Metal oxide-mixed polymer-based hybrid electrochromic supercapacitor

improved efficiency and dual band switching

authored by

Bhumika Sahu, Love Bansal, Tanushree Ghosh, Suchita Kandpal, Deb Kumar Rath, Chanchal Rani, Christoph Wesemann, Nadja C. Bigall, Rajesh Kumar

Abstract

The inclusion of charge storage properties in electrochromic devices (ECDs) has gained much interest and has evolved into a promising emerging energy-related field due to multifunctional smart device applications. Here, an organic-inorganic solid-state asymmetric electrochromic supercapacitor device (ESCD) containing nano-CoTiO₃-mixed poly-3-hexylthiophene and WO₃ as two electrodes has been designed to study electrochromic and supercapacitor properties. The electrochemical properties of CoTiO₃ show a pseudocapacitive-type charge storage capability, which has been utilized to enhance the electrochromic performance of the ESCD with additional charge storage ability. The device shows charge storage properties with fast charging and slow discharging, giving very high coulombic efficiency with a specific capacitance of 6.4 mF cm⁻² at 0.2 mA cm⁻² current density. The device shows excellent electrochromic supercapacitive properties with a color contrast of ∼50% and a short switching time of ∼1 s at a 515 nm wavelength with excellent cyclic stability. The device exhibits the capability to cut near infrared wavelength (700 nm and 850 nm) and has a potential application as a heat filtering device. Thus, the addition of pseudocapacitive-type materials in ECDs enhances the capacitive performance along with electrochromic properties, which makes ECDs more suitable for real life applications.

Organisation(s)

Institute of Physical Chemistry and Electrochemistry
PhoenixD: Photonics, Optics, and Engineering - Innovation Across Disciplines

External Organisation(s)

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

Type

Article

Journal

Journal of Physics D: Applied Physics

Volume

57

No. of pages

14

ISSN

0022-3727

Publication date

21.03.2024

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Acoustics and Ultrasonics, Surfaces, Coatings and Films

Electronic version(s)

https://doi.org/10.1088/1361-6463/ad2dba (Access: Closed)