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Ternary polymer electrolytes incorporating pyrrolidinium-imide ionic liquids

de Vries, Henrik; Jeong, Sangsik; Passerini, Stefano

Herein is reported the performance of ternary polymer electrolytes incorporating ionic liquids, showing higher ionic conductivity over a wide temperature range than binary polymer-salt systems, while guaranteeing higher safety compared to liquid, organic electrolytes or gel electrolytes. In particular, the electrochemical performance and the interactions between poly(ethylene oxide) (PEO), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and several pyrrolidinium-based ionic liquids is comparatively investigated. Eight different polymer electrolytes were produced to test the ionic conductivity and long-time (more than 1400 hours) cycling stability in symmetrical lithium cells. Thermal analysis was used to investigate the thermal stability and degree of crystallinity. Six of the eight investigated samples are found fully amorphous at room temperature. In general, the properties of the polymer electrolytes are influenced by both Ionic liquid ions. The ether function in the side chain of the pyrrolidinium increases the ionic conductivity but, in some cases, lowers the thermal and electrochemical stability.

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DOI: 10.5445/IR/1000047604
DOI: 10.1039/C4RA16070C
Zitationen: 21
Web of Science
Zitationen: 19
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Jahr 2015
Sprache Englisch
Identifikator ISSN: 2046-2069
KITopen-ID: 1000047604
HGF-Programm 37.01.12 (POF III, LK 01)
Erschienen in RSC Advances
Band 5
Heft 18
Seiten 13598-13606
Bemerkung zur Veröffentlichung RSC geförderter Open Access-Artikel
Nachgewiesen in Scopus
Web of Science
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