The effect of external resistance on biofilm formation and internal resistance in Shewanella inoculated microbial fuel cells

Ting Liu; Yang Yang Yu; Dongzhe Li; Hao Song; Xiaoli Yan; Wei Ning Chen

doi:10.1039/c5ra26125b

The effect of external resistance on biofilm formation and internal resistance in Shewanella inoculated microbial fuel cells

Ting Liu, Yang Yang Yu, Dongzhe Li, Hao Song, Xiaoli Yan, Wei Ning Chen^*

^*Corresponding author for this work

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

50 Citations (Scopus)

Abstract

External resistance is one of the important factors that affect the performance of microbial fuel cells (MFCs). In this study, bioelectrochemical and biofilm characterization was conducted for Shewanella oneidensis MR-1 inoculated MFCs with 250 Ω, 500 Ω, 2 kΩ, 6 kΩ and 22 kΩ resistors. Overall, a smaller external resistance resulted in a higher maximum power density and more riboflavin secretion. A maximum power density of 136.8 ± 3.1 mW m^-2 was achieved when MFCs were operated with a 500 Ω resistor, which was 3.7 times that with a 22 kΩ resistor. Electrochemical impedance spectra (EIS) analysis verified an increased internal resistance with a higher external resistance. Meanwhile, more biofilm mass and extracellular polymer substances (EPS) were confirmed on the MFC anode with a higher external resistance.

Original language	English
Pages (from-to)	20317-20323
Number of pages	7
Journal	RSC Advances
Volume	6
Issue number	24
DOIs	https://doi.org/10.1039/c5ra26125b
Publication status	Published - 2016
Externally published	Yes

Bibliographical note

Publisher Copyright:
© The Royal Society of Chemistry 2016.

ASJC Scopus Subject Areas

General Chemistry
General Chemical Engineering

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10.1039/c5ra26125b

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title = "The effect of external resistance on biofilm formation and internal resistance in Shewanella inoculated microbial fuel cells",

abstract = "External resistance is one of the important factors that affect the performance of microbial fuel cells (MFCs). In this study, bioelectrochemical and biofilm characterization was conducted for Shewanella oneidensis MR-1 inoculated MFCs with 250 Ω, 500 Ω, 2 kΩ, 6 kΩ and 22 kΩ resistors. Overall, a smaller external resistance resulted in a higher maximum power density and more riboflavin secretion. A maximum power density of 136.8 ± 3.1 mW m-2 was achieved when MFCs were operated with a 500 Ω resistor, which was 3.7 times that with a 22 kΩ resistor. Electrochemical impedance spectra (EIS) analysis verified an increased internal resistance with a higher external resistance. Meanwhile, more biofilm mass and extracellular polymer substances (EPS) were confirmed on the MFC anode with a higher external resistance.",

author = "Ting Liu and Yu, {Yang Yang} and Dongzhe Li and Hao Song and Xiaoli Yan and Chen, {Wei Ning}",

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doi = "10.1039/c5ra26125b",

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T1 - The effect of external resistance on biofilm formation and internal resistance in Shewanella inoculated microbial fuel cells

AU - Liu, Ting

AU - Yu, Yang Yang

AU - Li, Dongzhe

AU - Song, Hao

AU - Yan, Xiaoli

AU - Chen, Wei Ning

PY - 2016

Y1 - 2016

N2 - External resistance is one of the important factors that affect the performance of microbial fuel cells (MFCs). In this study, bioelectrochemical and biofilm characterization was conducted for Shewanella oneidensis MR-1 inoculated MFCs with 250 Ω, 500 Ω, 2 kΩ, 6 kΩ and 22 kΩ resistors. Overall, a smaller external resistance resulted in a higher maximum power density and more riboflavin secretion. A maximum power density of 136.8 ± 3.1 mW m-2 was achieved when MFCs were operated with a 500 Ω resistor, which was 3.7 times that with a 22 kΩ resistor. Electrochemical impedance spectra (EIS) analysis verified an increased internal resistance with a higher external resistance. Meanwhile, more biofilm mass and extracellular polymer substances (EPS) were confirmed on the MFC anode with a higher external resistance.

AB - External resistance is one of the important factors that affect the performance of microbial fuel cells (MFCs). In this study, bioelectrochemical and biofilm characterization was conducted for Shewanella oneidensis MR-1 inoculated MFCs with 250 Ω, 500 Ω, 2 kΩ, 6 kΩ and 22 kΩ resistors. Overall, a smaller external resistance resulted in a higher maximum power density and more riboflavin secretion. A maximum power density of 136.8 ± 3.1 mW m-2 was achieved when MFCs were operated with a 500 Ω resistor, which was 3.7 times that with a 22 kΩ resistor. Electrochemical impedance spectra (EIS) analysis verified an increased internal resistance with a higher external resistance. Meanwhile, more biofilm mass and extracellular polymer substances (EPS) were confirmed on the MFC anode with a higher external resistance.

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The effect of external resistance on biofilm formation and internal resistance in Shewanella inoculated microbial fuel cells

Abstract

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