Development of vanadium-based polyanion positive electrode active materials for high-voltage sodium-based batteries

Semyon D. Shraer, Nikita D. Luchinin, Ivan A. Trussov, Dmitry A. Aksyonov, Anatoly V. Morozov, Sergey V. Ryazantsev, Anna R. Iarchuk, Polina A. Morozova, Victoria A. Nikitina, Keith J. Stevenson, Evgeny V. Antipov, Artem M. Abakumov and Stanislav S. Fedotov ()
Additional contact information
Semyon D. Shraer: Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology
Nikita D. Luchinin: Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology
Ivan A. Trussov: Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology
Dmitry A. Aksyonov: Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology
Anatoly V. Morozov: Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology
Sergey V. Ryazantsev: Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology
Anna R. Iarchuk: Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology
Polina A. Morozova: Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology
Victoria A. Nikitina: Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology
Keith J. Stevenson: Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology
Evgeny V. Antipov: Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology
Artem M. Abakumov: Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology
Stanislav S. Fedotov: Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Polyanion compounds offer a playground for designing prospective electrode active materials for sodium-ion storage due to their structural diversity and chemical variety. Here, by combining a NaVPO4F composition and KTiOPO4-type framework via a low-temperature (e.g., 190 °C) ion-exchange synthesis approach, we develop a high-capacity and high-voltage positive electrode active material. When tested in a coin cell configuration in combination with a Na metal negative electrode and a NaPF6-based non-aqueous electrolyte solution, this cathode active material enables a discharge capacity of 136 mAh g−1 at 14.3 mA g−1 with an average cell discharge voltage of about 4.0 V. Furthermore, a specific discharge capacity of 123 mAh g−1 at 5.7 A g−1 is also reported for the same cell configuration. Through ex situ and operando structural characterizations, we also demonstrate that the reversible Na-ion storage at the positive electrode occurs mostly via a solid-solution de/insertion mechanism.

Date: 2022
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DOI: 10.1038/s41467-022-31768-5

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