Battery Binder Polymer Composition for Stronger Electrode Bonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing binders in batteries exhibit inferior bonding performance, leading to deteriorated kinetic and safety performance due to ineffective component bonding, posing safety hazards.
Innovation Solution
A polymer composed of an organic polymer and an inorganic compound, formulated through specific monomer combinations, enhances bonding properties and glass transition temperature, improving ion conductivity and electrolyte solution resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional binders are used in batteries, then the structure is simple and easy to manufacture, but the bonding performance is inferior and cannot effectively bond battery components
Solution Approach 1:
The patent applies composite materials by combining organic polymer and inorganic compound in a specific mass ratio (95:5 to 50:50) to create a binder with superior bonding performance. The inorganic compound particles (0.1-2 μm diameter) are dispersed within the organic polymer matrix, forming a composite structure that enhances adhesion to electrode plates while maintaining manufacturability through conventional slurry preparation and coating processes
Solution Approach 2:
The patent utilizes parameter changes by adjusting the glass transition temperature (Tg) of the organic polymer to -50°C to 0°C and controlling the mass ratio of inorganic compound to organic polymer (5:95 to 50:50). These parameter optimizations enable the binder to maintain appropriate viscosity and bonding characteristics during battery manufacturing and operation, significantly improving bonding performance compared to conventional binders
2Strength
If binder bonding performance is improved through complex polymer formulations, then component bonding is enhanced, but the glass transition temperature becomes inappropriate for battery operating conditions
Solution Approach 1:
The patent precisely controls the glass transition temperature of the organic polymer within -50°C to 0°C through selection of specific polymer types and formulation adjustments. This temperature parameter optimization ensures that the binder remains in an optimal viscoelastic state during battery operation, providing strong bonding without becoming too soft or too rigid, thus resolving the contradiction between bonding strength and temperature appropriateness
3Productivity
If polymer bonding properties are enhanced, then kinetic performance improves, but safety performance deteriorates due to ineffective component bonding
Solution Approach 1:
The patent employs composite materials with inorganic compound particles dispersed in organic polymer matrix to achieve superior bonding performance. This enhanced bonding prevents electrode plate detachment and component failure during battery operation, simultaneously improving both kinetic performance through better electrical contact and safety performance by preventing mechanical failures and potential safety hazards
Data Source
AI summary
A polymer includes an organic polymer and an inorganic compound. Polymerization monomers of the organic polymer include a first monomer and a second monomer. A structural formula of the first monomer includes:where, R1 includes a hydrogen atom or a C1 to C6 alkyl group; R2 includes a hydrogen atom, a substituted or unsubstituted C1 to C21 alkyl group, a C3 to C6 cycloalkyl group, and a substituted or unsubstituted isobornyl group; and a substituent in the substituted C1 to C21 alkyl group includes a hydroxyl group; and the second monomer includes an alkenyl group.