The structural evolution of tetradymite-type Sb2Te3 in alkali ion batteries

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dc.contributor.authorGillard, Cen_AU
dc.contributor.authorJana, PPen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorSharma, Nen_AU
dc.date.accessioned2021-09-13T22:13:24Zen_AU
dc.date.available2021-09-13T22:13:24Zen_AU
dc.date.issued2021-08-05en_AU
dc.date.statistics2021-09-13en_AU
dc.description.abstractTetradymite-type Sb2Te3 is synthesised via a solid-state method, and its electrochemical phase evolution in Li, Na and K half-cells is experimentally investigated. Ex-situ X-ray diffraction data is analysed with the Rietveld method, revealing the occurrence of conversion reactions for all systems. Direct evidence of alloying and intercalation reactions is observed in the case of the Li system, while alloying is inferred for the K and Na systems. For the first time, Li intercalated Sb2Te3 is synthesised and a preliminary investigation of its magnetic properties is undertaken. Li intercalation does not significantly influence the magnetic phase transition temperature and does not appear to induce superconductivity. In addition, a preliminary study of the performance of Sb2Te3 as an electrode material for rechargeable Li, Na and K-half cells is undertaken. High initial capacities of 588, 521 and 906 mAh/g for Li, Na and K cells respectively are observed. However, capacity fade is rapid in all cases, with second discharge capacities dropping to 396, 173 and 98 mAh/g. This poor cyclability is generally associated with the large volume changes and irreversibilities associated with the conversion and alloying reactions. The capacities continue to decrease during extended cycling, with tenth cycle discharge capacities of 195, 26 and 24 mAh/g for Li, Na and K half cells respectively. Crown Copyright © 2021 Published by Elsevier B.V.en_AU
dc.identifier.articlenumber159378en_AU
dc.identifier.citationGillard, C., Jana, P. P., Avdeev, M., & Sharma, N. (2021). The structural evolution of tetradymite-type Sb2Te3 in alkali ion batteries. Journal of Alloys and Compounds, 871, 159378. doi:10.1016/j.jallcom.2021.159378en_AU
dc.identifier.issn0925-8388en_AU
dc.identifier.journaltitleJournal of Alloys and Compoundsen_AU
dc.identifier.urihttps://doi.org/10.1016/j.jallcom.2021.159378en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11680en_AU
dc.identifier.volume871en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectPhase transformationsen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectChalcogenidesen_AU
dc.subjectElectric batteriesen_AU
dc.subjectElectrochemistryen_AU
dc.subjectLithiumen_AU
dc.subjectSuperconductivityen_AU
dc.titleThe structural evolution of tetradymite-type Sb2Te3 in alkali ion batteriesen_AU
dc.typeJournal Articleen_AU
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