title: Na3 SbS4 : A Solution Processable Sodium Superionic Conductor for All-Solid-State Sodium-Ion Batteries.
abstract: All-solid-state sodium-ion batteries that operate at room temperature are attractive candidates for use in large-scale energy storage systems. However, materials innovation in solid electrolytes is imperative to fulfill multiple requirements, including high conductivity, functional synthesis protocols for achieving intimate ionic contact with active materials, and air stability. A new, highly conductive (1.1 mS cm(-1) at 25 °C, Ea =0.20 eV) and dry air stable sodium superionic conductor, tetragonal Na3 SbS4 , is described. Importantly, Na3 SbS4 can be prepared by scalable solution processes using methanol or water, and it exhibits high conductivities of 0.1-0.3 mS cm(-1) . The solution-processed, highly conductive solidified Na3 SbS4 electrolyte coated on an active material (NaCrO2 ) demonstrates dramatically improved electrochemical performance in all-solid-state batteries.
authors.affiliation: School of Energy and Chemical Engineering, Department of Energy Engineering, UNIST, Ulsan, 44919, South Korea.
authors.forename: Abhik
authors.initials: A
authors.lastname: Banerjee
authors.affiliation: School of Energy and Chemical Engineering, Department of Energy Engineering, UNIST, Ulsan, 44919, South Korea.|School of Chemical and Biological Engineering, Seoul National University, Seoul, 151-742, South Korea.
authors.forename: Kern Ho
authors.initials: KH
authors.lastname: Park
authors.affiliation: Department of Energy Systems Engineering, DGIST, Daegu, 42988, South Korea.
authors.forename: Jongwook W
authors.initials: JW
authors.lastname: Heo
authors.affiliation: School of Energy and Chemical Engineering, Department of Energy Engineering, UNIST, Ulsan, 44919, South Korea.
authors.forename: Young Jin
authors.initials: YJ
authors.lastname: Nam
authors.affiliation: School of Energy and Chemical Engineering, Department of Energy Engineering, UNIST, Ulsan, 44919, South Korea.
authors.forename: Chang Ki
authors.initials: CK
authors.lastname: Moon
authors.affiliation: School of Chemical and Biological Engineering, Seoul National University, Seoul, 151-742, South Korea.
authors.forename: Seung M
authors.initials: SM
authors.lastname: Oh
authors.affiliation: Department of Energy Systems Engineering, DGIST, Daegu, 42988, South Korea. st.hong@dgist.ac.kr.
authors.forename: Seung-Tae
authors.initials: ST
authors.lastname: Hong
authors.affiliation: School of Energy and Chemical Engineering, Department of Energy Engineering, UNIST, Ulsan, 44919, South Korea. ysjung@unist.ac.kr.
authors.forename: Yoon Seok
authors.initials: YS
authors.lastname: Jung
keywords: batteries; chalcogens; sodium; solid electrolytes; solution process