High Power Density from a Miniature Microbial Fuel Cell Using Shewanella oneidensis DSP10

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• 作者：Bradley R. Ringeisen ; Emily Henderson ; Peter K. Wu ; Jeremy Pietron ; Ricky Ray ; Brenda Little ; Justin C. Biffinger ; and Joanne M. Jones-Meehan
• 刊名：Environmental Science & Technology
• 出版年：2006
• 出版时间：April 15, 2006
• 年：2006
• 卷：40
• 期：8
• 页码：2629 - 2634
• 全文大小：225K
• 年卷期：v.40,no.8(April 15, 2006)
• ISSN：1520-5851

文摘

A miniature microbial fuel cell (mini-MFC) is describedthat demonstrates high output power per device cross-section (2.0 cm²) and volume (1.2 cm³). Shewanella oneidensisDSP10 in growth medium with lactate and bufferedferricyanide solutions were used as the anolyte andcatholyte, respectively. Maximum power densities of 24and 10 mW/m² were measured using the true surface areasof reticulated vitreous carbon (RVC) and graphite felt(GF) electrodes without the addition of exogenous mediatorsin the anolyte. Current densities at maximum powerwere measured as 44 and 20 mA/m² for RVC and GF,while short circuit current densities reached 32 mA/m² forGF anodes and 100 mA/m² for RVC. When the powerdensity for GF was calculated using the cross sectionalarea of the device or the volume of the anode chamber, wefound values (3 W/m², 500 W/m³) similar to the maximareported in the literature. The addition of electron mediatorsresulted in current and power increases of 30-100%.These power densities were surprisingly high consideringa pure S. oneidensis culture was used. We found thatthe short diffusion lengths and high surface-area-to-chambervolume ratio utilized in the mini-MFC enhanced powerdensity when compared to output from similar macroscopicMFCs.