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为了得到高比电容的电极材料,采用热分解法制备了不同温度下Ti/Ir0.4Sn0.6O2电极材料。运用X射线衍射(XRD)、差热分析、扫描电镜(SEM)和循环伏安法(CV)分别测试了该材料的晶体结构、表面形貌和电化学特性。结果表明:涂层的晶化温度高于360℃。320℃退火的电极表面有很多白色小颗粒析出,其活性氧化物较多。比电容受热处理影响较大,在280℃时电容值很小,可逆性低,320℃退火的电极比电容为454 F/g。该电极随着充放电循环次数的增加,比电容增加,经过9000次循环后,比电容才开始下降,经历10000次循环充放电后的比电容为493 F/g,比未经循环时还大10%。
In order to obtain high specific capacitance of the electrode material, the Ti / Ir0.4Sn0.6O2 electrode material was prepared by thermal decomposition method. The crystal structure, surface morphology and electrochemical properties of the material were tested by X-ray diffraction (XRD), differential thermal analysis, scanning electron microscopy (SEM) and cyclic voltammetry (CV) The results show that the crystallization temperature of the coating is higher than 360 ℃. There are many small white particles precipitated on the surface of the electrode annealed at 320 ℃, and there are more reactive oxides. The specific capacitance is greatly affected by the heat treatment, the capacitance value is very small at 280 ° C, the reversibility is low, and the specific capacitance of the electrode annealed at 320 ° C is 454 F / g. With the increase of the number of charge-discharge cycles, the specific capacitance of the electrode increased. After 9,000 cycles, the specific capacitance started to decrease. After the charge-discharge cycle of 10,000 cycles, the specific capacitance was 493 F / g, which was larger than that without cycling 10%.