为了研究聚吡咯的微观形貌对电化学性能的影响,采用化学氧化聚合法制备了微观形貌不同的聚吡咯,通过改变氧化剂种类、反应物摩尔比、掺杂剂溶液的浓度来调控聚吡咯的形貌及结构,利用场发射扫描电子显微镜、傅里叶变换红外光谱、X射线多晶粉末衍射、热重分析等表征手段对聚吡咯进行表征,并将其制备成电极材料,在三电极体系下测试其电化学性能。结果表明,不同形貌的聚吡咯表现出不同的电化学性能,分散均匀的球状聚吡咯具有更高的比电容,适合用作储能材料。通过添加掺杂剂制备的疏松、分散性好的薄片状结构的聚吡咯,其溶液电阻更低,更适合用作电催化导电材料。
In order to study the effect of micromorphology of polypyrrole on electrochemical performance,polypyrrole samples with different micromorphologies were prepared by chemical oxidative polymerization.In the process of reaction,different oxidants,the reactants molar ratio,the concentration of dopant were controlled to regulate the morphology and structure of polypyrrole.Characterization was performed by field emission scanning electron microscopy,Fourier transform infrared spectrometer,X-ray diffraction,and thermogravimetric analysis.Moreover,the polypyrrole was fabricated into electrode material and tested for its electrochemical performance in a three-electrode system.The results showed that polypyrrole with different morphologies exhibited distinct electrochemical properties.The uniformly dispersed spherical polypyrrole demonstrated a higher specific capacitance,making it more suitable for energy storage material.The polypyrrole with a loose and well-dispersed flake-like structure prepared by adding dopants exhibited lower solution resistance,which was more beneficial as conductive material for the application in electrocatalytic material.
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基金资助
国家自然科学基金(22065028);包头师范学院黄河流域生态保护和高质量发展研究院科研项目(BSYHY202220);内蒙古自然科学基金(2024QN02020)
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