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Single Lithium‐Ion Conducting Polymer Electrolytes Based on a Super‐Delocalized Polyanion
Author(s) -
Ma Qiang,
Zhang Heng,
Zhou Chongwang,
Zheng Liping,
Cheng Pengfei,
Nie Jin,
Feng Wenfang,
Hu YongSheng,
Li Hong,
Huang Xuejie,
Chen Liquan,
Armand Michel,
Zhou Zhibin
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201509299
Subject(s) - electrolyte , ethylene oxide , lithium (medication) , ionic conductivity , materials science , polymer , glass transition , delocalized electron , ion , polymer chemistry , conductivity , oxide , inorganic chemistry , chemical engineering , chemistry , organic chemistry , copolymer , composite material , medicine , electrode , engineering , metallurgy , endocrinology
Abstract A novel single lithium‐ion (Li‐ion) conducting polymer electrolyte is presented that is composed of the lithium salt of a polyanion, poly[(4‐styrenesulfonyl)(trifluoromethyl(S‐trifluoromethylsulfonylimino)sulfonyl)imide] (PSsTFSI − ), and high‐molecular‐weight poly(ethylene oxide) (PEO). The neat LiPSsTFSI ionomer displays a low glass‐transition temperature (44.3 °C; that is, strongly plasticizing effect). The complex of LiPSsTFSI/PEO exhibits a high Li‐ion transference number ( t Li + =0.91) and is thermally stable up to 300 °C. Meanwhile, it exhibits a Li‐ion conductivity as high as 1.35×10 −4 S cm −1 at 90 °C, which is comparable to that for the classic ambipolar LiTFSI/PEO SPEs at the same temperature. These outstanding properties of the LiPSsTFSI/PEO blended polymer electrolyte would make it promising as solid polymer electrolytes for Li batteries.