Polymeric Electrolyte Sheet for Electrochromic Layer Compatibility
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Solution Overview
Problem
Existing electrochemical devices face challenges in achieving compatibility and durability between redox layers and electrolyte layers, particularly in maintaining a balanced concentration of plasticizers and salts, which affects ion transport and device functionality under varying conditions.
Innovation Solution
The use of polymeric compositions with matching plasticizers and salt concentrations in both redox and electrolyte layers, along with compatible polymer materials and perimeter sealants, ensures interfacial compatibility and durability, enhancing ion conductivity and optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plasticizers and salts are added to improve ion conductivity in electrolyte layers, then ion transport is enhanced, but compatibility and durability between redox layers and electrolyte layers deteriorate due to concentration imbalance
Solution Approach 1:
The patent applies parameter changes by precisely controlling the concentration of plasticizers and salts in both redox and electrolyte layers. Specifically, the plasticizer concentration is maintained at 10-50 wt% and salt concentration at 0.1-2.0 M in both layers, ensuring matched ionic strength and compatibility while achieving high ion conductivity
Solution Approach 2:
The patent uses homogeneity by employing identical plasticizer and salt compositions in both redox and electrolyte layers. This creates uniform chemical environments across interfaces, eliminating concentration gradients and ensuring stable, compatible operation between layers
2Duration of action of stationary object
If polymer materials are used to form solid electrolyte layers, then device durability is improved, but manufacturing complexity increases due to polymerization process requirements
Solution Approach 1:
The patent applies preliminary action by pre-synthesizing the polymeric electrolyte layer as a self-standing film before device assembly. The polymerization is completed in advance, creating a ready-to-use solid electrolyte membrane that simplifies the overall device manufacturing process
Solution Approach 2:
The patent uses segmentation by separating the electrolyte layer into a distinct polymeric film component that can be independently manufactured and then integrated into the electrochromic device. This modular approach simplifies the overall device structure and assembly process
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
This approach results in low-cost, high-performance, and durable electrochromic devices with improved adhesion, ion transport, and optical clarity, suitable for architectural and transportation applications, including smart windows and skylights.
Implementation Method 1
an electrolyte layer comprising a first polymer and a first plasticizer wherein the electrolyte layer is in contact with a redox layer comprising a second polymer and a second plasticizer, wherein the first and the second plasticizers are the same; and at least one monomer component of the first polymer and at least one monomer component of the second polymer are miscible with the first plasticizer and the second plasticizer
Implementation Method 2
a redox layer in contact with the conductive coating; and an electrolyte layer comprising a first polymer wherein the electrolyte layer is in contact with the redox layer
Data Source
AI summary
Methods and materials to fabricate electrochromic including electrochemical devices are disclosed. In particular, emphasis is placed on the composition, fabrication and incorporation of electrolytic sheets in these devices. Composition, fabrication and incorporation of redox materials and sealants suitable for these devices are also disclosed. Incorporation of EC devices in insulated glass system (IGU) windows is also disclosed.