采用Pechini方法制备Pr2-xLaxNiO4+δ(x=0,1.5)和Pr2-xLaxNiO4+δ/Ce0.8Gd0.2O2-δ(CGO)两种阴极粉体,并通过×射线衍射光谱法(XRD)等手段对粉体进行表征,结果表明Pr2-xLaxNiO4+δ阴极前驱体在空气中1 150℃退火12h后能够完全成相.Pr2-xLaxNiO4+δ/CGO(或Pr2-xLaNiO4+δ)和La0.6Sr0.4CoO3-δ(LSC)集电层分别沉积在具有CGO阻挡层的半电池上形成单电池,扫描电子显微镜法(SEM)分析发现功能梯度阴极与CGO阻挡层结合良好.以Pr2-xLaxNiO4+δ/CGO(或者Pr2-xLaxNiO4+δ)为阴极的单电池性能测试表明,掺杂不同比例CGO以后,电池输出性能均随之而降低,而以Pr2NiO4+δ为阴极的电池性能达到相应温度下的最高输出性能.%The cathode powders of Pr2-xLaxNiO4+δ (x=0,1.5) and Pr2-xLaxNiO4+δ/Ce0.8Gd0.2O2-δ (CGO) were prepared by Pechini method.The cathode powders were characterized by XRD.XRD patterns indicate that a single phase of Pr2-xLaxNiO4+δ powders can be formed by annealing of the precursors at 1 150 ℃ for 12 h in the air.The single cells were fabricated by deposition of Pr2-xLaxNiO4+δ(x =0,1.5)/CGO (or Pr2-xLaxNiO4+δ) and LSC layers on the CGO barrier layer of half cells.SEM analysis shows that the gradient cathodes have good adhesion to the CGO barrier layer.The performance testing results of Pr2-xLaxNiO4+δ/CGO (or Pr2-xLaxNiO4+δ)-based single cells indicate that the performance gets worse with the increase of CGO content.The Pr2NiO4+δ-based cells show the best performance at corresponding temperature.
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