Embedded Electrodes in Transformable Devices
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Solution Overview
Problem
Existing transformable devices with electro-active polymer layers face challenges in maintaining electrode performance and longevity due to damage from repeated transformations, and require complex manufacturing processes and additional layers like adhesives and shielding, which increase thickness and cost.
Innovation Solution
A transformable device with electrodes embedded inside the electro-active layer, formed by injecting conductive materials and precipitating them within the layer, allowing for increased Maxwell Stress and reduced thickness without external adhesives or shielding layers, using a method that includes natural and chemical precipitation and controlled hardening to maintain electrode performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If electrodes are formed on the outer surface of the electro-active layer, then the device structure is simpler, but the electrode performance deteriorates due to damage from repeated transformations
Solution Approach 1:
The electrode is embedded inside the electro-active layer rather than being placed on the outer surface. This nesting approach protects the electrode from mechanical damage during repeated transformations while maintaining device functionality. The conductive material is incorporated within the bulk of the electro-active layer, shielding it from external stress and deformation.
Solution Approach 2:
The electro-active layer material surrounds the embedded electrode, providing protective cushioning before damage can occur. This pre-positioned protective layer absorbs and distributes mechanical stress during transformation cycles, preventing electrode degradation from the outset.
2Reliability
If external support layers (adhesives and shielding) are added to protect electrodes, then electrode reliability improves, but device thickness increases
Solution Approach 1:
The protective function and the electro-active layer itself are merged into a single integrated structure. The electro-active layer simultaneously serves as the functional material for transformation and as the protective medium for the embedded electrode, eliminating the need for separate adhesive and shielding layers.
Solution Approach 2:
The electro-active layer performs multiple functions: it provides the transformation capability through its electro-active properties, embeds and protects the electrode, and eliminates the need for separate support structures. This multi-functionality reduces overall device thickness while maintaining electrode reliability.
3Reliability
If multiple external layers (adhesives, shielding) are added to support electrodes, then electrode stability improves, but manufacturing complexity increases
Solution Approach 1:
The manufacturing process combines electrode formation and electro-active layer formation into a single integrated process. The conductive material is mixed with or embedded in the electro-active layer material before curing, eliminating the need for separate steps to apply adhesives and shielding layers.
Solution Approach 2:
The electrode is prepared and embedded within the electro-active layer material before the layer is cured or finalized. This preliminary embedding ensures electrode stability is built into the structure from the beginning, avoiding the need for subsequent protective layer applications.
4Duration of action of stationary object
If electrodes are embedded inside the electro-active layer, then electrode longevity improves, but manufacturing precision requirements increase
Solution Approach 1:
The manufacturing approach changes from precise post-formation electrode placement to mixing conductive material with electro-active layer material at controlled concentrations. This parameter change from positional precision to compositional control simplifies the manufacturing process while ensuring proper electrode distribution and functionality.
Solution Approach 2:
The conductive material is distributed throughout the electro-active layer with appropriate local concentration. This ensures that electrode regions have sufficient conductivity while maintaining the overall structural integrity and transformation properties of the electro-active layer.
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 embedded electrodes maintain performance and extend the life of the device by increasing Maxwell Stress while reducing manufacturing complexity and device thickness, enabling flexible and efficient transformation without external support layers.
Implementation Method 1
formed by injecting conductive materials and precipitating them within the layer
Implementation Method 2
Maxwell Stress is applied to the electro-active layer by electrostatic attractive force (coulombic force) generated among the accumulated charges
Implementation Method 3
An electro-active polymer (EAP) is a polymer which is transformable by electrical stimulation, and means a polymer which can be repeatedly expanded, contracted, and bent by electrical stimulation
Data Source
AI summary
A transformable device is provided. The transformable device includes an electro-active layer. A first electrode is disposed at a lower portion inside the electro-active layer. A second electrode is disposed at an upper portion inside the electro-active layer. In the transformable device according to an embodiment of the present disclosure, performance of the electrodes is suppressed from decreasing in spite of repeated operating and a life of the transformable device can be increased as compared with a case of forming electrodes outside an electro-active layer.