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Sci Rep. 2017 Jan 09;7:40036. doi: 10.1038/srep40036.

Fluorine-free electrolytes for all-solid sodium-ion batteries based on percyano-substituted organic salts.

Scientific reports

Anna Bitner-Michalska, Gene M Nolis, Grażyna Żukowska, Aldona Zalewska, Marcin Poterała, Tomasz Trzeciak, Maciej Dranka, Michał Kalita, Piotr Jankowski, Leszek Niedzicki, Janusz Zachara, Marek Marcinek, Władysław Wieczorek

Affiliations

  1. Polymer Ionics Research Group, Faculty of Chemistry Warsaw University, of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.

PMID: 28067301 PMCID: PMC5220368 DOI: 10.1038/srep40036

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

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