同轴纳米纤维电池隔膜制备及性能研究  

Preparation and Properties of Coaxial Nanofiber Battery Separator

作　　者：穆昌会 胥桂萍[1] MU Chang-hui;XU Gui-ping(School of Optoelectronic Materials and Technology,Jianghan University,Wuhan 430056,China;College of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550000,China)

机构地区：[1]江汉大学光电材料与技术学院,湖北武汉430056 [2]贵州大学化学与化工学院,贵州贵阳550000

出　　处：《安徽化工》2024年第6期43-46,共4页Anhui Chemical Industry

基　　金：江汉大学武汉研究院2021年度开放性课题(项目编号IWHS20212082)。

摘　　要：以聚酰亚胺(PI)和聚偏二氟乙烯-co-六氟丙烯(PVDF-HFP)为纺丝溶液,通过高压静电纺丝机制备复合PI/PVDF-HFP隔膜,对隔膜进行SEM、红外、热重分析等表征手段研究复合PI/PVDF-HFP的结构和形貌,将隔膜组装在纽型电池中进行化学性能测试。在锂离子电池的循环性能测试中,45次充放电过程保持着良好的充放电性能。从电池充放电比容量的效率来看,电纺复合隔膜PI的放电比容量效率一直保持在97%以上,而PP隔膜电池的效率忽高忽低,极不稳定,说明高压静电纺丝出来的复合PI/PVDF-HFP无纺布膜具有充放电循环稳定的优异性能。Polyimide(PI)and polyvinylidene difluoroethylene-co-hexaflor-opropene(PVDF-HFP)were used as spinning solution,and the composite PI/PVDF-HFP separator was prepared by high voltage electrospinning mechanism.Then,the separator was characterized by SEM,infrared and thermogravimetric analysis to study the structure and morphology of the composite PI/PVDF-HFP.Then the separator was assembled in a button type battery for chemical performance test.In the cycle performance test of lithium-ion battery,good performance was maintained in the forty-five charge-discharge pro⁃cesses.From the perspective of the efficiency of the charge-discharge capacity of the battery,the efficiency of the discharge capacity of the electro-spinning composite separator PI has been kept above 97%,while the efficiency of the PP separator battery fluctuates between high and low,making it extremely unstable.The excellent performance of PI/PVDF-HFP nonwo⁃ven film made by high voltage electrospinning is demonstrated.

关 键 词：复合隔膜 静电纺丝 锂离子电池 PI/PVDF-HFP 

分 类 号：TQ340[化学工程—化纤工业]