配制RuCl3·3H2O和Co(CH3COO)2的异丙醇混合溶液, 采用原位热分解法制备了超级电容器用(RuO2/ Co3O4)·nH2O复合薄膜电极. 借助扫描电镜、X射线衍射仪、红外光谱仪、电化学分析仪等表征薄膜的微观形貌、物相转变以及电化学性能. 结果表明, 当涂覆液中n(Ru3+):n(Co2+)=1:3时, 复合薄膜经260℃热处理3h达到最佳的综合性能, 比电容为569F/g, 附着力为22.4MPa, 内阻仅为0.42Ω, 1000次充放电循环后比电容保持在初始电容量的97.6%.
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 microscope, XRD, infrared spectrometer and electrochemical method, respectively. The results show that, the composite 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 internal resistance of the composite films is only 0.42Ω and its specific capacitance keep 97.6% of initial capacitance after over 1000 charge-discharge cycles.
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