Topotactic Electron/Ion Transfer Reactions of Niobium Chalcogenides Nb3X4 with Tunnel Structure

Abstract

Cathodic reduction of Nb₃S₄ and Nb₃Se₄ electrodes in electrolytes containing cations of appropriate size results in the formation of ternary phases Aⁿ⁺ _x/n[Nb₃X₄]^x-. The cations Aⁿ⁺ are taken up into empty channels of the rigid lattice framework and exhibit high ionic mobility at room temperature.