采用溶胶-凝胶技术,以Ti(OC4H9)4和Ce(NO3)3·6H2O为前驱体制备了Ti/Ce不同摩尔配比的TiO2-CeO2复合薄膜.运用X射线衍射(XRD)、扫描电镜(SEM)、紫外-可见光吸收光谱、循环伏安法和电化学交流阻抗等分析了其结构和性能.实验结果表明,当Ti/Ce摩尔比为1:1时,薄膜具有致密的非晶态显微结构;在Li+离子注入/脱出过程中,薄膜有较快的电化学响应和较高的电荷容量,在20 mV·s-1的扫描速率下,注入Li+离子的扩散系数约为1.50×10-11 cm2·s-1,并且第20次稳定循环的阴极和阳极电荷密度分别为12和9.5 mC·cm-2,表明薄膜具有良好的循环可逆性.电化学和光学测试表明该薄膜可以作为电致变色装置的对电极.
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