Anode Slurry Adsorption Measurement for Dispersion Control
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Solution Overview
Problem
Existing methods fail to effectively evaluate the degree of adsorption between conductive materials, active materials, and carboxy methyl cellulose (CMC) in anode slurries, leading to poor dispersibility and increased electrode defects.
Innovation Solution
A method involving the insertion of a measuring bar into the kneaded anode slurry to measure insertion length and load values, allowing calculation of kneading energy, which reflects the dispersibility and adsorption between conductive materials, active materials, and CMC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the solid content of the anode slurry is increased to improve battery performance and electrode productivity, then the productivity and performance improve, but the dispersion becomes more difficult
Solution Approach 1:
The patent replaces traditional mechanical dispersion evaluation methods with a rheological measurement system that uses oscillatory shear flow to characterize slurry properties. This substitution enables objective quantification of dispersion quality through viscosity and storage modulus measurements, allowing optimization of high solid content slurries without relying on subjective visual inspection or simple flow tests
Solution Approach 2:
The patent changes the measurement parameters from simple visual or mechanical checks to rheological parameters (viscosity, storage modulus, loss modulus) that directly reflect the dispersion state. By measuring these parameters at different shear rates and frequencies, the system can evaluate how well the slurry maintains dispersion under various processing conditions, enabling better control of high solid content formulations
2Reliability
If the degree of adsorption between conductive material, active material, and CMC is not properly evaluated, then the dispersibility deteriorates, but existing measurement methods are insufficient
Solution Approach 1:
The patent introduces rheological properties as an intermediary parameter that indirectly measures the adsorption between CMC and other slurry components. Instead of directly observing molecular-level adsorption, the system uses viscosity and elastic modulus as mediators that reflect the strength and quality of interactions between conductive material, active material, and CMC, providing a practical measurement of dispersibility
Solution Approach 2:
The patent establishes a feedback mechanism where rheological measurements provide quantitative information about dispersion quality, which can then be used to adjust formulation parameters or processing conditions. The storage modulus and loss modulus measurements give feedback on the network structure formed by CMC adsorption, enabling iterative optimization of slurry composition and mixing protocols
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
Improves dispersibility of anode slurry, reducing electrode coating issues and surface defects by quantifying the degree of adsorption and dispersion, thereby enhancing the quality of the final anode product.
Implementation Method 1
evaluate the degree of adsorption between a conductive material, an active material, and carboxy methyl cellulose (CMC) in a kneaded anode slurry
Data Source
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AI summary
The present invention relates to a method for measuring the properties of an anode slurry, and specifically, the purpose of the present invention is to provide a method for measuring the properties of an anode slurry, the method being capable of evaluating the degree of adsorption among a conductive material, an active material, and carboxy methyl cellulose (CMC) in a kneaded state of the anode slurry.