Sc_2O_3稳定ZrO_2电解质材料及其研究进展
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摘要
固体氧化物燃料电池(SOFC)是高效洁净利用碳基燃料的有效途径,具有高效率、环境友好、全固态结构等特点,并且适用于多种燃料气体,因此成为能源和材料领域的热点之一。SOFC的国际发展趋势是中温化,具有投资小、材料成本较低、电极不易老化、界面反应可有效控制等优点。电解质是整个SOFC的核心部件,增强电解质的电导率,开发高性能的电解质材料是SOFC实现大规模发展的关键。目前SOFC所使用的电解质主要为锆基固体电解质,其中Sc_2O_3稳定ZrO_2(ScSZ)是锆基固体电解质中离子电导率最高的电解质材料,是中温SOFC(ITSOFC)首选电解质。首先介绍了固体氧化物燃料电池的结构、工作原理、对电解质的材料要求及其技术发展趋势,然后阐述了ScSZ电解质材料的晶体结构、离子导电机制。重点总结了ScSZ电解质材料研究现状、发展趋势及发展前景。
Solid oxide fuel cell( SOFC) is the effective way to clean and efficient use of carbon-based fuels. It becomes one of hotspots in the field of energy and materials for its high efficiency,environment friendliness,all solidstate structure and adaptability on variety of fuel gas. In the international development trend of SOFC,the suitable temperature for SOFC is becoming lower,which has the advantages of little investment,low material cost,the electrode is not easy to aging,and interface reaction can be effectively controlled. The electrolyte is the core components of entire solid oxide fuel cell. Developing high-performance SOFC electrolyte material is the key to achieve large-scale development. The main electrolyte of SOFC is zirconium base solid electrolyte,in which scandia stabilized zirconia( ScSZ) is the highest ionic conductivity and the preferred in intermediate temperature SOFC( ITSOFC) electrolyte. This article described the structure,working principle and electrolyte material requirements of the solid oxide fuel cell,and expounded the crystal structure,ionic conductivity principle of ScSZ electrolyte material. The research status,trends and prospects of Sc SZ electrolyte materials were emphatically summarized.
Solid oxide fuel cell( SOFC) is the effective way to clean and efficient use of carbon-based fuels. It becomes one of hotspots in the field of energy and materials for its high efficiency,environment friendliness,all solidstate structure and adaptability on variety of fuel gas. In the international development trend of SOFC,the suitable temperature for SOFC is becoming lower,which has the advantages of little investment,low material cost,the electrode is not easy to aging,and interface reaction can be effectively controlled. The electrolyte is the core components of entire solid oxide fuel cell. Developing high-performance SOFC electrolyte material is the key to achieve large-scale development. The main electrolyte of SOFC is zirconium base solid electrolyte,in which scandia stabilized zirconia( ScSZ) is the highest ionic conductivity and the preferred in intermediate temperature SOFC( ITSOFC) electrolyte. This article described the structure,working principle and electrolyte material requirements of the solid oxide fuel cell,and expounded the crystal structure,ionic conductivity principle of ScSZ electrolyte material. The research status,trends and prospects of Sc SZ electrolyte materials were emphatically summarized.
引文
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