Cobalt Deposition from Ionothermally Dissolved Cobalt Oxides

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

Abstract

Owing to the environmental problems of numerous metal production processes, there is a growing need for more energy-efficient approaches. Cobalt is considered a strategic element that is extracted not only from ores but also from spent Li-ion batteries. One promising new approach is ionometallurgy, which is the extraction of metal oxides by ionic liquids (ILs). This study concerns new investigations into ionometallurgical processing of CoO, Co3O4, and LiCoO2 in the IL betainium bis(trifluoromethylsulfonyl)imide, [Hbet][NTf2]. Three crystal structures of cobalt−betaine complex compounds and combined spectroscopic and diffraction studies provide insights into the dissolution process. In addition, an optimized dissolution procedure for metal oxides is presented, avoiding the previously reported decomposition of the IL. Subsequent cobalt electrodeposition is only possible from cationic complex species, highlighting the importance of a thorough understanding of the complex equilibria. The presented method is also compared to other recently reported approaches.

Details

OriginalspracheEnglisch
Aufsatznummere202300090
FachzeitschriftChemSusChem
Jahrgang16
Ausgabenummer9
PublikationsstatusVeröffentlicht - 5 Mai 2023
Peer-Review-StatusJa

Externe IDs

ORCID /0000-0002-2391-6025/work/159171961

Schlagworte

Schlagwörter

  • cobalt, coordination compounds, electrodeposition, ionic liquids, recycling