脉冲磁场辅助水热法制备三维Al-MnO_(2)复合材料及其表征

Preparation and characterization of three-dimensional Al-MnO_(2) composites by pulsed magnetic field assisted hydrothermal method

以高锰酸钾(KMnO_(4))、硫酸锰(MnSO_(4))和硝酸铝(Al(NO_(3))3)为原料,利用脉冲磁场辅助水热法制备了具有三维网络Al-MnO_(2)的复合材料。通过X射线衍射仪、场发射扫描电子显微镜和纳米测量仪分别对样品的结构和形貌进行表征。电化学测试结果表明,当电流密度为2 mA/cm^(2)时,PEF-Al-MnO_(2)的面电容6294.74 mF/cm^(2)、在10 mA/cm^(2)时循环3000次后的电容保留率96.77%,并且具有良好的耐腐蚀性能和更小的内阻以及更强的电荷传递能力。对比无脉冲的材料,可以看出利用脉冲电磁场的辅助制备方法是提高Al-MnO_(2)性能的有效手段。

In this paper,Al-MnO_(2) composites with three-dimensional network are prepared by pulsed magnetic field assisted hydrothermal method using potassium permanganate(KMnO_(4)),manganese sulfate(MnSO_(4))and aluminum nitrate(Al(NO_(3))3)as raw materials.The structure and morphology of the samples are characterized by X-ray diffractometer,field emission scanning electron microscope and nano-meter,respectively.The electrochemical test results show that when the current density is 2 mA/cm^(2),the surface capacitance of PEF-Al-MnO_(2) is 6294.74 mF/cm^(2),the capacitance retention rate is 96.77%after 3000 cycles at 10 mA/cm^(2),and has good corrosion resistance,smaller internal resistance and stronger charge transfer ability.Compared with the materials without pulse,it can be seen that the assisted preparation method using pulsed electromagnetic field is an effective means to improve the performance of Al-MnO_(2).