A novel integrated cell with O^2-|YSZ|Pt|O₂(air) reference and counter electrodes was constructed using a short yttria-stabilized zirconia solid electrolyte (YSZ) tube. Combining with cyclic voltammetry and potentiostatic electrolysis methods, green electrochemical preparation of Si from solid SiO₂ in CaCl₂ melt at 1173 K was studied via an experimental apparatus containing the novel integrated cell under completely carbon-free conditions; the effect of electrolysis time on the morphology of the Si product was also investigated by scanning electron microscopy with energy dispersive x-ray spectroscopy (SEM-EDS). The results show that the morphology of the product obtained from potentiostatic electrolysis at a low overpotential (− 1.6 V) undergoes an evolution from SiO₂ raw powder with different sizes to aggregates of spherical particles and small particles with partial reduction, and then to Si nuclei, and finally to Si wires or flakes. The morphology of electrolytic products has little relation with that of SiO₂ raw powder and may be controlled by applying different potentials. Furthermore, the longer the electrolysis time, the more the Si wires grow, and the higher the Si purity overall. It is feasible that the experimental apparatus without the sealed stainless steel reactor and any carbonaceous materials can be used to prepare Si from solid SiO₂ in CaCl₂ melt and release O₂ gas at the same time.

使用短的氧化钇稳定的氧化锆固体电解质（YSZ）管，构建了具有O ^2- | YSZ | Pt | O ₂（空气）参比电极和对电极的新型集成电池。结合循环伏安法和恒电位电解法，由固体SiO ₂在CaCl _2中绿色电化学制备硅通过包含新型集成电池的实验装置，在完全无碳的条件下研究了1173 K时的熔体。还通过扫描电子显微镜和能量色散X射线光谱法（SEM-EDS）研究了电解时间对Si产物形貌的影响。结果表明，在低超电势（-1.6 V）下通过恒电位电解获得的产物的形态发生了变化，从尺寸不同的SiO ₂原始粉末演变为球形颗粒的聚集体和部分还原的小颗粒，然后变成了Si核。 ，最后是硅丝或薄片。电解产物的形态与SiO ₂的形态几乎没有关系粗粉，可以通过施加不同的电势来控制。此外，电解时间越长，Si线的生长越多，并且总体上Si纯度越高。可行的是，可以使用没有密封不锈钢反应器和任何含碳材料的实验设备，由CaCl ₂熔体中的固体SiO ₂制备Si，同时释放O ₂气体。