羧基氧化钌薄膜的热分解机理及其伏安性能

Thermal decomposition mechanism and electrochemical properties of carboxyl ruthenium oxide film

以RuCl3.3H2O异丙醇溶液为前驱体,采用原位分解法制备了超级电容器用羧基氧化钌薄膜。借助X射线光电子能谱仪、红外光谱仪、电化学分析仪和扫描电镜等手段,研究了薄膜的热分解机理及其电容性能和微观形貌。结果表明:随温度升高,RuCl3.3H2 O异丙醇溶液经历了先复合再分解的物相演变的过程之后才生成羧基氧化钌薄膜。羧基对薄膜的性能有重要影响,薄膜经300℃保温2 h处理后比电容达728 F.g-1,1000次充放电循环后保持在99.47%,附着力达24.56 MPa。

As a good film electrode material for supercapacitor,carboxyl ruthenium oxide was prepared using precursor of isopropyl alcohol solution of RuCl3.3H2 O by in-situ decomposition.The micro-morphology,thermal decomposition mechanism and capacitance of the film were studied by means of scanning electron microscopy,X-ray photoelectron spectroscopy,infrared spectrometer and electrochemical method,respectively.The results show that carboxyl ruthenium oxide film is produced through phase transition of synthesis and decomposition of the precursor of isopropyl alcohol solution of RuCl3.3H2 O with heating.Carboxyl has significant influence on performances of the film.Treated at 300 ℃ for 2 h,specific capacitance of the film is 728 F.g-1 and maintains at 99.47% after 1000 charge-discharge cycles.The adhesive force of the film to tantalum substrate is measured to be 24.56 MPa.