title: Enhanced performance and capacitance behavior of anode by rolling Fe3O4 into activated carbon in microbial fuel cells.
abstract: Fe(3)O(4) was added into the anode to improve the performance of microbial fuel cells (MFCs). Stainless steel mesh (SSM), activated carbon (AC) with SSM (AcM) and Fe(3)O(4) added AcM (AcFeM) anodes had been made and investigated by electrochemical measurements. The maximum power density of AcFeM anode (809 ± 5 mW/m(2)) is 22% higher than that of AcM (664 ± 17 mW/m(2)), and 56 times higher than that of SSM anode (14 ± 0.3 mW/m(2)). Tafel tests indicate that the anode modified by Fe(3)O(4) is kinetically more advantageous. It is demonstrated for the first time that the capacitance of anode increased after the addition of Fe(3)O(4). With 10 min of interruption, AcFeM exhibites a 41% higher cumulative charge of 3566 ± 32 C/m(2) and a 32% higher net capacitance charge of 389 ± 18 C/m(2) than those of the AcM control (2529 ± 22 and 294 ± 30 C/m(2)), indicating that the improvement of anode performance can be also attributed to the enhancement of capacitance.
authors.affiliation: MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, No. 94 Weijin Road, Nankai District, Tianjin 300071, China.
authors.forename: Xinhong
authors.initials: X
authors.lastname: Peng
authors.forename: Hongbing
authors.initials: H
authors.lastname: Yu
authors.forename: Xin
authors.initials: X
authors.lastname: Wang
authors.forename: Qixing
authors.initials: Q
authors.lastname: Zhou
authors.forename: Shijia
authors.initials: S
authors.lastname: Zhang
authors.forename: Lijuan
authors.initials: L
authors.lastname: Geng
authors.forename: Jingwen
authors.initials: J
authors.lastname: Sun
authors.forename: Zhang
authors.initials: Z
authors.lastname: Cai
mesh_terms: D001674:Bioelectric Energy Sources; D002606:Charcoal / Q000737:chemistry*; D025802:Electric Capacitance; D004566:Electrodes; D005290:Ferric Compounds / Q000737:chemistry*
chemical_list: D005290:Ferric Compounds; D002606:Charcoal; C000499:ferric oxide