Mixed anion effect on the ionic transport behavior, complexation and various physicochemical properties of ionic liquid based polymer gel electrolyte membranes. Issue 77 (1st August 2016)

• Record Type: Journal Article
• Authors: Shalu, ; Balo, Liton; Gupta, Himani; Singh, Varun kumar; Singh, Rajendra Kumar
• Is Part Of: RSC advances. Volume 6:Issue 77(2016)
• Page Start: 73028
• Page End: 73039
• Publication Date: 2016-08-01
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra10340e
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Incorporation of IL in PGEMs increases the amorphicity of the membranes, through reducing the intermolecular interaction between the polymer chains, and also increases the membrane ionic conductivity. Abstract : Li-ion conducting polymer gel electrolyte membranes (PGEMs) containing ionic liquid (IL), 1-butyl-3-methylimidazolium tetrafluroborate BMIMBF4, polymer poly(vinylidene fluoride- co -hexafluoropropylene) PVdF-HFP and lithium bis(trifluoromethanesulfonyl)imide LiTFSI salt (having different anion i.e. BF4 − and TFSI − ) have been synthesized and characterized by various techniques. The results show that the synthesized PGEMs have good free-standing characteristics, good thermal stability (300–400 °C) and also have a wide electrochemical window (ECW) ∼4.0–4.20 V. The conductivity increases with increasing amount of IL, and attains a value of 3.2 × 10 −3 S cm −1 at room temperature for the PGEMs containing higher loadings of IL. A high total ionic transference number (∼0.99) and cationic transference number ( t Li + ∼ 0.33) for the PGEMs containing higher loadings of IL have been obtained.