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Stabilizing Na0.7MnO2 Cathode for Na-Ion Battery via Surface Coating

  • PHYSICS OF SOLID STATE AND CONDENSED MATTER
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Abstract

In our work, we synthesized a series of P2-Na0.7MnO2 (NMO) and P2-Na0.7Ni0.33Mn0.67O2 (NNMO) cathode materials by sintering from precursor powders at a temperature of 900°C in a stationary or in a flowing air atmosphere. By means of X-ray diffraction analysis it was shown that the material resulting composition strongly depends on the annealing conditions. During the synthesis in a stationary atmosphere, P2-contained samples of mixed sodium–nickel–cobalt oxide were obtained. At the same time, the structural disordering observed in the NMO material disappeared after the NMO coating with an admixture of sodium-nickel oxide (NNMO). The NNMO samples demonstrated a higher discharge capacity of 149 mA h g–1 compared to 123 mA h g–1 NMO. However, the coating effect was not able to prevent a rapid drop in capacity during cycling.

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Funding

This work was supported by the Russian Science Foundation, project no. 21-12-00261.

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Authors and Affiliations

  1. N.N. Semenov Federal Research Center for Chemical Physics, 119991, Moscow, Russia

    E. E. Ushakova, O. Yu. Ivanshina, S. V. Sumnikov & I. A. Bobrikov

  2. Joint Institute for Nuclear Research, Frank Laboratory of Neutron Physics, 141980, Dubna, Russia

    E. E. Ushakova

  3. Dubna State University, 141980, Dubna, Russia

    I. A. Bobrikov

Authors
  1. E. E. Ushakova
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  2. O. Yu. Ivanshina
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  3. S. V. Sumnikov
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  4. I. A. Bobrikov
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Corresponding author

Correspondence to E. E. Ushakova.

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The authors declare that they have no conflicts of interest.

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Ushakova, E.E., Ivanshina, O.Y., Sumnikov, S.V. et al. Stabilizing Na0.7MnO2 Cathode for Na-Ion Battery via Surface Coating. Phys. Part. Nuclei Lett. 19, 539–542 (2022). https://doi.org/10.1134/S1547477122050430

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  • DOI: https://doi.org/10.1134/S1547477122050430

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