Soutenance de thèse de M Misgina Tilahun Tsehaye
M. Misgina Tilahun Tsehaye soutiendra sa thèse intitulée
" Development of Anion Exchange Membranes for Aqueous Organic Redox and Zinc Slurry-Air Flow Batteries"
Abstract
Redox flow batteries, in particular, aqueous organic redox flow batteries (AORFBs) and Zinc (Zn) slurry-air flow batteries are considered to be very attractive candidates for large-scale electricity storage due to their safety and environmental friendliness, economic feasibility and high storage capacity. In these batteries, the membrane allows the transport of ions between the catholyte and the anolyte while providing a physical barrier between the two compartments in order to prevent electrical short circuits. The performance, lifespan and cost of these batteries are greatly affected by the physicochemical properties and type of the employed membrane. However, a critical discussion of the state-of-the-art studies on membranes showed that the research and development of appropriate membranes for these batteries has received insufficient attention.
In this PhD thesis, aiming at first understanding the correlations between the membranes properties and cell performances, commercial porous and prepared anion exchange membranes were ex-situ characterized and tested in the Zn slurry-air flow battery and AORFB, respectively. This was followed by various membrane synthesis and modification strategies to prepare membranes with reduced active species crossover and improved battery performances. The results in this work not only contribute to the basic understanding of the relationship between membrane properties and RFBs performances but also greatly contribute to the future market of the RFBs with low cost and high performance.
Keywords: Anion exchange membranes, Aqueous organic redox flow battery, Zinc slurry-air flow battery, Structure-property relation, Battery test
Directeurs de Thèse : Fannie Alloin et Cristina Iojoiu
Redox flow batteries, in particular, aqueous organic redox flow batteries (AORFBs) and Zinc (Zn) slurry-air flow batteries are considered to be very attractive candidates for large-scale electricity storage due to their safety and environmental friendliness, economic feasibility and high storage capacity. In these batteries, the membrane allows the transport of ions between the catholyte and the anolyte while providing a physical barrier between the two compartments in order to prevent electrical short circuits. The performance, lifespan and cost of these batteries are greatly affected by the physicochemical properties and type of the employed membrane. However, a critical discussion of the state-of-the-art studies on membranes showed that the research and development of appropriate membranes for these batteries has received insufficient attention.
In this PhD thesis, aiming at first understanding the correlations between the membranes properties and cell performances, commercial porous and prepared anion exchange membranes were ex-situ characterized and tested in the Zn slurry-air flow battery and AORFB, respectively. This was followed by various membrane synthesis and modification strategies to prepare membranes with reduced active species crossover and improved battery performances. The results in this work not only contribute to the basic understanding of the relationship between membrane properties and RFBs performances but also greatly contribute to the future market of the RFBs with low cost and high performance.
Keywords: Anion exchange membranes, Aqueous organic redox flow battery, Zinc slurry-air flow battery, Structure-property relation, Battery test
Directeurs de Thèse : Fannie Alloin et Cristina Iojoiu
Composition du jury :
Monsieur Lionel Flandin
Professeur, USMB, Examinateur
Monsieur Emmanuel Baudrin
Professeur, UFR de Pharmacie -UPJV, Rapporteur
Madame Odile Fichet
Professeur, Université Cergy Pontoise, Rapporteur
Monsieur Mathieu Etienne
Directeur de Recherche CNRS, LCPME, Examinateur
Monsieur Steven Le Vot
Maitre de Conférences, Université Montpellier, Examinateur
Infos date
Soutenance le 12 Avril 2021 à 10h00 Adresse de la soutenance : Amphi de la Maison Jean Kuntzmann
110 rue de la Chimie. Domaine Universitaire