Understanding the impact of additives on cobalt leaching efficiency using a citric acid-based deep eutectic solvent

Recovery of critical metals such as cobalt from secondary sources is an effective way to reduce the supply risk of metals that are necessary in clean energy technologies, but such recovery processes need to be more benign. Hence, this study presents new insights into leaching cobalt using deep eutec...

Descripción completa

Detalles Bibliográficos
Autores: Perera, Isuri N., Pringle, Jennifer M., O'Dell, Luke A., Siriwardana, Amal, Pozo-Gonzalo, Cristina
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:TECNALIA Research & Innovation
Repositorio:TECNALIA Publications
Idioma:inglés
OAI Identifier:oai:dsp.tecnalia.com:11556/5842
Acceso en línea:https://hdl.handle.net/11556/5842
Access Level:acceso abierto
Palabra clave:Catalysis
General Chemistry
Materials Chemistry
SDG 7 - Affordable and Clean Energy
id ES_ec61222174ecc93d4834eddffdfff8e2
oai_identifier_str oai:dsp.tecnalia.com:11556/5842
network_acronym_str ES
network_name_str España
repository_id_str
spelling Understanding the impact of additives on cobalt leaching efficiency using a citric acid-based deep eutectic solventPerera, Isuri N.Pringle, Jennifer M.O'Dell, Luke A.Siriwardana, AmalPozo-Gonzalo, CristinaCatalysisGeneral ChemistryMaterials ChemistrySDG 7 - Affordable and Clean EnergyRecovery of critical metals such as cobalt from secondary sources is an effective way to reduce the supply risk of metals that are necessary in clean energy technologies, but such recovery processes need to be more benign. Hence, this study presents new insights into leaching cobalt using deep eutectic solvents under mild conditions. The role of ethylene glycol (EG) and water as additives in cobalt leaching was investigated using a mixture containing citric acid (CA):choline chloride (ChCl) in 1 : 1 molar ratio. While the water concentration and Co leaching efficiency were directly related, that was not the case for the EG content. A larger amount of EG in the mixture (CA : ChCl : EG from 1 : 1 : 0.3 to 1 : 1 : 4 molar ratio) decreased the cobalt leaching efficiency, which was attributed to the presence of EG in different coordination forms, as suggested by FTIR spectroscopy. The optimal solvent mixture CA : ChCl : EG (1 : 1 : 1.1) led to leaching efficiencies of 43% cobalt and 65% lithium from lithium cobalt oxide (LiCoO2) at 60 °C for 48 h. Although lithium(i) was the key to increasing the leaching efficiency, we also observed that the presence of lithium(i) in the leachate could negatively impact the electrochemical reduction process. This may be due to the different speciation of cobalt(ii) in the presence and absence of lithium(i), as indicated by NMR spectroscopy.GS20252025-05-1420252025-01-0120252025-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articlehttps://hdl.handle.net/11556/5842reponame:TECNALIA Publicationsinstname:TECNALIA Research & InnovationInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:dsp.tecnalia.com:11556/58422026-06-12T12:42:27Z
dc.title.none.fl_str_mv Understanding the impact of additives on cobalt leaching efficiency using a citric acid-based deep eutectic solvent
title Understanding the impact of additives on cobalt leaching efficiency using a citric acid-based deep eutectic solvent
spellingShingle Understanding the impact of additives on cobalt leaching efficiency using a citric acid-based deep eutectic solvent
Perera, Isuri N.
Catalysis
General Chemistry
Materials Chemistry
SDG 7 - Affordable and Clean Energy
title_short Understanding the impact of additives on cobalt leaching efficiency using a citric acid-based deep eutectic solvent
title_full Understanding the impact of additives on cobalt leaching efficiency using a citric acid-based deep eutectic solvent
title_fullStr Understanding the impact of additives on cobalt leaching efficiency using a citric acid-based deep eutectic solvent
title_full_unstemmed Understanding the impact of additives on cobalt leaching efficiency using a citric acid-based deep eutectic solvent
title_sort Understanding the impact of additives on cobalt leaching efficiency using a citric acid-based deep eutectic solvent
dc.creator.none.fl_str_mv Perera, Isuri N.
Pringle, Jennifer M.
O'Dell, Luke A.
Siriwardana, Amal
Pozo-Gonzalo, Cristina
author Perera, Isuri N.
author_facet Perera, Isuri N.
Pringle, Jennifer M.
O'Dell, Luke A.
Siriwardana, Amal
Pozo-Gonzalo, Cristina
author_role author
author2 Pringle, Jennifer M.
O'Dell, Luke A.
Siriwardana, Amal
Pozo-Gonzalo, Cristina
author2_role author
author
author
author
dc.contributor.none.fl_str_mv GS
dc.subject.none.fl_str_mv Catalysis
General Chemistry
Materials Chemistry
SDG 7 - Affordable and Clean Energy
topic Catalysis
General Chemistry
Materials Chemistry
SDG 7 - Affordable and Clean Energy
description Recovery of critical metals such as cobalt from secondary sources is an effective way to reduce the supply risk of metals that are necessary in clean energy technologies, but such recovery processes need to be more benign. Hence, this study presents new insights into leaching cobalt using deep eutectic solvents under mild conditions. The role of ethylene glycol (EG) and water as additives in cobalt leaching was investigated using a mixture containing citric acid (CA):choline chloride (ChCl) in 1 : 1 molar ratio. While the water concentration and Co leaching efficiency were directly related, that was not the case for the EG content. A larger amount of EG in the mixture (CA : ChCl : EG from 1 : 1 : 0.3 to 1 : 1 : 4 molar ratio) decreased the cobalt leaching efficiency, which was attributed to the presence of EG in different coordination forms, as suggested by FTIR spectroscopy. The optimal solvent mixture CA : ChCl : EG (1 : 1 : 1.1) led to leaching efficiencies of 43% cobalt and 65% lithium from lithium cobalt oxide (LiCoO2) at 60 °C for 48 h. Although lithium(i) was the key to increasing the leaching efficiency, we also observed that the presence of lithium(i) in the leachate could negatively impact the electrochemical reduction process. This may be due to the different speciation of cobalt(ii) in the presence and absence of lithium(i), as indicated by NMR spectroscopy.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025-05-14
2025
2025-01-01
2025
2025-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/11556/5842
url https://hdl.handle.net/11556/5842
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:TECNALIA Publications
instname:TECNALIA Research & Innovation
instname_str TECNALIA Research & Innovation
reponame_str TECNALIA Publications
collection TECNALIA Publications
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869423309795360768
score 15.811543

Similares en LA Referencia