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纳米TiO2修饰的La0.6Sr0.4Co0.2Fe0.8O3-δ(LSCF)阴极被直接应用于YSZ电解质电池上.TiO2可阻止LSCF和YSZ间的化学反应,抑制SrZrO3的形成.LSCF-0.25 wt%TiO2阴极电池在0.7 V和600℃下的电流密度是LSCF阴极电池的1.6倍.电化学阻抗谱结果表明,TiO2修饰显著加快了氧离子注入电解质的过程,这可能与TiO2抑制了阴极/电解质界面处高电阻SrZrO3层的形成有关.本文为在ZrO2基电解质上使用高性能的(La,Sr)(Co,Fe)O3阴极材料提供了一种简单有效的方法.
The nano-TiO2 modified La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) cathode was applied directly to the YSZ electrolyte cell.TiO2 can prevent the chemical reaction between LSCF and YSZ and inhibit the formation of SrZrO3.LSCF-0.25 wt% TiO2 The current density of cathodes was 1.6 times that of LSCF at 0.7 V and 600 ℃ .The results of electrochemical impedance spectroscopy showed that the modification of TiO2 significantly accelerated the process of oxygen ion implantation into the electrolyte, which may be due to the inhibition of the cathode / electrolyte interface with TiO2 High resistivity SrZrO3 layer.This paper provides a simple and effective method to use high performance (La, Sr) (Co, Fe) O3 cathode materials on ZrO2-based electrolytes.