Battery Separator Functional Layer Slurry for Adhesion and Rate Performance
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Solution Overview
Problem
Conventional functional layers for non-aqueous secondary batteries face challenges in achieving improved adhesiveness and rate characteristics.
Innovation Solution
A slurry composition containing organic particles, a binder, and a melamine compound, where the melamine compound constitutes between 0.5 mass % and 85 mass % of the total binder and melamine compound, is used to form a functional layer with enhanced adhesiveness and rate characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional functional layer is formed using a slurry composition containing only organic particles and binder, then the layer can be formed with basic structure, but the adhesiveness and rate characteristics are insufficient
Solution Approach 1:
The patent applies composite materials by combining organic particles, binder, and melamine compound in specific proportions to create a functional layer with enhanced adhesiveness and rate characteristics. The melamine compound (0.5-85 mass%) acts as a crosslinking agent that forms a composite structure with the binder and organic particles, improving overall performance without excessive complexity
Solution Approach 2:
The patent applies parameter changes by optimizing the proportion of melamine compound relative to the binder (0.5-85 mass%) and controlling the glass-transition temperature of organic particles (25°C or higher). These parameter adjustments transform the functional layer properties to achieve both excellent adhesiveness and rate characteristics
2Strength
If the proportion of melamine compound is increased to improve adhesiveness, then binding capacity increases, but the composition becomes more complex and costly
Solution Approach 1:
The patent applies parameter changes by establishing an optimized proportion range for melamine compound (0.5-85 mass% relative to binder). This parameter optimization ensures sufficient binding capacity and adhesiveness while avoiding excessive melamine compound usage that would increase complexity and cost
Data Source
AI summary
Provided is a slurry composition for a non-aqueous secondary battery functional layer with which it is possible to form a functional layer that has excellent adhesiveness and that can improve rate characteristics of a non-aqueous secondary battery. The slurry composition for a non-aqueous secondary battery functional layer contains organic particles, a binder, and a melamine compound. The melamine compound constitutes a proportion of not less than 0.5 mass % and not more than 85 mass % among the total of the binder and the melamine compound.