Liquid Composition for Uniform Electrode Particle Layer Formation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electrochemical devices face challenges in forming a uniform particle layer on substrates with porous structures, leading to poor dispersion and aggregation of particles, which affects the performance and efficiency of the devices.
Innovation Solution
A liquid composition with specific properties, including a contact angle greater than that of the solvent, is used to improve the formation of a particle layer on both porous and non-porous substrates, utilizing particles and a solvent with controlled SPp values to enhance dispersion stability and prevent particle aggregation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a liquid composition including particles and solvent is applied to an electrode mixture layer, then a separator can be formed on the electrode, but the particles may aggregate and disperse poorly on porous substrates
Solution Approach 1:
The patent changes the contact angle parameter of the liquid composition by adjusting solvent selection and composition ratios. Specifically, it uses solvents with controlled polarity (SPp values) to achieve a contact angle greater than that of the pure solvent, which prevents particle aggregation and improves uniformity on porous substrates without requiring additional binding agents
Solution Approach 2:
The patent creates a composite liquid composition system combining particles with specifically selected solvents and optional binding agents. The composite nature of this composition allows the liquid to interact with both the porous substrate and particles in a controlled manner, achieving uniform particle distribution while maintaining dispersion stability during the forming process
2Strength
If the liquid composition penetrates deeply into the porous substrate, then good adhesion is achieved, but particle aggregation and coffee ring effects occur
Solution Approach 1:
The patent optimizes the contact angle parameter to a specific range (greater than the solvent's contact angle but controlled to prevent excessive penetration). This parameter control allows the liquid composition to achieve sufficient adhesion to the substrate while limiting deep penetration that would cause particle aggregation and coffee ring effects, resulting in uniform particle distribution
Solution Approach 2:
The patent introduces binding agents as intermediary substances that facilitate adhesion between particles and substrate without requiring deep liquid penetration. The binding agents act as mediators that provide sufficient bonding strength while allowing the liquid composition to remain relatively superficial, preventing coffee ring effects and maintaining uniformity
3Illumination intensity
If conventional color inks are used, then color images can be formed, but they cannot hide the ground color or improve color development on non-white substrates
Solution Approach 1:
The patent develops composite ink compositions that include white color materials (such as titanium dioxide particles) combined with conventional color inks. This composite structure allows the ink to first hide the ground color through the white pigment layer, then provide color development on top, enabling versatile application on substrates of various colors including transparent sheets and colored plastics
Solution Approach 2:
The patent segments the coloring function into two distinct layers: a white pigment layer that hides the ground color and provides a uniform base, and a color ink layer that provides the actual color image. This segmentation allows each layer to perform its specific function optimally, with the white layer ensuring adaptability to different substrates and the color layer providing quality color development
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 liquid composition effectively improves the degree of particle layer formation, reducing permeation into the substrate and preventing coffee rings, thereby enhancing the performance and quality of electrochemical devices by maintaining uniformity and reducing resistance between electrodes.
Implementation Method 1
a contact angle of the liquid composition with respect to a substrate is greater than a contact angle of the solvent with respect to the substrate
Implementation Method 2
the contact angle of the substrate with respect to water observed 9 seconds after the substrate comes into contact with the water is 45 degrees to 75 degrees
Data Source
AI summary
A liquid composition includes particles and a solvent, wherein a contact angle of the liquid composition with respect to a substrate is greater than a contact angle of the solvent with respect to the substrate, and the contact angle of the substrate with respect to water observed 9 seconds after the substrate comes into contact with the water is 45 degrees to 75 degrees.