Time behavior and capacitance analysis of nano-Fe3O4 added microbial fuel cells.
Time behavior and capacitance analysis of nano-Fe3O4 added microbial fuel cells.
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DOI：
10.1016/j.biortech.2013.07.037
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发表时间：
2013-09
影响因子：
11.4
通讯作者：
Xinhong Peng;Hongbing Yu;Lina Ai;Nan Li;Xin Wang
中科院分区：
文献类型：
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作者：
Xinhong Peng;Hongbing Yu;Lina Ai;Nan Li;Xin Wang
在微生物燃料电池(MFC)中，纳米Fe3O4的加入有利于提高阳极的暂态电荷存储，同时也有利于提高MFC的功率性能。结果表明，添加Fe3O4的活性炭阳极与添加Fe3O4的活性炭阳极相比，阳极的开路电位和电流都有所增加，说明Fe3O4虽然在热力学上限制了阳极的电位，但却动态地加速了阳极的电子转移。净存储容量最初增加，然后下降，在开路间隔20分钟时，最大容量分别为574.6℃/m−2(AcFem)和459C/m−2(ACm)。Fe3O4/Fe(II)可能以固态电子穿梭的形式暂时储存电荷。
The addition of nano Fe3O4is beneficial to boost the transient charge storage of the anode accompanying with the enhancement of power performance in microbial fuel cells (MFCs) in our previous study. Here we found that both the anodic open circuit potential and the current increased when comparing the AcFeM (Fe3O4added activated carbon anode) with the AcM (activated carbon anode), indicating that the Fe3O4dynamically accelerated the anodic electron transfer although it thermodynamically limited the anode potential. The net storage capacity initially increased followed by a decrease with the maximum capacitance of 574.6 C m−2(AcFeM) and 459 C m−2(AcM) under 20 min of open circuit interval. The Fe3O4/Fe(II) possibly stored charges temporarily as a solid-state electron shuttle.