Ding Qian, Cao Yingxiu, Li Feng, Lin Tong, Chen Yuanyuan, Chen Zheng, Song Hao
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China.
Sheng Wu Gong Cheng Xue Bao. 2021 Jan 25;37(1):1-14. doi: 10.13345/j.cjb.200253.
Microbial fuel cell (MFC) is a bioelectrochemical device, that enables simultaneous wastewater treatment and energy generation. However, a few issues such as low output power, high ohmic internal resistance, and long start-up time greatly limit MFCs' applications. MFC anode is the carrier of microbial attachment, and plays a key role in the generation and transmission of electrons. High-quality bioelectrodes have developed into an effective way to improve MFC performance. Conjugated polymers have advantages of low cost, high conductivity, chemical stability and good biocompatibility. The use of conjugated polymers to modify bioelectrodes can achieve a large specific surface area and shorten the charge transfer path, thereby achieving efficient biological electrochemical performance. In addition, bacteria can be coated with nano-scale conjugated polymer and effectively transfer the electrons generated by cells to electrodes. This article reviews the recently reported applications of conjugated polymers in microbial fuel cells, focusing on the MFC anode materials modified by conjugated polymers. This review also systematically analyzes the advantages and limitations of conjugated polymers, and how these composite hybrid bioelectrodes solve practical issues such as low energy output, high inner resistance, and long starting time.
微生物燃料电池（MFC）是一种生物电化学装置，能够同时实现废水处理和能源生成。然而，诸如低输出功率、高欧姆内阻和长启动时间等一些问题极大地限制了MFC的应用。MFC阳极是微生物附着的载体，在电子的产生和传输中起关键作用。高质量的生物电极已发展成为提高MFC性能的有效途径。共轭聚合物具有成本低、导电性高、化学稳定性好和生物相容性佳等优点。使用共轭聚合物修饰生物电极可实现大比表面积并缩短电荷转移路径，从而实现高效的生物电化学性能。此外，细菌可被包覆纳米级共轭聚合物，并有效地将细胞产生的电子转移至电极。本文综述了最近报道的共轭聚合物在微生物燃料电池中的应用，重点关注共轭聚合物修饰的MFC阳极材料。本综述还系统分析了共轭聚合物的优点和局限性，以及这些复合混合生物电极如何解决诸如低能量输出、高内阻和长启动时间等实际问题。
