ESPEN OLSEN, SVERRE ROLSETH
Silicon for solar cell purposes is produced via an energy-intensive process that exhibits high irreversible thermodynamic losses. This study aims to explore the potential for producing high purity silicon (99,999999 ppx or 9N) while addressing the challenge posed by boron, which shows a higher affinity for specific transition metals than silicon. By combining electrochemical refining with electrolytic reduction-precipitation of transition metal borides, we investigate the formation of such compounds at the cathode-electrolyte interface during electrochemical refining. Laboratory-scale experiments reveal key trends and mechanisms that suggest industrial production of high purity silicon may be feasible. The electrochemical refining process indicates effective removal of elements, particularly demonstrating a low concentration of iron in the purified cathode silicon. The results show promise for reducing thermodynamic losses while achieving desired silicon purity levels necessary for photovoltaic applications.
@article{24f356f7-6b6e-4c0d-aadf-8f397a9bf527,
title={Electrocatalytic Formation and Inactivat},
author={ESPEN OLSEN and SVERRE ROLSETH},
year={2026},
language={en}
}TY - JOUR TI - Electrocatalytic Formation and Inactivat AU - ESPEN OLSEN AU - SVERRE ROLSETH PY - 2026 LA - en ER -
Alain Vignes
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