Enhanced capacitive behaviour of graphene based electrochemical double layer capacitors by etheric substitution on ionic liquids

Date

2020-08-01

Author

Siyahjani, Shirin
Oner, Saliha
Diker, Halide
GÜLTEKİN, BURAK
Varlikli, Canan

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In this study, we report the effect of etheric substituents in imidazolium and ammonium based ionic liquids (IL) on the performance of electrochemical double layer capacitors (EDLC) consisted of gel polymer electrolyte (GPE) and reduced graphene oxide (RGO) electrode. GPEs contain poly (vinylidene fluoride-hexafluompropylene) (PVDF-HFP) and the ILs. Ammonium and imidazolium based ionic liquids (ILs) differ by their length of etheric groups and etheric group contents, respectively. According to the cyclic voltammetry, galvanostatic chargedischarge and electrochemical impedance spectroscopy measurements, longer etheric group substituted {N-methyl-2- (2-methoxyethoxy)-N,N-bis [2- (2-methoxyethoxy)ethyl] ethan-1-aminium bis(tri-fluoromethanesulfonyl)imide (AMEt-TFSI) and ether substituted (3-allyl-1-[2-(2-methoxyethoxy)ethyl]-1H-imidazole-3-ium bis(trifluommethanesulfonyeimide (AL3IL-TFSI), tender specific capacitances of 250 Fg(-1) and 238 Fg(-1) and energy density values of 61.36 wh kg(-1) and 61.56 wh kg(-1), respectively.

Subject Keywords

Physical and Theoretical Chemistry, Renewable Energy, Sustainability and the Environment, Electrical and Electronic Engineering, Energy Engineering and Power Technology

URI

https://hdl.handle.net/11511/67889

Journal

JOURNAL OF POWER SOURCES

DOI

https://doi.org/10.1016/j.jpowsour.2020.228353

Collections

Natural Sciences and Mathematics, Article

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Citation Formats

S. Siyahjani, S. Oner, H. Diker, B. GÜLTEKİN, and C. Varlikli, “Enhanced capacitive behaviour of graphene based electrochemical double layer capacitors by etheric substitution on ionic liquids,” JOURNAL OF POWER SOURCES, pp. 0–0, 2020, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/67889.