BROWSE
Detail
Journal Article
Development of a novel WO3 self-powered electrochromic window technology with a self-rechargeable battery application (ChromoVolt)
- Authors
- Md Halim Hossain, Hojun Ryu
- Issue Date
- 2023-11
- Citation
- Energy Reports, v.10, pp.3780-3786
- ISSN
- 2352-4847
- Publisher
- Elsevier Limited
- Language
- English
- Type
- Journal Article
- Abstract
- For zero-energy buildings, electrochromic smart windows are one of the most essential components, but the external power demand makes this purpose ambiguous. Here, we report a self-powered electrochromic smart window (ECSW) operated by internal electrochemical voltage (chromoVolt). This WO3-based ECSW provides a unique structured device as the 2 mm width Al strip (counter electrode) is placed at one side, making the total window transparent from the front or back point. The WO3 working electrode was fabricated by the large-scale roll-to-roll (R2R) slot-die wet coating method. This device goes into coloured (blue) or bleached (transparent) states spontaneously simply by connecting and disconnecting WO3 and Al electrodes respectively. Going into a deep blue stable-colored state takes approximately 2 min and shows a maximum 56.5 % transmittance change at 600 nm wavelength. Also, this ECSW can provide output potential through internal chemical reactions in a transparent state and can be charged up through disconnection: a self-rechargeable transparent battery application. Three small cells of an active area of 30 mm × 15 mm each provide an output voltage of around 3 V and can power up a small white LED light for up to 1 h. All these phenomena make this electrochromic smart window perfect for a zero-energy building.
- KSP Keywords
- 1 H, 2 mm, 3 V, Active area, Al electrode, Deep blue, Electrochromic window, LED light, Output voltage, Power Demand, Rechargeable battery
This work is distributed under the term of Creative Commons License (CCL)
(CC BY NC ND)
(CC BY NC ND)
