title: Fluorine-free electrolytes for all-solid sodium-ion batteries based on percyano-substituted organic salts.
abstract: A new family of fluorine-free solid-polymer electrolytes, for use in sodium-ion battery applications, is presented. Three novel sodium salts withdiffuse negative charges: sodium pentacyanopropenide (NaPCPI), sodium 2,3,4,5-tetracyanopirolate (NaTCP) and sodium 2,4,5-tricyanoimidazolate (NaTIM) were designed andtested in a poly(ethylene oxide) (PEO) matrix as polymer electrolytes for anall-solid sodium-ion battery. Due to unique, non-covalent structural configurations of anions, improved ionic conductivities were observed. As an example, "liquid-like" high conductivities (>1 mS cm-1) were obtained above 70 °C for solid-polymer electrolyte with a PEO to NaTCP molar ratio of 16:1. All presented salts showed high thermal stability and suitable windows of electrochemical stability between 3 and 5 V. These new anions open a new class of compounds with non-covalent structure for electrolytes system applications.
authors.affiliation: Polymer Ionics Research Group, Faculty of Chemistry Warsaw University, of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Anna
authors.initials: A
authors.lastname: Bitner-Michalska
authors.affiliation: Polymer Ionics Research Group, Faculty of Chemistry Warsaw University, of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Gene M
authors.initials: GM
authors.lastname: Nolis
authors.affiliation: Polymer Ionics Research Group, Faculty of Chemistry Warsaw University, of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Grażyna
authors.initials: G
authors.lastname: Żukowska
authors.affiliation: Polymer Ionics Research Group, Faculty of Chemistry Warsaw University, of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Aldona
authors.initials: A
authors.lastname: Zalewska
authors.affiliation: Polymer Ionics Research Group, Faculty of Chemistry Warsaw University, of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Marcin
authors.initials: M
authors.lastname: Poterała
authors.affiliation: Polymer Ionics Research Group, Faculty of Chemistry Warsaw University, of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Tomasz
authors.initials: T
authors.lastname: Trzeciak
authors.affiliation: Polymer Ionics Research Group, Faculty of Chemistry Warsaw University, of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Maciej
authors.initials: M
authors.lastname: Dranka
authors.affiliation: Polymer Ionics Research Group, Faculty of Chemistry Warsaw University, of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Michał
authors.initials: M
authors.lastname: Kalita
authors.affiliation: Polymer Ionics Research Group, Faculty of Chemistry Warsaw University, of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Piotr
authors.initials: P
authors.lastname: Jankowski
authors.affiliation: Polymer Ionics Research Group, Faculty of Chemistry Warsaw University, of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Leszek
authors.initials: L
authors.lastname: Niedzicki
authors.affiliation: Polymer Ionics Research Group, Faculty of Chemistry Warsaw University, of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Janusz
authors.initials: J
authors.lastname: Zachara
authors.affiliation: Polymer Ionics Research Group, Faculty of Chemistry Warsaw University, of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Marek
authors.initials: M
authors.lastname: Marcinek
authors.affiliation: Polymer Ionics Research Group, Faculty of Chemistry Warsaw University, of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Władysław
authors.initials: W
authors.lastname: Wieczorek