The invention discloses a modified electrospinning composite diaphragm, a preparation method thereof and a lithium battery comprising the modified electrospinning composite diaphragm, and the preparation method comprises the following steps: S1, taking polyacrylonitrile and polyvinylidene fluoride as raw materials, and carrying out electrostatic spinning to obtain a PAN/PVDF nanofiber diaphragm; s2, performing heat treatment on the PAN/PVDF nanofiber diaphragm to obtain a diaphragm matrix; and S3, coating the surface of the diaphragm substrate with the SiO2/GO composite solution, and then drying to obtain the modified electrospinning composite diaphragm. Through combination of an electrostatic spinning process, a heat treatment process and a functional coating coating process, the electrochemical performance, safety and stability of the lithium battery are improved.

    本发明公开一种改性电纺复合隔膜及其制备方法、包含其的锂电池,制备方法包括以下步骤:S1.以聚丙烯腈、聚偏氟乙烯为原料,进行静电纺丝,得到PAN/PVDF纳米纤维隔膜;S2.热处理PAN/PVDF纳米纤维隔膜,得到隔膜基体;S3.在隔膜基体表面涂覆SiO2/GO复合溶液,而后干燥,即得改性电纺复合隔膜;通过静电纺丝工艺、热处理工艺及功能性涂层涂覆工艺相结合,本方案提升锂电池的电化学性能及安全稳定性。


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    Title :

    Modified electrospinning composite diaphragm, preparation method thereof and lithium battery comprising modified electrospinning composite diaphragm


    Additional title:

    一种改性电纺复合隔膜及其制备方法、包含其的锂电池


    Contributors:
    LENG XIAOLONG (author) / LI YUMEI (author) / XU GANG (author) / XIONG WEI (author) / XIAO SHENGHAO (author) / KO TAE-JO (author)

    Publication date :

    2024-11-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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