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

被引：38

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.

引用

页数：10

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