Stretchable Capacitor Electrode Using Multi-Directional Wrinkles
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Solution Overview
Problem
Conventional carbon nanotube electrodes and conductors are prone to breaking when repeatedly stretched in different directions, limiting their strain tolerance and durability in stretchable electronic devices.
Innovation Solution
A method involving a pre-stretched elastic substrate with a carbon nanotube active material composite layer, where the substrate is pre-stretched in multiple directions to form wrinkles, enhancing the structural integrity and resistance of the stretchable capacitor electrode-conductor structure, allowing it to maintain stability under large strain and repeated deformations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional carbon nanotube electrodes and conductors are stretched in multiple directions, then the stretchable electronic device achieves multi-directional flexibility, but the carbon nanotube structure breaks easily under repeated deformation
Solution Approach 1:
The carbon nanotube film is segmented into multiple layers with different alignment directions. Each layer contains carbon nanotubes aligned in a specific direction, and the stacking of multiple layers with different orientations enables the structure to withstand stretching in multiple directions without breaking, resolving the contradiction between multi-directional flexibility and strain tolerance.
Solution Approach 2:
The invention uses a composite structure consisting of multiple carbon nanotube film layers with different alignments, forming a multi-layered composite material. This composite structure combines the advantages of different directional alignments, allowing the electrode-conductor structure to maintain both multi-directional flexibility and high reliability under repeated deformations.
2Strength
If carbon nanotube films are stretched with small stress in a single direction, then the structure maintains integrity, but the stretchable device cannot withstand large strain or repeated deformations in different directions
Solution Approach 1:
The carbon nanotube film is segmented into multiple layers with different alignment directions. Each layer contains carbon nanotubes aligned in a specific direction, and the stacking of multiple layers with different orientations enables the structure to withstand stretching in multiple directions without breaking, resolving the contradiction between multi-directional flexibility and strain tolerance.
Solution Approach 2:
The invention transitions from a single-layer, single-direction alignment to a multi-layer structure with carbon nanotubes aligned in different directions. This dimensional change from one-dimensional alignment to three-dimensional multi-directional arrangement enables the structure to accommodate complex deformation patterns while maintaining structural integrity.
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 approach significantly improves the strain-bearing ability and resistance stability of the stretchable capacitor electrode-conductor structure, enabling it to withstand repeated stretching in various directions without breaking, with reversible deformation and maintained integrity.
Implementation Method 1
providing an elastic substrate, and pre-stretching the elastic substrate along a first direction and a second direction intersecting with the first direction
Data Source
AI summary
A stretchable capacitor electrode-conductor structure includes a capacitor electrode and a conductor structure forming an integrated molding. The capacitor electrode includes a plurality of carbon nanotube layers, and an active substance layer is located between adjacent carbon nanotube layers. Both the carbon nanotube layer and the conductor structure include a plurality of super-aligned carbon nanotube films. A surface of the stretchable capacitor electrode-conductor structure comprises a plurality of wrinkles. A stretchable supercapacitor including the stretchable capacitor electrode-conductor structure is also provided.