Li transport in fresh and aged LiMn2O4 cathodes via electrochemical strain microscopy

Detalhes bibliográficos
Autor(a) principal: Luchkin, Sergey Yu.
Data de Publicação: 2015
Outros Autores: Romanyuk, Konstantin, Ivanov, Maxim, Kholkin, Andrei L.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10773/20579
Resumo: Transport properties of Li+ mobile ions in fresh and aged LiMn2O4 battery cathodes were studied at the nanoscale via electrochemical strain microscopy (ESM), time spectroscopy, and voltage spectroscopy mapping. Both Vegard and plausible non-Vegard contributions to the ESM signal were identified in electrochemical hysteresis loops obtained on fresh and aged samples. In the fresh cathodes, the Vegard contribution dominates the signal, while in the aged samples different shape of hysteresis loops indicates an additional plausible non-Vegard contribution. Non-uniform spatial distribution of the electrochemical loop opening in LiMn2O4 particles studied in the aged samples indicates stronger variation of the Li diffusion coefficient at the microscale as compared to the fresh specimens. Time spectroscopy measurements revealed a suppression of the local Li diffusivity in aged samples. The mechanisms of the cathode aging are discussed in the context of observed nanoscale ESM response. (C) 2015 AIP Publishing LLC.
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spelling Li transport in fresh and aged LiMn2O4 cathodes via electrochemical strain microscopyLITHIUM-ION BATTERIESNANOMETER RESOLUTIONELECTRONIC-STRUCTURESPINELDIFFUSIONSTOICHIOMETRYSPECTROSCOPYTEMPERATUREMANGANITESCONDUCTIONTransport properties of Li+ mobile ions in fresh and aged LiMn2O4 battery cathodes were studied at the nanoscale via electrochemical strain microscopy (ESM), time spectroscopy, and voltage spectroscopy mapping. Both Vegard and plausible non-Vegard contributions to the ESM signal were identified in electrochemical hysteresis loops obtained on fresh and aged samples. In the fresh cathodes, the Vegard contribution dominates the signal, while in the aged samples different shape of hysteresis loops indicates an additional plausible non-Vegard contribution. Non-uniform spatial distribution of the electrochemical loop opening in LiMn2O4 particles studied in the aged samples indicates stronger variation of the Li diffusion coefficient at the microscale as compared to the fresh specimens. Time spectroscopy measurements revealed a suppression of the local Li diffusivity in aged samples. The mechanisms of the cathode aging are discussed in the context of observed nanoscale ESM response. (C) 2015 AIP Publishing LLC.AMER INST PHYSICS2017-12-07T19:52:08Z2015-01-01T00:00:00Z2015info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/20579eng0021-897910.1063/1.4927816Luchkin, Sergey Yu.Romanyuk, KonstantinIvanov, MaximKholkin, Andrei L.info: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:RCAAP2024-02-22T11:40:27Zoai:ria.ua.pt:10773/20579Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:55:15.390171Repositório 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 Li transport in fresh and aged LiMn2O4 cathodes via electrochemical strain microscopy
title Li transport in fresh and aged LiMn2O4 cathodes via electrochemical strain microscopy
spellingShingle Li transport in fresh and aged LiMn2O4 cathodes via electrochemical strain microscopy
Luchkin, Sergey Yu.
LITHIUM-ION BATTERIES
NANOMETER RESOLUTION
ELECTRONIC-STRUCTURE
SPINEL
DIFFUSION
STOICHIOMETRY
SPECTROSCOPY
TEMPERATURE
MANGANITES
CONDUCTION
title_short Li transport in fresh and aged LiMn2O4 cathodes via electrochemical strain microscopy
title_full Li transport in fresh and aged LiMn2O4 cathodes via electrochemical strain microscopy
title_fullStr Li transport in fresh and aged LiMn2O4 cathodes via electrochemical strain microscopy
title_full_unstemmed Li transport in fresh and aged LiMn2O4 cathodes via electrochemical strain microscopy
title_sort Li transport in fresh and aged LiMn2O4 cathodes via electrochemical strain microscopy
author Luchkin, Sergey Yu.
author_facet Luchkin, Sergey Yu.
Romanyuk, Konstantin
Ivanov, Maxim
Kholkin, Andrei L.
author_role author
author2 Romanyuk, Konstantin
Ivanov, Maxim
Kholkin, Andrei L.
author2_role author
author
author
dc.contributor.author.fl_str_mv Luchkin, Sergey Yu.
Romanyuk, Konstantin
Ivanov, Maxim
Kholkin, Andrei L.
dc.subject.por.fl_str_mv LITHIUM-ION BATTERIES
NANOMETER RESOLUTION
ELECTRONIC-STRUCTURE
SPINEL
DIFFUSION
STOICHIOMETRY
SPECTROSCOPY
TEMPERATURE
MANGANITES
CONDUCTION
topic LITHIUM-ION BATTERIES
NANOMETER RESOLUTION
ELECTRONIC-STRUCTURE
SPINEL
DIFFUSION
STOICHIOMETRY
SPECTROSCOPY
TEMPERATURE
MANGANITES
CONDUCTION
description Transport properties of Li+ mobile ions in fresh and aged LiMn2O4 battery cathodes were studied at the nanoscale via electrochemical strain microscopy (ESM), time spectroscopy, and voltage spectroscopy mapping. Both Vegard and plausible non-Vegard contributions to the ESM signal were identified in electrochemical hysteresis loops obtained on fresh and aged samples. In the fresh cathodes, the Vegard contribution dominates the signal, while in the aged samples different shape of hysteresis loops indicates an additional plausible non-Vegard contribution. Non-uniform spatial distribution of the electrochemical loop opening in LiMn2O4 particles studied in the aged samples indicates stronger variation of the Li diffusion coefficient at the microscale as compared to the fresh specimens. Time spectroscopy measurements revealed a suppression of the local Li diffusivity in aged samples. The mechanisms of the cathode aging are discussed in the context of observed nanoscale ESM response. (C) 2015 AIP Publishing LLC.
publishDate 2015
dc.date.none.fl_str_mv 2015-01-01T00:00:00Z
2015
2017-12-07T19:52:08Z
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 http://hdl.handle.net/10773/20579
url http://hdl.handle.net/10773/20579
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0021-8979
10.1063/1.4927816
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 AMER INST PHYSICS
publisher.none.fl_str_mv AMER INST PHYSICS
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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