Open AccessSilicon electrodeposition from chloride-fluoride melts containing K2SiF6 and SiO2
Author(s) -
С. И. Жук,
V. A. Isaev,
Olga V. Grishenkova,
А. В. Исаков,
Alexey Apisarov,
Yurii P. Zaykov
Publication year - 2016
Publication title -
journal of the serbian chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.227
H-Index - 45
eISSN - 1820-7421
pISSN - 0352-5139
DOI - 10.2298/jsc160712109z
Subject(s) - electrolysis , silicon , fluoride , cyclic voltammetry , chloride , materials science , cathode , inorganic chemistry , carbon fibers , metallurgy , chemical engineering , chemistry , electrochemistry , electrode , composite material , composite number , engineering , electrolyte
Silicon electrodeposition on glassy carbon from the KF-KCl-K2SiF6, KF-KCl-K2SiF6-KOH and KF-KCl-K2SiF6-SiO2 melts was studied by the cyclic voltammetry. Тhe electroreduction of Si(IV) to metallic Si was observed as a single 4-electron wave under all considered conditions. The reactions of cathode reduction of silicon from fluoride and oxyfluoride complexes were suggested. It was shown that the process can be controlled by the preliminary transformation of SiO44- to SiF62- and SiOxFyz-. The influence of the current density on structure and morphology of silicon deposits obtained during galvanostatic electrolysis of the KF-KCl-K2SiF6-SiO2 melt was studied
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