Nano Aerogel-Based VIS-NIR Switchable Electrochromic Supercapacitor

Energy Storage and Heat-Shielding Device

verfasst von

Love Bansal, Franziska Lübkemann-Warwas, Bhumika Sahu, Tanushree Ghosh, Suchita Kandpal, Chanchal Rani, Deb Kumar Rath, Lasse Prawitt, Christoph Wesemann, Nadja C. Bigall, Rajesh Kumar

Abstract

Power-efficient electrochromic devices that can exhibit multifunctional applications, especially in the areas of energy storage and savings, are increasingly in demand. Here, an inorganic-organic electrochromic smart window has been designed in which a self-supporting aerogel-type network of tin-doped indium oxide (a-ITO) nanoparticles was doped to enable applications in supercapacitive energy storage. The devices based on poly(3-hexylthiophene-2,5-diyl) (doped with incorporated a-ITO) and viologen exhibit bias-induced color modulation in the visible and infrared range. This function can be employed to prevent the transmission of latter radiation to maintain a temperature difference on the two sides of the device when it is turned ON with a bias voltage of 1.6 V. The device exhibits an electrochromic supercapacitor property with a maximum coloration efficiency of 966 cm²/C with a switching time of only 0.5 s, color contrast of 61%, and high specific capacitance of 17 F/g. Potential applications of the device in temperature shielding are discussed, and a maximum cooling efficiency of 32% is demonstrated. Overall, a recipe is developed to design energy-storing and energy-saving multicolor-switchable smart windows for application in designing energy-efficient smart windows/buildings.

Organisationseinheit(en)

Institut für Physikalische Chemie und Elektrochemie
PhoenixD: Simulation, Fabrikation und Anwendung optischer Systeme

Externe Organisation(en)

Indian Institute of Technology Indore (IITI)
University of Toronto
Cornell University
University of Michigan
Universität Hamburg

Typ

Artikel

Journal

ACS Applied Materials and Interfaces

Band

17

Seiten

31201–31211

Anzahl der Seiten

11

ISSN

1944-8244

Publikationsdatum

28.05.2025

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Allgemeine Materialwissenschaften

Elektronische Version(en)

https://doi.org/10.1021/acsami.4c22928 (Zugang: Geschlossen)