真空烧结下TinO2n-1多孔电极的制备及性能

Preparation and Properties of TinO2n-1 Porous Electrode Under Vacuum Sintering

为给工业制备TinO2n-1多孔电极提供技术支持,以TiH2与TiO2为合成原料,采用高温烧结-压片法制备了TinO2n-1电极。通过扫描电镜(SEM)、X射线衍射仪(XRD)进行材料表征,探究了制备TinO2n-1电极的工艺合理性,利用电化学工作站考察了自制TinO2n-1电极的性能。结果表明:TiH2与TiO2的摩尔比为1∶5,真空下烧结温度为950℃时,可得到主相为Ti4O7的TinO2n-1电极。将自制的亚氧化钛电极与石墨电极分别进行阳极极化测试,亚氧化钛电极析氧电位维持在2.25 V,远高于石墨电极的1.60 V,在循环伏安测试中,TinO2n-1电极表现出很高的电化学稳定性。

In this paper, TinO2n-1 electrode was prepared by high temperature sintering - pressing method with TiH2 and TiO2 as raw materials. Materials were characterized by SEM and XRD technology, and the preparation process of TinO2n-1 electrode was explored. The electrochemical performance of TinO2n-1 electrode was investigated by electrochemical workstation. Results showed that TinO2n-1 electrode with Ti4O7 as main phase was obtained when the molar ratio of TiH2 to TiO2 was 1 : 5 and the sintering temperature was 950℃ in vacuum. The anodic polarizations of the self- made titania electrode and the graphite electrode were measured. The oxygen evolution potential of the titania electrode was maintained at 2.25 V, which was much higher than that of the graphite electrode at 1.60 V and the TinO2n-1 electrode exhibited high electrochemical stability in cyclic voltammetry.