Na3PSe4: A Novel Chalcogenide Solid Electrolyte with High Ionic Conductivity

A new Na3PSe4 compound is synthesized and exhibits a large cell parameter of 7.3094 Å, thereby providing 3D channels that are optimal for Na ion diffusion. Na3PSe4 has the highest ionic conductivity reported for chalcogenides so far, with a value of over 1 mS cm−1 at room temperature and a low activation energy of 0.21 eV. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.