title: Design and synthesis of the superionic conductor Na10SnP2S12.
abstract: Sodium-ion batteries are emerging as candidates for large-scale energy storage due to their low cost and the wide variety of cathode materials available. As battery size and adoption in critical applications increases, safety concerns are resurfacing due to the inherent flammability of organic electrolytes currently in use in both lithium and sodium battery chemistries. Development of solid-state batteries with ionic electrolytes eliminates this concern, while also allowing novel device architectures and potentially improving cycle life. Here we report the computation-assisted discovery and synthesis of a high-performance solid-state electrolyte material: Na10SnP2S12, with room temperature ionic conductivity of 0.4 mS cm(-1) rivalling the conductivity of the best sodium sulfide solid electrolytes to date. We also computationally investigate the variants of this compound where tin is substituted by germanium or silicon and find that the latter may achieve even higher conductivity.
authors.affiliation: Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: William D
authors.initials: WD
authors.lastname: Richards
authors.affiliation: Samsung R&D Institute Japan, Minoh Semba Center Building 13F, Semba Nishi 2-1-11, Minoh, Osaka 562-0036, Japan.
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Tsujimura
authors.affiliation: Samsung Advanced Institute of Technology-USA, 255 Main Street, Suite 702, Cambridge, Massachusetts 02142, USA.
authors.forename: Lincoln J
authors.initials: LJ
authors.lastname: Miara
authors.affiliation: Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.|Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: Jae Chul
authors.initials: JC
authors.lastname: Kim
authors.affiliation: Department of NanoEngineering, University of California San Diego, La Jolla, California 92093-0448, USA.
authors.forename: Shyue Ping
authors.identifier: http://orcid.org/0000-0001-5726-2587
authors.initials: SP
authors.lastname: Ong
authors.affiliation: Samsung R&D Institute Japan, Minoh Semba Center Building 13F, Semba Nishi 2-1-11, Minoh, Osaka 562-0036, Japan.
authors.forename: Ichiro
authors.initials: I
authors.lastname: Uechi
authors.affiliation: Samsung R&D Institute Japan, Minoh Semba Center Building 13F, Semba Nishi 2-1-11, Minoh, Osaka 562-0036, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Suzuki
authors.affiliation: Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.|Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.|Department of Materials Science and Engineering, University of California Berkeley, Berkeley, California 94720, USA.
authors.forename: Gerbrand
authors.initials: G
authors.lastname: Ceder