微生物燃料电池阳极碳材料对产电性能的影响

Effect of microbial fuel cell anode carbon material on MFC electrogenesis

为了揭示不同的阳极碳材料对微生物燃料电池(microbial fuel cell,MFC)产电性能的影响,以最大功率,阳极电势和内阻作为评价指标,比较了碳纸、碳毡和碳纤维布3种阳极材料的表面积、厚度和密度对微生物燃料电池性能的影响。结果显示,以盐桥连接的微生物燃料电池以碳材料作为阳极有较好的产电性能,在同等试验条件下,碳纤维布产生的电压峰值最高,为700 mV,且其内阻最小,变化稳定。以密度分别为20、55、200 g.m-2的3种材料碳纸、碳毡、碳纤维布作阳极,产生的最大电功率分别为9.36、12.40和37.09 mW,说明阳极碳材料的密度越大产生最大电功率也就越大。

In this paper,the effect of anode material on MFC electrogenesis is discussed,taken max power,anode potential and internal resistance as evaluation indices.The results indicated that the MFC,which was linked by salt bridge,had a better electrogenesis capacity when carbon material was chosen.Under the same condition,voltage spikes could steadily reach 700 mV and was the highest when carbon cloth was used as anode material.The densities of carbon paper,carbon felt and carbon cloth were 20,55 and 200 g·m-2,respectively.MFC max powers,using these three materials as anode material,were 9.36,12.40 and 37.09 mW,respectively.The results show that the higher density of carbon material is used as anode material,the higher max power will be produced.