TITLE

Contrast Enhancement in Polymeric Electrochromic Devices Encompassing Room Temperature Ionic Liquids

AUTHOR(S)
Zanarini, Simone; Garino, Nadia; Ravi Nair, Jijeesh; Francia, Carlotta; Jerzy Wojcik, Pawel; Pereira, Luis; Fortunato, Elvira; Martins, Rodrigo; Bodoardo, Silvia; Penazzi, Nerino
PUB. DATE
April 2014
SOURCE
International Journal of Electrochemical Science;Apr2014, Vol. 9 Issue 4, p1650
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report the preparation and spectro-electrochemical characterization of electrochromic devices (ECD) combining inkjet-printed WO3 as cathode and electro-deposited V2O5 as anode. ECD were prepared for the first time with an optimized formulation of gel polymer electrolyte based on Bisphenol A ethoxylate dimethacrylate and Poly(ethylene glycol) methyl ether methacrylate (BEMA/PEGMA) encompassing the Room Temperature Ionic Liquid (RTIL, 1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide) as solvent. The UV-VIS spectrum of ECD was recorded at different potentials during Li+ insertion and de-insertion; additionally the Percent Trasmittance (T%) of ECD vs. time was investigated during repeated bleaching and coloring cycles allowing thus the estimation of switching times and device stability. Due to the lower ionic conductivity and the apparent superior solvent permeability within WO3 active layer, RTIL containing ECD showed slower switching times, but higher contrast with respect to the similar ones with EC/DEC as solvent. These results indicate that the ECD containing environment-friendly RTIL electrolytes are suitable for applications requiring high contrast, high safety and moderately fast switching times.
ACCESSION #
94967160

 

Related Articles

  • Electrochemical Methods for Post-Mortem Failure Analysis of Commercial PEM Fuel Cell Stacks. Smit, Mascha A.; Yildirim, H.; Mulder, M. J. J.; de Bruijn, F. A. // International Journal of Electrochemical Science;Nov2013, Vol. 8 Issue 11, p12116 

    A combination of electrochemical methods was used to determine failure modes of commercial stacks, run under unknown customer-dependent operational conditions. In this specific case, post-mortem analysis was applied to a commercial 4 kW PEM fuel cell stack. Selected MEAs from this stack were...

  • A Convergent Electrosynthesis for Chlorine Dioxide. Ibanez, Jorge G.; Gomez-Gonzalez, Alejandro; Vasquez-Medrano, Ruben C.; Paramo-Garcia, Ulises; Zavala-Araiza, Daniel // International Journal of Electrochemical Science;Nov2013, Vol. 8 Issue 11, p12097 

    A promising approach in green electrochemistry involves the minimization of energy expenditure through the design of systems performing useful reactions at both electrodes of an electrosynthetic cell (i.e., simultaneous processes). A proof-of-concept for the rather unusual simultaneous...

  • Platinum Electrodeposition in an Ionic Liquid Analogue. Solvent Stability Monitoring. Gómez, E.; Vallés, E. // International Journal of Electrochemical Science;Jan2013, Vol. 8 Issue 1, p1443 

    The use of ionic liquid analogues as solvents has increased in order to substitute the aqueous solvents in some applications in which the side reactions are undesirable. However these solvents prepared from the mixture in the eutectic proportion of species establishing hydrogen bonds are...

  • Nano Focus: Electrolyte-free electrochromic device fabricated using graphene quantum dot-viologen nanocomposites. Sesuraj, Rufina S.A. // MRS Bulletin;Oct2014, Vol. 39 Issue 10, p839 

    The article discusses a study by E. Hwang, H. (Hanleem) Lee, and colleagues from Sungkyunkwan University, South Korea on electrolyte-free electrochromic devices (ECDs) using graphene quantum dot-viologen nanocomposites. Topics include the use of electrolytes in ECD system might lead to unwanted...

  • Comparative Investigation of Organic Solution and Ionic Liquid as Electrolyte under Lithium-Air Battery. Kedi Cai; Haijing Jiang; Weihua Pu // International Journal of Electrochemical Science;2014, Vol. 9 Issue 6, p390 

    In this study, we compared the performance and cycle life of lithium-air battery with organic solution and ionic liquid as electrolyte, respectively. The electrochemical performance of the electrolyte was examined using Tafel curves, cyclic voltammetry, and the constant current discharge tests....

  • Electrochemical Study of the Supported Bilayer Lipid Membrane Doped with Ionic Liquids and the Direct Electron Transfer of Embed Laccase. QIAOQIAO REN; SONG DONG; JIUYANG WU; FENFEN LI; JIGEN MIAO // Asian Journal of Chemistry;2012, Vol. 24 Issue 11, p5377 

    The electrochemical behaviour of ionic liquids doped supported bilayer lipid membrane on glassy carbon electrode was studied by cyclic voltammetry. The assembled supported bilayer lipid membrane/ionic liquids films exhibited good electrochemical performance. The direct electron transfer of...

  • Electrocatalytic Carboxylation of Benzoyl Bromide with CO2 in Ionic Liquid 1-Butyl-3-Methyllimidazoliumtetrafluoborate to Methyl phenyl glyoxylate. QIUJU FENG; GUISHAN TAN; YUANJIAN LI; WENBIN ZENG; WENBIN YAN // Asian Journal of Chemistry;2014, Vol. 26 Issue 11, p3241 

    A new electrochemical procedure for the electrocatalytic carboxylation of benzoyl bromide with CO2 in ionic liquid, 1-butyl-3-methyllimidazolium tetrafluoborate (BMIMBF4), to methyl phenyl glyoxylate was investigated. The experiments were carried out in three electrodes undivided cell under mild...

  • Electrochemical Studies of Tin in the non-Cl- [EMIm]BF4 Room Temperature Ionic Liquid. HUI CANG; WENYAN SHI; JINGLING SHAO; QI XU // Asian Journal of Chemistry;2012, Vol. 24 Issue 7, p3028 

    The electrochemistry of tin at platinum and glass carbon electrode was studied in the non-Cl- [EMIm]BF4 ionic liquid at ambient temperature. The formal potential of the Sn(II)/Sn couple in the non-Cl- [EMIm]BF4 is -0.64V vs. Ag/Ag(I). The results of cyclic voltammograms indicated that the...

  • Effect of Conducting Salts in Ionic Liquid based Electrolytes: Viscosity, Conductivity, and Li-Ion Cell Studies. Hofmann, Andreas; Schulz, Michael; Hanemann, Thomas // International Journal of Electrochemical Science;Aug2013, Vol. 8 Issue 8, p10170 

    A series of five conducting salts in a liquid electrolyte mixture based on propylene carbonate and N,N-diethyl-N-methyl-N-(2-methoxyethyl)ammonium bis(trifluoromethanesulfonyl)azanide is studied with respect to the usability in Li-ion cells. Namely, LiBF4, LiOSO2CF3, LiClO4, LiPF6, and lithium...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics