(1. 福州大學(xué) 材料科學(xué)與工程學(xué)院，福州 350116;
2. 廈門理工學(xué)院 材料科學(xué)與工程學(xué)院，廈門 361024)
摘 要: 采用熱分解法制備Ti/Ru0.4Mn(0.6-x)SnxO2(x=0, 0.3, 0.6)三元氧化物電極材料。通過(guò)掃描電子顯微鏡(SEM)、X射線衍射( XRD)、循環(huán)伏安(CV)、交流阻抗譜(EIS)和恒流充放電分析Ti/Ru0.4Sn(0.6-x)MnxO2電極材料的組織結(jié)構(gòu)和電容性能。結(jié)果表明:三元氧化物電極中SnO2的加入能抑制RuO2表面析出，且有利于形成Ru-Mn-Sn-O固溶體氧化物;而MnO2的加入可以降低氧化釕的結(jié)晶度。三組元相互配合降低離子擴(kuò)散阻力，提高活性材料的利用率，從而提高Ti/Ru0.4Mn(0.6-x)SnxO2電極材料的電荷存儲(chǔ)能力。Ti/Ru0.4Mn0.3Sn0.3O2三元電極的比電容可達(dá) 682 F/g，約為Ti/RuO2-SnO2和Ti/RuO2-MnO2二元氧化物電極的2~3倍。
關(guān)鍵字: 二氧化錳;二氧化錫;比電容;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
