Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran.
Department of Bioengineering, McGill University, Montreal, QC, Canada.
Sci Rep. 2022 May 6;12(1):7417. doi: 10.1038/s41598-022-11472-6.
The presented paper fundamentally investigates the influence of different electron transfer mechanisms, various metal-based electrodes, and a static magnetic field on the overall performance of microfluidic microbial fuel cells (MFCs) for the first time to improve the generated bioelectricity. To do so, as the anode of microfluidic MFCs, zinc, aluminum, tin, copper, and nickel were thoroughly investigated. Two types of bacteria, Escherichia coli and Shewanella oneidensis MR-1, were used as biocatalysts to compare the different electron transfer mechanisms. Interaction between the anode and microorganisms was assessed. Finally, the potential of applying a static magnetic field to maximize the generated power was evaluated. For zinc anode, the maximum open circuit potential, current density, and power density of 1.39 V, 138,181 mA m and 35,294 mW m were obtained, respectively. The produced current density is at least 445% better than the values obtained in previously published studies so far. The microfluidic MFCs were successfully used to power ultraviolet light-emitting diodes (UV-LEDs) for medical and clinical applications to elucidate their application as micro-sized power generators for implantable medical devices.
本文首次从根本上研究了不同电子转移机制、各种基于金属的电极和静态磁场对微流控微生物燃料电池 (MFC) 整体性能的影响，以提高产生的生物电能。为此，锌、铝、锡、铜和镍被彻底研究为微流控 MFC 的阳极。大肠杆菌和希瓦氏菌 MR-1 两种细菌被用作生物催化剂来比较不同的电子转移机制。评估了阳极和微生物之间的相互作用。最后，评估了施加静态磁场以最大化产生功率的潜力。对于锌阳极，获得了 1.39 V 的最大开路电位、138,181 mA m 和 35,294 mW m 的最大电流密度和功率密度。产生的电流密度至少比迄今为止已发表的研究中的值好 445%。微流控 MFC 成功地用于为医疗和临床应用的紫外发光二极管 (UV-LED) 供电，以阐明它们作为可植入医疗设备的微尺寸电源的应用。
