Electrochromic device based on reversible double electrodeposition and application thereof

By introducing an electrolyte layer of manganese salt, zinc salt and redox medium into the electrochromic device and utilizing the reversible reaction of zinc ions, the narrow dimming range and non-neutral color problems of traditional devices are solved, and efficient electrochromic performance and long life are achieved, which is suitable for the fields of dynamic dimming and visual camouflage.

CN120802539APending Publication Date: 2025-10-17SHANDONG UNIV +1
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Patent Information

Application Number
CN202510671680.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-23
Publication Date
2025-10-17

AI Technical Summary

Technical Problem

Traditional reversible manganese dioxide deposition/dissolution electrochromic devices have problems such as narrow dimming range, non-neutral color and corrosion of transparent conductive substrate.

Method used

An electrochromic device based on reversible double electrodeposition is used, using an electrolyte layer of manganese salt, zinc salt and redox medium. Through the reversible deposition/dissolution reaction of zinc ions, combined with a gelling agent to form a gel state, the dimming range is broadened and neutral colors are obtained.

Benefits of technology

The device has achieved a wider dimming range, high output voltage, high energy density, fast color change speed, and long cycle life, avoiding corrosion of the transparent conductive substrate, and has commercial potential.

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Abstract

The invention belongs to the field of light modulators, and provides an electrochromic device based on reversible double electrodeposition and application of the electrochromic device. The electrochromic device sequentially comprises a first transparent substrate, a first conductive layer, an electrolyte layer, a second conductive layer and a second transparent substrate; the electrolyte layer comprises a solvent and an electrolyte additive, and the electrolyte additive comprises a manganese salt, a zinc salt and a redox medium. And the charge change in the manganese ion deposition / dissolution process is compensated through the reversible deposition / dissolution reaction of zinc ions in the electrolyte. In the coloring process, manganese ions are subjected to oxidation reaction on the surface of the first transparent conductive substrate to form manganese dioxide sediment; meanwhile, the zinc ions are subjected to reduction reaction on the surface of the second transparent conductive substrate to form metal zinc. And in the fading process, the sediment is dissolved, so that the device is recovered to the initial transparent state. In addition, dissolution of manganese dioxide and metal zinc can be accelerated by adding the oxidation-reduction medium, and the reaction kinetics of the device is improved.
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Citation Information

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