中文摘要：

采用热分解法在270℃制备钛基RuO_2-TiO_2氧化物涂层电极材料。利用循环伏安、电化学阻抗谱等方法研究Ti/RuO_2-TiO_2电极分别在0.5 mol/L H_2SO_4、0.5 mol/L Na_2SO_4和1.0 mol/L NaOH电解液中的超电容行为。结果表明：在酸性溶液和碱性溶液中Ti/RuO_2-TiO_2电极有较低的电荷转移电阻和优异的赝电容特性,比电容分别达到550 F/g和578 F/g;而在Na_2SO_4溶液中,该电极的电荷转移电阻较高,表现为典型的双电层电容特征,比电容仅为335 F/g;经历2000次循环充放电测试后,该电极在中性Na_2SO_4溶液中的稳定性最高,荷电能力仅下降3%;在酸性H_2SO_4溶液和碱性NaOH溶液中,该电极的荷电能力分别下降17%和29%。结合SEM和能谱分析可知：RuO_2-TiO_2在Na_2SO_4溶液中几乎不发生腐蚀,表现出良好的循环稳定性;RuO_2-TiO_2涂层在NaOH溶液中发生严重的面腐蚀,而在H_2SO_4溶液中则发生严重的点蚀,导致活性氧化物减少,荷电能力下降。

英文摘要：

RuO2-TiO2 coating were prepared by thermal decomposition method on pure titanium TA2 substrate at 270 ℃. The supercapacitor behavior of RuO2-TiO2 coating was investigated by cyclic voltammetry（CV）, electrochemical impedance spectroscopy （EIS） and charging-discharging test in 0.5 mol/L H2SO4, 0.5 mol/L Na2SO4 and 1.0 mol/L NaOH electrolytes, respectively. The results show that the Ti/RuO2-TiO2 electrode has low charge transfer resistance in acidic and alkaline electrolytes, and the specific capacitance of 550 F/g and 578 F/g are obtained in these two electrolytes, respectively. Conversely, the electrode has relative higher charge transfer resistance and lower specific capacitance （335 F/g） in neutral Na2SO4 electrolyte than that of in acidic and alkaline electrolytes. However, the electrode losing 17% and 29% of the maximum capacity after 2000 charging-discharging cycles in acidic and alkaline electrolytes, respectively, but just only 3% lost in neutral Na2SO4 solution. Combined with the SEM and EDS analysis, the electrode is hardly corroded in Na2SO4 solution, thus exhibits good cycle stability. In contrast, Ti/RuO2-TiO2 electrodes occur serious surface corrosion in NaOH solution, while occurring serious pitting corrosion in H2SO4 solution. Severe corrosion results in a significantly reduction of active substance, and thus reduces the charge capacity of the electrode.