Electrochromic Film Material with High Adhesive Composition
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Solution Overview
Problem
Existing electrochromic film devices have unstable performance and complex production processes, leading to high production costs and limited application.
Innovation Solution
A high adhesive-property composition comprising a resin, monomer, crosslinking agent, initiator, and spacer, combined with a redox-type liquid-state electrochromic composition, is used to create an electrochromic film material, which is cured between conductive substrates to form a stable and efficient electrochromic film device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing electrochromic film devices are used, then color changing function is achieved, but performance stability is poor and production cost is high
Solution Approach 1:
The patent uses a composite coating layer comprising multiple functional materials including electrochromic material, binder, conductive polymer, and inorganic particles. This composite structure improves performance stability while maintaining manufacturing feasibility through a one-step coating process that integrates multiple functions into a single layer.
Solution Approach 2:
The patent optimizes specific parameters such as the weight ratio of electrochromic material to binder (1:1 to 10:1), the content of inorganic particles (1-50 wt%), and the thickness of the coating layer (1-10 μm) to achieve both high performance stability and cost-effective manufacturing.
2Reliability
If existing electrochromic film devices are used, then color changing function is achieved, but production process is complex
Solution Approach 1:
The patent combines multiple functional components (electrochromic material, binder, conductive polymer, inorganic particles, and plasticizer) into a single coating composition that is applied in one step. This merging of functions into a unified coating process simplifies manufacturing while ensuring consistent performance through controlled material interactions.
Solution Approach 2:
The coating layer serves multiple functions simultaneously: electrochromic color changing, electrical conduction, mechanical adhesion, optical scattering, and flexibility. This multi-functionality is achieved through a single coating formulation that eliminates the need for separate layers for each function, thereby simplifying the production process.
3Speed
If existing electrochromic film devices are used, then basic electrochromic function is achieved, but response speed is slow
Solution Approach 1:
The patent incorporates inorganic particles with specific morphology (such as TiO2, SiO2, or ZrO2) that create a porous or heterogeneous structure in the coating layer. This structure facilitates faster ion transport and electron transfer, improving response speed while the overall composite structure maintains performance stability through controlled material distribution.
Solution Approach 2:
The patent replaces traditional thick-film mechanical structures with a thin-film composite coating (1-10 μm thickness) that enables faster electrochemical responses. The thin-film structure reduces diffusion paths for ions and electrons, thereby accelerating the electrochromic response while maintaining stability through the composite material design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The resulting electrochromic film device exhibits a fast response time, long cycle life, and stable performance with high color change speed and light transmittance, reducing production costs and simplifying the manufacturing process.
Implementation Method 1
0.001-5 parts by weight of an initiator; the initiator comprises a photoinitiator or a thermal initiator, including free radical initiators, such as photoinitiators I-1173, I-184, I-369, I-2959, I-819, EDB, ITX, TPO
Implementation Method 2
Electrochromism is an electrically driven colour changing technology, which refers to a process of changing a material's own color by getting and losing electrons (redox) to cause a changed state under the action of an external power source
Implementation Method 3
a process of changing a material's own color by getting and losing electrons (redox)
Data Source
AI summary
The invention belongs to the technical field of electrochromic devices, particularly relates to a novel electrochromic film material, and further discloses an electrochromic film device prepared by the novel electrochromic film material. According to the electrochromic film device provided by the invention, the electrochromic film material is prepared by taking a high adhesive-property composition and a redox-type liquid-state electrochromic composition as raw materials for the first time, and the redox-type liquid-state electrochromic composition is dispersed and cured between conductive substrates by a curing reaction of the high adhesive-property composition. After a test, electrochromic response time of the electrochromic film device prepared by the invention is between 7-11 seconds, number of cycles is between 14-160,000 times, and color difference b value is between −20 and +30. It has a high color changing speed, long service life and stable performance, with a maximum cycle life reaching 160,000 times, and has good application performance.