On the PF6− anion intercalation in graphite from sodium salt-based electrolytes containing different mixtures of organic carbonates

The intercalation of PF6− anions in graphite from various sodium salt-based electrolytes with organic carbonate mixtures as solvents is investigated. The purpose was to optimize the electrochemical performance of the graphite as cathode in terms of specific capacity, capacity stability, and coulombi...

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Autores: Cameán Martínez, Ignacio, Cuesta Pedrayes, Nuria, García Suárez, Ana Beatriz
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2021
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/260872
Acceso en línea:http://hdl.handle.net/10261/260872
https://api.elsevier.com/content/abstract/scopus_id/85104730325
Access Level:acceso abierto
Palabra clave:Cathode
Graphite
Organic carbonate solvents
Sodium dual-ion batteries
Sodium salt-based electrolytes
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spelling On the PF6− anion intercalation in graphite from sodium salt-based electrolytes containing different mixtures of organic carbonatesCameán Martínez, IgnacioCuesta Pedrayes, NuriaGarcía Suárez, Ana BeatrizCathodeGraphiteOrganic carbonate solventsSodium dual-ion batteriesSodium salt-based electrolytesThe intercalation of PF6− anions in graphite from various sodium salt-based electrolytes with organic carbonate mixtures as solvents is investigated. The purpose was to optimize the electrochemical performance of the graphite as cathode in terms of specific capacity, capacity stability, and coulombic efficiency to be coupled in the future with a hard carbon-based anode in a full sodium dual-ion battery. To this end, a detailed study was made of the influence of applied current density, upper cut-off voltage (UCOV), and electrolyte—in terms of both salt concentration and solvent mixture—on the intercalation/de-intercalation of PF6− anions in the graphite cathode. Low (37.2 mA g−1) and high (372.0 mA g−1) currents, UCOVs from 4.8 to 5.2 V, electrolytes with NaPF6 salt concentrations in the range of 0.2–1.2M and EC:DEC, EC:DMC and EC:EMC solvent mixtures were studied. The best graphite cathode performance was attained in 1.2MNaPF6/EC:EMC electrolyte at the highest current density of 372.0 mA g−1 and for the potential range between 2.9 and 5.0 V vs. Na/Na+. In these conditions, a discharge capacity of 79 mAh g−1 after 1000 cycles with a coulombic efficiency of 99 % and a remarkable capacity retention throughout cycling were determined.Financial support from the Spanish Ministry of Science, Innovation and Universities (Project RTI2018-094286-A-I00) and Asturias Regional Government (GRUPIN 2018, IDI/2018/000234) is gratefully acknowledged. I. Cameán thanks the funding from Fundación General CSIC (Programa ComFuturo, II Edition) to develop the work.Peer reviewedElsevierMinisterio de Ciencia, Innovación y Universidades (España)Cameán Martínez, Ignacio [0000-0003-4014-0385]García Suárez, Ana Beatriz [0000-0003-0935-334X]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202220222021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/260872https://api.elsevier.com/content/abstract/scopus_id/85104730325reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-094286-A-I00Electrochimica Actahttps://doi.org/10.1016/j.electacta.2021.138360Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2608722026-05-22T06:33:51Z
dc.title.none.fl_str_mv On the PF6− anion intercalation in graphite from sodium salt-based electrolytes containing different mixtures of organic carbonates
title On the PF6− anion intercalation in graphite from sodium salt-based electrolytes containing different mixtures of organic carbonates
spellingShingle On the PF6− anion intercalation in graphite from sodium salt-based electrolytes containing different mixtures of organic carbonates
Cameán Martínez, Ignacio
Cathode
Graphite
Organic carbonate solvents
Sodium dual-ion batteries
Sodium salt-based electrolytes
title_short On the PF6− anion intercalation in graphite from sodium salt-based electrolytes containing different mixtures of organic carbonates
title_full On the PF6− anion intercalation in graphite from sodium salt-based electrolytes containing different mixtures of organic carbonates
title_fullStr On the PF6− anion intercalation in graphite from sodium salt-based electrolytes containing different mixtures of organic carbonates
title_full_unstemmed On the PF6− anion intercalation in graphite from sodium salt-based electrolytes containing different mixtures of organic carbonates
title_sort On the PF6− anion intercalation in graphite from sodium salt-based electrolytes containing different mixtures of organic carbonates
dc.creator.none.fl_str_mv Cameán Martínez, Ignacio
Cuesta Pedrayes, Nuria
García Suárez, Ana Beatriz
author Cameán Martínez, Ignacio
author_facet Cameán Martínez, Ignacio
Cuesta Pedrayes, Nuria
García Suárez, Ana Beatriz
author_role author
author2 Cuesta Pedrayes, Nuria
García Suárez, Ana Beatriz
author2_role author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia, Innovación y Universidades (España)
Cameán Martínez, Ignacio [0000-0003-4014-0385]
García Suárez, Ana Beatriz [0000-0003-0935-334X]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Cathode
Graphite
Organic carbonate solvents
Sodium dual-ion batteries
Sodium salt-based electrolytes
topic Cathode
Graphite
Organic carbonate solvents
Sodium dual-ion batteries
Sodium salt-based electrolytes
description The intercalation of PF6− anions in graphite from various sodium salt-based electrolytes with organic carbonate mixtures as solvents is investigated. The purpose was to optimize the electrochemical performance of the graphite as cathode in terms of specific capacity, capacity stability, and coulombic efficiency to be coupled in the future with a hard carbon-based anode in a full sodium dual-ion battery. To this end, a detailed study was made of the influence of applied current density, upper cut-off voltage (UCOV), and electrolyte—in terms of both salt concentration and solvent mixture—on the intercalation/de-intercalation of PF6− anions in the graphite cathode. Low (37.2 mA g−1) and high (372.0 mA g−1) currents, UCOVs from 4.8 to 5.2 V, electrolytes with NaPF6 salt concentrations in the range of 0.2–1.2M and EC:DEC, EC:DMC and EC:EMC solvent mixtures were studied. The best graphite cathode performance was attained in 1.2MNaPF6/EC:EMC electrolyte at the highest current density of 372.0 mA g−1 and for the potential range between 2.9 and 5.0 V vs. Na/Na+. In these conditions, a discharge capacity of 79 mAh g−1 after 1000 cycles with a coulombic efficiency of 99 % and a remarkable capacity retention throughout cycling were determined.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/260872
https://api.elsevier.com/content/abstract/scopus_id/85104730325
url http://hdl.handle.net/10261/260872
https://api.elsevier.com/content/abstract/scopus_id/85104730325
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-094286-A-I00
Electrochimica Acta
https://doi.org/10.1016/j.electacta.2021.138360
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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