Electrodeposition of Silicon at Temperatures above Its Melting Point

Abstract

The electrowinning of molten silicon has been achieved for the first time using a melt. The silicon formed roughly spherical or ellipsoidal droplets up to 15 mm in diameter in the small experimental system used, and these solidified with a grain size of up to 1 mm. Material of 99.97% purity can be produced from 99.5% pure starting material without additional purification or pre‐electrolysis.