Silicon monoxide composite negative electrode material and preparation method thereof

The invention provides a silicon monoxide composite negative electrode material and a preparation method thereof. The silicon monoxide composite negative electrode material comprises silicon monoxide, Si-B alloy, a conductive carbon layer and a carbon coating layer. The silicon monoxide composite negative electrode material is relatively high in first coulombic efficiency and relatively large in specific capacity, and the electrical property of the negative electrode material can be improved. 本申请提供一种氧化亚硅复合负极材料及其制备方法。上述的氧化亚硅复合负极材料包括氧化亚硅、Si-B合金、导电碳层及碳包覆层。上述的氧化亚硅复合负极材料首次库伦效率较高、比容量较大以及能够提升负极材料电学性能。