重庆科技大学学报（自然科学版）2025，Vol.27Issue(5)：37-42,6.DOI:10.19406/j.issn.2097-4531.2025.05.005
PEN/TA-Al2O3/TA-PEI复合隔膜的制备及其在锂离子电池中的应用
Preparation of PEN/TA-Al2O3/TA-PEI Composite Separator and Its Application in Lithium-Ion Batteries
摘要
Abstract
To address the poor thermal stability and low electrolyte affinity of polyolefin separators in lithium-ion bat-teries,a bifunctional modified organic-inorganic composite separator(PEN/TA-Al2O3/TA-PEI)is proposed.By using non-solvent induced phase separation and layer-by-layer self-assembly method,a hierarchical separator is de-signed,with polyarylene ether nitriles(PEN)as the matrix,incorporates tannic acid-modified alumina(TA-Al2O3)nanoparticles internally,and is coated with a tannic acid-polyethyleneimine(TA-PEI)layer on the surface of mem-branes.The rigid framework(thermal decomposition temperature＞500℃)of PEN and thermal barrier effect of TA-Al2O3 result in high thermal stability characteristic of composite separator,the polar functional groups of TA-PEI layer significantly enhance liquid electrolyte wettability and ionic conductivity of separator.Electrochemical test results show that LFP/P-TA-E/Li batteries with the composite separator own a capacity retention rate of 98％after 100 cycles at 1 C.Also,lithium symmetric batteries with the separator could run for 400 hours at 1 mA/cm2 without dendrite formation.关键词
锂离子电池/隔膜/复合材料/锂枝晶Key words
lithium-ion battery/separator/composite material/lithium dendrites分类
动力与电气工程引用本文复制引用
张立豪,林果,郑玉涵,黄玉玲,汪滔,刘晓燕,张邦文..PEN/TA-Al2O3/TA-PEI复合隔膜的制备及其在锂离子电池中的应用[J].重庆科技大学学报（自然科学版）,2025,27(5):37-42,6.基金项目
四川省碳氮高分子新材料工程技术研究中心开放课题项目"高安全导热相变动力电池隔膜的构筑及调温机制研究"(CNP-C-240205) （CNP-C-240205）
湖州市科技局自然科学基金项目"热响应阻燃高安全锂离子电池隔膜的构筑及作用机制研究"(2024YZ18) （2024YZ18）
重庆科技大学研究生创新计划项目"MOFs原位复合隔膜的制备及其锂离子电池性能研究"(YKJCX2421615) （YKJCX2421615）
