Electrochemical characterization of poly(vinylidene fluoride-co-hexafluoro propylene) based electrospun gel polymer electrolytes incorporating moth temperature ionic liquids as green electrolytes for lithium batteries

A series of gel polymer electrolytes (GPEs) based on electrospun membranes of poly(vinylidene fluoride-co-hexafluoropropylene) [P(VdF-co-HFP)] incorporating room temperature ionic liquids (RTILs), 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide complexed with lithium bis(trifluoromethylsulfonyl) inside (LiTFSI) as electrolytes have been prepared and their fundamental electrochemical properties were investigated. The morphology of electrospun membranes was examined by a field emission scanning electron microscope (FE-SEM). The membranes show uniform morphology with an average fiber diameter of 780 nm, high porosity and high electrolyte uptake. GPEs were prepared by soaking the electrospun membranes in 1 M LiTFSI in RTILs for 1 h and exhibit a high ionic conductivity of 2.4 x 10(-3)-4.5 x 10(-3) S cm(-1) at 25 degrees C. A Li/GPEs/LiFePO4 cell using these RTILs delivers high discharge capacity (similar to 140 mAh g(-1)) when evaluated at 25 degrees C at 0.1 C-rate and exhibits a very stable discharge capacity under continuous cycling. Among the GPEs, EMITFSI shows the highest electrochemical properties although the solid electrolyte interface (SEI) layer was not formed.

Zhao, X.Gyeongsang National University (author)
Choi, H.Gyeongsang National University (author)
Lim, Du Hyun,1983Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)duhyun (author)
Kim, Jae-Kwang,1978Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)jaekwang (author)
Matic, Aleksandar,1968Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)matic (author)
Jacobsson, Per,1958Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)pjacob (author)
Nah, C.Chonbuk National University (author)
Ahn, J. H.Gyeongsang National University (author)
Gyeongsang National UniversityChalmers tekniska högskola (creator_code:org_t)

By the author/editor: Raghavan, P.; Zhao, X.; Choi, H.; Lim, Du Hyun, 19 ...; Kim, Jae-Kwang, ...; Matic, Aleksanda ...; show more...; Jacobsson, Per, ...; Nah, C.; Ahn, J. H.; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Condensed Matter ...

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