Enhanced performance and capacitance behavior of anode by rolling Fe3O4 into activated carbon in microbial fuel cells.
Enhanced performance and capacitance behavior of anode by rolling Fe3O4 into activated carbon in microbial fuel cells.
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DOI：
10.1016/j.biortech.2012.06.021
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发表时间：
2012-10
影响因子：
11.4
通讯作者：
Xinhong Peng;Hongbing Yu;Xin Wang;Qixing Zhou;Shijia Zhang;Lijuan Geng;Jingwen Sun;Z. Cai
中科院分区：
文献类型：
--
作者：
Xinhong Peng;Hongbing Yu;Xin Wang;Qixing Zhou;Shijia Zhang;Lijuan Geng;Jingwen Sun;Z. Cai
为了提高微生物燃料电池（MFC）的性能，在阳极中添加Fe 3 O 4。制备了不锈钢网（SSM）、含SSM的活性炭（AC）（AcM）和添加Fe 3 O 4的活性炭（AcFeM）阳极，并对其电化学性能进行了研究。AcFeM阳极的最大功率密度（809± 5 mW/m2）比AcM阳极（664± 17 mW/m2）高22%，比SSM阳极（14±0.3mW/m2）高56倍。Tafel试验表明，Fe_3O_4改性的阳极在动力学上更有优势。首次证明了添加Fe_3O_4后阳极的电容量增加。在10 min的中断时间内，AcFeM的累积电荷量为3566± 32 C/m2，比AcM对照组（2529±22 C/m2和294± 30 C/m2）高41%，净电容电荷量为389± 18 C/m2，表明阳极性能的改善也可归因于电容量的增加。
Fe3O4was added into the anode to improve the performance of microbial fuel cells (MFCs). Stainless steel mesh (SSM), activated carbon (AC) with SSM (AcM) and Fe3O4added AcM (AcFeM) anodes had been made and investigated by electrochemical measurements. The maximum power density of AcFeM anode (809±5mW/m2) is 22% higher than that of AcM (664±17mW/m2), and 56 times higher than that of SSM anode (14±0.3mW/m2). Tafel tests indicate that the anode modified by Fe3O4is kinetically more advantageous. It is demonstrated for the first time that the capacitance of anode increased after the addition of Fe3O4. With 10min of interruption, AcFeM exhibites a 41% higher cumulative charge of 3566±32C/m2and a 32% higher net capacitance charge of 389±18C/m2than those of the AcM control (2529±22 and 294±30C/m2), indicating that the improvement of anode performance can be also attributed to the enhancement of capacitance.