Exceptional superionic conductivity in disordered sodium decahydro-closo-decaborate

Terrence J Udovic; Motoaki Matsuo; Wan Si Tang; Hui Wu; Vitalie Stavila; Alexei V Soloninin; Roman V Skoryunov; Olga A Babanova; Alexander V Skripov; John J Rush; Atsushi Unemoto; Hitoshi Takamura; Shin-Ichi Orimo

doi:10.1002/adma.201403157

Exceptional superionic conductivity in disordered sodium decahydro-closo-decaborate

Adv Mater. 2014 Dec 3;26(45):7622-6. doi: 10.1002/adma.201403157. Epub 2014 Oct 13.

Authors

Terrence J Udovic¹, Motoaki Matsuo, Wan Si Tang, Hui Wu, Vitalie Stavila, Alexei V Soloninin, Roman V Skoryunov, Olga A Babanova, Alexander V Skripov, John J Rush, Atsushi Unemoto, Hitoshi Takamura, Shin-Ichi Orimo

Affiliation

¹ NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, 20899-6102, USA.

PMID: 25312377
DOI: 10.1002/adma.201403157

Abstract

Na2 B10 H10 exhibits exceptional superionic conductivity above ca. 360 K (e.g., ca. 0.01 S cm(-1) at 383 K) concomitant with its transition from an ordered monoclinic structure to a face-centered-cubic arrangement of orientationally disordered B10 H10 (2-) anions harboring a vacancy-rich Na(+) cation sublattice. This discovery represents a major advancement for solid-state Na(+) fast-ion conduction at technologically relevant device temperatures.

Keywords: conductivity; sodium conductors; sodium decahydro-closo-decaborate; solid-state electrolytes; superionic.