Ion-Paired Electrochromic Materials for Low Current Consumption
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Solution Overview
Problem
Existing electrochromic devices using non-ion-paired anodic and cathodic electrochromic compounds require higher currents for similar light transmission changes, limiting their efficiency and practical applications.
Innovation Solution
The development of an electrochromic medium and device incorporating ion-paired electrochromic materials, where cathodic and anodic compounds with balanced net charges are used in conjunction with a protic solvent-based liquid or gel, reducing the current required for light transmission changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If non-ion-paired anodic and cathodic electrochromic compounds are used, then the device can operate with simpler material requirements, but higher currents are required for similar light transmission changes
Solution Approach 1:
The patent combines ion-paired anodic and cathodic electrochromic compounds in a single electrochromic medium. The ion-paired compounds consist of counterions that balance the charges between the anodic and cathodic materials, enabling charge compensation without requiring high currents. This merging of functional components into a coordinated system resolves the contradiction by maintaining material simplicity while reducing energy consumption through efficient charge balancing.
2Use of energy by moving object
If ion-paired electrochromic materials are used, then current consumption is reduced for light transmission changes, but the material composition becomes more complex
Solution Approach 1:
The patent changes the chemical parameters of the electrochromic medium by introducing ion-paired compounds with specific counterions. The counterions are selected to balance the charges of the electrochromic compounds, and their concentrations are optimized to achieve low current consumption. This parameter change approach resolves the contradiction by systematically adjusting material composition to reduce energy requirements while managing complexity through controlled chemical design.
3Reliability
If protic solvent-based liquid or gel is used, then ion-paired electrochromic materials can function effectively, but the solvent selection and formulation become more restrictive
Solution Approach 1:
The patent applies local quality by selecting specific protic solvents that provide the necessary properties for ion-paired electrochromic material functionality. The protic solvent is chosen to ensure proper solubility, ionic conductivity, and electrochemical stability. This localized optimization of solvent properties resolves the contradiction by ensuring reliable material performance through targeted solvent selection while acknowledging the need for specific formulation requirements.
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 use of ion-paired electrochromic materials in a protic solvent-based electrochromic medium and device achieves lower current consumption for similar light transmission changes, enhancing efficiency and expanding application possibilities.
Implementation Method 1
electrochromic materials and devices that employ such materials
Data Source
Figure 1
AI summary
Protic-soluble electrochromic materials, ion-paired electrochromic materials including protic-soluble electrochromic materials, as well as electrochromic media and electrochromic devices incorporating such materials, are provided. The use of protic solvent mixtures, especially mixtures incorporating water, allows for the use of a wider variety of substrate materials. For example, plastics that may be soluble in organic aprotic solvent systems may be used in water-based devices.