The silicon suboxide (SiO) anode material is considered to be a promising anode material of Lithium-ion batteries (LIBs), because of its high theoretical capacity. However, there are severe problems for SiO, including the huge volume change (200%), the low electrical conductivity and the low first Coulombic efficiency. In order to solve those problems, a ternary composite ((SiO_x/G/SnO₂)@C) (G denotes graphite) with carbon coating layer is prepared by ball milling, spray drying and sintering. In the composite, graphite as one part of the active materials, can improve the Coulombic efficiency and control volume change of SiO_x. To further restrain the high-volume change of SiO_x, the carbon coating layer is designed. In particular, owing to the presence of SnO₂, a better electrochemical performance for (SiO_x/G/SnO₂)@C is obtained. The results show that the first charging capacity of (SiO_x/G/SnO₂)@C can reach 382.6 mAh g⁻¹ at current density of 100 mA g⁻¹ and the Coulombic efficiency is improved from 62.2% to 74.9%. After 110 cycles, the charging capacity is 424.6 mAh g⁻¹ and the capacity retention rate is 103.9%. In addition, after 90 cycles of rate performance test, (SiO_x/G/SnO₂)@C exhibited the highest capacity retention of 104.7%.

低氧化硅 (SiO) 负极材料被认为是一种很有前途的锂离子电池 (LIB) 负极材料，因为它具有很高的理论容量。然而，SiO 存在严重的问题，包括巨大的体积变化（200％），低电导率和低第一库仑效率。为了解决这些问题，通过球磨、喷雾干燥和烧结制备了具有碳涂层的三元复合物((SiO _x /G/SnO _{2 )@C)（G表示石墨）。}在复合材料中，石墨作为活性材料的一部分，可以提高库仑效率，控制SiO _x的体积变化。进一步抑制SiO _{x的高体积变化}，设计了碳涂层。特别地，由于SnO _{2的存在，(SiO x} /G/SnO ₂ )@C获得了更好的电化学性能。结果表明，(SiO _x /G/SnO _{2 )@C在100 mA g} ^-1电流密度下的首次充电容量可达382.6 mAh g ^-1，库仑效率从62.2%提高到74.9%。110次循环后，充电容量为424.6 mAh g ^-1，容量保持率为103.9%。此外，经过90次倍率性能测试后，(SiO _x /G/SnO ₂ )@C的容量保持率最高，达到104.7%。