An Ultrafast, Energy‐Efficient Electrochromic and Thermochromic Device for Smart Windows

Author:

Deng Bin1ORCID,Zhu Yanan2,Wang Xiaowei1,Zhu Jinlin1,Liu Manyu1,Liu Mingqiang3,He Yaowu1,Zhu Caizhen4,Zhang Chaohong1ORCID,Meng Hong1ORCID

Affiliation:

1. School of Advanced Materials Peking University Shenzhen Graduate School Peking University Shenzhen 518055 China

2. Faculty of Materials Science Shenzhen MSU‐BIT University Shenzhen 518172 China

3. Electrochemical Innovation Lab University College London London WC1E7JE UK

4. Institute of Low‐Dimensional Materials Genome Initiative College of Chemistry and Environmental Engineering Shenzhen University Shenzhen 518060 China

Abstract

AbstractSmart windows nowadays undertake the esteemed obligation of reducing energy consumption as well as upgrading living experience. This project aims to devise a smart window that responds to both electricity and heat, with the intention of achieving energy efficiency, privacy preservation, and enhanced decorative attributes. Through the implementation of a novel electrochromic material design, coupled with the optimization of electrochromic devices (ECDs), a high‐performance ECD is obtained, demonstrating coloring/bleaching time of 0.53/0.16 s, a transmittance modulation of 78% (from 99% to 21%), and superior performance in six dimensions. Furthermore, temperature‐responsive units and an ionic liquid are incorporated into the electrolyte system to create a novel thermochromic gel electrolyte with transmittance modulation from 80% to 0%, and excellent thermal insulation (6.4 °C reduction). Ultimately, an electro‐ and thermochromic device is developed, featuring an ultrafast color‐switching speed of 0.82/0.60 s and multiple working modes. Overall, this work showcases a prospective design pathway for the development of next‐generation ultrafast‐switching, and energy‐efficient intelligent windows.

Funder

National Natural Science Foundation of China

Shenzhen Fundamental Research Program

Publisher

Wiley

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

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