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Table of contents
Introduction
Chapter 1: Literature survey
1. Solid oxide fuel cell (SOFC)
1.1. Electrolyte
1.2. Anode
1.3. Cathode
2. Lnn+1NinO3n+1 -type materials: state of the art
2.1. K2NiF4-type materials (Ln2NiO4+δ, Ln = La, Pr and Nd)
2.1.1. Oxygen diffusion and ionic conductivity
2.1.2. Electronic conductivity
2.1.3. Current development on Ln2NiO4+δ (Ln = La, Pr and Nd) for SOFC application
2.1.4. Chemical compatibility and stability
2.2. Higher order RP phases Lan+1NinO3n+1(n =2 and 3)
2.2.1. Current development on higher order RP phases for SOFC application
References
Chapter 2: An innovative architectural design to enhance the electrochemical performance of La2NiO4+δ cathodes for solid oxide fuel cell applications
1. Introduction
2. Experimental Section
2.1. Films preparation
2.2. Characterization
3. Results and discussion
3.1. Microstructural control of La2NiO4+ coating by ESD
3.1.1. Influence of the deposition time
3.1.2. Influence of the nozzle-to-substrate distance
3.1.3. Influence of the substrate temperature
3.1.4. Influence of the flow rate
3.1.5. Influence of the nature of the solvent
3.1.6. Architectural design of the LNO cathode
3.2. Electrochemical properties of the selected LNO cathodes
3.3. Stability and reactivity
4. Conclusions
References
Supporting information
Chapter 3: Efficient 3-D coral La2-xPrxNiO4+δ SOFC cathodes: a compromise in electrochemical performance and chemical stability
1. Introduction
2. Experimental
2.1. Film preparation and powder synthesis
2.2. Symmetric and single cell preparation
2.3. Physico-chemical characterization
2.4. Electrochemical measurements
2.4.1. Symmetrical cells characterization
2.4.2. Single cells characterization
3. Results and discussion
3.1. Structural properties of La2-xPrxNiO4+δ (0 ≤ x ≤ 2) films
3.2. Microstructural properties of the La2-xPrxNiO4+δ (0 ≤ x ≤ 2) films
3.3. Compositional properties of La2-xPrxNiO4+δ (0 ≤ x ≤ 2) films
3.4. Effect of praseodymium content on the stability and compatibility of La2-xPrxNiO4+δ with CGO
3.5. Electrochemical properties
3.5.1. Symmetrical cells performance
3.5.2. LaPrNiO4+δ single cell performance
4. Conclusions
References
Supporting information
Chapter 4: La4Ni3O10-δ as an efficient solid oxide fuel cell cathode: electrochemical properties versus microstructure
1. Introduction
2. Experimental
3. Results and discussion
3.1. Structural characterization and elemental analysis
3.2. Microstructural characterization
3.2.1. Influence of the deposition time
3.2.2. Influence of the precursor solution concentration
3.2.3. Influence of the solvent composition
3.2.4. Influence of the substrate temperature
3.2.5. Effect of the nozzle to substrate distance
3.2.6. Selected La4Ni3O10-δ films microstructures for electrochemistry
3.3. Electrochemical properties
4. Conclusions
References
Chapter 5: Influence of CGO addition on electrochemical properties of nickelates based cathodes
Part I: Design of interfaces in efficient Ln2NiO4+δ (Ln = La, Pr) cathode for SOFCs application
1. Introduction
2. Experimental
2.1. Materials and solution preparation
2.2. Cathode preparation and characterization
3. Results and discussion
3.1. Structural characterization of the LnNO films
3.2. Microstructural characterization of the LnNO films with different architectures
3.3. Electrochemical properties and stability
4. Conclusions
References
Supporting information
Part II: Lan+1NinO3n+1 (n = 2 and 3) phases and composites for solid oxide fuel cell cathodes: facile synthesis and electrochemical properties
1. Introduction
2. Experimental
2.1. Synthesis process and characterization
3. Results and discussion
3.1. Structural characterization
3.2. Oxygen content analysis by TGA
3.3. Thermal expansion
3.4. Microstructural characterization
3.5. Electrode performances
3.6. Chemical stability and compatibility with CGO
4. Conclusions
References
Supporting information
Conclusions and perspectives
Annexes
