Preparation and Performance of (RuO_2/Co_3O_4).nH_2O Composite Films in Super Capacitor

The(RuO2/Co3O4).nH2O composite films electrode used in super capacitor was prepared from isopropanol solution of RuCl3.3H2O and Co(CH3COO)2 by in-situ thermal decomposition.The micro-morphology,phase transformation and electrochemical properties were studied by scanning electron micro-scope,XRD,infrared spectrometer and electrochemical method,respectively.The results show that,the com-posite films with n(Rn3+): n(Co2+)=1:3 exhibit the best performances after heat treatment at 260℃ for 3h.The specific capacitance and adhesive force of the composite films are 569F/g and 22.4MPa,respectively.The in-ternal resistance of the composite films is only 0.42- and its specific capacitance keep 97.6% of initial ca-pacitance after over 1000 charge-discharge cycles.