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Recognition of V3+/V4+/V5+ Multielectron Reactions in Na3V(PO4)2: A Potential High Energy Density Cathode for Sodium-Ion Batteries

descriptionPublicationkeyboard_double_arrow_right Article , Other literature type , Journal 24 Feb 2020Publisher:MDPI AGJournal:Molecules, volume 25, page 1,000 (eissn: 1420-3049,

Authors: Yong Yang; Ziteng Liang; Weimin Zhao; Yan Chen; Yuxuan Xiang; Ke An; Haodong Liu; +2 Authors

doi: 10.3390/molecules25041000

pmid: 32102339

pmc: PMC7070626

Recognition of V3+/V4+/V5+ Multielectron Reactions in Na3V(PO4)2: A Potential High Energy Density Cathode for Sodium-Ion Batteries

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Abstract

Na3V(PO4)2 was reported recently as a novel cathode material with high theoretical energy density for Sodium-ion batteries (SIBs). However, whether V3+/V4+/V5+ multielectron reactions can be realized during the charging process is still an open question. In this work, Na3V(PO4)2 is synthesized by using a solid-state method. Its atomic composition and crystal structure are verified by X-ray diffraction (XRD) and neutron diffraction (ND) joint refinement. The electrochemical performance of Na3V(PO4)2 is evaluated in two different voltage windows, namely 2.5–3.8 and 2.5–4.3 V. 51V solid-state NMR (ssNMR) results disclose the presence of V5+ in Na2−xV(PO4)2 when charging Na3V(PO4)2 to 4.3 V, confirming Na3V(PO4)2 is a potential high energy density cathode through realization of V3+/V4+/V5+ multielectron reactions.

Related Organizations

Binzhou University
China (People's Republic of)
Oak Ridge National Laboratory
United States
Shandong University of Science and Technology
China (People's Republic of)
Collaborative Innovation Center of Chemistry for Energy Materials
China (People's Republic of)
Oak Ridge National Laboratory

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Keywords

Vanadium Compounds, Organic chemistry, Electrons, Article, QD241-441, Electric Power Supplies, Electricity, Solar Energy, solid-state nmr, Humans, Electrodes, Sodium, polyanion, Electrochemical Techniques, Cations, Monovalent, solid-state NMR, multielectron reaction, energy density

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