热电型固体氧化物燃料电池阴极材料的开发

来源 :中国化学会第十七次全国电化学大会 | 被引量 : 0次 | 上传用户:zgxkz
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固体氧化物燃料电池(SOFCs)是一种重要的基础电化学反应器[1,2],其核心由“三明治”结构的 “阴极|固体电解质|阳极”三部分组成,如图1所示,其工作原理如下(以氧离子导体电解质为例),氧气 (通常来自空气)通过外电路获得阳极释放的电子并在阴极上还原为氧离子(2e-+1/2O2→O2-),由此产生 的氧离子通过电解质中氧空位迁移到阳极,与被阳极催化氧化的碳氢燃料气结合为H2O及CO2等气体 产物一起排出,反应产生的非体积膨胀功用于外电路中的负载,此时,SOFCs具有将化学能转换为 电能的作用.
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