超级电容器用羧基氧化钌薄膜的充放电性能

Charge-discharge performance of carboxyl ruthenium oxide film for supercapacitor

以RuCl3.3H2O异丙醇溶液为前驱体,分别加热到250、270、300和400℃制备超级电容器用羧基氧化钌薄膜。借助红外光谱仪、扫描电镜、透射电镜和电化学分析仪等手段,研究薄膜的物相结构、微观形貌和电容性能。结果表明:经270℃保温2 h处理后,薄膜的成分为羧基氧化钌。随热处理温度升高,薄膜的比电容逐渐降低,快速充放电性能提高。薄膜的比表面积为88 m2/g;薄膜的比电容达到859 F/g,附着力为20.13 MPa,16 000次循环充放电后比电容保持在充放电循环前的99.7%。

As a good film electrode material for supercapacitor,carboxyl ruthenium oxide has been prepared using precursor of isopropyl alcohol solution of RuCl3？3H2O by in-situ decomposition.The phase structure,micro-morphology and capacitance of the film have been studied by infrared spectrometer,scanning electron microscope（SEM）,transmission electron microscope（TEM） and electrochemical method,respectively.The results show that the film is RuOδ（OOCCH3）λ？nH2O after heat treated at 270 ℃ for 2 h.The specific capacitance of the film decreases gradually and the fast charging and discharging performance improves with temperature increasing.Once the film being treated at 270 ℃ for 2 h with specific surface area of 88 m2/g,its specific capacitance reaches 859 F/g,and maintains at 99.7% after 16 000 charge-discharge cycles.The adhesive force of the film is measured to be 20.13 MPa.