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Novel polymeric aromatic lithium sulfonylimides as salts for polymer electrolytes
Author(s) -
Nie Jin,
Liu DanFan,
Wang XuDong,
Liu LieWei
Publication year - 2002
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.10732
Subject(s) - lithium (medication) , crystallinity , electrolyte , ethylene oxide , electrochemistry , thermal stability , polymer chemistry , materials science , conductivity , polymer , oxide , chemistry , inorganic chemistry , organic chemistry , copolymer , electrode , medicine , composite material , endocrinology
Three new polymeric aromatic lithium sulfonylimides were used as salts in high molecular weight poly(ethylene oxide) (PEO) electrolytes. Their conductivity and electrochemical stability behaviors were investigated. The electrolytes with lithium poly[4,4′‐(hexafluoroisopropylidene)diphenoxy]sulfonylimide (LiPHFIPSI) showed a better conductive performance compared with the other two lithium salts. The best conductivity was obtained for PEO/LiPHFIPSI EO/Li = 16 (1.90 × 10 −4 S/cm at 60°C). Thermal analysis indicated that the salts effectively decreased the crystallinity of PEO. Moreover, the electrolytes also had good electrochemical stability and their oxidative potential was to 5.5 V versus Li/Li + . © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 1802–1805, 2002