(1. 福州大学 材料科学与工程学院，福州 350116;
2. 厦门理工学院 材料科学与工程学院，厦门 361024)
摘 要: 采用热分解法制备Ti/Ru0.4Mn(0.6-x)SnxO2(x=0, 0.3, 0.6)三元氧化物电极材料。通过扫描电子显微镜(SEM)、X射线衍射( XRD)、循环伏安(CV)、交流阻抗谱(EIS)和恒流充放电分析Ti/Ru0.4Sn(0.6-x)MnxO2电极材料的组织结构和电容性能。结果表明:三元氧化物电极中SnO2的加入能抑制RuO2表面析出，且有利于形成Ru-Mn-Sn-O固溶体氧化物;而MnO2的加入可以降低氧化钌的结晶度。三组元相互配合降低离子扩散阻力，提高活性材料的利用率，从而提高Ti/Ru0.4Mn(0.6-x)SnxO2电极材料的电荷存储能力。Ti/Ru0.4Mn0.3Sn0.3O2三元电极的比电容可达 682 F/g，约为Ti/RuO2-SnO2和Ti/RuO2-MnO2二元氧化物电极的2~3倍。
关键字: 二氧化锰;二氧化锡;比电容;交流阻抗
（1. College of Materials Science and Engineering, Fuzhou University, Fuzhou 350116, China;
2. College of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China）
Abstract:Ti/Ru0.4Sn(0.6-x)MnxO2 electrodes (x=0, 0.3, 0.6) were prepared by thermal decomposition method. The microstructure, morphology and capacitive properties of the as-prepared electrodes were investigated by XRD, SEM, CV, EIS and constant current charge-discharge. The results show that adding SnO2 into the ternary electrodes materials can inhibit the precipitation of RuO2 on surface and is beneficial to form the Ru-Mn-Sn-O solid solution oxide, and MnO2 can suppress the crystallinity of RuO2. So, the interaction of the three components lead to the decrease of the ion diffusion resistance and the improvement of the charge storage ability of Ti/Ru0.4Mn(0.6-x)SnxO2 electrodes. The maximum specific capacitance of 682 F/g is obtained for Ti/Ru0.4Mn0.3Sn0.3O2 electrode, which is about two or three times of that of Ti/RuO2-SnO2 or Ti/RuO2-MnO2 electrodes.
Key words: MnO2; SnO2; specific capacitance; electrochemical impedance
