文献类型：期刊文献

英文题名：Anodic concentration loss and impedance characteristics in rotating disk electrode microbial fuel cells

作者：Shen, Liye[1];Ma, Jingxing[1];Song, Pengfei[2];Lu, Zhihao[1];Yin, Yao[1];Liu, Yongdi[1];Cai, Lankun[1];Zhang, Lehua[1]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, 130 Meilong Rd, Shanghai, Peoples R China;[2]Thomas Nelson Community Coll, Dept Biol, Hampton, VA 23666 USA

年份：2016

卷号：39

期号：10

起止页码：1627

外文期刊名：BIOPROCESS AND BIOSYSTEMS ENGINEERING

收录：;EI(收录号：20162402499151);WOS:【SCI-EXPANDED(收录号:WOS:000382117800013)】；

基金：This work was supported by the National Natural Science Foundation of China (NSFC) (20906026) and Shanghai Pujiang Program (09PJ1402900).

语种：英文

外文关键词：Concentration loss; Electrochemical impedance spectroscopy (EIS); Microbial fuel cells (MFCs); Rotating disk electrode

摘要：A rotating disk electrode (RDE) was used to investigate the concentration loss and impedance characteristics of anodic biofilms in microbial fuel cells (MFCs). Amperometric time-current analysis revealed that at the rotation rate of 480 rpm, a maximum current density of 168 A mu A cm(-2) can be achieved, which was 22.2 % higher than when there was no rotation. Linear sweep voltammetry and electrochemical impedance spectroscopy tests showed that when the anodic potential was set to -300 mV vs. Ag/AgCl reference, the power densities could increase by 59.0 %, reaching 1385 mW m(-2), the anodic resistance could reduce by 19 %, and the anodic capacitance could increase by 36 %. These results concur with a more than 85 % decrease of the diffusion layer thickness. Data indicated that concentration loss, diffusion layer thickness, and the mixing velocity play important roles in anodic resistance reduction and power output of MFCs. These findings could be helpful to the design of future industrial-scale MFCs with mixed bacteria biofilms.