Hidróxido misto de níquel e manganês estabilizado na fase alfa: material promissor para dispositivos eletroquímicos de armazenamento de energia
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFG |
Texto Completo: | http://repositorio.bc.ufg.br/tede/handle/tede/9611 |
Resumo: | In the search for new energy resources, nickel hydroxide (Ni(OH) 2 ) has been widely studied as a positive electrode for secondary batteries, however, one of the limitations of this material is the rapid conversion between its polymorphic phases, affecting its electrochemical performance and, therefore, commercial applications. In order to stabilize Ni(OH) 2 on the polymorphic phase alpha, as well as to improve its electrochemical behavior, Ni 2+ ions were isomorphically replaced by Mn 2+ ions in different proportions (5, 25 and 50%) in Ni(OH) 2 . The mixed nickel and manganese hydroxides obtained by the modified Tower method presented nanometric dimensions (5 - 10 nm) confirmed by the transmission electron microscopy technique. Through the x-ray photoelectron spectroscopy technique it was possible to determine that the metal ions of the mixed hydroxides are in the 2+ oxidation state. All the mixed hydroxides synthesized showed the diffraction peak (003) at 2θ = 10.6o, thus confirming the alpha polymorphic phase. The electrochemical behavior of the modified electrodes was evaluated by cyclic voltammetry and electrochemical impedance spectroscopy. Even after 1000 voltammetric cycles the electrodes modified with the mixed hydroxides (Ni-75 and Ni-50) did not present a significant displacement of the anodic peak potential to more positive potentials, thus indicating the stabilization of the material in the alpha polymorphic phase. With the increase in the isomorphic substitution of Ni 2+ ions by Mn 2+ ions, a decrease in Ni 2+ / Ni 3+ charge transfer resistance wasobserved, as well as a significant increase in charge transfer re sistance for the evolution of O 2 . After 5000 consecutive charge and discharge cycles, electrodes modified with mixed hydroxides had a specific capacity of 187.5 C g -1 (Ni-95), 417.5 C g -1 (Ni-75) and 294.5 C g -1 (Ni-50) and a load retention of 90.6% (Ni-95), 86.5% (Ni 75) and 71.4% (Ni-50), these values being higher than the hydroxide of pure nickel and in summary are quite promising for the application in energy storage devices. |
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Martins, Paulo Robertohttp://lattes.cnpq.br/0107474250870898Martins, Paulo RobertoColtro, Wendell Karlos TomazelliChagas, Rafael Pavão dashttp://lattes.cnpq.br/5482416442901792Gomes, Allan Pablo2019-05-22T15:21:32Z2019-04-18GOMES, A. P. Hidróxido misto de níquel e manganês estabilizado na fase alfa: material promissor para dispositivos eletroquímicos de armazenamento de energia. 2019. 106 f. Dissertação (Mestrado em Química) - Universidade Federal de Goiás, Goiânia, 2019.http://repositorio.bc.ufg.br/tede/handle/tede/9611ark:/38995/0013000002mqqIn the search for new energy resources, nickel hydroxide (Ni(OH) 2 ) has been widely studied as a positive electrode for secondary batteries, however, one of the limitations of this material is the rapid conversion between its polymorphic phases, affecting its electrochemical performance and, therefore, commercial applications. In order to stabilize Ni(OH) 2 on the polymorphic phase alpha, as well as to improve its electrochemical behavior, Ni 2+ ions were isomorphically replaced by Mn 2+ ions in different proportions (5, 25 and 50%) in Ni(OH) 2 . The mixed nickel and manganese hydroxides obtained by the modified Tower method presented nanometric dimensions (5 - 10 nm) confirmed by the transmission electron microscopy technique. Through the x-ray photoelectron spectroscopy technique it was possible to determine that the metal ions of the mixed hydroxides are in the 2+ oxidation state. All the mixed hydroxides synthesized showed the diffraction peak (003) at 2θ = 10.6o, thus confirming the alpha polymorphic phase. The electrochemical behavior of the modified electrodes was evaluated by cyclic voltammetry and electrochemical impedance spectroscopy. Even after 1000 voltammetric cycles the electrodes modified with the mixed hydroxides (Ni-75 and Ni-50) did not present a significant displacement of the anodic peak potential to more positive potentials, thus indicating the stabilization of the material in the alpha polymorphic phase. With the increase in the isomorphic substitution of Ni 2+ ions by Mn 2+ ions, a decrease in Ni 2+ / Ni 3+ charge transfer resistance wasobserved, as well as a significant increase in charge transfer re sistance for the evolution of O 2 . After 5000 consecutive charge and discharge cycles, electrodes modified with mixed hydroxides had a specific capacity of 187.5 C g -1 (Ni-95), 417.5 C g -1 (Ni-75) and 294.5 C g -1 (Ni-50) and a load retention of 90.6% (Ni-95), 86.5% (Ni 75) and 71.4% (Ni-50), these values being higher than the hydroxide of pure nickel and in summary are quite promising for the application in energy storage devices.Na busca por novos recursos energéticos, o hidróxido de níquel (Ni(OH) 2 ) tem sido amplamente estudado como eletrodo positivo para baterias secundárias,no entanto, uma das limitações deste material é a rápida conversão entre suas fases polimórficas, afetando assim o seu desempenho eletroquímico e, por conseguinte, as aplicações comerciais. Com o intuito de estabilizar o Ni(OH) 2 na fase polimórfica alfa, bem como melhorar o seu comportamento eletroquímico, íons de Ni 2+ foram substituídos isomorficamente por íons Mn 2+ em diferentes proporções (5, 25 e 50%) na matriz do Ni(OH) 2 . Os hidróxidos mistos de níquel e manganês, obtidos pelo método Tower modificado, apresentaram dimensões nanométricas (5 – 10 nm) confirmadas pela técnica de microscopia eletrônica de transmissão. Através da espectroscopia fotoeletônica de raios X foi possível determinar que os íons metálicos dos hidróxidos mistos encontram-se no estado de oxidação 2+. Todos os hidróxidos mistos sintetizados apresentaram o pico de difração (003) em 2θ = 10,6o, confirmando a fase polimórfica alfa. O comportamento eletroquímico dos eletrodos modificados foi avaliado por voltametria cíclica e espectroscopia de impedância eletroquímica. Mesmo após 1000 ciclos voltamétricos, os eletrodos modificados com os hidróxidos mistos (Ni -75 e Ni-50) não apresentaram um deslocamento significativo do potencial de pico anódico para potenciais mais positivos, indicando assim a estabilização do material na fase polimórfica alfa. Com o crescente aumento da substituição isomórfica de íons Ni 2+ por íons Mn 2+ foi observado uma diminuição da resistência de transferência de carga para o processo Ni 2+ /Ni 3+ , bem como um aumento significativo para a resistência de transferência de carga para a evolução de O 2. Após 5000 ciclos consecutivos de carga e descarga, os eletrodos modificados com os hidróxidos mistos apresentaram uma capacidade específica de 187,5 C g -1 (Ni-95), 417,5 C g -1 (Ni-75) e 294,5 C g -1 (Ni-50) e uma retenção de carga de 90,6% (Ni-95), 86,5% (Ni-75) e 71,4% (Ni-50), sendo estes valores superiores ao hidróxido de níquel puro e, portanto, são bastante promissores para a aplicação em dispositivos de armazenamento de energia.Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2019-05-22T15:03:00Z No. of bitstreams: 2 Dissertação - Allan Pablo Gomes -2019.pdf: 3189915 bytes, checksum: c6c38e2dbf2338d9e06250a520694aca (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2019-05-22T15:21:32Z (GMT) No. of bitstreams: 2 Dissertação - Allan Pablo Gomes -2019.pdf: 3189915 bytes, checksum: c6c38e2dbf2338d9e06250a520694aca (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Made available in DSpace on 2019-05-22T15:21:32Z (GMT). No. of bitstreams: 2 Dissertação - Allan Pablo Gomes -2019.pdf: 3189915 bytes, checksum: c6c38e2dbf2338d9e06250a520694aca (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2019-04-18Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESapplication/pdfporUniversidade Federal de GoiásPrograma de Pós-graduação em Química (IQ)UFGBrasilInstituto de Química - IQ (RG)http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessHidróxido misto de níquel e manganêsEletroquímicaDispositivos eletroquímicos de armazenamento de energiaMixed nickel and manganese hydroxideElectrochemicalElectrochemical energy storage devicesCIENCIAS EXATAS E DA TERRA::QUIMICAHidróxido misto de níquel e manganês estabilizado na fase alfa: material promissor para dispositivos eletroquímicos de armazenamento de energiaStabilized mixed nickel/manganese hydroxide in the alpha polymorphic phase: promising material for electrochemical energy storage devicesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis663693921325415158600600600600782606674374119727815717003253031171952075167498588264571reponame:Repositório Institucional da UFGinstname:Universidade Federal de Goiás (UFG)instacron:UFGLICENSElicense.txtlicense.txttext/plain; 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dc.title.eng.fl_str_mv |
Hidróxido misto de níquel e manganês estabilizado na fase alfa: material promissor para dispositivos eletroquímicos de armazenamento de energia |
dc.title.alternative.eng.fl_str_mv |
Stabilized mixed nickel/manganese hydroxide in the alpha polymorphic phase: promising material for electrochemical energy storage devices |
title |
Hidróxido misto de níquel e manganês estabilizado na fase alfa: material promissor para dispositivos eletroquímicos de armazenamento de energia |
spellingShingle |
Hidróxido misto de níquel e manganês estabilizado na fase alfa: material promissor para dispositivos eletroquímicos de armazenamento de energia Gomes, Allan Pablo Hidróxido misto de níquel e manganês Eletroquímica Dispositivos eletroquímicos de armazenamento de energia Mixed nickel and manganese hydroxide Electrochemical Electrochemical energy storage devices CIENCIAS EXATAS E DA TERRA::QUIMICA |
title_short |
Hidróxido misto de níquel e manganês estabilizado na fase alfa: material promissor para dispositivos eletroquímicos de armazenamento de energia |
title_full |
Hidróxido misto de níquel e manganês estabilizado na fase alfa: material promissor para dispositivos eletroquímicos de armazenamento de energia |
title_fullStr |
Hidróxido misto de níquel e manganês estabilizado na fase alfa: material promissor para dispositivos eletroquímicos de armazenamento de energia |
title_full_unstemmed |
Hidróxido misto de níquel e manganês estabilizado na fase alfa: material promissor para dispositivos eletroquímicos de armazenamento de energia |
title_sort |
Hidróxido misto de níquel e manganês estabilizado na fase alfa: material promissor para dispositivos eletroquímicos de armazenamento de energia |
author |
Gomes, Allan Pablo |
author_facet |
Gomes, Allan Pablo |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Martins, Paulo Roberto |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/0107474250870898 |
dc.contributor.referee1.fl_str_mv |
Martins, Paulo Roberto |
dc.contributor.referee2.fl_str_mv |
Coltro, Wendell Karlos Tomazelli |
dc.contributor.referee3.fl_str_mv |
Chagas, Rafael Pavão das |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/5482416442901792 |
dc.contributor.author.fl_str_mv |
Gomes, Allan Pablo |
contributor_str_mv |
Martins, Paulo Roberto Martins, Paulo Roberto Coltro, Wendell Karlos Tomazelli Chagas, Rafael Pavão das |
dc.subject.por.fl_str_mv |
Hidróxido misto de níquel e manganês Eletroquímica Dispositivos eletroquímicos de armazenamento de energia |
topic |
Hidróxido misto de níquel e manganês Eletroquímica Dispositivos eletroquímicos de armazenamento de energia Mixed nickel and manganese hydroxide Electrochemical Electrochemical energy storage devices CIENCIAS EXATAS E DA TERRA::QUIMICA |
dc.subject.eng.fl_str_mv |
Mixed nickel and manganese hydroxide Electrochemical Electrochemical energy storage devices |
dc.subject.cnpq.fl_str_mv |
CIENCIAS EXATAS E DA TERRA::QUIMICA |
description |
In the search for new energy resources, nickel hydroxide (Ni(OH) 2 ) has been widely studied as a positive electrode for secondary batteries, however, one of the limitations of this material is the rapid conversion between its polymorphic phases, affecting its electrochemical performance and, therefore, commercial applications. In order to stabilize Ni(OH) 2 on the polymorphic phase alpha, as well as to improve its electrochemical behavior, Ni 2+ ions were isomorphically replaced by Mn 2+ ions in different proportions (5, 25 and 50%) in Ni(OH) 2 . The mixed nickel and manganese hydroxides obtained by the modified Tower method presented nanometric dimensions (5 - 10 nm) confirmed by the transmission electron microscopy technique. Through the x-ray photoelectron spectroscopy technique it was possible to determine that the metal ions of the mixed hydroxides are in the 2+ oxidation state. All the mixed hydroxides synthesized showed the diffraction peak (003) at 2θ = 10.6o, thus confirming the alpha polymorphic phase. The electrochemical behavior of the modified electrodes was evaluated by cyclic voltammetry and electrochemical impedance spectroscopy. Even after 1000 voltammetric cycles the electrodes modified with the mixed hydroxides (Ni-75 and Ni-50) did not present a significant displacement of the anodic peak potential to more positive potentials, thus indicating the stabilization of the material in the alpha polymorphic phase. With the increase in the isomorphic substitution of Ni 2+ ions by Mn 2+ ions, a decrease in Ni 2+ / Ni 3+ charge transfer resistance wasobserved, as well as a significant increase in charge transfer re sistance for the evolution of O 2 . After 5000 consecutive charge and discharge cycles, electrodes modified with mixed hydroxides had a specific capacity of 187.5 C g -1 (Ni-95), 417.5 C g -1 (Ni-75) and 294.5 C g -1 (Ni-50) and a load retention of 90.6% (Ni-95), 86.5% (Ni 75) and 71.4% (Ni-50), these values being higher than the hydroxide of pure nickel and in summary are quite promising for the application in energy storage devices. |
publishDate |
2019 |
dc.date.accessioned.fl_str_mv |
2019-05-22T15:21:32Z |
dc.date.issued.fl_str_mv |
2019-04-18 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
GOMES, A. P. Hidróxido misto de níquel e manganês estabilizado na fase alfa: material promissor para dispositivos eletroquímicos de armazenamento de energia. 2019. 106 f. Dissertação (Mestrado em Química) - Universidade Federal de Goiás, Goiânia, 2019. |
dc.identifier.uri.fl_str_mv |
http://repositorio.bc.ufg.br/tede/handle/tede/9611 |
dc.identifier.dark.fl_str_mv |
ark:/38995/0013000002mqq |
identifier_str_mv |
GOMES, A. P. Hidróxido misto de níquel e manganês estabilizado na fase alfa: material promissor para dispositivos eletroquímicos de armazenamento de energia. 2019. 106 f. Dissertação (Mestrado em Química) - Universidade Federal de Goiás, Goiânia, 2019. ark:/38995/0013000002mqq |
url |
http://repositorio.bc.ufg.br/tede/handle/tede/9611 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.program.fl_str_mv |
663693921325415158 |
dc.relation.confidence.fl_str_mv |
600 600 600 600 |
dc.relation.department.fl_str_mv |
7826066743741197278 |
dc.relation.cnpq.fl_str_mv |
1571700325303117195 |
dc.relation.sponsorship.fl_str_mv |
2075167498588264571 |
dc.rights.driver.fl_str_mv |
http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Goiás |
dc.publisher.program.fl_str_mv |
Programa de Pós-graduação em Química (IQ) |
dc.publisher.initials.fl_str_mv |
UFG |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Instituto de Química - IQ (RG) |
publisher.none.fl_str_mv |
Universidade Federal de Goiás |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFG instname:Universidade Federal de Goiás (UFG) instacron:UFG |
instname_str |
Universidade Federal de Goiás (UFG) |
instacron_str |
UFG |
institution |
UFG |
reponame_str |
Repositório Institucional da UFG |
collection |
Repositório Institucional da UFG |
bitstream.url.fl_str_mv |
http://repositorio.bc.ufg.br/tede/bitstreams/4acdddff-7ee4-48a5-987d-e1732db2af6f/download http://repositorio.bc.ufg.br/tede/bitstreams/c7f82c48-c998-4443-96cc-12abf1c87604/download http://repositorio.bc.ufg.br/tede/bitstreams/799e2aa0-0358-4a17-acf4-9a6470a18311/download http://repositorio.bc.ufg.br/tede/bitstreams/b3d71d3d-6896-4ccb-99fa-19a36444df1c/download http://repositorio.bc.ufg.br/tede/bitstreams/0fbbc544-7ff6-45d2-9691-1b899bcc98ab/download |
bitstream.checksum.fl_str_mv |
bd3efa91386c1718a7f26a329fdcb468 4afdbb8c545fd630ea7db775da747b2f d41d8cd98f00b204e9800998ecf8427e d41d8cd98f00b204e9800998ecf8427e c6c38e2dbf2338d9e06250a520694aca |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFG - Universidade Federal de Goiás (UFG) |
repository.mail.fl_str_mv |
tasesdissertacoes.bc@ufg.br |
_version_ |
1811721355698110464 |