Doped-Ceria Electrolytes (eBook)

Luca Spiridigliozzi received his Ph.D. Degree (Materials Engineering) in 2018 from University of Cassino and Southern Lazio in Italy. He is the co-founder, CTO and private researcher at ReCO2, an Italian startup developing innovative materials. Most of his publications are on ceria-based materials.

Contents 6
List of Figures 7
1 Introduction 10
2 Fuel Cells 12
2.1 Polymer Electrolyte Fuel Cells (PEFCs) 14
2.2 Alkaline Fuel Cells (AFCs) 16
2.3 Phosphoric Acid Fuel Cells (PAFCs) 17
2.4 Molten Carbonate Fuel Cells (MCFCs) 18
2.5 Solid Oxide Fuel Cells (SOFCs) 19
2.5.1 Solid Oxide Electrolysis Cells (SOECs) 21
References 22
3 SOFC Components 23
3.1 Anode Materials 24
3.2 Cathode Materials 25
3.3 Electrolyte Materials 26
3.3.1 Zirconia-Based Materials 26
3.3.2 Perovskite-Structured Materials 27
3.3.3 Brownmillerite-Structured Materials 28
3.3.4 LAMOX Materials 28
3.3.5 Ceria-Based Materials 29
References 31
4 Doped Ceria Electrolytes: Synthesis Methods 33
4.1 Solid-State Synthesis 33
4.2 Wet Chemical Synthesis 34
4.3 Precipitation/Co-precipitation 35
4.3.1 Urea-Based Homogeneous Precipitation (UBHP) 36
4.3.2 Influence of the Precipitating Agents 39
4.3.3 Carbonate Environment Precipitation 43
4.4 Hydrothermal Synthesis 49
4.4.1 Carbonate Environment Hydrothermal Synthesis 51
4.5 Sol-gel Synthesis 58
4.6 Microwave-Assisted Synthesis 59
References 61
5 Doped Ceria Electrolytes: Alternative Sintering Methods 64
5.1 Flash Sintering (FS) 64
5.1.1 A Comparison Between Conventional and Field-Assisted Sintering of Gadolinium-Doped Ceria 65
5.2 Fast Firing (FF) 71
5.2.1 Rapid Densification of Gd-/Sm-Doped Ceria 73
References 77
Appendix A Theoretical Background 79
A.1 Ionic Conduction in Solids 79
A.2 Sintering 81
Bibliography 84