The invention discloses an electrode preparation method for enhancing the cyclic performance of the electrode material. The electrode slurry obtained by mixing active material MnO 2 nanotube and conductive agent acetylene black in NMP is evenly coated on the copper foil, dried, and then dripped with PVDF NMP solution on the surface of the copper foil coated with the electrode slurry to prepare the electrode. By adjusting the concentration of binder PVDF solution at 20-40 mg/mL and dropping PVDF solution on the surface of active material MnO 2 to form a protective film to protect the electrode material, the electrode material can effectively prevent the electrode material from dissociating into the electrolyte and losing its activity without breaking away from the collector due to expansion, thereby improving the cycle retention rate of the electrode material, which is 100 mA.g.
【技术实现步骤摘要】
增强电极材料循环性能的电极制备方法
本专利技术属于锂离子电池
,涉及一种增强电极材料循环性能的电极制备方法。
技术介绍
金属氧化物具有资源丰富、理论比容量高及安全可靠等优点,可作为锂离子电池负极材料。金属氧化物虽然具有较高的理论比容量,但其在充放电过程中体积变化较大。当前,传统的电极制备方法是将粘结剂聚偏二氟乙烯(PVDF)混合到电极材料中,使电极材料附着在集流体上(YongLi,etal.Athree-dimensionalcore-shellnanostructuredcompositeofpolypyrrolewrappedMnO2/reducedgrapheneoxide/carbonnanotubeforhighperformancelithiumionbatteries.JournalofColloidandInterfaceScience),该方法可以使比容量较低的正极材料和石墨负极材料表达很好的循环性能,但对于比容量较高的金属氧化物并不适用。文献2(MeganMarieButala,etal,BrentChristopherMelot,Ram ...
【技术保护点】
1.增强电极材料循环性能的电极制备方法,其特征在于,具体步骤如下:将活性材料MnO2纳米管和导电剂乙炔黑混合溶于NMP中得到的电极浆料均匀地涂在铜箔上,干燥,再在涂覆电极浆料的铜箔表面滴加20~40mg/mL的PVDF的NMP溶液,干燥,制得电极。
【技术特征摘要】
1.增强电极材料循环性能的电极制备方法,其特征在于,具体步骤如下:将活性材料MnO2纳米管和导电剂乙炔黑混合溶于NMP中得到的电极浆料均匀地涂在铜箔上,干燥,再在涂覆电极浆料的铜箔表面滴加20~40mg/mL的PVDF的NMP溶液,干燥,制得电极。2.根据权利要求1所述的电极制备方法,其特征在于,所述的MnO2纳...
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