Electrodeposition of Si in Molten CaCl2 above 1300K
Electrodeposition of Si in Molten CaCl2 above 1300K
复制标题
1300K以上熔融CaCl2中Si的电沉积
DOI：
10.1149/08614.0029ecst
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Morishige Taiki
中科院分区：
文献类型：
--
作者：
Takenaka Toshihide;Shimokawa Ryoya;Okada Haruka;Morishige Taiki
针对液态金属硅在熔融CaCl_2中的直接电沉积，在1373~ 1573 K进行了金属硅电沉积的尝试。在以CaSiO 3为硅源的熔融CaCl 2中，采用循环伏安法研究了其电化学行为。阴极电流随CaSiO 3加入量的增加而增加，表明镀液中发生了a Si离子的电化学还原。循环伏安测试结果表明，CaSiO 3的溶解度随温度的升高而增大，在1573 K时约为7mol%。采用恒电位电解法得到金属硅。然而，金属Si的总量仍然不足，并且不能控制不期望的反应，例如CaSi 2形成和MoSi 2形成。为了更好地进行电解，应该研究硅酸钙类型对Si沉积的影响。用于金属Si沉积的合适阴极材料也是要考虑的主题。
Aiming at direct electrodeposition of liquid metallic Si in molten CaCl2, electrodeposition of metallic Si has been attempted at 1373~ 1573K. In molten CaCl2 containing CaSiO3 as Si source, the electrochemical behavior was investigated by cyclic voltammetry. Cathodic current increased with the increase in added amount of CaSiO3, which indicates that the electrochemical reduction of a Si ion occurred in the bath. The results by cyclic voltammetry suggest that the solubility of CaSiO3 enlarged with the temperature increase, and was about 7 mol% at 1573 K. Metallic Si was obtained by potentiostatic electrolysis. However, the total amount of metallic Si was still insufficient, and undesirable reactions, such as CaSi2 formation and MoSi2 formation, could not be controlled. To perform better electrolysis, the influence of the type of calcium silicate on Si deposition should be investigated. Suitable cathode material for metallic Si deposition is also a subject to consider.