化学镀制备高温质子导体镍电极及其电化学性能

发布时间：2018-04-28 17:21

  本文选题：化学镀 + 镍电极　； 参考：《无机材料学报》2017年12期

【摘要】：采用化学镀在高温质子导体Ca Zr_(0.9)In_(0.1)O_(3-δ)(CZI)的电解质陶瓷表面沉积金属镍电极,通过SEM显微结构分析比较了酸刻蚀和还原工艺对电极形貌以及电极 电解质界面的影响。结果表明,使用HNO_3-HCl混合刻蚀液,并以水合肼为还原剂的二次化学镀可获得颗粒均匀细小且界面结合良好的镍电极。通过电化学阻抗谱并结合浓差电池等方法研究比较了以化学镀镍电极和涂覆焙烧铂电极为电极,CZI为电解质的对称电池的电导率和质子迁移率。工作温度为800℃时,镍电极高温质子导体的总电导率为4.131×10~( 4) S/cm,并且工作温度在400℃以上时,镍电极对称电池的质子迁移率均接近100%。这些结果表明,二次化学镀制备的镍电极具有与铂电极相近的电化学性能,而成本则更低,可以取代Pt电极用于高温质子导体的电化学器件中。
[Abstract]:Metal nickel electrodes deposited on the surface of electrolytic ceramics were deposited by electroless plating on the surface of high temperature proton conductor CaZrS (0.9InP). The effect of acid etching and reduction process on the morphology of the electrode and the interface between electrode and electrolyte were analyzed and compared by means of SEM microstructure. The results show that the nickel electrode with fine particles and good interface can be obtained by secondary electroless plating with HNO_3-HCl mixed etching solution and hydrazine hydrate as reducing agent. The conductivity and proton mobility of a symmetrical cell with electroless nickel plating electrode and roasted platinum electrode as electrolyte were studied by electrochemical impedance spectroscopy (EIS) and concentration difference cell. When the operating temperature is 800 鈩，

本文编号：1816187