Issue

Vol. 17 (2025)

An Efficient and Flexible Bifunctional Dual-Band Electrochromic Device Integrating with Energy Storage

https://doi.org/10.1007/s40820-024-01604-0
Zekun Huang
Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China
Yutao Peng
Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China
Jing Zhao
Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China
Shengliang Zhang
Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China
Penglu Qi
Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China
Xianlin Qu
Center for Microscopy and Analysis, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, People’s Republic of China
Fuqiang Yan
Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China
Bing Ding
Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China
Yimin Xuan
Key Laboratory of Thermal Management and Energy Utilization of Aviation Vehicles, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China
Xiaogang Zhang
Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China

Corresponding Author: Xiaogang Zhang

azhangxg@nuaa.edu.cn

Nano-Micro Letters, Vol. 17 (2025), Article Number: 98

Abstract

Dual-band electrochromic devices capable of the spectral-selective modulation of visible (VIS) light and near-infrared (NIR) can notably reduce the energy consumption of buildings and improve the occupants' visual and thermal comfort. However, the low optical modulation and poor durability of these devices severely limit its practical applications. Herein, we demonstrate an efficient and flexible bifunctional dual-band electrochromic device which not only shows excellent spectral-selective electrochromic performance with a high optical modulation and a long cycle life, but also displays a high capacitance and a high energy recycling efficiency of 51.4%, integrating energy-saving with energy-storage. The nanowires structure and abundant oxygen-vacancies of oxygen-deficient tungsten oxide nanowires endows it high flexibility and a high optical modulation of 73.1% and 85.3% at 633 and 1200 nm respectively. The prototype device assembled can modulate the VIS light and NIR independently and effectively through three distinct modes with a long cycle life (3.3% capacity loss after 10,000 cycles) and a high energy-saving performance (8.8 °C lower than the common glass). Furthermore, simulations also demonstrate that our device outperforms the commercial low-emissivity glass in terms of energy-saving in most climatic zones around the world. Such windows represent an intriguing potential technology to improve the building energy efficiency.


Highlights:
1 A flexible dual-band electrochromic device with a high optical modulation and a long cycle life was reported.
2 The device assembled can modulate the visible light and near-infrared independently and effectively, showing higher energy-saving performance than commercial low-emissivity glass in most climatic zones around the world.
3 The flexible device also shows good energy storage and energy recycling performances, recycling 51.4% of the energy consumed in the coloration process for local reusing.

Keywords

Electrochromic Dual-band electrochromic devices Spectral-selective modulation Flexible Energy storage
Huang, Zekun, Yutao Peng, Jing Zhao, Shengliang Zhang, Penglu Qi, Xianlin Qu, Fuqiang Yan, Bing Ding, Yimin Xuan, and Xiaogang Zhang. 2024. “An Efficient and Flexible Bifunctional Dual-Band Electrochromic Device Integrating With Energy Storage”. Nano-Micro Letters 17 (December):98. https://doi.org/10.1007/s40820-024-01604-0.
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