Jung Chan-Ok, Park Dong-Wha
Department of Chemical Engineering and Regional Innovation, Center for Environmental Technology of Thermal Plasma (RIC-ETTP), INHA University, 253 Yonghyun-Dong, Nam-Gu, Incheon 402-751, Republic of Korea.
J Nanosci Nanotechnol. 2013 Feb;13(2):1153-8. doi: 10.1166/jnn.2013.6035.
SiO(x) was prepared by DC arc plasma and applied to the anode material of lithium ion batteries. A pellet of a mixture of Si and SiO2 was used as the raw material. The ratios of the silicon and silicon dioxide (SiO2) mixtures were varied by controlling the Si-SiO2 molar ratio (Si-SiO2 = 1-4). Hydrogen gas was used as the reduction atmosphere in the chamber. The prepared SiO(x) was collected on the chamber wall. The obtained SiO(x) was characterized by X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). XRD and TEM showed that the phase composition of the prepared particles was composed of amorphous SiO(x) and crystalline Si. The prepared SiO(x) showed wire and spherical morphology. XPS indicated the bonding state and 'x' value of the prepared SiO(x), which was close to one. The result of prepared SiO(x) is discussed from thermodynamic equilibrium calculations. The electrochemical behavior of the silicon monoxide anode was investigated.
通过直流电弧等离子体制备了SiO(x)，并将其应用于锂离子电池的负极材料。以Si和SiO₂的混合物颗粒作为原材料。通过控制Si-SiO₂摩尔比（Si-SiO₂ = 1-4）来改变硅与二氧化硅（SiO₂）混合物的比例。在反应腔中使用氢气作为还原气氛。制备得到的SiO(x)收集在反应腔壁上。采用X射线衍射（XRD）、场发射扫描电子显微镜（FE-SEM）、能谱仪（EDS）、透射电子显微镜（TEM）和X射线光电子能谱（XPS）对所得的SiO(x)进行了表征。XRD和TEM表明，所制备颗粒的相组成由非晶态SiO(x)和晶体Si构成。所制备的SiO(x)呈现出线状和球形形态。XPS表明了所制备的SiO(x)的键合状态和“x”值，其接近1。从热力学平衡计算的角度对所制备的SiO(x)的结果进行了讨论。研究了一氧化硅负极的电化学行为。
