MESSAI.iO

AI summary

70% confidence

Researchers developed a strategy to bridge the power density gap between microfluidic and macroscale microbial fuel cells by improving technology, establishing new performance benchmarks, and normalizing comparisons across scales.

Generated by MESSAI extraction pipeline · review against source PDF

Generic MFCRepresentative model
Click to animate flow
loading 3D model…

Representative MFC — matched on the paper’s system type only, not its reactor or geometry.

Extraction

Reported parameters

4 extracted values

View extracted values

Open in lab for full controls, parameter editing, and template overlays.

Open in lab →

What they did

System
MFC

What worked

No outcome metrics extracted yet.

Abstract

In addition to offering a promising approach for niche applications in environmental sensing and portable power sources, microfluidic microbial fuel cells (MFCs) can also accelerate the development of mainstream energy applications through studies into fundamental mechanisms and optimization, without complications from nutrient cycling, membrane fouling, or uncontrollable concentration gradients. However, the main hurdle in leveraging microfluidic MFCs for discovery and optimization is their underperformance compared to macrosystems on certain key metrics, notably area-normalized power. To bridge this gap, we showcase a strategy that focuses on (i) technology improvements, (ii) establishment of new performance benchmarks, and (iii) presentation of a universally applicable normalization method for direct comparisons across all MFC scales and that complements areal power densities. Using a pure-culture Geobacter sulfurreducens electroactive biofilm (EAB) applied to a new system that adheres to the strategy above, we observed optimal anode colonization, resulting in the highest recorded power density for a microfluidic MFC of 3.88 W m⁻² (24.37 kW m⁻³) and a normalized energy recovery (0.21 kWh m⁻³) that nearly matches the average value observed in macrosystems. With these results, the performance gap between micro- and macroscale MFCs is closed, and a road map to move forward is presented.

Key findings

  • Optimal anode colonization was achieved in a microfluidic MFC using a pure-culture Geobacter sulfurreducens electroactive biofilm.
  • The highest recorded power density for a microfluidic MFC was 3.88 W m⁻² (24.37 kW m⁻³).
  • A universally applicable normalization method was presented for direct comparisons across all MFC scales.

Keywords

Microbial fuel cellGeobacter sulfurreducensMicrofluidicsGeobacterPower densityBiochemical engineering

Identifiers

DOI
10.26434/chemrxiv-2023-g5brl
Journal
ChemRxiv
Year
2023