| dc.description.abstract | In a few years ago showed that consumption of energy resources have become so practical in life but synonymous with the consumption of energy resources vary so will lead to environmental pollution, scientists on the way to the research efforts on the use of energy resources the fuel cell shows the potential of SOFC is capable of meeting the energy needs of modern life. SOFC fuel cells are highly efficient and environmentally friendly and the fuel source to operate this battery is very rich and diverse fuel sources. However, the application of SOFC has a disadvantage that must be operated. At high temperatures, the type of material in the fuel cell has a high production cost. In order to improve the performance of fuel cells, in this study, the compound doping method was used, while combining electrolyte and cathode to create a mixed proton, oxygen ion, and electron conducting cathode for SOFCs
The conductive ion-electronic (MIEC) mixture of perovskite La0.5Sr0.5Co0.2Fe0.8O_(3-δ) (LSCF5528) is one of the extremely promising mixtures for cathode at the intermediate temperature solid oxide fuel cells (IT-SOFCs). The three-dimensional structure is so complex that it is important to understand the structure and characteristics of such a material because of the performance and durability of the spongy cathodes so in this paper, a series of concentrations are also examined pH level as well as suitable fuel source to synthesize cathode powder so that it is reasonable and most stable.
To enhance the cathode material this research article uses Nickel doped at B-site to increase the cathode material by doped a low-valence.In addition to doping at a low Nickel valence La0.5Sr0.5Co0.2NixFe0.8-x with x from 0.01 to 0.03 (LSCF55N) in Fe-sited will decrease the activation energy, which proves that the reaction ability of the material requires low energy to handle in reaction, also using Nickel to replace a quantity Fe-sited in the material could be increase the oxygen vacancies in the material increasing TPB (Triple Phase Boundary) more than the exchange reaction that takes place faster to produce more electron more power density.
The cathode material in this study is based on two types: mixed oxide ionic electron conductor and a composited of proton conductor and mixed oxide conductor. In addition, the study also provides a comparison between the O-type and P-type of SOFC about energy generated between the two types above. The use of multiple types of capacitance between the P-type and O-type with the same type of cathode will lead the implementation of many steps compared in order to understand the material the deeper SOFC. In addition, the purpose of the study is also related to understanding the structure of perovskite to create purity for materials through the adjustment of pH and source of combustion materials is glycine nitrate, also control the calcination temperature varying from 800°C-> 1200°C to form a purity materials.
The morphology and structure of the material used XRD, SEM devices to diagnose and using TGA to measure holes space is created at high temperatures showed a weight loss in the powder surveyed cathode materials, cathode materials also simultaneously measured and conductivity coefficient of heat expansion. Later in the study, there are also testing on power density and electrochemical impedance spectroscopy. | en_US |