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

作　　者：Zekun Huang Yutao Peng Jing Zhao Shengliang Zhang Penglu Qi Xianlin Qu Fuqiang Yan Bing Ding Yimin Xuan Xiaogang Zhang 

机构地区：[1]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 [2]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 [3]Center for Microscopy and Analysis,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,People’s Republic of China

出　　处：《Nano-Micro Letters》2025年第4期419-434,共16页纳微快报(英文版)

基　　金：support from the National Natural Science Foundation of China(Grant No.62105148);China Postdoctoral Science Foundation(2022TQ0148 and 2023M731651);Postgraduate Research&Practice Innovation Program of NUAA(xcxjh20230609).

摘　　要：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℃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.

关 键 词：Electrochromic Dual-band electrochromic devices Spectral-selective modulation FLEXIBLE Energy storage 

分 类 号：TB34[一般工业技术—材料科学与工程]