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

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

476
views

0
downloads

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

Suggestions

OpenMETU
Core

Novel structured gadolinium doped ceria based electrolytes for intermediate temperature solid oxide fuel cells Timurkutluk, Bora; Timurkutluk, Cigdem; MAT, MAHMUT DURSUN; Kaplan, Yuksel (Elsevier BV, 2011-11-15) Novel three-layered intermediate temperature solid oxide fuel cell (SOFC) electrolytes based on gadolinium doped ceria (GDC) are developed to suppress the electronic conductivity of GDC, to improve the mechanical properties of the cell and to minimize power loss due to mixed conductive nature of GDC. Three different electrolytes are fabricated by sandwiching thin YSZ. ScSZ and ScCeSZ between two relatively thick GDC layers. An electrolyte composed of pure GDC is also manufactured for comparison. NiO/GDC and...
Photogalvanic effect in aqueous Methylene blue nickel mesh systems: Conversion of light into electricity Bayer, IS; Eroğlu, İnci; Turker, L (Wiley, 2001-03-10) The photogalvanic effect in electrochemical cells, employing aqueous Methylene blue and Fe(II)/Fe(III) couple electrolyte and nickel-mesh electrodes, were experimentally investigated. Five different standard H-cell configurations were set-up by modifying the electrolyte. Long-term open-circuit Voltage measurements were conducted in order to test the stability of the cells. Light on-off reproducibility experiments were also carried out during lengthy cell operations. By comparing experimental quantum yield w...
Kinetics of hydrogen generation from hydrolysis of sodium borohydride on Pt/C catalyst in a flow reactor Boran, Asli; Erkan, Serdar; Özkar, Saim; Eroglu, Inci (Wiley, 2013-04-01) Here, we report the results of a kinetic study on the hydrogen generation from the catalytic hydrolysis of sodium borohydride in a differential flow reactor. As catalyst platinum supported on carbon (Pt/C) was used in two forms: either as powder or coated on carbon cloth. For optimization of the system several parameters such as sodium hydroxide concentration, sodium borohydride concentration and the flow rate of the feed solution were varied. It was found that the H2 generation rate increases with an incre...
Comparative study of PV/PEM fuel cell hybrid energy system based on methanol and water electrolysis Budak, Yagmur; DEVRİM, YILSER (Elsevier BV, 2019-01-01) In this study, we investigated the comparative analysis of a solar-fuel cell hybrid system based on water and methanol electrolysis. The proposed system comprises PV, electrolyzer and proton exchange membrane fuel cell (PEMFC). The hybrid system is designed to supply the hydrogen (H-2) needed of the PEMFC system and also to fulfill the H-2 requirement of other applications. The actual data of solar irradiation of Izmir, Turkey are used in the simulation. The methanol and water electrolyzers were designed fo...
Experimental investigation of CO tolerance in high temperature PEM fuel cells DEVRİM, YILSER; Albostan, Ayhan; Devrim, Huseyin (Elsevier BV, 2018-10-04) In the present work, the effect of operating a high temperature proton exchange membrane fuel cell (HT-PEMFC) with different reactant gases has been investigated throughout performance tests. Also, the effects of temperature on the performance of a HT-PEMFC were analyzed at varying temperatures, ranging from 140 degrees C to 200 degrees C. Increasing the operating temperature of the cell increases the performance of the HT-PEMFC. The optimum operating temperature was determined to be 160 degrees C due to th...

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.