High-capacity silicon anode materials have attracted significant attention for application in lithium-ion batteries (LIBs), even though the drastic volumetric changes of the silicon materials result in rapid capacity degradation. Here, an Si-embedded silicon oxycarbide (SiOC) was synthesized using a selective assembly-based method. We utilized cetrimonium bromide (CTAB), a cationic surfactant, to facilitate interfacial interactions between Si nanoparticles and silicone oil using the hydrophobic property of the CTAB tail groups. The synthesis method includes a simple pyrolysis process at 900 °C followed by the surface modification of Si nanoparticles with the CTAB surfactant to obtain a SiOC matrix with homogeneously embedded Si particles. The final composite exhibits improved electrochemical properties as a LIB anode material and displays a stable cycle life (1312 mAh·g^-1 for the 100^th cycle at 0.5 A·g^-1) in addition to enhanced power characteristics (634 mAh·g^-1 at the high current density of 5 A·g^-1). The SiOC matrix effectively suppressed the volumetric change of the inner Si particles in addition to enhancing the conductivity due to the free carbon in SiOC materials.

尽管硅材料体积的急剧变化会导致容量快速下降，但高容量硅阳极材料已引起了锂离子电池（LIB）应用的广泛关注。在此，使用基于选择性组装的方法合成了硅嵌入的碳氧化硅（SiOC）。我们利用阳离子表面活性剂溴化西曲铵（CTAB），利用CTAB尾基的疏水性，促进Si纳米粒子与硅油之间的界面相互作用。合成方法包括在900°C的简单热解过程，然后用CTAB表面活性剂对Si纳米颗粒进行表面改性，从而获得具有均匀包埋的Si颗粒的SiOC基质。^-1用于100^次循环，在0.5 A·克^-1除），以增强的功率特性（634毫安·克^-1在5 A的高电流密度·克^-1）。除了由于SiOC材料中的自由碳而提高电导率之外，SiOC基体还有效地抑制了内部Si颗粒的体积变化。