College of Materials Science and Engineering, Wuhan Textile University , Wuhan 430200, China.
College of Chemistry, Chemical Engineering and Biotechnology, Donghua University , Shanghai 201620, China.
Environ Sci Technol. 2016 Jul 19;50(14):7889-95. doi: 10.1021/acs.est.6b00648. Epub 2016 Jun 23.
Microbial fuel cells (MFCs) encompass complex bioelectrocatalytic reactions that converting chemical energy of organic compounds to electrical energy. Improving the anode configuration is thought to be a critical step for enhancing MFCs performance. In present study, a hierarchically structured textile polypyrrole/poly(vinyl alcohol-co-polyethylene) nanofibers/poly(ethylene terephthalate) (referred to PPy/NFs/PET) is shown to be excellent anode for MFCs. This hierarchical PPy/NFs/PET anode affords an open porous and three-dimensional interconnecting conductive scaffold with larger surface roughness, facilitating microbial colonization and electron transfer from exoelectrogens to the anode. The mediator-less MFC equipped with PPy/NFs/PET anode achieves a remarkable maximum power density of 2420 mW m(-2) with Escherichia coli as the microbial catalyst at the current density of 5500 mA m(-2), which is approximately 17 times higher compared to a reference anode PPy/PET (144 mW m(-2)). Considering the low cost, low weight, facile fabrication, and good winding, this PPy/NFs/PET textile anode promises a great potential for high-performance and cost-effective MFCs in a large scale.
微生物燃料电池（MFC）包含将有机化合物的化学能转化为电能的复杂生物电催化反应。提高阳极结构被认为是提高 MFC 性能的关键步骤。在本研究中，分层结构的纺织聚吡咯/聚乙烯醇-共-聚乙烯/聚对苯二甲酸乙二醇酯（简称 PPy/NFs/PET）被证明是 MFC 的优异阳极。这种分层的 PPy/NFs/PET 阳极提供了一个开放多孔和三维互连的导电支架，具有更大的表面粗糙度，有利于微生物的定殖和电子从外电子体到阳极的转移。在没有介体的情况下，配备 PPy/NFs/PET 阳极的 MFC 在电流密度为 5500 mA m(-2)时，以大肠杆菌作为微生物催化剂，可实现 2420 mW m(-2)的显著最大功率密度，比参考阳极 PPy/PET（144 mW m(-2)）高约 17 倍。考虑到低成本、低重量、易于制造和良好的缠绕性，这种 PPy/NFs/PET 纺织阳极有望在大规模应用中为高性能和经济高效的 MFC 提供巨大潜力。
