Effect of fluorination treatment on electrochemical properties of M1Ni3.5Co0.6Mn0.4Al0.5 hydrogen storage alloy

Detalhes bibliográficos
Autor(a) principal: Huang,Hongxia
Data de Publicação: 2012
Outros Autores: Huang,Kelong
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000500022
Resumo: The influence of surface treatment by solutions of NH4F, LiF and LiF containing KBH4 on the structure and electrochemical properties of the M1Ni3.5Co0.6Mn0.4Al0.5 hydrogen storage alloy (in which M1 denotes mischmetal) is investigated. The fluorination treatment improves the electrochemical performances of the M1Ni3.5Co0.6Mn0.4Al0.5 alloy. The maximum discharge capacity (Cmax) increases from 314.8 to 325.7 (NH4F), 326.5 (LiF) and 316.4 mAh g-1 (LiF+KBH4). After 60 cycles, the capacity retention rate increases from 83.5 to 84.8% (NH4F), 89.5% (LiF) and 93.9% (LiF+KBH4). The results of the linear polarization and anodic polarization reveal that the exchange current density (I0) and the limiting current density (I L) increase after fluorination treatment, indicating an improvement of the kinetics of the hydrogen absorption/desorption.
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spelling Effect of fluorination treatment on electrochemical properties of M1Ni3.5Co0.6Mn0.4Al0.5 hydrogen storage alloyhydrogen storage alloysLaNi5-based electrode hydridesfluorination treatmentelectrochemical propertiesThe influence of surface treatment by solutions of NH4F, LiF and LiF containing KBH4 on the structure and electrochemical properties of the M1Ni3.5Co0.6Mn0.4Al0.5 hydrogen storage alloy (in which M1 denotes mischmetal) is investigated. The fluorination treatment improves the electrochemical performances of the M1Ni3.5Co0.6Mn0.4Al0.5 alloy. The maximum discharge capacity (Cmax) increases from 314.8 to 325.7 (NH4F), 326.5 (LiF) and 316.4 mAh g-1 (LiF+KBH4). After 60 cycles, the capacity retention rate increases from 83.5 to 84.8% (NH4F), 89.5% (LiF) and 93.9% (LiF+KBH4). The results of the linear polarization and anodic polarization reveal that the exchange current density (I0) and the limiting current density (I L) increase after fluorination treatment, indicating an improvement of the kinetics of the hydrogen absorption/desorption.Sociedade Brasileira de Química2012-05-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000500022Journal of the Brazilian Chemical Society v.23 n.5 2012reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532012000500022info:eu-repo/semantics/openAccessHuang,HongxiaHuang,Kelongeng2012-06-01T00:00:00Zoai:scielo:S0103-50532012000500022Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2012-06-01T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Effect of fluorination treatment on electrochemical properties of M1Ni3.5Co0.6Mn0.4Al0.5 hydrogen storage alloy
title Effect of fluorination treatment on electrochemical properties of M1Ni3.5Co0.6Mn0.4Al0.5 hydrogen storage alloy
spellingShingle Effect of fluorination treatment on electrochemical properties of M1Ni3.5Co0.6Mn0.4Al0.5 hydrogen storage alloy
Huang,Hongxia
hydrogen storage alloys
LaNi5-based electrode hydrides
fluorination treatment
electrochemical properties
title_short Effect of fluorination treatment on electrochemical properties of M1Ni3.5Co0.6Mn0.4Al0.5 hydrogen storage alloy
title_full Effect of fluorination treatment on electrochemical properties of M1Ni3.5Co0.6Mn0.4Al0.5 hydrogen storage alloy
title_fullStr Effect of fluorination treatment on electrochemical properties of M1Ni3.5Co0.6Mn0.4Al0.5 hydrogen storage alloy
title_full_unstemmed Effect of fluorination treatment on electrochemical properties of M1Ni3.5Co0.6Mn0.4Al0.5 hydrogen storage alloy
title_sort Effect of fluorination treatment on electrochemical properties of M1Ni3.5Co0.6Mn0.4Al0.5 hydrogen storage alloy
author Huang,Hongxia
author_facet Huang,Hongxia
Huang,Kelong
author_role author
author2 Huang,Kelong
author2_role author
dc.contributor.author.fl_str_mv Huang,Hongxia
Huang,Kelong
dc.subject.por.fl_str_mv hydrogen storage alloys
LaNi5-based electrode hydrides
fluorination treatment
electrochemical properties
topic hydrogen storage alloys
LaNi5-based electrode hydrides
fluorination treatment
electrochemical properties
description The influence of surface treatment by solutions of NH4F, LiF and LiF containing KBH4 on the structure and electrochemical properties of the M1Ni3.5Co0.6Mn0.4Al0.5 hydrogen storage alloy (in which M1 denotes mischmetal) is investigated. The fluorination treatment improves the electrochemical performances of the M1Ni3.5Co0.6Mn0.4Al0.5 alloy. The maximum discharge capacity (Cmax) increases from 314.8 to 325.7 (NH4F), 326.5 (LiF) and 316.4 mAh g-1 (LiF+KBH4). After 60 cycles, the capacity retention rate increases from 83.5 to 84.8% (NH4F), 89.5% (LiF) and 93.9% (LiF+KBH4). The results of the linear polarization and anodic polarization reveal that the exchange current density (I0) and the limiting current density (I L) increase after fluorination treatment, indicating an improvement of the kinetics of the hydrogen absorption/desorption.
publishDate 2012
dc.date.none.fl_str_mv 2012-05-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000500022
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000500022
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532012000500022
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.23 n.5 2012
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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