基于PAA黏结剂的陶瓷浆料界面研究

Interface study of ceramic slurries based on PAA binder

聚丙烯酸(PAA)黏结剂作为一种常用的表面改性剂,在锂离子电池极片涂布过程中对极片边缘陶瓷浆料的界面性能起着重要的作用。本研究旨在探究PAA黏结剂对陶瓷浆料界面性能的改善效果。通过固相共混法,使用PAA替代传统聚偏氟乙烯(PVDF)黏结剂制备了陶瓷浆料,并对浆料流变特性及接触角进行测试。结果显示,相对于传统PVDF体系陶瓷浆料,接触角降低至22.7°,且浆料黏度回弹率≤10%,显著提升了陶瓷浆料的润湿性和稳定性,这使得陶瓷浆料更易涂布于基材表面,并与正极活性物质的融合区形成均匀的涂层。这些研究结果为PAA黏结剂在锂离子电池陶瓷浆料制备和应用中的设计和优化提供了重要的理论基础。

PAA binder,as a commonly used surface modifier,plays a crucial role in improving the interface performance of edge ceramic slurries during the electrode coating process in lithium ion batteries.This study aims to investigate the effect of PAA binder on the interface properties of ceramic slurries.Ceramic slurries were prepared by replacing the traditional PVDF(Polyvinylidene Fluoride)binder with PAA binder using the solid-state blending method.The contact angle and rheological properties of the slurries were tested.The results showed that compared to traditional PVDF-based ceramic slurries,the contact angle was reduced to 22.7°,and the viscosity recovery rate of the slurries was≤10%.These findings indicated a significant enhancement in the wetting properties and stability of the ceramic slurries,enabling easier coating on the substrate surface and formation of uniform coatings with the fusion zone of the positive electrode active material.These research results provide an important theoretical foundation for the design and optimization of PAA binder in the preparation and application of ceramic slurries in lithium ion battery electrode coatings.