Hierarchically Three-Dimensional Nanofiber Based Textile with High Conductivity and Biocompatibility As a Microbial...

Area of Science:

• Bioelectrochemistry
• Materials Science
• Renewable Energy

Background:

• Microbial fuel cells (MFCs) convert chemical energy to electrical energy via bioelectrocatalytic reactions.
• Anode design is crucial for enhancing MFC efficiency.
• Developing advanced anode materials is key for practical MFC applications.

Purpose of the Study:

• To develop and evaluate a novel hierarchical textile anode for MFCs.
• To investigate the performance enhancement of MFCs using a PPy/NFs/PET anode.
• To assess the potential of the new anode for large-scale MFC applications.

Main Methods:

• Fabrication of a hierarchical polypyrrole/poly(vinyl alcohol-co-polyethylene) nanofibers/poly(ethylene terephthalate) (PPy/NFs/PET) textile anode.
• Characterization of the anode's porous, conductive, and surface properties.
• Testing the mediator-less MFC performance with Escherichia coli using the novel anode.

Main Results:

• The PPy/NFs/PET anode provides an open, 3D conductive scaffold that enhances microbial colonization and electron transfer.
• The MFC equipped with the PPy/NFs/PET anode achieved a maximum power density of 2420 mW m(-2), 17 times higher than the reference PPy/PET anode (144 mW m(-2)).
• High current density of 5500 mA m(-2) was achieved with Escherichia coli.

Conclusions:

• The hierarchical PPy/NFs/PET textile anode significantly improves MFC performance.
• The anode's structure facilitates efficient microbial activity and electron transfer.
• This cost-effective, lightweight, and easily fabricated anode shows great promise for scalable MFC technology.