摘要
采用热分解方法在钛基体上制备了(36%)RuO2-(64%)Ta2O5混合氧化物涂层。采用X射线衍射(XRD)、扫描电镜(SEM)、循环伏安(CV)以及恒流充放电测试研究了涂层电极的组织结构、表面形貌以及电容性能。结果表明:(36%)RuO2-(64%)Ta2O5涂层以非晶氧化物为基体,带有少量纳米微晶RuO2的组织结构。在酸性溶液中,在50～900 mV/s的扫描速度下,Ti/(36%)RuO2-(64%)Ta2O5涂层电极的伏安曲线都具有近似矩形形状,表现出良好的电容特性和功率特性。以5 mA/cm2和10 mA/cm2放电,比电容分别为525.5 F/g和495.1 F/g。在经历2000次循环充放电后,电极的电荷储存能力仍未衰减,显示其优异的循环稳定性。
A amorphous/crystal mixed structural 36% RuO2-64% Ta2O5coating was deposited on titanium substrate from ethanol ruthenium and tantalum chloride solution, using the thermal decomposition method at 300 ℃. Structure and electrochemical capacitive properties of the coating were investigated by means of X-ray diffraction （XRD） , scanning electron microscopy （SEM） , cyclic voltammetry （CV） and galvanostatic charge-discharge tests. The XRD results reveal the 36% RUO：-64% Ta2O5 coating presents amorphous structure with some nano-size crystallites in the amorphous matrix. The electrochemical analysis shows that the Ti/36% RuO：64% Ta2O5 electrode exhibits typical capacitive characteristics and good power characteristics in 0. 5 mol/L H2SO4 electrolyte. Its specific capacitance as single electrode is up to 525.5 and 495.1 F/g （ RuO2） at a discharge current of 5 and 10 mA/cm^2 , respectively. Excellent cycling behavior is observed for this coating, with no loss in specific capacitance during 2000 cycles.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2012年第7期122-126,共5页
Transactions of Materials and Heat Treatment
基金
国家"863"计划项目(2007AA03Z325)
福建省自然科学基金(2009J05116)
