Silicon electrowinning by molten salts electrolysis

Area of Science:

• Materials Science
• Electrochemistry
• Solid-State Chemistry

Background:

• Electrochemical production of silicon (Si) in molten salts is a viable route for fabricating electronic and photovoltaic devices.
• Understanding the factors influencing Si deposit structure and morphology is crucial for optimizing material properties.

Purpose of the Study:

• To review the electrodeposition of silicon (Si) in molten salts.
• To analyze the key parameters affecting Si production via electrolysis in molten salts.

Main Methods:

• Analysis of factors influencing Si deposit structure and morphology.
• Consideration of electrolyte composition, current densities, overpotentials, precursors, temperature, and deposition duration.
• Focus on developing less corrosive, water-soluble electrolytes capable of dissolving Si species.

Main Results:

• Identified critical parameters controlling Si deposit characteristics during molten salt electrodeposition.
• Highlighted the importance of electrolyte properties for efficient Si dissolution and deposition.

Conclusions:

• Electrolysis in molten salts offers a promising method for silicon production.
• Careful control over electrolyte composition and electrochemical parameters is essential for successful Si electrodeposition.