Preparation and Performance of (RuO₂/Co₃O₄)·nH₂O 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(Rn 3+ ): n(Co 2+ )=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 0.42Ω and its specific capacitance keep 97.6% of initial ca-