▎ 摘　　要

PPy/graphene/rare-earth ions composites were prepared by in-situ polymerization. The structure and morphology of the composites are characterized by transmission electron microscope and scanning electron microscope, the results revealed that the graphene nanosheets were distributed homogeneously within the PPy matrix. Cyclic voltammetry was used to study the electrochemical properties of composites in K3Fe(CN)(6) (pH 7.4) at a scan rate of 10 mV s(-1) with a applied voltage range of -0.2 to 0.6 V, indicating that composite has excellent cycling performance. These results demonstrate the viability of the use of this composites as electrode material for the capacitors.