王運(yùn)龍 趙凌 洪濤 夏長(zhǎng)榮

摘 要：在固體氧化物燃料電池中，陰極反應(yīng)極為復(fù)雜，包括離子、電子等載流子的傳導(dǎo)，氧分子的吸附、解離，電荷轉(zhuǎn)移等。復(fù)雜的情況下，同時(shí)包括氧離子、質(zhì)子的傳導(dǎo)。為此，提出了復(fù)雜體系的陰極反應(yīng)模型、闡明陰極反應(yīng)中質(zhì)子、離子的傳導(dǎo)步驟，揭示三相界面處的離子反應(yīng)過程。指出：（1）陰極界面極化電阻與電解質(zhì)離子電導(dǎo)率之間的函數(shù)關(guān)系；（2）指出復(fù)雜體系的陰極反應(yīng)過程中，存在氧還原和水生成的2類三相界面，即O-TPB與H-TPB。

關(guān)鍵詞：碳基燃料 反應(yīng)模型 復(fù)合陰極 氧離子導(dǎo)體 固體氧化物燃料電池

Abstract：The cathodes reaction in solid oxide fuel cell is very complicate. It includes the transport of ion and electron， oxygen molecular association and dissociation， and charger transfer. And in the complicate condition， it contains oxygen ion and proton transfer at the same time. So we propose a cathode reaction model for complicate system and point out the proton， oxygen ion transport step， then eventually find the ion reaction steps in three phase boundary （TPB）. We reveal that （1） the function between cathode interfacial polarization resistance and electrolyte ionic conductivity and （2） in the cathode reaction process of mutual system， there are two kinds of TPB as O-TPB and H-TPB.

Key Words：Reaction model；Composite cathodes；Oxygen-ion conductor；Solid oxide fuel cells

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