Solid-State Battery Binder with Dual-Segment Toughness and Adhesion
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Solution Overview
Problem
Existing binders for solid electrolyte batteries do not provide sufficient adhesiveness and toughness to the solid electrolyte and electrode material layers, leading to potential cracking and peeling under bending stress and tension.
Innovation Solution
A binder for solid electrolyte batteries containing a polymer with a segment A having a glass transition temperature of 25°C or less and a segment B with a melting point of 50°C or more, which enhances flexibility and toughness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional binders are used for solid electrolyte batteries, then the manufacturing process is simple, but the adhesiveness and toughness of the solid electrolyte and electrode material layers are insufficient
Solution Approach 1:
The polymer binder is divided into two distinct segments: segment A (glass transition temperature ≤25°C) providing flexibility and segment B (melting point ≥50°C) providing adhesiveness and toughness. This segmentation allows each segment to independently contribute its specific properties, resolving the contradiction between achieving high strength and maintaining simple structure.
Solution Approach 2:
The binder uses a block copolymer composite structure combining segment A and segment B with different thermal properties. This composite approach enables the binder to simultaneously exhibit both flexibility (from segment A) and strong adhesiveness/toughness (from segment B), achieving enhanced mechanical performance without excessive complexity.
2Reliability
If the binder provides high adhesiveness and toughness, then the layers resist bending stress and tension, but the polymer structure becomes more complex
Solution Approach 1:
The block copolymer is segmented into distinct A and B regions that self-organize into micellar or phase-separated structures. Segment A domains provide flexibility and stress distribution, while segment B domains provide strong adhesion and toughness. This segmentation enables reliable stress resistance through a relatively simple diblock or triblock structure.
Solution Approach 2:
The binder design changes key thermal parameters: segment A has glass transition temperature ≤25°C (near or below room temperature) for flexibility, while segment B has melting point ≥50°C for structural integrity and adhesion. By controlling these temperature parameters, the polymer achieves reliable mechanical performance under bending and tension without requiring complex multi-component systems.
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 binder forms solid electrolyte and electrode material layers with excellent adhesiveness and toughness, resisting bending stress and maintaining integrity under tension.
Implementation Method 1
a segment A having a glass transition temperature of 25°C or less
Implementation Method 2
a segment B having a melting point of 50°C or more
Data Source
AI summary
Provided is a binder for a solid-state electrolyte battery, comprising a polymer comprising a segment A having a glass transition temperature of 25°C or less and a segment B having a melting point of 50°C or more.