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Combination of bioelectrochemical systems and electrochemical capacitors: Principles, analysis and opportunities

Combination of bioelectrochemical systems and electrochemical capacitors: Principles, analysis and opportunities
Combination of bioelectrochemical systems and electrochemical capacitors: Principles, analysis and opportunities
Bioelectrochemical systems combine electrodes and reactions driven by microorganisms for many different applications. The conversion of organic material in wastewater into electricity occurs in microbial fuel cells (MFCs). The power densities produced by MFCs are still too low for application. One way of increasing their performance is to combine them with electrochemical capacitors, widely used for charge storage purposes. Capacitive MFCs, i.e. the combination of capacitors and MFCs, allow for energy harvesting and storage and have shown to result in improved power densities, which facilitates the up scaling and application of the technology. This manuscript summarizes the state-of-the-art of combining capacitors with MFCs, starting with the theory and working principle of electrochemical capacitors. We address how different electrochemical measurements can be used to determine (bio)electrochemical capacitance and show how the measurement data can be interpreted. In addition, we present examples of the combination of electrochemical capacitors, both internal and external, that have been used to enhance MFC performance. Finally, we discuss the most promising applications and the main existing challenges for capacitive MFCs.
Microbial fuel cell, Capacitance, Electrical double-layer, Scaling up, Supercapacitor, Power output
0734-9750
Caizan-Juanarena, Leire
51836227-74c6-48dc-9f42-73d660433a3b
Borsje, Casper
5c6763c0-d853-4248-add9-4849bae34ebe
Sleutels, Tom
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Yntema, Doekle
023e67e8-9712-4300-82eb-a7afcfbb00ba
Santoro, Carlo
03549f6d-d57f-4d79-8bae-2d9271aa7371
Ieropoulos, Ioannis
6c580270-3e08-430a-9f49-7fbe869daf13
Soavi, Francesca
ebdd72f5-996d-44e9-a0ac-f29cf580a21e
ter Heijne, Annemiek
cd3c1fb9-6078-4a5c-a5e3-af170af857fa
Caizan-Juanarena, Leire
51836227-74c6-48dc-9f42-73d660433a3b
Borsje, Casper
5c6763c0-d853-4248-add9-4849bae34ebe
Sleutels, Tom
997983f4-f920-4de9-8b9a-8583a0803edc
Yntema, Doekle
023e67e8-9712-4300-82eb-a7afcfbb00ba
Santoro, Carlo
03549f6d-d57f-4d79-8bae-2d9271aa7371
Ieropoulos, Ioannis
6c580270-3e08-430a-9f49-7fbe869daf13
Soavi, Francesca
ebdd72f5-996d-44e9-a0ac-f29cf580a21e
ter Heijne, Annemiek
cd3c1fb9-6078-4a5c-a5e3-af170af857fa

Caizan-Juanarena, Leire, Borsje, Casper, Sleutels, Tom, Yntema, Doekle, Santoro, Carlo, Ieropoulos, Ioannis, Soavi, Francesca and ter Heijne, Annemiek (2020) Combination of bioelectrochemical systems and electrochemical capacitors: Principles, analysis and opportunities. Biotechnology Advances, 39, [107456]. (doi:10.1016/j.biotechadv.2019.107456).

Record type: Review

Abstract

Bioelectrochemical systems combine electrodes and reactions driven by microorganisms for many different applications. The conversion of organic material in wastewater into electricity occurs in microbial fuel cells (MFCs). The power densities produced by MFCs are still too low for application. One way of increasing their performance is to combine them with electrochemical capacitors, widely used for charge storage purposes. Capacitive MFCs, i.e. the combination of capacitors and MFCs, allow for energy harvesting and storage and have shown to result in improved power densities, which facilitates the up scaling and application of the technology. This manuscript summarizes the state-of-the-art of combining capacitors with MFCs, starting with the theory and working principle of electrochemical capacitors. We address how different electrochemical measurements can be used to determine (bio)electrochemical capacitance and show how the measurement data can be interpreted. In addition, we present examples of the combination of electrochemical capacitors, both internal and external, that have been used to enhance MFC performance. Finally, we discuss the most promising applications and the main existing challenges for capacitive MFCs.

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Published date: 2020
Keywords: Microbial fuel cell, Capacitance, Electrical double-layer, Scaling up, Supercapacitor, Power output

Identifiers

Local EPrints ID: 453980
URI: http://eprints.soton.ac.uk/id/eprint/453980
ISSN: 0734-9750
PURE UUID: c70a4e75-5f5f-4ea0-b0a4-6424d9f2e384
ORCID for Ioannis Ieropoulos: ORCID iD orcid.org/0000-0002-9641-5504

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Date deposited: 27 Jan 2022 17:30
Last modified: 28 Apr 2022 02:34

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Contributors

Author: Leire Caizan-Juanarena
Author: Casper Borsje
Author: Tom Sleutels
Author: Doekle Yntema
Author: Carlo Santoro
Author: Francesca Soavi
Author: Annemiek ter Heijne

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