A μl-scale micromachined microbial fuel cell having high power density

Seokheun Choi; Hyung Sool Lee; Yongmo Yang; Prathap Parameswaran; Cesar Torres; Bruce Rittmann; Junseok Chae

doi:10.1039/c0lc00494d

A μl-scale micromachined microbial fuel cell having high power density

Seokheun Choi, Hyung Sool Lee, Yongmo Yang, Prathap Parameswaran, Cesar Torres, Bruce Rittmann, Junseok Chae

Research output: Contribution to journal › Article › peer-review

128 Scopus citations

Abstract

We report a MEMS (Micro-Electro-Mechanical Systems)-based microbial fuel cell (MFC) that produces a high power density. The MFC features 4.5-μL anode/cathode chambers defined by 20-μm-thick photo-definable polydimethylsiloxane (PDMS) films. The MFC uses a Geobacter-enriched mixed bacterial culture, anode-respiring bacteria (ARB) that produces a conductive biofilm matrix. The MEMS MFC generated a maximum current density of 16000 μA cm^-3 (33 μA cm^-2) and power density of 2300 μW cm^-3 (4.7 μW cm^-2), both of which are substantially greater than achieved by previous MEMS MFCs. The coulombic efficiency of the MEMS MFC was at least 31%, by far the highest value among reported MEMS MFCs. The performance improvements came from using highly efficient ARB, minimizing the impact of oxygen intrusion to the anode chamber, having a large specific surface area that led to low internal resistance.

Original language	English (US)
Pages (from-to)	1110-1117
Number of pages	8
Journal	Lab on a Chip
Volume	11
Issue number	6
DOIs	https://doi.org/10.1039/c0lc00494d
State	Published - Mar 21 2011

ASJC Scopus subject areas

Bioengineering
Biochemistry
Chemistry(all)
Biomedical Engineering

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title = "A μl-scale micromachined microbial fuel cell having high power density",

abstract = "We report a MEMS (Micro-Electro-Mechanical Systems)-based microbial fuel cell (MFC) that produces a high power density. The MFC features 4.5-μL anode/cathode chambers defined by 20-μm-thick photo-definable polydimethylsiloxane (PDMS) films. The MFC uses a Geobacter-enriched mixed bacterial culture, anode-respiring bacteria (ARB) that produces a conductive biofilm matrix. The MEMS MFC generated a maximum current density of 16000 μA cm-3 (33 μA cm-2) and power density of 2300 μW cm-3 (4.7 μW cm-2), both of which are substantially greater than achieved by previous MEMS MFCs. The coulombic efficiency of the MEMS MFC was at least 31%, by far the highest value among reported MEMS MFCs. The performance improvements came from using highly efficient ARB, minimizing the impact of oxygen intrusion to the anode chamber, having a large specific surface area that led to low internal resistance.",

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AU - Choi, Seokheun

AU - Lee, Hyung Sool

AU - Yang, Yongmo

AU - Parameswaran, Prathap

AU - Torres, Cesar

AU - Rittmann, Bruce

AU - Chae, Junseok

PY - 2011/3/21

Y1 - 2011/3/21

N2 - We report a MEMS (Micro-Electro-Mechanical Systems)-based microbial fuel cell (MFC) that produces a high power density. The MFC features 4.5-μL anode/cathode chambers defined by 20-μm-thick photo-definable polydimethylsiloxane (PDMS) films. The MFC uses a Geobacter-enriched mixed bacterial culture, anode-respiring bacteria (ARB) that produces a conductive biofilm matrix. The MEMS MFC generated a maximum current density of 16000 μA cm-3 (33 μA cm-2) and power density of 2300 μW cm-3 (4.7 μW cm-2), both of which are substantially greater than achieved by previous MEMS MFCs. The coulombic efficiency of the MEMS MFC was at least 31%, by far the highest value among reported MEMS MFCs. The performance improvements came from using highly efficient ARB, minimizing the impact of oxygen intrusion to the anode chamber, having a large specific surface area that led to low internal resistance.

AB - We report a MEMS (Micro-Electro-Mechanical Systems)-based microbial fuel cell (MFC) that produces a high power density. The MFC features 4.5-μL anode/cathode chambers defined by 20-μm-thick photo-definable polydimethylsiloxane (PDMS) films. The MFC uses a Geobacter-enriched mixed bacterial culture, anode-respiring bacteria (ARB) that produces a conductive biofilm matrix. The MEMS MFC generated a maximum current density of 16000 μA cm-3 (33 μA cm-2) and power density of 2300 μW cm-3 (4.7 μW cm-2), both of which are substantially greater than achieved by previous MEMS MFCs. The coulombic efficiency of the MEMS MFC was at least 31%, by far the highest value among reported MEMS MFCs. The performance improvements came from using highly efficient ARB, minimizing the impact of oxygen intrusion to the anode chamber, having a large specific surface area that led to low internal resistance.

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A μl-scale micromachined microbial fuel cell having high power density

Abstract

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