On the relevance of the polar β-phase of poly(vinylidene fluoride) for high performance lithium-Ion battery separators

Detalhes bibliográficos
Autor(a) principal: Kundu, Manab
Data de Publicação: 2017
Outros Autores: Costa, Carlos M., Dias, Juliana Cristina Rodrigues, Maceiras, Alberto, Vilas, José Luis, Lanceros-Méndez, S.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://hdl.handle.net/1822/48574
Resumo: Separator membranes based on poly(vinylidene fluoride), PVDF, poly(vinylidene fluoride-co-trifluoroethylene), PVDF-TrFE, poly(vinylidene fluoride-co-hexafluropropylene), PVDF-HFP and poly(vinylidene fluoride-co-chlorotrifluoroethylene), PVDF-CTFE were prepared by solvent casting method using N,N-dimethylformamide (DMF) as solvent. In all cases, the same polymer/solvent ratio and solvent evaporation temperature were used. For all membranes, porous microstructure is achieved with a degree of porosity larger than 50%. The β-phase content as well as degree of crystallinity were different for each membrane, which were lower for the co-polymer membranes when compared with PVDF. On the other hand, the observed ionic conductivity values, electrolyte uptake, tortuosity and MacMullin number were similar for all membranes. The electrochemical performance of the separator membranes was evaluated in Li/C–LiFePO4 half-cell configuration showing good cyclability and rate capability for all membranes. Among the all separator membranes, PVDF-TrFE demonstrate the best electrochemical performance, with a discharge capacity value of 87 mAh.g-1 after 50 cycles with a capacity retention of 78 % at 2C.Finally, the correlation between the β-phase content in the membranes and the cycling performance was demonstrated (which was significant at high-C rates): larger β-phase contents, leading higher polarity, facilitates faster lithium ion migration within the separator for similar microstructures.
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spelling On the relevance of the polar β-phase of poly(vinylidene fluoride) for high performance lithium-Ion battery separatorsenergyLi-ion batteriesEngenharia e Tecnologia::NanotecnologiaScience & TechnologySeparator membranes based on poly(vinylidene fluoride), PVDF, poly(vinylidene fluoride-co-trifluoroethylene), PVDF-TrFE, poly(vinylidene fluoride-co-hexafluropropylene), PVDF-HFP and poly(vinylidene fluoride-co-chlorotrifluoroethylene), PVDF-CTFE were prepared by solvent casting method using N,N-dimethylformamide (DMF) as solvent. In all cases, the same polymer/solvent ratio and solvent evaporation temperature were used. For all membranes, porous microstructure is achieved with a degree of porosity larger than 50%. The β-phase content as well as degree of crystallinity were different for each membrane, which were lower for the co-polymer membranes when compared with PVDF. On the other hand, the observed ionic conductivity values, electrolyte uptake, tortuosity and MacMullin number were similar for all membranes. The electrochemical performance of the separator membranes was evaluated in Li/C–LiFePO4 half-cell configuration showing good cyclability and rate capability for all membranes. Among the all separator membranes, PVDF-TrFE demonstrate the best electrochemical performance, with a discharge capacity value of 87 mAh.g-1 after 50 cycles with a capacity retention of 78 % at 2C.Finally, the correlation between the β-phase content in the membranes and the cycling performance was demonstrated (which was significant at high-C rates): larger β-phase contents, leading higher polarity, facilitates faster lithium ion migration within the separator for similar microstructures.This work was supported by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Funding UID/FIS/04650/2013. The authors thank FEDER funds through the COMPETE 2020 Programme and National Funds through FCT under the projects PTDC/CTM-ENE/5387/2014 and UID/CTM/50025/2013 and grants SFRH/BD/90215/2012 (J.C.D.) and SFRH/BPD/112547/2015 (C.M.C.). The authors acknowledge funding by the Spanish Ministry of Economy and Competitiveness (MINECO) through the project MAT2016-76039-C4-3-R (AEI/FEDER, UE) (including the FEDER financial support) and from the Basque Government Industry Department under the ELKARTEK Program. Authors are grateful to the Government of the Basque Country for financial support (Grupos de Investigación, IT718-13). The authors thank Solvay, Timcal and Phostech for kindly supplying the high quality materials.info:eu-repo/semantics/publishedVersionAmerican Chemical SocietyUniversidade do MinhoKundu, ManabCosta, Carlos M.Dias, Juliana Cristina RodriguesMaceiras, AlbertoVilas, José LuisLanceros-Méndez, S.20172017-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/48574engKundu, M., Costa, C. M., Dias, J., Maceiras, A., Vilas, J. L., & Lanceros-Méndez, S. (2017, November 17). On the Relevance of the Polar β-Phase of Poly(vinylidene fluoride) for High Performance Lithium-Ion Battery Separators. The Journal of Physical Chemistry C. American Chemical Society (ACS). http://doi.org/10.1021/acs.jpcc.7b092271932-744710.1021/acs.jpcc.7b09227info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:54:41Zoai:repositorium.sdum.uminho.pt:1822/48574Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:54:17.964422Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv On the relevance of the polar β-phase of poly(vinylidene fluoride) for high performance lithium-Ion battery separators
title On the relevance of the polar β-phase of poly(vinylidene fluoride) for high performance lithium-Ion battery separators
spellingShingle On the relevance of the polar β-phase of poly(vinylidene fluoride) for high performance lithium-Ion battery separators
Kundu, Manab
energy
Li-ion batteries
Engenharia e Tecnologia::Nanotecnologia
Science & Technology
title_short On the relevance of the polar β-phase of poly(vinylidene fluoride) for high performance lithium-Ion battery separators
title_full On the relevance of the polar β-phase of poly(vinylidene fluoride) for high performance lithium-Ion battery separators
title_fullStr On the relevance of the polar β-phase of poly(vinylidene fluoride) for high performance lithium-Ion battery separators
title_full_unstemmed On the relevance of the polar β-phase of poly(vinylidene fluoride) for high performance lithium-Ion battery separators
title_sort On the relevance of the polar β-phase of poly(vinylidene fluoride) for high performance lithium-Ion battery separators
author Kundu, Manab
author_facet Kundu, Manab
Costa, Carlos M.
Dias, Juliana Cristina Rodrigues
Maceiras, Alberto
Vilas, José Luis
Lanceros-Méndez, S.
author_role author
author2 Costa, Carlos M.
Dias, Juliana Cristina Rodrigues
Maceiras, Alberto
Vilas, José Luis
Lanceros-Méndez, S.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Kundu, Manab
Costa, Carlos M.
Dias, Juliana Cristina Rodrigues
Maceiras, Alberto
Vilas, José Luis
Lanceros-Méndez, S.
dc.subject.por.fl_str_mv energy
Li-ion batteries
Engenharia e Tecnologia::Nanotecnologia
Science & Technology
topic energy
Li-ion batteries
Engenharia e Tecnologia::Nanotecnologia
Science & Technology
description Separator membranes based on poly(vinylidene fluoride), PVDF, poly(vinylidene fluoride-co-trifluoroethylene), PVDF-TrFE, poly(vinylidene fluoride-co-hexafluropropylene), PVDF-HFP and poly(vinylidene fluoride-co-chlorotrifluoroethylene), PVDF-CTFE were prepared by solvent casting method using N,N-dimethylformamide (DMF) as solvent. In all cases, the same polymer/solvent ratio and solvent evaporation temperature were used. For all membranes, porous microstructure is achieved with a degree of porosity larger than 50%. The β-phase content as well as degree of crystallinity were different for each membrane, which were lower for the co-polymer membranes when compared with PVDF. On the other hand, the observed ionic conductivity values, electrolyte uptake, tortuosity and MacMullin number were similar for all membranes. The electrochemical performance of the separator membranes was evaluated in Li/C–LiFePO4 half-cell configuration showing good cyclability and rate capability for all membranes. Among the all separator membranes, PVDF-TrFE demonstrate the best electrochemical performance, with a discharge capacity value of 87 mAh.g-1 after 50 cycles with a capacity retention of 78 % at 2C.Finally, the correlation between the β-phase content in the membranes and the cycling performance was demonstrated (which was significant at high-C rates): larger β-phase contents, leading higher polarity, facilitates faster lithium ion migration within the separator for similar microstructures.
publishDate 2017
dc.date.none.fl_str_mv 2017
2017-01-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://hdl.handle.net/1822/48574
url https://hdl.handle.net/1822/48574
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Kundu, M., Costa, C. M., Dias, J., Maceiras, A., Vilas, J. L., & Lanceros-Méndez, S. (2017, November 17). On the Relevance of the Polar β-Phase of Poly(vinylidene fluoride) for High Performance Lithium-Ion Battery Separators. The Journal of Physical Chemistry C. American Chemical Society (ACS). http://doi.org/10.1021/acs.jpcc.7b09227
1932-7447
10.1021/acs.jpcc.7b09227
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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