Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-2792
Publication type: Conference poster
Type of review: Editorial review
Title: A multicomponent diffusion model for organic redox flow battery membranes
Authors : Mourouga, Gaël
Sansone, Caterina
Alloin, Fannie
Iojoiu, Cristina
Schumacher, Jürgen
DOI : 10.21256/zhaw-2792
Proceedings: 16th symposium on modeling and experimental validation of electrochemical energy technologies (ModVal 2019) : book of abstracts
Editors of the parent work: Krewer, Ulrike
Laue, Vincent
Redeker, Andreas
Conference details: ModVal 2019, Braunschweig, Germany, 12-13 March 2019
Issue Date: 2019
Publisher / Ed. Institution : Technische Universität Braunschweig
Language : English
Subjects : Organic redox flow batteries; Membrane modeling and simulation
Subject (DDC) : 621.3: Electrical engineering and electronics
Abstract: The all-quinone organic redox flow battery shows promise as a low-cost, sustainable energy storage device. As most flow batteries, membranes play a critical role in the performance and cycling stability of the device. In this work, we aim to characterize the transport processes in cation exchange membranes via multicomponent diffusion theory in order to predict crossover rates, and estimate trade-offs between performance and stability. Characterization experiments on the membranes (namely: conductivity, proton transport number, electro-osmotic coefficient and permeability coefficient for quinones) allow to establish a multicomponent diffusion system of equations, solved using MATLAB. The model is validated with crossover fluxs measurements under varying conditions. The influence of thickness, water content and conductivity is assessed, for different commercial membranes (Nafion® and Fumasep). Their impact on cell performance is estimated through an in-house 1D electro-chemical model of the cells developed using COMSOL Multiphysics. This model accounts for the kinetics of the redox reactions happening at the electrode/electrolyte interface (taking in account mass and charge transports), in a flow-through graphite felt electrode with 0.2M anthraquinone (negative side) and 0.2M benzoquinone (positive side) dissolved in sulfuric acid. The model is validated using cell testing equipment provided by JenaBatteries under the scope of the FlowCamp project.
Further description : Acknowledgements: This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement no. 765289. Project website: www.flowcamp-project.eu
URI: https://digitalcollection.zhaw.ch/handle/11475/16162
Fulltext version : Accepted version
License (according to publishing contract) : Not specified
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Published as part of the ZHAW project : Redox Flow Battery Campus
Appears in Collections:Publikationen School of Engineering

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