Pentanary transition-metals Na-ion layered oxide cathode with highly reversible O3-P3 phase transition

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dc.contributor.authorGuo, Hen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorSun, Ken_AU
dc.contributor.authorMa, XBen_AU
dc.contributor.authorWang, HLen_AU
dc.contributor.authorHu, YSen_AU
dc.contributor.authorChen, DFen_AU
dc.date.accessioned2021-09-22T01:00:03Zen_AU
dc.date.available2021-09-22T01:00:03Zen_AU
dc.date.issued2021-05-15en_AU
dc.date.statistics2021-09-20en_AU
dc.description.abstractTwo dual-cation transition metal fluorides K2TiF6 and K2NbF7 are introduced into Mg(BH4)2 by ball-milling to catalyze the dehydrogenation of Mg(BH4)2. According to the DSC and TPD results, the onset dehydrogenation temperature of Mg(BH4)2 doped with K2TiF6 and K2NbF7 are remarkably reduced to 105.4 and 118.0 °C, respectively. Meanwhile, both the K2TiF6 and K2NbF7 catalyzed systems can release more than 6.4 wt% H2 under 280 °C, showing an improvement in dehydrogenation kinetics. In addition, the reversible capacity of the Mg(BH4)2–3%K2TiF6 system is 2.7 wt% at 280 °C in 250 min, which is enhanced comparing to that of pristine Mg(BH4)2. X-ray diffraction, Fourier-transformed infrared and 11B nuclear magnetic resonance investigations reveal that the K2TiF6 actually acts as a catalytic precursor to react with Mg(BH4)2, forming active hydrides of KBH4 and TiH2, which further serve as catalyzing agents to facilitate the re-generation of Mg(BH4)2 from intermediates under moderate conditions. © 2021 Elsevier B.V.en_AU
dc.identifier.articlenumber128704en_AU
dc.identifier.citationGuo, H., Avdeev, M., Sun, K., Ma, X., Wang, H., Hu, Y., & Chen, D. (2021). Pentanary transition-metals Na-ion layered oxide cathode with highly reversible O3-P3 phase transition. Chemical Engineering Journal, 412, 128704. doi:10.1016/j.cej.2021.128704en_AU
dc.identifier.issn1385-8947en_AU
dc.identifier.journaltitleChemical Engineering Journalen_AU
dc.identifier.urihttps://doi.org/10.1016/j.cej.2021.128704en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11781en_AU
dc.identifier.volume412en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectMagnesium compoundsen_AU
dc.subjectBorohydridesen_AU
dc.subjectDehydrogenationen_AU
dc.subjectTransition elementsen_AU
dc.subjectFluoridesen_AU
dc.subjectCationsen_AU
dc.subjectX-ray diffractionen_AU
dc.titlePentanary transition-metals Na-ion layered oxide cathode with highly reversible O3-P3 phase transitionen_AU
dc.typeJournal Articleen_AU
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