Citation

BibTex format

@article{Simon:2022:10.1016/j.apenergy.2021.117678,
author = {Simon, BA and Gayon-Lombardo, A and Pino-Muñoz, CA and Wood, CE and Tenny, KM and Greco, KV and Cooper, SJ and Forner-Cuenca, A and Brushett, FR and Kucernak, AR and Brandon, NP},
doi = {10.1016/j.apenergy.2021.117678},
journal = {Applied Energy},
pages = {1--22},
title = {Combining electrochemical and imaging analyses to understand the effect of electrode microstructure and electrolyte properties on redox flow batteries},
url = {http://dx.doi.org/10.1016/j.apenergy.2021.117678},
volume = {306},
year = {2022}
}
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TY  - JOUR
AB  - Reducing the cost of redox flow batteries (RFBs) is critical to achieving broad commercial deployment of largescale energy storage systems. This can be addressed in a variety of ways, such as reducing component costs orimproving electrode design. The aim of this work is to better understand the relationship between electrodemicrostructure and performance. Four different commercially available carbon electrodes were examined – twocloths and two papers (from AvCarb® and Freudenberg Performance Materials) – and a comprehensive study ofthe different pore-scale and mass-transport processes is presented to elucidate their effect on the overall cellperformance. Electrochemical measurements were carried out in a non-aqueous organic flow-through RFB withthese different electrodes, using two supporting solvents (propylene carbonate and acetonitrile) and at a varietyof flow rates. Electrode samples were scanned using X-ray computed tomography, and a customised segmentation technique was employed to extract several microstructural parameters. A pore network model was used tocalculate the pressure drops and permeabilities, which were found to be within 1.26 × 10− 11 and 1.65 × 10− 11m2 for the papers and between 8.61 × 10− 11 and 10.6 × 10− 11 m2 for the cloths. A one-dimensional model wasdeveloped and fit to polarisation measurements to obtain mass-transfer coefficients, km, which were found to bebetween 1.01 × 10− 6 and 5.97 × 10− 4 m s− 1 with a subsequent discussion on Reynolds and Sherwood numbercorrelations. This work suggests that, for these fibrous materials, permeability correlates best with electrochemical cell performance. Consequently, the carbon cloths with the highest permeability and highest masstransfer coefficients, displayed better performances.
AU  - Simon,BA
AU  - Gayon-Lombardo,A
AU  - Pino-Muñoz,CA
AU  - Wood,CE
AU  - Tenny,KM
AU  - Greco,KV
AU  - Cooper,SJ
AU  - Forner-Cuenca,A
AU  - Brushett,FR
AU  - Kucernak,AR
AU  - Brandon,NP
DO  - 10.1016/j.apenergy.2021.117678
EP  - 22
PY  - 2022///
SN  - 0306-2619
SP  - 1
TI  - Combining electrochemical and imaging analyses to understand the effect of electrode microstructure and electrolyte properties on redox flow batteries
T2  - Applied Energy
UR  - http://dx.doi.org/10.1016/j.apenergy.2021.117678
UR  - https://www.sciencedirect.com/science/article/pii/S0306261921010382
UR  - http://hdl.handle.net/10044/1/92905
VL  - 306
ER  -
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