Abstract
Performance of solid oxide fuel cells (SOFCs) is hindered by the sluggish catalytic kinetics on the surfaces of cathode materials. It has recently been reported that improved electrochemical activity of perovskite oxides can be obtained with the cations or the oxides of some metallic elements at the surface. Here, we used a cost-effective plasma glow charge method as a generic tool to deposit nano-size metallic particles onto the surface of SOFC materials. Ni nano-scale patterns were successfully coated on the La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) surface. The microstructure could be well controlled. The kinetics of oxygen exchange on the modified LSCF surface was promoted significantly, confirmed by electrical conductivity relaxation (ECR) measurement.
Highlights
Solid oxide fuel cells (SOFCs) have been studied as efficient solutions to the generation of electrical energy from traditional chemical energy stored in hydrogen or hydrocarbon fuels [1]
The atmosphere is not strongly reducing. This may be the reason that is chemically stable after the the atmosphere is not strongly reducing. This may be the reason that LSCF is chemically process, there may be some change in its non-stoichiometry of oxygen
The LSCF bar specimens with dimensions of 30 mm LSCF was prepared by a combustion method
Summary
Solid oxide fuel cells (SOFCs) have been studied as efficient solutions to the generation of electrical energy from traditional chemical energy stored in hydrogen or hydrocarbon fuels [1]. Energies 2016, 9, 786 coatings are very important to study the fundamental properties of surfaces, interfaces, and materials In this regard, chemical infiltration is ineffective, as compared to some other methods, e.g., chemical vapor deposition [16], pulsed laser deposition [17], and atomic layer deposition [18,19]. It was shown that the surface morphology is controllable by this method, and the kinetics of oxygen surface exchange is improved We believe that this method is applicable to coating other metallic nanoparticles onto many SOFC materials, such as anode materials and some cathode materials that are stable under the low-oxidizing or even reducing discharge atmosphere. It is feasible to make nanostructured SOFCs using a porous YSZ scaffold/YSZ electrolyte/porous LSCF triple-layer green cell through a single step plasma glow discharge process, while maintaining ( increasing) the catalytic activity of LSCF, which will constitute further study
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