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Reactivity of complex hydrides Mg2FeH6, Mg2CoH5 and Mg2NiH4 with lithium ion: Far from equilibrium electrochemically driven conversion reactions

hal.structure.identifierLaboratoire réactivité et chimie des solides - UMR CNRS 7314 UPJV [LRCS]
dc.contributor.authorZAIDI, Warda
hal.structure.identifierLaboratoire réactivité et chimie des solides - UMR CNRS 7314 UPJV [LRCS]
dc.contributor.authorBONNET, Jean-Pierre
hal.structure.identifierInstitut de Chimie et des Matériaux Paris-Est [ICMPE]
dc.contributor.authorZHANG, J.
hal.structure.identifierInstitut de Chimie et des Matériaux Paris-Est [ICMPE]
dc.contributor.authorCUEVAS, Fermin
hal.structure.identifierInstitut de Chimie et des Matériaux Paris-Est [ICMPE]
dc.contributor.authorLATROCHE, Michel
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCOUILLAUD, Samuel
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorBOBET, Jean-Louis
hal.structure.identifierRéseau sur le stockage électrochimique de l'énergie [RS2E]
hal.structure.identifierInstitut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM ICMMM]
dc.contributor.authorSOUGRATI, Moulay Tahar
hal.structure.identifierInstitut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM ICMMM]
dc.contributor.authorJUMAS, Jean-Claude
hal.structure.identifierLaboratoire réactivité et chimie des solides - UMR CNRS 7314 UPJV [LRCS]
dc.contributor.authorAYMARD, Luc
dc.date.issued2013
dc.identifier.issn0360-3199
dc.description.abstractEnThe electrochemical reaction of lithium ion with Mg2FeH6, Mg2CoH5 and Mg2NiH4 complex hydrides prepared by reactive grinding is studied here. Plateaus at an average potential of 0.25 V, 0.24 V and 0.27 V corresponding to discharge capacities of 6.6, 5.5 and 3.6 Li can be achieved respectively for Mg2FeH6, Mg2CoH5 and Mg2NiH4. From in situ X-ray diffraction (XRD) characterizations of complex hydride based electrodes, dehydrogenation leads to a decrease of the intensities of the diffraction peaks suggesting a strong loss of crystallinity since formation of Mg and M (M = Fe, Co, Ni) peaks is not observed. 57Fe Mössbauer spectroscopy confirms the formation of nanoscale Fe or an amorphous Mg-Fe alloy during the decomposition of Mg2FeH6. Interestingly, lattice parameter variations suggest phase transitions in the Mg2NiH4 system involving the formation of low hydrogen content hydride Mg2NiH, while an increase of lattice parameters of Mg2CoH5 hydride could be attributed to the formation of a Mg2CoH5Lix solid solution compound up to x = 1.
dc.language.isoen
dc.publisherElsevier
dc.subject.enComplex hydrides
dc.subject.enConversion reactions
dc.subject.enLithium ion batteries
dc.title.enReactivity of complex hydrides Mg2FeH6, Mg2CoH5 and Mg2NiH4 with lithium ion: Far from equilibrium electrochemically driven conversion reactions
dc.typeArticle de revue
dc.identifier.doi10.1016/j.ijhydene.2013.01.157
dc.subject.halChimie/Matériaux
bordeaux.journalInternational Journal of Hydrogen Energy
bordeaux.page4798-4808
bordeaux.volume38
bordeaux.issue11
bordeaux.peerReviewedoui
hal.identifierhal-00815523
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00815523v1
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