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dc.contributor.authorBillaud, Julietteen
dc.contributor.authorClément, Raphaële Jen
dc.contributor.authorArmstrong, A Roberten
dc.contributor.authorCanales-Vázquez, Jesúsen
dc.contributor.authorRozier, Patricken
dc.contributor.authorGrey, Clareen
dc.contributor.authorBruce, Peter Gen
dc.date.accessioned2015-04-29T10:59:55Z
dc.date.available2015-04-29T10:59:55Z
dc.date.issued2014-11-14en
dc.identifier.citationJournal of the American Chemical Society 2014, 136 (49), pp 17243–17248 DOI: 10.1021/ja509704ten
dc.identifier.issn0002-7863
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/247476
dc.description.abstractThere is much interest in Na-ion batteries for grid storage because of the lower projected cost compared with Li-ion. Identifying Earth abundant, low cost and safe materials that can function as intercalation cathodes in Na-ion batteries is an important challenge facing the field. Here we investigate such a material, β-NaMnO2, with a different structure from that of NaMnO2 polymorphs and other compounds studied extensively in the past. It exhibits a high capacity (of ca. 190 mA h g-1 at a rate of C/20), along with a good rate capability (142 mA h g-1 at a rate of 2C) and a good capacity retention (100 mA h g-1after 100 Na extraction/insertion cycles at a rate of 2C). Powder XRD, HRTEM and 23Na NMR studies revealed that this compound exhibits a complex structure consisting of intergrown regions of β-NaMnO2 and β-NaMnO2 domains. The collapse of the long-range structure at low Na content is expected to compromise the reversibility of the Na extraction and insertion processes occurring upon charge and discharge of the cathode material, respectively. Yet stable, reproducible and reversible Na intercalation is observed.
dc.description.sponsorshipRJC acknowledges support from the European Research Council (ERC). PGB acknowledges support from EPSRC including the SUPERGEN programme. JCV is grateful to MAT2010-19837-C06-C04 for funding.
dc.languageEnglishen
dc.language.isoenen
dc.publisherACS
dc.subjectSodium-Ion Batteryen
dc.subjectHigh performanceen
dc.subjectRate capabilityen
dc.subjectSolid-State NMRen
dc.titleβ-NaMnO2: a High Performance Cathode for Sodium-Ion Batteriesen
dc.typeArticle
dc.description.versionThis is the accepted manuscript. The final published version is available from ACS at http://pubs.acs.org/doi/abs/10.1021/ja509704t.en
prism.endingPage17248
prism.publicationDate2014en
prism.publicationNameJournal of the American Chemical Societyen
prism.startingPage17243
prism.volume136en
dc.rioxxterms.funderERC
dc.rioxxterms.funderEPSRC
rioxxterms.versionofrecord10.1021/ja509704ten
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2014-11-14en
dc.contributor.orcidGrey, Clare [0000-0001-5572-192X]
dc.identifier.eissn1520-5126
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idUNIVERSITY OF OXFORD (FB EPSRC) (EP/L019469/1)
pubs.funder-project-idEPSRC (via Imperial College London) (EP/K002252/1)
rioxxterms.freetoread.startdate2015-11-14


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