微生物燃料电池
阳极
碳纤维
材料科学
化学工程
功率密度
地杆菌
掺杂剂
兴奋剂
阴极
化学
电极
复合材料
细菌
功率(物理)
光电子学
物理化学
生物膜
遗传学
工程类
物理
复合数
生物
量子力学
作者
Yixuan Wang,Chuan-Shu He,Wenqiang Li,Wenming Zong,Zhenghao Li,Yuan Li,Gongming Wang,Yang Mu
标识
DOI:10.1016/j.cej.2020.125848
摘要
High power generation with low capital cost is still a great challenge for the practical application of microbial fuel cells. In this work, the efficient three-dimensional N-doped macroporous carbon foam anodes were fabricated using naturally abundant nitrogenous corncobs and successfully adopted in microbial fuel cells with mixed-culture inoculation. The optimized three-dimensional N-doped macroporous carbon foam bioanode achieved a power density of 4.99 ± 0.02 W/m2 and a current density of 12.30 ± 0.01 A/m2, which represents the best performance among the reported carbon-based ones for microbial fuel cells to date. Such enhancements would likely be due to not only the good biocompatibility of three-dimensional N-doped macroporous carbon foams for the enrichment of electroactive Geobacter, but also the enhancement of extracellular electron transfer efficiency of the Geobacter with anode doping of N atoms especially for pyrrolic N, as indicated by density functional theory calculation. This study provides valuable insights for the design and optimization of low-cost carbon-based anodes for high-performance microbial fuel cells.
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