Electrochemical performance of microbial fuel cell with graphene oxide and polyaniline modified cathode
LIU Shi-yu1,2, WANG Rong-chang1,2, MA Cui-xiang1,2, ZHOU Xin-yi1,2, YANG Dian-hai1
1. Key Laboratory of Yangtze Aquatic Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;
2. State Key Laboratory of Pollution Control and Resource Reuse, Institute of Biofilm Technology, Tongji University, Shanghai 200092, China
In microbial fuel cells (MFC), the cathodic reaction rate of oxygen reduction as an electron acceptor is slow, causing a loss of cathode potential. Polyaniline and graphene oxide are used to modify the MFC cathode, which can enhance the oxygen reduction rate and decrease the cathode potential loss. Scanning Electron Microscopy (SEM), X-ray Diffraction Analysis (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS) were used to investigate the modification of an MFC cathode by polyaniline and graphene oxide and to quantify the improvement if its electrochemical performance. The results show that the oxygen reduction peak potential of the modified electrode is the highest and the electroactive area of the CV text is the largest when the concentration of polyaniline is 0.1M and that the optimum concentration of graphene oxide is 0.1~0.12g/L. This indicates that the internal resistance of the modified cathode is minimized. It is concluded that by modifying the cathode with graphene and polyaniline, the MFC can exhibit higher electrochemical activity, higher output voltage and capacitance. The study is beneficial for ameliorating the application and operation of microbial fuel cells.
刘诗彧, 王荣昌, 马翠香, 周欣逸, 杨殿海. 氧化石墨烯与聚苯胺修饰阴极的微生物燃料电池电化学性能[J]. 中国环境科学, 2019, 39(9): 3866-3871.
LIU Shi-yu, WANG Rong-chang, MA Cui-xiang, ZHOU Xin-yi, YANG Dian-hai. Electrochemical performance of microbial fuel cell with graphene oxide and polyaniline modified cathode. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(9): 3866-3871.
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