Silicon’s potential as a lithium-ion battery (LIB) anode is hindered by the reactivity of the lithium silicide (Li_xSi) interface. This study introduces an innovative approach by alloying silicon with boron, creating boron/silicon (BSi) nanoparticles synthesized via plasma-enhanced chemical vapor deposition. These nanoparticles exhibit altered electronic structures as evidenced by optical, structural, and chemical analysis. Integrated into LIB anodes, BSi demonstrates outstanding cycle stability, surpassing 1000 lithiation and delithiation cycles with minimal capacity fade or impedance growth. Detailed electrochemical and microscopic characterization reveal very little SEI growth through 1000 cycles, which suggests that electrolyte degradation is virtually nonexistent. This unconventional strategy offers a promising avenue for high-performance LIB anodes with the potential for rapid scale-up, marking a significant advancement in silicon anode technology.

中文翻译：

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硼硅合金纳米粒子作为锂离子电池阳极有前途的新材料

硅作为锂离子电池（LIB）阳极的潜力受到硅化锂（Li _x Si）界面的反应性的阻碍。这项研究引入了一种创新方法，将硅与硼合金化，通过等离子体增强化学气相沉积合成硼/硅（BSi）纳米颗粒。光学、结构和化学分析证明，这些纳米颗粒表现出改变的电子结构。集成到 LIB 阳极中，BSi 表现出出色的循环稳定性，超过 1000 次锂化和脱锂循环，且容量衰减或阻抗增长最小。详细的电化学和微观表征表明，经过 1000 次循环，SEI 增长非常少，这表明电解质降解实际上不存在。这种非常规策略为高性能锂离子电池阳极提供了一条有前途的途径，具有快速扩大规模的潜力，标志着硅阳极技术的重大进步。