Na – superionics in Advanced Energy Materials

In a recent issue of Advanced Energy Materials we report on a novel class of solid state electrolytes capable of reaching high Na-ionic conductivities at room temperature (superionic). By inserting the borohydride anion into dodekahydroborate materials we introduce additional structural disorder and open migration pathways sufficiently large to allow high mobility of both Na+ and Li+ ions at remarkably low activation energies. In particular Na-conducting Materials of this kind are expected to be a viable solution for large scale grid storage in stationary battery installations, where the specific energy density and output voltage of the material is not ultimately crucial.

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