Electrostatic Fibrillization of Binder Components in Electrode Films
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Solution Overview
Problem
Conventional mechanical fibrillization processes for energy storage device electrode films often damage active material components and result in inefficient and non-uniform fibrillization, leading to diminished chemical and electrical properties.
Innovation Solution
The use of an electrostatic field to fibrillize a negatively charged binder component, reducing shear stress and maintaining the integrity of active material components, while facilitating efficient and uniform fibril formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If mechanical fibrillization process is used, then binder component can be fibrillized to provide mechanical structure, but active material components are damaged and chemical and electrical properties are diminished
Solution Approach 1:
The patent replaces the mechanical fibrillization system with an electrostatic field-based system. Instead of using mechanical shear forces that damage active material, the invention applies electrostatic forces to charged binder particles to induce fibrillization. This substitution eliminates the harmful mechanical stress while achieving the desired fibril formation for mechanical structure.
Solution Approach 2:
The invention changes the physical state and charging parameters of the binder component. By charging the binder particles and applying an electrostatic field, the system transforms the fibrillization mechanism from mechanical to electrical. This parameter change allows fibril formation without the damaging effects of mechanical shear forces.
2Productivity
If mechanical fibrillization process is used, then binder component can be fibrillized, but the fibrillization is inefficient and non-uniform
Solution Approach 1:
The electrostatic field system provides more uniform force distribution compared to mechanical shear forces. The electric field acts uniformly on all charged binder particles simultaneously, resulting in consistent fibril formation throughout the electrode film without the non-uniformity inherent in mechanical mixing and shear processes.
3Manufacturing precision
If electrostatic field is applied to negatively charged binder component, then uniform and efficient fibril formation is achieved, but additional charging step is required
Solution Approach 1:
The invention combines the charging step with the fibrillization process by using the same electrostatic field application for both purposes. The binder particles are charged and then fibrillized within the same electrostatic field environment, merging what could be separate operations into a unified process that achieves both charging and fibril formation simultaneously.
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 improved mechanical strength and electrochemical integrity of the electrode films, enhancing the electrical performance of energy storage devices by reducing the equivalent series resistance (ESR) and improving power and energy performance.
Implementation Method 1
A negatively charged fibrillizable binder component is subjected to an electric field, such that the negatively charged binder component is manipulated by the electric field through an electrostatic force, so as to fibrillize the negatively charged binder component.
Implementation Method 2
providing the negatively charged fibrillizable binder component includes contacting a fibrillizable binder component with an electron donor
Data Source
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AI summary
A method of fibrillizing a fibrillizable binder component of an electrode film can include providing a negatively charged fibrillizable binder component, and applying an electric field upon the negatively charged binder component to fibrillize the negatively charged fibrillizable binder component. A system for fibrillizing a binder component of an electrode film can include a mixing container made of a material having an affinity to donate electron(s) to the binder component, and an actuator configured to apply a force upon the mixing container so as to contact the mixing container with the binder component and to move the mixing container and the binder component relative to each other within a speed and range of motion sufficient to create an electrostatic force on the binder component and fibrillize the binder component.