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나노입자 연구단
나노입자 연구단
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A family of high-performance cathode materials for Na-ion batteries, Na3(VO1-xPO4)2 F1+2x (0 ≤ x ≤ 1): Combined first-principles and experimental study

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Title
A family of high-performance cathode materials for Na-ion batteries, Na3(VO1-xPO4)2 F1+2x (0 ≤ x ≤ 1): Combined first-principles and experimental study
Author(s)
Park Y.-U.; Seo D.-H.; Kim H.; Kim J.; Lee S.; Kim B.; Kisuk Kang
Publication Date
2014-08
Journal
ADVANCED FUNCTIONAL MATERIALS, v.24, no.29, pp.4603 - 4614
Publisher
WILEY-V C H VERLAG GMBH
Abstract
Room-temperature Na-ion batteries (NIBs) have recently attracted attention as potential alternatives to current Li-ion batteries (LIBs). The natural abundance of sodium and the similarity between the electrochemical properties of NIBs and LIBs make NIBs well suited for applications requiring low cost and long-term reliability. Here, the first successful synthesis of a series of Na3(VO1-xPO4)2F1+2x (0 ≤ x ≤ 1) compounds as a new family of high-performance cathode materials for NIBs is reported. The Na3(VO1-xPO4)2F1+2x series can function as high-performance cathodes for NIBs with high energy density and good cycle life, although the redox mechanism varies depending on the composition. The combined first-principles calculations and experimental analysis reveal the detailed structural and electrochemical mechanisms of the various compositions in solid solutions of Na3(VOPO4)2F and Na3V2(PO4)2F3. The comparative data for the Na y (VO1-xPO4)2F1+2x electrodes show a clear relationship among V3+/V4+/V5+ redox reactions, Na+-Na+ interactions, and Na+ intercalation mechanisms in NIBs. The new family of high-energy cathode materials reported here is expected to spur the development of low-cost, high-performance NIBs. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
URI
https://pr.ibs.re.kr/handle/8788114/928
ISSN
1616-301X
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Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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