Fast and Stable Zinc Anode-Based Electrochromic Displays Enabled by Bimetallically Doped Vanadate and Aqueous Zn2+/Na+ Hybrid Electrolytes

Highlights La 3+ /Na + bimetallically doped vanadate, designed for the first time, is promising in many electrochemical applications (e.g., batteries, electrochromics). This is the first report of electrochromic displays employing bimetallically doped vanadate. It is demonstrated for the first time...

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Bibliographic Details
Published in:Nano-micro letters 2023-12, Vol.15 (1), p.229-229, Article 229
Main Authors: Song, Zhaoyang, Wang, Bin, Zhang, Wu, Zhu, Qianqian, Elezzabi, Abdulhakem Y., Liu, Linhua, Yu, William W., Li, Haizeng
Format: Article
Language:English
Subjects:
Aqueous electrolytes
Bimetals
Displays
Dissolution
Electrochromic
Electrochromism
Electrolytes
Engineering
Hybrid electrolytes
Interlayers
Kinetics
Lanthanum
Nanoscale Science and Technology
Nanotechnology
Nanotechnology and Microengineering
Sodium
Switching
Vanadates
Zinc
Zn-based batteries
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Summary:Highlights La 3+ /Na + bimetallically doped vanadate, designed for the first time, is promising in many electrochemical applications (e.g., batteries, electrochromics). This is the first report of electrochromic displays employing bimetallically doped vanadate. It is demonstrated for the first time that zinc dendrites and vanadate dissolution are significantly inhibited by employing an aqueous hybrid Zn 2+ /Na + electrolyte. Vanadates are a class of the most promising electrochromic materials for displays as their multicolor characteristics. However, the slow switching times and vanadate dissolution issues of recently reported vanadates significantly hinder their diverse practical applications. Herein, novel strategies are developed to design electrochemically stable vanadates having rapid switching times. We show that the interlayer spacing is greatly broadened by introducing sodium and lanthanum ions into V 3 O 8 interlayers, which facilitates the transportation of cations and enhances the electrochemical kinetics. In addition, a hybrid Zn 2+ /Na + electrolyte is designed to inhibit vanadate dissolution while significantly accelerating electrochemical kinetics. As a result, our electrochromic displays yield the most rapid switching times in comparison with any reported Zn-vanadate electrochromic displays. It is envisioned that stable vanadate-based electrochromic displays having video speed switching are appearing on the near horizon.
ISSN:2311-6706
2150-5551
DOI:10.1007/s40820-023-01209-z