CAJ | 학술논문

通过电纺法制备PVdF/PMMA纤维膜.电纺膜的形貌,结构和热行为分别用扫描电镜(SEM),红外(FT-IR),差热扫描量热法(DSC)表征.将电纺膜浸入1mol/L LiClO4/EC+ PC(1∶1,V/V)溶液中,从而得到聚合物电解质.对聚合物电解质的电化学性能如离子电导率,电化学稳定性,界面阻抗和电池性能也进行了研究.结果表明,PMMA的加入增加了聚合物电解质的离子电导率,提高了聚合物电解质的电化学稳定性.PVdF/PMMA聚合物电解质的室温离子电导率高达3.5 mS/cm,电化学稳定性达5.1 V.PMMA的加入降低了界面阻抗.另外,由PVdF/PMMA聚合物电解质组装的Li/PE/LiFePO4电池具有良好的循环性能.试验表明,电纺法可能很有希望应用于制备微孔PVdF/PMMA聚合物电解质.
통과전방법제비PVdF/PMMA섬유막.전방막적형모,결구화열행위분별용소묘전경(SEM),홍외(FT-IR),차열소묘량열법(DSC)표정.장전방막침입1mol/L LiClO4/EC+ PC(1∶1,V/V)용액중,종이득도취합물전해질.대취합물전해질적전화학성능여리자전도솔,전화학은정성,계면조항화전지성능야진행료연구.결과표명,PMMA적가입증가료취합물전해질적리자전도솔,제고료취합물전해질적전화학은정성.PVdF/PMMA취합물전해질적실온리자전도솔고체3.5 mS/cm,전화학은정성체5.1 V.PMMA적가입강저료계면조항.령외,유PVdF/PMMA취합물전해질조장적Li/PE/LiFePO4전지구유량호적순배성능.시험표명,전방법가능흔유희망응용우제비미공PVdF/PMMA취합물전해질.
In this paper,fibrous membranes of PVdF/PMMA were fabricated via electrospinning method.The morphology,structure and thermal behaviors of the electrospun membranes were characterized by scanning electron microscopy (SEM),fourier transform infra-red (FT-IR) spectroscopy and differential scanning calorimetry ( DSC ),respectively.Polymer electrolytes were prepared by immersing membranes into 1 mol/L LiClO4/EC + PC ( 1∶ 1,V/V).Electrochemical properties of ionic conductivity,electrochemical stability,interfacial resistance and cell performance of the electrolyte were investigated.The results suggested that the addition of PMMA increased the ionic conductivity and electrochemical stability of the polymer electrolyte.The PVdF/PMMA polymer electrolyte exhibited a high ionic conductivity of 3.5 mS/cm at room temperature and electrochemically stable up to 5.1 V.Also,the addition of PMMA into PVdF decreased the interfacial resistance with lithium electrode.In addition,Li/PE/LiFePO4 cell with PE based on electrospun PVdF/PMMA membrane exhibited excellent cycling performance.These results revealed that this new method may be very promising for preparing microporous PVdF/PMMA polymer electrolytes.