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Structure and properties of Li-ion conducting polymer gel electrolytes based on ionic liquids of the pyrrolidinium cation and the bis(trifluoromethanesulfonyl)imide anion

Jagath Pitawala (Institutionen för teknisk fysik, Kondenserade materiens fysik) ; M. A. Navarra ; B. Scrosati ; Per Jacobsson (Institutionen för teknisk fysik, Kondenserade materiens fysik) ; Aleksandar Matic (Institutionen för teknisk fysik, Kondenserade materiens fysik)
Journal of Power Sources (0378-7753). Vol. 245 (2014), p. 830-835.
[Artikel, refereegranskad vetenskaplig]

We have investigated the structure and physical properties of Li-ion conducting polymer gel electrolytes functionalized with ionic liquid/lithium salt mixtures. The membranes are based on poly(vinylidene fluoride-co-hexafluoropropylene) copolymer, PVdF-HFP, and two ionic liquids: pyrrolidinium cations, N-butyl-N-methylpyrrolidinium (PyR14+), N-butyl-N-ethylpyrrolidinium (PyR24+), and bis(trifluoromethanesulfonyl) imide anion (TFSI). The ionic liquids where doped with 0.2 mol kg(-1) LiTFSI. The resulting membranes are freestanding, flexible, and nonvolatile. The structure of the polymer and the interactions between the polymer and the ionic liquid electrolyte have been studied using Raman spectroscopy. The ionic conductivity of the membranes has been studied using dielectric spectroscopy whereas the thermal properties were investigated using differential scanning caloriometry (DSC).

Nyckelord: Ionic liquids, PVdF-HFP gel polymer electrolytes, Ionic conductivity, Glass transition



Denna post skapades 2013-11-04. Senast ändrad 2015-12-17.
CPL Pubid: 186040

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens fysik (1900-2015)

Ämnesområden

Elektrokemi

Chalmers infrastruktur

Relaterade publikationer

Denna publikation ingår i:


Physical Properties and Interactions of Ionic Liquids and Ionic Liquid Li-salt mixtures


 


Projekt

Denna publikation är ett resultat av följande projekt:


Advanced, High Performance, Polymer Lithium Batteries for Electrochemical Storage (APPLES) (EC/FP7/265644)