title: Exceptional superionic conductivity in disordered sodium decahydro-closo-decaborate.
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.
authors.affiliation: NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, 20899-6102, USA.
authors.forename: Terrence J
authors.initials: TJ
authors.lastname: Udovic
authors.forename: Motoaki
authors.initials: M
authors.lastname: Matsuo
authors.forename: Wan Si
authors.initials: WS
authors.lastname: Tang
authors.forename: Hui
authors.initials: H
authors.lastname: Wu
authors.forename: Vitalie
authors.initials: V
authors.lastname: Stavila
authors.forename: Alexei V
authors.initials: AV
authors.lastname: Soloninin
authors.forename: Roman V
authors.initials: RV
authors.lastname: Skoryunov
authors.forename: Olga A
authors.initials: OA
authors.lastname: Babanova
authors.forename: Alexander V
authors.initials: AV
authors.lastname: Skripov
authors.forename: John J
authors.initials: JJ
authors.lastname: Rush
authors.forename: Atsushi
authors.initials: A
authors.lastname: Unemoto
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Takamura
authors.forename: Shin-Ichi
authors.initials: S
authors.lastname: Orimo
keywords: conductivity; sodium conductors; sodium decahydro-closo-decaborate; solid-state electrolytes; superionic