %.

一氧化硅 (SiO) 是最有前途的负极材料之一，因为它具有高容量和改善的循环稳定性。在第一次锂化过程中形成的硅酸锂（Li _x SiO _y）和氧化锂（Li ₂ O）可以作为缓冲基质来抑制内部硅（Si）的体积变化，但是，这也降低了初始库仑效率（冰）。高硅低氧化硅 (SiO _x ) 似乎是理想的，因为生成的 Li _x SiO _y /Li ₂ O 矩阵较少但足够。然而，验证所有 Si 是否都受到矩阵的保护具有挑战性。在这项工作中，SiO _{0.4纳米线与 Si 被 SiO x}屏蔽使用热等离子体合成。然后合成了碳包覆的SiO _0.4和碳纳米管（SiO _0.4 /CNTs@C）的交织结构复合材料。作为具有 2.2 mg cm ^-2高负载量的电极，SiO _0.4 /CNTs@C 显示 ICE 增加 12.7% (81.9%) 和容量增加 34.6% (1993 mAh/g/4.4 mAh cm ^-2在0.2 A/g，300 个循环）与 SiO ₁ /CNTs@C 相比。SiO _0.4 /CNTs@C 还表现出出色的高倍率循环性能（1440 mAh/g 在 3.0A/g 下循环 2000 次）。值得注意的是，当将 5 wt% SiO _0.4 /CNTs@C 作为添加剂添加到商业石墨 (Gr) 中时，标准 LiNi _0.8的容量Co _0.15 Al _0.05 O ₂ //Gr 18,650 电池提高了 20.6%。