• English
  • Deutsch
  • Log In
    Password Login
    Research Outputs
    Fundings & Projects
    Researchers
    Institutes
    Statistics
Repository logo
Fraunhofer-Gesellschaft
  1. Home
  2. Fraunhofer-Gesellschaft
  3. Artikel
  4. Charge balancing and optical contrast optimization in Fe-MEPE/Ni1-xO electrochromic devices containing a Li reference electrode
 
  • Details
  • Full
Options
2021
Journal Article
Title

Charge balancing and optical contrast optimization in Fe-MEPE/Ni1-xO electrochromic devices containing a Li reference electrode

Abstract
A three-electrode cell setup enables to evaluate the redox behavior of both electrodes, i.e., iron-based metallopolymers (Fe-MEPE) and a complementary switching non-stoichiometric nickel oxide (Ni1-xO, multilayer structure), in detail during full cell operation. In this work, electrochromic devices (ECDs) with a Li reference electrode and different charge density ratios between the electrode materials have been studied (spectro-)electrochemically. The charge density ratio between the electrodes affects the cell voltage, optical contrast, response time, and cycling stability. Here, a neutral-colored bright state was obtained for the unbalanced configuration (ECD-1, charge density ratio Fe-MEPE:Ni1-xO_2 = 2:1, underbalanced) and the balanced configuration (ECD-2, charge density ratio Fe-MEPE:Ni1-xO_3 = 1:1, balanced). The operating voltage range of the ECDs can be narrowed by using a balanced or overbalanced Ni1-xO electrode, e.g., 1.5 V ↔ -1 V for ECD-3 (charge density ratio Fe-MEPE:Ni1-xO_5 = 1:3, overbalanced). Moreover, the cycling stability is enhanced from just a few cycles (ECD-1) to over 1000 potentiostatic switching cycles (ECD-2 and ECD-3).
Author(s)
Niklaus, Lukas  
Fraunhofer-Institut für Silicatforschung ISC  
Schott, Marco  
Fraunhofer-Institut für Silicatforschung ISC  
Posset, Uwe  
Fraunhofer-Institut für Silicatforschung ISC  
Mihelcic, Mohor
University of Ljubljana, Faculty for Mechanical Engineering, Laboratory of Experimental Mechanics, Ljubljana, Slovenia
Jerman, Ivan
National Institute of Chemistry NIC, Ljubljana, Slovenia
Giffin, Guinevere A.
Fraunhofer-Institut für Silicatforschung ISC  
Journal
Solar energy materials and solar cells  
DOI
10.1016/j.solmat.2021.111080
Language
English
Fraunhofer-Institut für Silicatforschung ISC  
Keyword(s)
  • electrochromic device

  • metallopolymers

  • non-stoichiometric nickel oxide

  • reference electrode

  • charge balancing

  • Cookie settings
  • Imprint
  • Privacy policy
  • Api
  • Contact
© 2024