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Elucidating the origins of phase transformation hysteresis during electrochemical cycling of Li–Sb electrodes

hal.structure.identifierMaterials Department [Santa Barbara]
dc.contributor.authorCHANG, Donghee
hal.structure.identifierDepartment of Chemistry [Cambridge, UK]
hal.structure.identifierHarbin Institute of Technology [HIT]
dc.contributor.authorHUO, Hua
hal.structure.identifierDepartment of Chemistry [Cambridge, UK]
dc.contributor.authorJOHNSTON, Karen E.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierAdvanced Lithium Energy Storage Systems - ALISTORE-ERI [ALISTORE-ERI]
dc.contributor.authorMÉNÉTRIER, Michel
hal.structure.identifierAdvanced Lithium Energy Storage Systems - ALISTORE-ERI [ALISTORE-ERI]
hal.structure.identifierInstitut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM]
dc.contributor.authorMONCONDUIT, Laure
hal.structure.identifierDepartment of Chemistry [Cambridge, UK]
dc.contributor.authorGREY, Clare P.
hal.structure.identifierMaterials Department [Santa Barbara]
dc.contributor.authorVAN DER VEN, Anton
dc.date.issued2015
dc.identifier.issn2050-7488
dc.description.abstractEnWe investigate the origins of phase transformation hysteresis in electrodes of Li-ion batteries, focusing on the alloying reaction of Li with Sb. Electrochemical measurements confirm that the reaction path followed during Li insertion into Sb electrodes differs from that followed upon subsequent Li extraction. Results from first-principles calculations and NMR measurements indicate that Li3Sb is capable of tolerating high Li-vacancy concentrations. An unusually high Li mobility in Li3Sb facilitates over potentials during charging, which leads to a substantially larger driving force for the nucleation of Sb compared to that of Li2Sb. The differences in nucleation driving forces arise from a lever effect that favors phases with large changes in Li concentration over phases that are closer in composition along the equilibrium path. These properties provide an explanation for the observed path hysteresis between charge and discharge in the Li–Sb system and likely also play a role in intercalation compounds and other alloying reactions exhibiting similar phase transformation hysteresis.
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.title.enElucidating the origins of phase transformation hysteresis during electrochemical cycling of Li–Sb electrodes
dc.typeArticle de revue
dc.identifier.doi10.1039/C5TA06183K
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Materials Chemistry A
bordeaux.page18928-18943
bordeaux.volume3
bordeaux.issue37
bordeaux.peerReviewedoui
hal.identifierhal-01222861
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01222861v1
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