| Titre : | Characterization and Modeling of Electrode for Proton Exchange Membrane Fuel Cell System (PEMFCS) |
| Auteurs : | Rachid Chebbi, Auteur ; Abdellah Beicha, Auteur |
| Type de document : | Monographie imprimée |
| Année de publication : | 2016 |
| ISBN/ISSN/EAN : | 01120007350000965 |
| Note générale : | Electrode Fabrication, Characterization (SEM,XRD,XPS,TEM),Degradation, Modeling. |
| Langues: | Français |
| Résumé : |
Cette thèse se compose de quatre étapes de la piles à combustible , la première partie est la préparation d'électrodes pour la pile à combustible à membrane échangeuse de protons, cette partie consacrée a la formulation et fabrication de l’électrode en utilisant le procédé de pulvérisation (Spray) suivi par caractérisations. La deuxième partie est l’opération de l'électrode avec différents paramètres tels que : la pression, débits, la températures de humidificateurs. Troisième partie est la dégradation de l'électrode après l’opération. Finalement la modélisation de la pile à combustible à membrane échangeuse de protons. Ce travail a été réalisée au niveau du l’laboratoire MEA de l’institue des piles à combustible UKM Malaisie.
ABSTRACT : This thesis consist of four parts of the fuel cells researches, The first part is electrode preparation for proton exchange membrane fuel cells (PEMFCs), which consist of electrode formulation and fabrication using spray method , followed by characterizations. Second part is testing the electrode with different parameters such as pressure, temperatures, follow rates, humidifiers temperatures effects. Third part is the electrode degradation after operating and the last is modeling for proton exchange membrane fuel cell. This work mainly located in Fuel Cell Institute UKM malysia, which was performed In MEA lab. |
| Sommaire : |
CONTENTS
General Introduction 1 CHAPTER I FUEL CELLS GENERALITY AND APPLICATIONS Introduction 3 I.1 What is fuel cell? 4 I.2 Main Categories of fuel cells. 5 2.a Phosphoric acid fuel cell (PAFC). 5 2.b Polymer electrolyte membrane fuel cell (PEMFC) 6 2.c Alkaline Fuel Cell (AFC). 8 2.d Molten Carbonate Fuel Cell (MCFC). 9 2.e Solid Oxide Fuel Cell (SOFC). 10 I.3 Proton exchange membrane fuel cells (PEMFCs). 12 I.4 Principe of proton exchange membrane fuel cells (PEMFCs). 13 I.5 Fuel source for proton exchange membrane fuel cells (PEMFCs). 14 I.6 Aspect thermodynamic for proton exchange membrane fuel cells 15 (PEMFCs). I.6.1 Variation of pressure and temperature for reversible voltage of 17 fuel cell under non-standard state conditions. I.6.1.a Reversible voltage variation with temperature. 17 I.6.1.b Reversible voltage variation with Pressure. 18 I.6.1.c Reversible voltage variation with concentration Nernst equation. 18 I.6.1 d Ideal reversible fuel cell efficiency. 19 I.6.1 e Real (Practical) reversible fuel cell efficiency. 19 I.7 Activation kinetics for fuel cell .Tafel Equation. 20 I.8 Cell Performance for proton exchange membrane fuel cells (PEMFCs). 21 I.9 Theory of Gas Diffusion Electrode. 23 I.9.1 Electrode Fabrication for proton exchange membrane 24 fuel cells (PEMFCs). Gas Diffusion layer GDL for electrode Pt/C Catalyst layer (CL) for electrode Pt/C. vi I.9.2 Parameters affecting performance electrode for proton exchange 26 membrane. I.9.3 Membrane for proton exchange membrane fuel cells (PEMFCs) 29 I.9.4 Membrane electrode Assembly (MEA) for (PEMFCs) 31 I.10 Electrode components for (PEMFCs) 32 I.10.1 Electrocatalyst (Pt/C) 32 I.10.2 Carbon support catalyst for PEMFCs 32 I.10.3 Binder PTFE and protonic conduct Nafion® ionomers solution 34 I.11 PEM Simulation and Modeling 35 CHAPTER II FABRICATION AND ANALYSIS BY SEM, XRD, TEM, AND XPS OF ELECTRODE Introduction 37 II.1.1 Electrode Preparation 37 II.1.2 Membrane treatments. 40 II.1.3. Membrane Electrodes Assembly (MEA). 41 II.1.4. Single cells components for proton exchange membrane 41 fuel cells (PEMFCs). II.1.5 Design of operating system for proton exchange membrane 42 fuel cell system (PEMFCs) II.2 Analysis Methods 43 II.2.1 Scanning Electron Microscopic (SEM) 43 II.2.2 X - Ray Diffraction (XRD) Analysis 44 II.2.2.a Apparatus 44 II.2.2.b Sample preparations 44 II.2.3 TEM Analysis 44 II.2.4 Surface Analysis X-Ray Photo-Electron Spectroscopy (XPS) 46 vii CHAPTER III DEGRADATION AND MODELING OF ELECTRODE FOR PROTON EXCHANGE MEMBRANE FUEL CELL SYSTEM (PEMFCs) Introduction 48 III.1. Scanning Electron Microscopy (SEM) 48 III.2. XPS Technique 50 2.1 Carbon (C1s) 53 2.2 Oxygen (O1s) 56 2.3 Fluorine (F1s) 57 2.4 Silicon (Si 2p) 59 2.5 Platinum (Pt 4f) 59 III.3 Electrode Degradation 60 III.3.1 Operating cathode in a single cell 25 cm2 60 III.3.2 SEM 20 wt% Pt/C 64 III.3.3 XPS Analysis for Cathode before test (EbT) and after test (ECaT) 65 III.3.4 XRD Analysis 73 III.3.5 Transmission electron microscopy (TEM) 74 III.4 PEM fuel cell modeling 76 III.4.1 Electrode preparation and single cell operation in fuel cell 76 test apparatus. III.4 2 Basic fuel cell operation 77 III.4.3 Model formulation 78 4.3.1 Electrochemical model 78 4.3.2 Cell reversible voltage 79 4.3.3 Activation voltage drop 79 4.3.4 Ohmic voltage drop 80 4.3.5 Concentration or mass transport voltage drop 81 viii 4. 4. 1. Determination of the activation loss parameters 82 4. 4 .2. Effect of the temperature on the performance of the 83 PEM fuel cell 4. 4. 3. Effect of the partial pressures 84 CONCLUSION 88 REFERENCES 91 Publications list 100 |
Disponibilité (1)
| Cote | Support | Localisation | Statut | Emplacement | |
|---|---|---|---|---|---|
| TH/0735 | Thèse de doctorat | BIB.FAC.ST. | Empruntable | Salle de mémoires et de théses |
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