Solvothermal synthesis of Sn3N4 as a high capacity sodium-ion anode: theoretical and experimental study of its storage mechanism

Nanocrystalline Sn₃N₄ produced under solvothermal conditions provides a stable, reversible capacity of ∼850 mA h g⁻¹ in sodium half-cells. The charge storage mechanism appears to combine insertion, conversion and alloying steps.