广东石油化工学院学报2026，Vol.36Issue(1)：8-13,6.DOI:10.26962/j.cnki.1991.2026.0002
基于工艺-组分协同优化的勃姆石涂覆锂电池隔膜性能
Boehmite-Coated Lithium-Ion Battery Separator Performance Enabled by Process-Composition Synergistic Optimization
摘要
Abstract
This study demonstrates a significant enhancement in the overall performance of polypropylene(PP)separators through the synergistic optimization of boehmite(γ-AlOOH)ceramic slurry formulation and coating process.An aqueous slurry was prepared via ball milling,with a systematic investigation conducted on the ball milling time,pH value,and binder content.The results indicated that ball milling for 60 minutes reduced the particle D50 to approximately 410 nm.When the slurry pH was maintained between 9.5 and 10.5,the centrifugal sedimentation rate was optimized to below 9%.Coupled with the incorporation of 8%polyacrylate binder,the coating peel strength was increased to approximately 1.8 N/13 mm.The separator coated with a 30%boehmite loading exhibited superior overall performance:puncture strength was enhanced to 715 g,electrolyte uptake reached 114%,and the thermal shrinkage rates at 130℃were approximately 2.40%and 0.87%in the transverse(TD)and machine(MD)directions,respectively.Furthermore,FTIR(characteristic Al—O peak at 748 cm-1),EDS(characteristic Al element signal),and SEM analyses confirmed the uniform distribution and successful loading of the particles(30%boehmite sample).This research provides crucial insights into the synergistic optimization of process parameters and component formulation for the development of high-safety lithium-ion battery separators.关键词
陶瓷涂覆/锂离子电池/聚烯烃隔膜/勃姆石/浆料稳定性Key words
ceramic coating/lithium-ion battery/polyolefin separator/boehmite/slurry stability分类
通用工业技术引用本文复制引用
张朝益,吴铛,史博,陈杏梅,陈梦麟,徐井水..基于工艺-组分协同优化的勃姆石涂覆锂电池隔膜性能[J].广东石油化工学院学报,2026,36(1):8-13,6.基金项目
广东省科技专项资金项目(2019ST115) （2019ST115）
茂名市科技计划项目(2022S040) （2022S040）
