Silicon monoxide (SiO) is regarded as a highly promising anode material for lithium-ion batteries (LIBS). However, the application of SiO is constrained by poor initial coulombic efficiency (ICE) and low conductivity. To address these issues, we have prepared SiO with uniform carbon coating via in situ polymerization method, then obtained prelithiated SiO@C by facile solid-phase reaction with lithium hydride (p-SiO@C). The dense and homogeneous carbon layer can not only promote the conductivity, but also control the rate of prelithiation reaction. Consequently, the p-SiO@C anode exhibited a high ICE of 85.1% and displays excellent cycling properties. Furthermore, the full cell using NCM811 cathode and p-SiO@C anode shows a high capacity retention of 77.0% after 100 cycles at 0.5 C.

中文翻译：

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通过原位聚合策略实现锂离子电池的高性能预锂化 SiO/C 负极


一氧化硅 （SiO） 被认为是一种非常有前途的锂离子电池 （LIBS） 负极材料。然而，SiO 的应用受到初始库仑效率 （ICE） 差和电导率低的限制。为了解决这些问题，我们通过原位聚合法制备了具有均匀碳涂层的 SiO，然后通过与氢化锂 （p-SiO@C） 的简单固相反应获得预锂化SiO@C。致密均匀的碳层不仅可以促进导电性，还可以控制预锂化反应的速率。因此，p-SiO@C 负极表现出 85.1% 的高 ICE，并表现出优异的循环性能。此外，使用 NCM811 阴极和 p-SiO@C 阳极的全电池在 0.5 C 下循环 100 次后显示出 77.0% 的高容量保持率。