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Article

3D-Printed Conductive Polymers as Alternative for Bioelectrochemical Systems Electrodes: Abiotic Study and Biotic Start-Up

by
Alberto Mur-Gorgas
1,
Susana Martínez-Pellitero
2,
Tamara Joglar
1,
Adrián Escapa
1,3 and
Raúl Mateos
1,*
1
Chemical and Environmental Bioprocess Engineering Group, I4 Institute, University of León, 24071 León, Spain
2
Area of Manufacturing Engineering, University of León, 24071 León, Spain
3
Department of Electrical Engineering and Automatic Systems, University of León, 24071 León, Spain
*
Author to whom correspondence should be addressed.
Appl. Sci. 2024, 14(16), 7199; https://doi.org/10.3390/app14167199
Submission received: 24 July 2024 / Revised: 12 August 2024 / Accepted: 14 August 2024 / Published: 15 August 2024
(This article belongs to the Section Additive Manufacturing Technologies)

Abstract

Despite over two decades of intense research into bioelectrochemical systems (BESs), their practical implementation remains unrealized, partly due to the low performance of bioelectrodes. With the introduction of additive manufacturing techniques, the development of a new generation of bioelectrodes with custom-shaped geometries using conductive composites has become feasible. This study examines the potential of using two conductive composites, Poly-lactic acid (PLA) and thermoplastic polyurethane (TPU), for 3D-printed electrodes. Electrochemical characterization reveals that TPU has a charge transfer resistance approximately two orders of magnitude higher than PLA, rendering it unsuitable for bioelectrodes. The presence of triangular patterns enhances the performance of planar electrodes, with optimal results observed for PLA-based electrodes with surface pattern depths between 0.6 and 1.4 mm. Additionally, electrodeposition (ED) of graphene oxide (GO) further improves performance across all cases. During the subsequent biotic start-up, patterned PLA electrodes with a depth of 1.4 mm exhibit higher current. However, these 3D-printed electrodes exhibit degradation after 56 days of operation.
Keywords: bioelectrochemical systems; polymers; electrode manufacturing; abiotic characterization; bioanodes bioelectrochemical systems; polymers; electrode manufacturing; abiotic characterization; bioanodes

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MDPI and ACS Style

Mur-Gorgas, A.; Martínez-Pellitero, S.; Joglar, T.; Escapa, A.; Mateos, R. 3D-Printed Conductive Polymers as Alternative for Bioelectrochemical Systems Electrodes: Abiotic Study and Biotic Start-Up. Appl. Sci. 2024, 14, 7199. https://doi.org/10.3390/app14167199

AMA Style

Mur-Gorgas A, Martínez-Pellitero S, Joglar T, Escapa A, Mateos R. 3D-Printed Conductive Polymers as Alternative for Bioelectrochemical Systems Electrodes: Abiotic Study and Biotic Start-Up. Applied Sciences. 2024; 14(16):7199. https://doi.org/10.3390/app14167199

Chicago/Turabian Style

Mur-Gorgas, Alberto, Susana Martínez-Pellitero, Tamara Joglar, Adrián Escapa, and Raúl Mateos. 2024. "3D-Printed Conductive Polymers as Alternative for Bioelectrochemical Systems Electrodes: Abiotic Study and Biotic Start-Up" Applied Sciences 14, no. 16: 7199. https://doi.org/10.3390/app14167199

APA Style

Mur-Gorgas, A., Martínez-Pellitero, S., Joglar, T., Escapa, A., & Mateos, R. (2024). 3D-Printed Conductive Polymers as Alternative for Bioelectrochemical Systems Electrodes: Abiotic Study and Biotic Start-Up. Applied Sciences, 14(16), 7199. https://doi.org/10.3390/app14167199

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