摘要
通过静电纺丝技术制备得到了聚酰亚胺(PI)纤维膜,经过扫描电子显微镜、傅里叶红外吸收光谱和热失重测试确定静电纺丝的最优方案,即:纺丝电压为15kV,纺丝速度为0.6mL/h,后处理为化学亚胺化和热亚胺化各3h。经过接触角测试表明,PI纤维膜与电解液有很好的润湿性能,孔隙率可达107%。一系列的测试表明,通过结构调控得到的PI纤维膜可以很好地替代传统的聚烯烃锂离子电池隔膜。
Conventional polyolefin lithium ion battery separators have serious safety hazards due to low melting point,poor thermal stability and the like.Polyimide(PI)can make up for the defects of traditional polyolefin lithium ion battery separators due to its excellent mechanical strength and thermal stability.The polyimide fiber membrane prepared by the electrospinning technology has high porosity,excellent electrolyte wettability and high thermal properties,and can be well applied in the field of lithium ion battery separators.After scanning electron microscopy,fourier infrared absorption spectroscopy and thermal weight loss test,the optimal solution for electrospinning was determined,namely:voltage was 15 kV,spinning speed was 0.6 mL/h,and post-treatment was chemical imidization.And thermal imidization for 3 h,the contact angle test showed that the membrane and the electrolyte had good wetting properties,and the calculated porosity can reach 107%.A series of tests shown that the membrane obtained by structural regulation can be a good substitute for the traditional polyolefin lithium ion battery separators.
作者
李彦明
晁敏
蒋润凯
穆志豪
周振君
颜录科
Li Yanming;Chao Min;Jiang Runkai;Mu Zhihao;Zhou Zhenjun;Yan Luke(School of Materials Science and Engineering,Chang'an University,Xi'an 710061)
出处
《化工新型材料》
CAS
CSCD
北大核心
2020年第2期55-59,65,共6页
New Chemical Materials
基金
大学生创新创业训练计划项目(201810710121).
关键词
锂离子电池隔膜
聚酰亚胺
静电纺丝
lithium ion battery separator
polyimide
electrospinning
作者简介
李彦明(1994-),男,硕士研究生,主要研究方向为耐高温工程塑料;联系人:晁敏,女,副教授。
