A Reversible MnO2 Deposition‐Enabled Multicolor Electrochromic Device with Efficient Tunability of Ultraviolet–Visible Light

Author:

Wang Jinhui1ORCID,Zhou Yiping1,Lv Ying1,Feng Ji‐fei1,Wang Zhuanpei1,Cai Guofa1ORCID

Affiliation:

1. Key Laboratory for Special Functional Materials of Ministry of Education National & Local Joint Engineering Research Center for High‐efficiency Display and Lighting Technology School of Materials Science and Engineering and Collaborative Innovation Center of Nano Functional Materials and Applications Henan University Kaifeng 475004 China

Abstract

AbstractElectrochromic technology offers exciting opportunities for smart applications such as energy‐saving and interactive systems. However, achieving dual‐band regulation together with the multicolor function is still an unmet challenge for electrochromic devices. Herein, an ingenious electrochromic strategy based on reversible manganese oxide (MnO2) electrodeposition, different from traditional ion intercalation/deintercalation‐type electrochromic materials is proposed. Such a deposition/dissolution‐based MnO2 brings an intriguing electrochromic feature of dual‐band regulation for the ultraviolet (UV) and visible lights with high optical modulation (93.2% and 93.6% at 400 and 550 nm, respectively) and remarkable optical memory. Moreover, a demonstrative smart window assembled by MnO2 and Cu electrodes delivers the electrochromic properties of effective dual‐band regulation accompanied by multicolor changes (transparent, yellow, and brown). The robust redox deposition/dissolution process endows the MnO2‐based electrochromic device with excellent rate capability and an areal capacity of 570 mAh m−2 at 0.1 mA cm−2. It is believed that the metal oxide‐based reversible electrodeposition strategy would be an attractive and promising electrochromic technology and provide a train of thought for the development of multifunctional electrochromic devices and applications.

Funder

National Natural Science Foundation of China

China Postdoctoral Science Foundation

Henan Postdoctoral Science Foundation

Natural Science Foundation of Henan Province

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

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