Article Dans Une Revue ACS Applied Energy Materials Année : 2026

Na10Mn4O9: Synthesis, Structure, and Electrochemical Properties

Résumé

In the search for sustainable cathode materials for Na–ion batteries, Mn-based oxides have emerged as attractive candidates owing to their earth abundance and structural versatility. In this context, a comprehensive investigation of the electrochemical behavior of the sodium-rich Mn2+ oxide Na10Mn4O9 toward sodium extraction/insertion is presented. The structural framework of this phase, prepared through a simple solid-state synthesis at 450 °C, is built on MnO4 and MnO3 polyhedra. Seven sodium ions per unit formula can be extracted during the first charge, and XAS analysis reveals the main transformation into a layered NaxMnO2·Na2O composite. Upon further cycling, once this phase is formed, the material delivers a reversible capacity of 110 mAh g–1 at an average potential of 2.24 V vs Na+/Na.

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Dates et versions

hal-05500441 , version 1 (09-02-2026)

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Tanguy Soudant, Vadim Kovrugin, Gwenaëlle Rousse, Antoine Maignan, Antonella Iadecola, et al.. Na10Mn4O9: Synthesis, Structure, and Electrochemical Properties. ACS Applied Energy Materials, 2026, 9 (3), pp.1616-1626. ⟨10.1021/acsaem.5c03485⟩. ⟨hal-05500441⟩
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