State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China.
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China.
Bioelectrochemistry. 2019 Apr;126:72-78. doi: 10.1016/j.bioelechem.2018.07.011. Epub 2018 Jul 17.
Electron transfer efficiency in electroactive biofilm is the limiting factor for bioelectricity output of bioelectrochemical system. Here, carbon felt (CF) is coated with manganese dioxide (MnO) which acts as electron mediator in electroactive biofilm. A wrapping layer of conducting Poly 3,4-ethylenedioxythiophene is developed to protect the MnO and enhance electron transfer efficiency of MnO mediator. The hybrid bioanode (PEDOT/MnO/CF bioanode) delivered the highest electron transfer efficiency (6.3 × 10 mol cm s) and the highest capacitance of 4.78 F, much higher than bare CF bioanode (1.50 ± 0.04 × 10 mol cm s and 0.42 F). As a result, microbial fuel cells could produce a maximum power density of 1534 ± 13 mW m, approximately 57.7% higher than that with the bare carbon felt anode (972 ± 21 mW m). Possible mechanisms are proposed to help understanding the different function of the PEDOT and MnO on the anodic layer. This study introduces an effective method for the fabrication of high performance anode.
电活性生物膜中的电子传递效率是生物电化学系统生物电能输出的限制因素。在这里，碳纤维毡 (CF) 被涂覆了二氧化锰 (MnO)，后者在电活性生物膜中充当电子介质。开发了一层导电聚 3,4-亚乙基二氧噻吩 (PEDOT) 包裹层，以保护 MnO 并提高 MnO 介质的电子传递效率。杂交生物阳极 (PEDOT/MnO/CF 生物阳极) 提供了最高的电子传递效率 (6.3×10molcm s) 和最高的电容 4.78F，远高于裸 CF 生物阳极 (1.50±0.04×10molcm s 和 0.42F)。结果，微生物燃料电池能够产生最高的功率密度为 1534±13mWm，比使用裸碳纤维毡阳极时(972±21mWm)高约 57.7%。提出了可能的机制来帮助理解 PEDOT 和 MnO 在阳极层上的不同功能。本研究介绍了一种制造高性能阳极的有效方法。
