Realizing Three-Electron Redox Reactions in NASICON-Type NaCrNb(PO4)3 for Sodium Ion Battery Applications

Panin, R.V.; Cherkashchenko, I.R.; Zaitseva, V.V.; Samigullin, R.R.; Zakharkin, M.V.; Novichkov, D.A.; Babkin, A.V.; Mikheev, I.V.; Khasanova, N.R.; Antipov, E.V.

Авторы: Panin Rodion V., Cherkashchenko Ilia R., Zaitseva Valentina V., Samigullin Ruslan R., Zakharkin Maxim V., Novichkov Daniil A., Babkin Alexander V., Mikheev Ivan V., Khasanova Nellie R., Antipov Evgeny V.
Журнал: Chemistry of Materials
Том: 36
Год издания: 2024
Издательство: American Chemical Society
Местоположение издательства: United States
Первая страница: 6902
Последняя страница: 6911
DOI: 10.1021/acs.chemmater.4c00933
Аннотация: Sodium-ion batteries (SIB) technology offers an attractive alternative to rechargeable batteries for large-scale application. To meet the practical demands, it is essential to develop stable electrode materials with high capacity and high energy density. Herein, we demonstrate a successful activation of the of Nb5+/Nb4+, Nb4+/Nb3+ and Cr3+/Cr2+ redox couples in NASICON structured NaCrNb(PO4)3, thus introducing a novel three-electron reaction anode for sodium-ion batteries with high specific capacity. Carbon coated NaCrNb(PO4)3 synthesized using the Pechini sol-gel method demonstrates the reversible capacity of 162 mA h*g−1 at 1C rate and good cycling stability. This is a first example of NASICON type anode material with the Cr3+/Cr2+ reversible transition confirmed by Cr K-edge XANES measurements. Operando X-ray powder diffraction showed that sodium insertion-extraction in NaCrNb(PO4)3 proceeds through a combination of single-phase and biphasic processes. The scanning calorimetry study revealed the excellent thermal stability of NaCrNb(PO4)3, which exceeds that of hard carbon anodes, making it a promising anode material for sodium-ion batteries.
Добавил в систему: Панин Родион Владиславович

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Realizing Three-Electron Redox Reactions in NASICON-Type NaCrNb(PO4)3 for Sodium Ion Battery Applicationsстатья

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