The objective of this work was to study the electrodeposition of silicon in molten KF-LiF (eut)-K2SiF6 (5 mol%) on Ag and Si substrates at 550oC and 800oC. In addition electrochemical studies of the system were performed on silver, tungsten and glassy carbon substrates at 800oC. The electrochemical measurements confirmed that the reduction of Si is diffusion controlled and occurs in two steps. On silver, dense, coherent films with good adhesion and no inclusions of salt were obtained at 800oC at the growth rate 52 µm/hour. On silicon, the microstructure seemed to consist of small "randomly" oriented crystals. At 550oC, the deposit became porous and powderish both on silver and silicon substrates. The low temperature combined with the relatively high current densities applied was believed to hinder crystal growth.
The electroreduction processes on a Mo electrode in a Na-Zn liquid metal battery cell with a molten NaCl-CaCl2-ZnCl2 electrolyte were investigated at 565 °C. The effect of the battery operating parameters on the loss rate of Na was determined by using electrochemical techniques. The results indicated that the chemical reaction of the reduced Ca and Na with ZnCl2 takes place very quickly, and the electroreduction of Na. Volatilization is mainly responsible for the loss of Na, and a high current density during charging led to the severe competitive deposition of Zn with Na.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.