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

被引：34
|
作者：
Bitner-Michalska, Anna [1 ]
Nolis, Gene M. [1 ]
Zukowska, Grazyna [1 ]
Zalewska, Aldona [1 ]
Poterala, Marcin [1 ]
Trzeciak, Tomasz [1 ]
Dranka, Maciej [1 ]
Kalita, Michal [1 ]
Jankowski, Piotr [1 ]
Niedzicki, Leszek [1 ]
Zachara, Janusz [1 ]
Marcinek, Marek [1 ]
Wieczorek, Wladyslaw [1 ]
机构：
[1] Warsaw Univ Technol, Fac Chem, Polymer Ion Res Grp, Noakowskiego 3, PL-00664 Warsaw, Poland
来源：
SCIENTIFIC REPORTS | 2017年 / 7卷
关键词：
POLYMER ELECTROLYTES; POLY(ETHYLENE OXIDE); VIBRATIONAL SPECTROSCOPY; LITHIUM; CONDUCTIVITY; TRANSPORT; COMPLEXES; ANIONS;
D O I：
10.1038/srep40036
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
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 degrees 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.
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页数：10
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