Abstract:We report a new sodium fast-ion conductor, Na 3 B 5 S 9 , that exhibits a high Na ion total conductivity of 0.80 mS cm À 1 (sintered pellet; cold-pressed pellet = 0.21 mS cm À 1 ). The structure consists of corner-sharing B 10 S 20 supertetrahedral clusters, which create a framework that supports 3D Na ion diffusion channels. The Na ions are well-distributed in the channels and form a disordered sublattice spanning five Na crystallographic sites. The combination of structural elucidation via single crystal X-r… Show more
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