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Solid Oxide Fuel Cells - Article Example

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In this article, the author states that solid oxide fuel cells are energy efficient, fuel-flexible and low population energy source. Their operation is based on the electrochemical conversion of the chemical energy of fuels e.g. Hydrogen, hydrocarbons, and others into electrical energy-electricity. …
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Solid Oxide Fuel Cells
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Download file to see previous pages Therefore all research focuses on component properties that will enhance the efficiency of SOFCs. Clean, Secure and sustainable energy sources, these terms often come up whenever energy production methods are considered. A fuel cell is an electrochemical device that directly converts the chemical energy of fuels (H, methanol, ethanol, hydrocarbons) into electrical energy-electricity. Fuel cells are efficient, less pollutant power generating technologies. Fuel cells are versatile ranging from alkaline cells and Proton Exchange Membrane Fuel Cell (PEMFC) that function at low temperatures<100oC to Molten Carbonate Fuel Cells (MCFCs) and SOFC that operate at high temperatures (500-1000oC). SOFCs are highly efficient, low pollution fuel cells with flexibility in fuel utilization. Conventional SOFCs operate at temperatures of about 800-1000oC. This is due to low oxygen ion conductivity and high activation energy of oxide electrolytes (Lifang et al., 2010). Single SOFC consists of an anode and a cathode that are separated by a solid oxide electrolyte which is an ionic inductor. The solid electrolyte is an oxygen ion, a proton or mixed oxygen ion-proton conductor that must be an effective electronic insulator and gas impermeable. YSL operate at temperatures of 750-10000c to be efficient due to the limited transport and catalytic properties of solid oxide fuel cells materials at low temperature. Doped ceria; GDC OR SDC are used as electrolyte and LSCF as a cathode for SOFCs at low temperatures less than 7000C. The high operating temperature of SOFCs has deterred the application of SOFC due to increased costs in the acquisition of material and process of production or fabrication of the components. It also contributes to a high-performance degradation rate, limited shutdown and startup cycles and a slow startup; electrode sintering, interfacial diffusion between electrode and electrolyte, mechanical stress due to differing TEC. ...Download file to see next pagesRead More
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