DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Minkyung | - |
dc.contributor.author | Avdeev, Maxim | - |
dc.contributor.author | Kang, Byoungwoo | - |
dc.date.accessioned | 2020-04-06T16:50:41Z | - |
dc.date.available | 2020-04-06T16:50:41Z | - |
dc.date.created | 2020-03-31 | - |
dc.date.issued | 2020-02 | - |
dc.identifier.issn | 2380-8195 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/102492 | - |
dc.description.abstract | Polyanion 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, similar to 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 similar to 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. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.relation.isPartOf | ACS ENERGY LETTERS | - |
dc.subject | Cathodes | - |
dc.subject | Crystal structure | - |
dc.subject | Ions | - |
dc.subject | Lithium-ion batteries | - |
dc.subject | Redox reactions | - |
dc.subject | Vanadium | - |
dc.subject | Capacity retention | - |
dc.subject | High energy densities | - |
dc.subject | Intercalation of lithium | - |
dc.subject | Lithium ion diffusion | - |
dc.subject | Phosphate compounds | - |
dc.subject | Reversible capacity | - |
dc.subject | Theoretical capacity | - |
dc.subject | Three-dimensional frameworks | - |
dc.subject | Lithium compounds | - |
dc.title | Multielectron-Capable Li-Rich Polyanion Material with High Operating Voltage: Li5V2PO4F8 for Li-Ion Batteries | - |
dc.type | Article | - |
dc.identifier.doi | 10.1021/acsenergylett.9b02451 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | ACS ENERGY LETTERS, v.5, no.2, pp.403 - 410 | - |
dc.identifier.wosid | 000514258200009 | - |
dc.citation.endPage | 410 | - |
dc.citation.number | 2 | - |
dc.citation.startPage | 403 | - |
dc.citation.title | ACS ENERGY LETTERS | - |
dc.citation.volume | 5 | - |
dc.contributor.affiliatedAuthor | Kim, Minkyung | - |
dc.contributor.affiliatedAuthor | Kang, Byoungwoo | - |
dc.identifier.scopusid | 2-s2.0-85078200185 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | LITHIUM | - |
dc.subject.keywordPlus | CATHODES | - |
dc.subject.keywordPlus | DESIGN | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Electrochemistry | - |
dc.relation.journalWebOfScienceCategory | Energy & Fuels | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Electrochemistry | - |
dc.relation.journalResearchArea | Energy & Fuels | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
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