借助于I-V极化曲线、交流阻抗测试及电子扫描电镜等技术和设备,对以Y2O3稳定ZrO2多晶固体氧离子导体(YSZ)为基体的Pt/YSZ电极结构电学性能和电极形貌随时间的老化变化特性进行了研究;为定量表述电极形貌的变化特性,作者提出了一种有关Pt/YSZ电极结构电极界面的形貌模型,采用此模型对不同老化时间下的电极Pt/空气/YSz三相界面的长度进行了定量计算.实验测试、理论模型计算等结果都表明:Pt/YSZ电极结构的电学性能和电极形貌均随老化时间出现了明显的变化.
By means of SEM observation and complex AC impedance, as well as I-V polarization curve,
the electrics characteristic and electrode appearance of Pt/YSZ(yttria stabilized zirconia) electrode structure at different aging
time were studied. In addition, a new model of the electrode and electrolyte interface (Pt/YSZ) was proposed, the length of triple
phase boundary of the electrode at different aging time was calculated by using this model. Both the experimental result and the result calculated by using
the theoretic model show that the electrics characteristic and electrode appearance of Pt/YSZ will obviously change with aging time.
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