Battery Electrode Primer Copolymer for Strong Adhesion
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Solution Overview
Problem
Existing electrodes face challenges in achieving outstanding adhesion between electroactive materials and current collectors without compromising electrochemical performance.
Innovation Solution
A copolymer obtained by radical polymerization of phosphorus-containing unsaturated monomers with acrylic acid and/or methacrylic acid is used as a primer to enhance adhesion between electroactive materials and current collectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a primer is used to improve adhesion between electroactive material and current collector, then adhesion strength is improved, but electrochemical performance may be negatively affected
Solution Approach 1:
The patent changes the chemical composition parameters of the primer by incorporating phosphonic acid groups and carboxylic acid groups in specific ratios. This chemical parameter modification enables the primer to achieve both strong adhesion and maintained electrochemical performance, resolving the contradiction between adhesion strength and electrochemical reliability.
Solution Approach 2:
The patent creates a composite primer material combining phosphonic acid compounds, carboxylic acid compounds, and conductive additives in specific proportions. This composite structure provides both strong bonding capability and electrochemical functionality, simultaneously improving adhesion while maintaining electrochemical performance.
2Reliability
If a small amount of polymer is used to maintain electrochemical performance, then electrochemical performance is preserved, but adhesion may be insufficient
Solution Approach 1:
The patent modifies the chemical parameters of the polymer by incorporating phosphonic acid and carboxylic acid functional groups with specific pKa values and ratios. These parameter changes dramatically enhance the adhesion mechanism through chemical bonding, allowing effective adhesion even at low polymer concentrations that preserve electrochemical performance.
Solution Approach 2:
The patent introduces phosphonic acid and carboxylic acid groups as intermediary functional groups that mediate between the polymer and the substrate. These intermediary groups form strong chemical bonds with both the polymer backbone and the substrate surface, enabling effective adhesion with minimal polymer content.
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 use of this copolymer primer achieves excellent adhesion while maintaining the electrochemical performance of the electrodes, even with a small amount of polymer used.
Implementation Method 1
a copolymer (A) obtained by radical polymerization of at least one phosphorus-containing unsaturated monomer with acrylic acid and/or methacrylic acid
Implementation Method 2
a primer that improves the adhesiveness between a composition comprising an electro active material and a current collector
Data Source
AI summary
The present invention relates to a primer that improves adhesiveness between an electro active material and a current collector, and to an electrode comprising the same.