聚乙烯亚胺/聚丙烯腈复合纤维薄膜的制备及其功能化应用  

Preparation and functional application of polyethyleneimine /polyacrylonitrile composite fiber membrane

作　　者：王浩然 于影[2] 左雨欣 顾志清 卢海龙 陈洪立[1] 柯俊 WANG Haoran;YU Ying;ZUO Yuxin;GU Zhiqing;LU Hailong;CHEN Hongli;KE Jun(School of Mechanical Engineering,Zhejiang Sci-Tech University,Hangzhou,Zhejiang 310018,China;College of Information Science and Engineering,Jiaxing University,Jiaxing,Zhejiang 314001,China;Jiaxing Nanhu University,Jiaxing,Zhejiang 314001,China)

机构地区：[1]浙江理工大学机械工程学院,浙江杭州310018 [2]嘉兴学院信息科学与工程学院,浙江嘉兴314001 [3]嘉兴南湖学院,浙江嘉兴314001

出　　处：《纺织学报》2024年第9期26-32,共7页Journal of Textile Research

基　　金：国家自然科学基金项目(52305059);浙江省自然科学基金项目(LGG21E050021);嘉兴市应用性基础研究专项资助项目(2020AY10015,2020AD10015,2021AY30020)。

摘　　要：针对金属-空气电池阴极易腐蚀的问题,将聚乙烯亚胺(PEI)和聚丙烯腈(PAN)共混,基于静电纺丝方法制备PEI/PAN复合纤维薄膜,抑制CO_(2)对空气阴极的侵蚀。借助计算机模拟方法计算PEI/PAN复合纤维薄膜的最佳成分配比,采用扫描电子显微镜、傅里叶变换红外吸收光谱仪、同步热分析仪等对PEI/PAN复合纤维薄膜的物理特性、CO_(2)吸附性能进行表征和分析。以铝-空气电池为例,通过电池测试系统分析了PEI/PAN复合纤维薄膜对电池电化学性能的影响情况。结果表明:基于静电纺丝技术可成功将PEI嵌入PAN纤维中,所制备的PEI/PAN复合纤维薄膜纤维直径均一且表面光滑;当PEI/PAN复合纤维薄膜中的PEI质量分数为50%时,在100 kPa条件下其CO_(2)吸附量可达1.86 mmol/g;在金属-空气电池阴极添加PEI/PAN复合纤维薄膜,相较于传统铝-空气电池,其比容量提升19.5%,放电时间延长20.4%。Objective The CO_(2) corrosion of metal-air batteries is extremely serious,which greatly limits the service life of the metal-air batteries.Existing researches generally add CO_(2) absorbers or O_(2) selective membranes to the cathodes,which indeed inhibit the CO_(2) corrosion to a certain extent,but have a negative impact on the electrochemical performance of the batteries.Therefore,there is an urgent need to explore a new method to inhibit cathode corrosion in metal-air batteries,which would not sacrifice the electrochemical performance of the battery and can effectively inhibit CO_(2) corrosion.Method Polyethyleneimine/polyacrylonitrile(PEI/PAN)precursor solutions with different PEI contents were prepared,and PEI/PAN composite fiber membranes were fabricated by electrospinning.The microstructure of the composite fiber membrane was characterized by scanning electron microscope and infrared spectrometer.The influences of different PEI contents on the CO_(2) adsorption performance of PEI/PAN composite fiber membranes were studied combining computer simulation and CO_(2) adsorption-desorption experiments.An aluminum-air battery with a PEI/PAN composite fiber membrane was prepared to verify the optimization effect of the composite fiber membrane on the discharge performance of the battery.Results PEI was successfully embedded into PAN fibers through electrospinning,and the surface was smooth and the layered fiber structure was evenly distributed.The computer simulation results showed that the PEI/PAN composite fiber membrane of system II(50%PEI)illustrated excellent adsorption performance,and the CO_(2) adsorption-desorption experiment further confirmed the simulation results.When the pressure was 100 kPa,the adsorption capacity of PEI/PAN composite fiber membrane was 1.86 mmol/g.The experimental and simulation results agreed well to each other.Taking aluminum-air batteries as an example,aluminum-air batteries with PEI/PAN composite fiber membranes were assembled.Electrochemical test results showed that compared wi

关 键 词：复合纤维薄膜 CO_(2)吸附 聚乙烯亚胺 聚丙烯腈 空气阴极腐蚀 金属-空气电池 静电纺丝 

分 类 号：TQ152[化学工程—电化学工业]