Voltage reversal causes bioanode corrosion in microbial fuel cell stacks
Voltage reversal causes bioanode corrosion in microbial fuel cell stacks
复制标题
电压反转导致微生物燃料电池堆中的生物阳极腐蚀
DOI：
10.1016/j.ijhydene.2017.05.221
复制
发表时间：
2017-11-09
影响因子：
7.2
通讯作者：
Ye, Dingding
中科院分区：
文献类型：
--
作者：
Li, Jun;Li, Hejing;Ye, Dingding
更好地了解电压反转现象及其对发电的长期影响是有效提高微生物燃料电池（MFC）堆电压的关键。本研究将六个表现不平衡的mfc串联起来。在电压反转条件下运行超过100小时后，观察到反向MFC阳极液的浊度和颜色增加。此外，阳极的循环伏安由典型的催化电流变为电容电流。扫描电镜（SEM）显示，生物膜已从阳极表面解离，表明在电压反转下长期工作可能会破坏生物膜，最终导致MFC堆叠失效。x射线衍射（XRD）、扫描电镜（SEM）和能谱分析（EDX）表明，阳极液中的黑色颗粒主要是阳极上脱落的碳，表明碳腐蚀导致了生物膜的失效。(C) 2017氢能源出版有限责任公司，由爱思唯尔有限公司出版版权所有。
A better understanding of voltage reversal phenomenon and its long-term effects on power generation are crucial to efficiently improve the voltage of microbial fuel cell (MFC) stacks. In this study, six MFCs with imbalanced performances were connected in series. After over 100 h of operation under voltage reversal conditions, increased turbidity and color were observed in the anolyte of the reversed MFC. In addition, the cyclic voltammogram of the anode changed form a typical catalytic current to a capacitance current. The scanning electron microscopy (SEM) showed that biofilm was dissociated from the anode surface, indicating that long-term operation under voltage reversal could damage the biofilm and ultimately resulted in the failure of MFC stacks. X-ray diffraction (XRD) and SEM equipped with energy dispersive X-ray spectrometry (EDX) analyses showed that the black particles in the anolyte was mostly carbon exfoliated from the anode, suggesting that carbon corrosion caused the biofilm failure. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.