BaCo0.4Fe0.4Zr0.1Y0.1O3-阴极材料的合成与电学性能
毕业论文键词：阴极 固体氧化物燃料电池 质子导体
Abstract A serious threat to the survival of mankind by environmental pollution and energy crisis, we developed a new environmentally friendly energy economy is a human need to complete the mission. The solid oxide fuel cell more environmentally friendly performance is superior, so favored in this field, each country is trying to develop this type of battery. However, the conventional solid oxide fuel cell operating temperature is too high, it requires a battery of high-temperature materials must be other configurations also high quality, which would increase the cost of the battery, whether it can develop in low temperature the solid oxide fuel cell determines the prospects for the development of fuel cells. Later research found that proton conductor solid oxide fuel cell is relatively low activation energy, energy efficiency is also high, so this type of battery has become the research scientists. After a large number of R & D trial found that low temperature, cerium doped barium has high proton conductivity, so the protonic ceramic fuel cells become the first choice of people. However, cerium-doped barium proton conductor is relatively low chemical stability, but also in carbon dioxide, water, chemicals in the environment relatively active. The current world order to improve the stability of the proton conductor of the fuel cell, instead of taking the Zr Ce approach. However, this method only a limited increase the proton conductor chemical stability, and can not operate stably at high carbon dioxide concentrations in the environment. If the incorporation of a large amount of zirconium to a large extent improve the chemical stability of the battery, the battery can cause material crystal grain size becomes small, and the resistance of the grain boundary will become larger, it will reduce battery ion conductance rate, thereby sintering activity of the battery will be worse. According disadvantage cerium-doped barium proton conductor solid oxide fuel cell, this paper attempts to developed a new cathode material to make up for these shortcomings.
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