P2-Na0.6[Cr0.6Ti0.4]O2 cation-disordered electrode for high-rate symmetric rechargeable sodium-ion batteries

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dc.contributor.authorWang, Yen_AU
dc.contributor.authorXiao, Ren_AU
dc.contributor.authorHu, YSen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorChen, Len_AU
dc.date.accessioned2020-11-02T23:21:38Zen_AU
dc.date.available2020-11-02T23:21:38Zen_AU
dc.date.issued2015-04-24en_AU
dc.date.statistics2020-11-02en_AU
dc.description.abstractMost P2-type layered oxides exhibit Na+/vacancy-ordered superstructures because of strong Na+–Na+ interaction in the alkali metal layer and charge ordering in the transition metal layer. These superstructures evidenced by voltage plateaus in the electrochemical curves limit the Na+ ion transport kinetics and cycle performance in rechargeable batteries. Here we show that such Na+/vacancy ordering can be avoided by choosing the transition metal ions with similar ionic radii and different redox potentials, for example, Cr3+ and Ti4+. The designed P2-Na0.6[Cr0.6Ti0.4]O2 is completely Na+/vacancy-disordered at any sodium content and displays excellent rate capability and long cycle life. A symmetric sodium-ion battery using the same P2-Na0.6[Cr0.6Ti0.4]O2 electrode delivers 75% of the initial capacity at 12C rate. Our contribution demonstrates that the approach of preventing Na+/vacancy ordering by breaking charge ordering in the transition metal layer opens a simple way to design disordered electrode materials with high power density and long cycle life. Copyright © 2015, The Author(s)en_AU
dc.identifier.articlenumber6454en_AU
dc.identifier.citationWang, Y., Xiao, R., Hu, Y., Avdeev, M., & Chen, L.(2015). P2-Na0.6[Cr0.6Ti0.4]O2 cation-disordered electrode for high-rate symmetric rechargeable sodium-ion batteries. Nature Communications 6, 6954. doi:10.1038/ncomms7954en_AU
dc.identifier.issn2041-1723en_AU
dc.identifier.journaltitleNature Communicationsen_AU
dc.identifier.urihttps://doi.org/10.1038/ncomms7954en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/9950en_AU
dc.identifier.volume6en_AU
dc.language.isoenen_AU
dc.publisherSpringer Natureen_AU
dc.subjectRadioisotope batteriesen_AU
dc.subjectTransition elementsen_AU
dc.subjectAlkali metalsen_AU
dc.subjectElectrodesen_AU
dc.subjectCathodesen_AU
dc.subjectElectrochemical cellsen_AU
dc.subjectOxidesen_AU
dc.titleP2-Na0.6[Cr0.6Ti0.4]O2 cation-disordered electrode for high-rate symmetric rechargeable sodium-ion batteriesen_AU
dc.typeJournal Articleen_AU
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