Multielectron-capable Li-rich polyanion material with high operating voltage: Li5V2PO4F8 for Li-ion batteries

Simple item page
dc.contributor.authorKim, MKen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorKang, Ben_AU
dc.date.accessioned2021-06-28T23:10:38Zen_AU
dc.date.available2021-06-28T23:10:38Zen_AU
dc.date.issued2019-12-13en_AU
dc.date.statistics2021-06-24en_AU
dc.description.abstractPolyanion compounds have relatively low energy density compared to plain oxides as cathode materials. We for the first time report on a Li-rich fluorophosphate compound, Li5V2PO4F8, that can have high energy density originating from both the multielectron reaction of vanadium and high voltage induced by a fluorine. The developed material has a new crystal structure that has a robust three-dimensional framework of corner-sharing octahedra VO2F4 with tetrahedra PO4 and three-dimensional lithium ion diffusion pathways, which can facilitate the (de)intercalation of lithium ions. Its theoretical capacity is 285 mAh/g when two electrons are exploited. Practically, it shows the highest redox voltage, ∼4.4 V (vs Li/Li+), among V3+/V4+ redox reactions, with 111 mAh/g of reversible capacity. Only in the first charge does it show an active redox reaction of the V4+/V5+ at ∼4.9 V (vs Li/Li+) with 228 mAh/g of charge capacity. Moreover, the vanadium-deficient phase shows stable capacity retention and good rate capability at both charging and discharging rates up to the 2C rate. The discovery of the lithium- and fluorine-rich phosphate compounds reported here introduces a new family of cathode materials, and further exploration and optimization can be expected to unlock the full potential of this family. © 2019 American Chemical Societyen_AU
dc.identifier.citationKim, M., Avdeev, M., & Kang, B. (2019). Multielectron-capable Li-rich polyanion material with high operating voltage: Li5V2PO4F8 for Li-ion batteries. ACS Energy Letters, 5(2), 403-410. doi:10.1021/acsenergylett.9b02451en_AU
dc.identifier.issn2380-8195en_AU
dc.identifier.issue2en_AU
dc.identifier.journaltitleACS Energy Lettersen_AU
dc.identifier.pagination403-410en_AU
dc.identifier.urihttps://doi.org/10.1021/acsenergylett.9b02451en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10931en_AU
dc.identifier.volume5en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectCrystal structureen_AU
dc.subjectVanadiumen_AU
dc.subjectLithiumen_AU
dc.subjectRedox reactionsen_AU
dc.subjectRadioisotope batteriesen_AU
dc.subjectOxidesen_AU
dc.titleMultielectron-capable Li-rich polyanion material with high operating voltage: Li5V2PO4F8 for Li-ion batteriesen_AU
dc.typeJournal Articleen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Journal Articles