In this work, the structure and electrochemical properties of titanate ceramics with in situ Ni exsolution are investigated to identify the structure-performance relationship of the exsolved perovskite for use as electrode materials in solid oxide cells. The phase formation, redox behaviour and exsolution properties of the material have been studied. The characteristics of the individual electrochemical processes are identified and correlated with the Ni doping and microstructural evolution. The results indicate that the electrode activity is strongly dependent on the density and particle size of the in situ grown Ni nanoparticles. The interfacial ion transfer and charge transfer processes can be promoted by increasing the electrode surface area or improving the adhesion between the electrode and electrolyte, while the surface electrode processes including the dissociative adsorption are more dependent on the porosity and electrode/electrolyte interfacial region of the exsolved titanate electrode.

在这项工作中，研究了具有原位Ni析出的钛酸盐陶瓷的结构和电化学性能，以确定了用作固体氧化物电池电极材料的溶解钙钛矿的结构-性能关系。已经研究了材料的相形成，氧化还原行为和析出性能。确定了各个电化学过程的特征，并将其与Ni掺杂和微结构演变相关联。结果表明，电极活性强烈地取决于原位生长的Ni纳米颗粒的密度和粒径。可以通过增加电极表面积或改善电极与电解质之间的附着力来促进界面离子转移和电荷转移过程，