储能科学与技术2026，Vol.15Issue(9)：3525-3534,10.DOI:10.19799/j.cnki.2095-4239.2026.0398
固态电解质湿法PE挤出隔膜的应用研究
Application of solid-state electrolytes in wet-process PE extruded separators
郭占星 1李坤 1马文献 1杨欢 1侯丹丹 1赵壮壮1
作者信息
- 1. 河北金力新能源科技有限公司,河北 邯郸 057150
- 折叠
摘要
Abstract
To meet the performance requirements of next-generation commercial batteries and overcome the limitations of traditional wet-processed polyethylene(PE)separators,such as low ionic conductivity,low porosity,poor electrolyte affinity,and inadequate wettability,this study introduces the solid-state electrolyte lithium aluminum titanium phosphate(LATP)as an extrusion additive to enhance the performance of commercially available wet-processed PE separators.A solid-state electrolyte-PE composite membrane was successfully fabricated,and a practical fabrication process with specific processing parameters is presented.The effects of different LATP loadings(20％and 50％)on the properties of the composite separator were systematically investigated.The optimal performance was achieved at a LATP loading of 20％.The results indicate that,at a 20％LATP loading,the porosity of the separator increased from 45.74％for the pure PE membrane to 55.84％for the composite membrane.Microscopic characterization revealed large pore sizes and the presence of distinct LATP particles within the cross-section of the separator.Furthermore,the electrolyte wettability of the separator was significantly improved,with the contact angle decreasing from 40.4° to 34.1° and the electrolyte uptake increasing from 80％to 105％,demonstrating enhanced physicochemical properties.Additionally,ionic conductivity measurements and electrochemical evaluations were conducted on both the pure PE membrane and the composite membrane.The results showed that the ionic conductivity of the composite membrane increased from 0.897 mS/cm for the pure PE membrane to 2.137 mS/cm.Moreover,coin cells assembled with the composite membrane exhibited lower resistivity,longer cycle life,and superior rate capability.关键词
固态电解质/磷酸钛铝锂(LATP)/湿法PE隔膜/离子电导率/润湿性Key words
solid-state electrolyte/LATP/TIPS PE separator/ionic conductivity/wettability分类
信息技术与安全科学引用本文复制引用
郭占星,李坤,马文献,杨欢,侯丹丹,赵壮壮..固态电解质湿法PE挤出隔膜的应用研究[J].储能科学与技术,2026,15(9):3525-3534,10.
