Improvement in ion transport in Na 3 PSe 4 –Na 3 SbSe 4 by Sb substitution

摘要: Exploration of advanced solid electrolytes is a highly relevant research topic for all-solid-state batteries and sensors. One the effective ways to improve ion transport cation substitution. In this work, single-phase Na3P1−x Sb x Se4 polycrystalline compounds are synthesized via solid-state reaction method. The impact Sb substitution on chemical structure revealed by X-ray powder diffraction Raman spectroscopy. enlarges unit cell thus increases ionic conductivity Se4. Na3SbSe4 as fully substituted compound achieves lowest activation energy value 0.19 eV highest 3.7 mS/cm, one best values among sulfide electrolytes. Together with low grain-boundary resistance, single Na+ transference number, high thermal stability, very promising electrolyte sodium batteries.