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Enhancement in three-phase boundary of SOFC electrodes by an ion impregnation method: A modeling comparison

机译:离子浸渍法增强SOFC电极的三相边界:模型比较

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摘要

A theoretical model is proposed to estimate the length of three-phase boundary (TPB) of ion-impregnation-derived solid oxide fuel cell (SOFC) electrodes, which have experimentally shown considerable advantages in performance when compared with standard composite electrodes such as Ni-yttria-stabilized zirconia (YSZ) and (La,Sr)MnO3-YSZ. The electrode is modeled as a sphere-packed framework whose surface is coated with second-phase nanoscale particles. Compared with the composite electrodes, the impregnated electrodes show great enhancement in TPB length, theoretically indicating the feasibility of achieving highly electrochemically active electrodes by means of ion impregnation.
机译:提出了一种理论模型来估算离子注入固体氧化物燃料电池(SOFC)电极的三相边界(TPB)的长度,与标准复合电极(如Ni-氧化钇稳定的氧化锆(YSZ)和(La,Sr)MnO3-YSZ。电极被建模为球填充框架,其表面覆盖有第二相纳米级颗粒。与复合电极相比,浸渍电极的TPB长度大大增加,理论上表明了通过离子浸渍获得高电化学活性电极的可行性。

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