Mn_3O_4修饰石墨阳极MFC的产电性能与阳极电容特性

Electricity Production and Anode Capacitive Characteristics of Microbial Fuel Cell with Mn_3O_4-Coated Anode

制备了Mn_3O_4修饰石墨阳极。在微生物燃料电池(MFC)中研究了Mn_3O_4对MFC产电性能及阳极电容特性的影响。Mn_3O_4修饰阳极的MFC最大功率密度为255mW/m2,比对照组提高了25%。Mn_3O_4修饰阳极的MFC比电容为14.7mF/cm2,比对照组提高了88%。在电化学阻抗(EIS)测试中,创建了R(Q(R(QR)))(QR)模型,对MFC内阻与电容的组成和大小进行了分析。测试表明,Mn_3O_4修饰电极降低了生物膜和电极界面的电荷转移内阻,增大了生物膜和电极界面的赝电容,从而提高了MFC的产电能力和间歇式放电MFC的能量利用率。

Mn3O4-coated electrodes were prepared. They were used as the anodes of the microbial fuel cells （MFC） to study the effect of Mn304 on electricity production and anode capacitive characteristics. The results showed that the maximum power density of the MFC with Mn304-coated anode was 255 mW/m2 , 25% higher than that of the bare anode. Cyclic voltammetry tests showed that the specific capacitance of Mn304-coated anode was 14. 7 mF/cm2 ,88% larger than that of the bare anode. The R（Q（R（QR））） （QR） model was created to analysis the formation and figure of internal resistance and capacitive in EIS test. Tests showed that Mn304-coated electrodes reduced the internal resistance of charge transfer and increased the pseudo capacitance between biofilm and electrode interface, and thus improved the power production capacity of MFC and the energy efficiency of batch mode MFC.