Non-aqueous Battery Adhesive Composition for Low-Temperature Bonding
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Solution Overview
Problem
Current methods for manufacturing secondary batteries require high temperatures and long treatment times to ensure adhesion between battery members, which hampers productivity and low-temperature output characteristics.
Innovation Solution
A non-aqueous secondary battery adhesive layer composition comprising organic particles with a core-shell structure and a specific weight-average molecular weight, along with a binder such as styrene-butadiene copolymer, that provides good adhesion even at lower temperatures for shorter times, enhancing low-temperature output characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating at relatively high temperatures and relatively long treatment time is used to bond battery members, then adhesion between battery members is sufficient, but productivity is reduced
Solution Approach 1:
The invention changes the molecular weight parameter of the binder polymer to a specific range (10,000 to 1,000,000) to optimize the balance between adhesion and processing conditions, enabling effective bonding at lower temperatures and shorter times while maintaining sufficient adhesion strength
Solution Approach 2:
The invention uses a composite adhesive layer comprising both polymer particles and binder polymer, where the binder polymer with specific molecular weight characteristics provides the necessary adhesion properties while allowing reduced heating conditions, thus improving productivity without sacrificing bond strength
2Reliability
If heating at relatively high temperatures and relatively long treatment time is used to bond battery members, then adhesion between battery members is sufficient, but treatment time is extended
Solution Approach 1:
The invention optimizes the molecular weight parameter of the binder polymer to enable effective adhesion at lower temperatures and shorter treatment times, directly reducing the time loss associated with the bonding process while maintaining sufficient adhesion
Data Source
AI summary
Disclosed is a composition for non-aqueous secondary battery adhesive layer which comprises organic particles and a binder, wherein the organic particles comprise molecules having a weight-average molecular weight of 100 to 10,000, and a weight fraction of the molecules in the organic particles is 1% to 40%. Also disclosed is a non-aqueous secondary battery adhesive layer prepared by using the composition. Further disclosed is a non-aqueous secondary battery which comprises a positive electrode, a negative electrode, a separator, and an electrolysis solution, wherein at least one of the positive electrode, the negative electrode and the separator comprises the non-aqueous secondary battery adhesive layer.