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Full-Text Articles in Engineering
Electrode Development And Electrocatalysts Design For Polymer Electrolyte Membrane Fuel Cells, Xiong Peng
Electrode Development And Electrocatalysts Design For Polymer Electrolyte Membrane Fuel Cells, Xiong Peng
Theses and Dissertations
Because of environmental issues and national conflicts caused by overuse of fossil fuels, there is a need to seek renewable ways to utilize energy. In the transportation sector, hydrogen-based polymer electrolyte membrane fuel cells, including proton exchange membrane fuel cells (PEMFCs) and anion exchange membrane fuel cells (AEMFCs), have been considered as a promising alternative to conventional combustion engines. However, the widespread commercialization of both PEMFCs and AEMFCs has been hindered by several factors, including cost and performance. In this thesis, a series of topics including electrode fabrication, electrocatalyst development for both PEMFCs and AEMFCs, as well as the water …
Fundamentals Of Srcoo3 Based Oxygen-Deficient Perovskites As Cathodes For Solid Oxide Fuel Cells, Tianrang Yang
Fundamentals Of Srcoo3 Based Oxygen-Deficient Perovskites As Cathodes For Solid Oxide Fuel Cells, Tianrang Yang
Theses and Dissertations
The local structure and oxygen stoichiometry in oxide systems have a profound impact on oxygen electrocatalysis encountered in metal-air batteries and solid oxide fuel cells (SOFCs). However, this knowledge is often obtained under conditions different from the real working conditions of the material, resulting in misinterpretation and misunderstanding. This PhD dissertation aims to obtain the structure and oxygen stoichiometry information of a class of perovskite oxides under their real working conditions in solid oxide fuel cells. Several perovskite oxides were selected for the study: Sr0.9Y0.1CoO3- (SYC10), Sr0.9Y0.3CoO3- (SYC30), SrCo0.9Nb0.1O3- (SCN10) and SrCo0.9Ta0.1O3- (SCT10). The local crystal structure and oxygen stoichiometry …
Structural, Interfacial, And Electrochemical Properties Of Pr2nio4+Δ – Based Electrodes For Solid Oxide Fuel Cells, Emir Dogdibegovic
Structural, Interfacial, And Electrochemical Properties Of Pr2nio4+Δ – Based Electrodes For Solid Oxide Fuel Cells, Emir Dogdibegovic
Theses and Dissertations
Currently, the electrochemical performance and performance durability of solid oxide fuel cells (SOFCs) are limited by cathode materials. The high polarization resistance and phase instability of the cathode are two major challenges to hinder the commercialization of SOFC systems. Two families of oxides are presently known as potential cathode materials for SOFCs: (1) the perovskite family of oxides with a general formula of ABO3, and (2) the Ruddlesden-Popper (RP) family of oxides (e.g. nickelates) with a general formula of A2BO4. The electron-hole conduction in these materials occurs simultaneously with oxygen ion conduction based on …
Solid Oxide Fuel Cells With Both High Voltage And Power Output By Utilizing Beneficial Interfacial Reaction, Chao Su, Zongping Shao, Ye Lin, Yuzhou Wu, Huanting Wang
Solid Oxide Fuel Cells With Both High Voltage And Power Output By Utilizing Beneficial Interfacial Reaction, Chao Su, Zongping Shao, Ye Lin, Yuzhou Wu, Huanting Wang
Faculty Publications
An intriguing cell concept by applying proton-conducting oxide as the ionic conducting phase in the anode and taking advantage of beneficial interfacial reaction between anode and electrolyte is proposed to successfully achieve both high open circuit voltage (OCV) and power output for SOFCs with thin-film samarium doped ceria (SDC) electrolyte at temperatures higher than 600 °C. The fuel cells were fabricated by conventional route without introducing an additional processing step. A very thin and dense interfacial layer (2–3 μm) with compositional gradient was created by in situ reaction between anode and electrolyte although the anode substrate had high surface roughness …