Non-aqueous Battery Laminate Adhesion via Polymer Plasticization
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Solution Overview
Problem
Conventional methods for producing non-aqueous secondary battery laminates face issues with misalignment and reduced productivity due to inadequate process adhesiveness between electrodes and separators, leading to faults during cutting and transportation.
Innovation Solution
A method involving the plasticization of polymers on the surface of electrodes and separators using a substance that lowers the glass-transition temperature, allowing for improved adhesiveness by increasing the adhesive force between the components without increasing resistance, thereby enhancing process adhesiveness and preventing misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional adhesive methods are used to bond electrodes and separators, then the laminate can be assembled, but process adhesiveness is insufficient leading to misalignment and faults during cutting and transportation
Solution Approach 1:
The invention changes the physical-chemical parameters of the polymer by controlling its glass-transition temperature to be 30°C or higher, and by supplying substances that plasticize the polymer, thereby transforming the polymer from a rigid state to a flexible adhesive state that provides excellent process adhesiveness during battery assembly and cutting operations
Solution Approach 2:
The invention introduces a polymer as an intermediary substance between the electrode and separator surfaces. This polymer, when plasticized by supplied substances, acts as a mediating adhesive layer that bonds the components together while maintaining flexibility and preventing misalignment during subsequent processing operations
2Strength
If adhesive resin solutions are used to bond electrodes and separators, then adhesion is achieved, but resistance between electrodes may increase
Solution Approach 1:
The invention changes the chemical composition parameters of the adhesive system by using plasticized polymers instead of traditional adhesive resin solutions. This substitution maintains strong adhesive bonding while avoiding the introduction of conductive contaminants that would increase electrical resistance between electrodes
Solution Approach 2:
The invention employs a polymer-based adhesive system that is applied in controlled amounts and serves its bonding function effectively during the assembly and processing stages, providing sufficient adhesion without requiring the complex formulations of conventional adhesive resin solutions
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 method efficiently produces laminates with excellent process adhesiveness, reducing faults and increasing productivity by ensuring strong and consistent adhesion between electrodes and separators, leading to improved battery performance.
Implementation Method 1
supplying, to at least one of an affixing surface of the electrode and an affixing surface of the separator, a substance that can plasticize a polymer contained in a surface layer part at an affixing surface side
Implementation Method 2
a substance that can plasticize a polymer... the polymer having a glass-transition temperature of 30°C or higher
Data Source
AI summary
Provided is a method of efficiently producing a laminate for a non-aqueous secondary battery having excellent process adhesiveness. The method of producing a laminate for a non-aqueous secondary battery is a method of producing a laminate for a non-aqueous secondary battery including an electrode and a separator that are affixed to each other and includes: a step (A) of supplying, to at least one of an affixing surface of the electrode and an affixing surface of the separator, a substance that can plasticize a polymer contained in a surface layer part at an affixing surface side of at least one of the electrode and the separator; and a step (B) of affixing the electrode and the separator to each other after step (A).