Citation: Gouget, Guillaume; Duttine, Mathieu; Chung, U-Chan; Fourcade, S\'ebastien; Mauvy, Fabrice; Braida, Marc-David; Le Mercier, Thierry; Demourgues, Alain (2019). High Ionic Conductivity in Oxygen-Deficient Ti-Substituted Sodium Niobates and the Key Role of Structural Features. Chemistry of Materials, 31, pp. 2828-.