Praseodymium oxide/polypyrrole nanocomposites for electrochemical energy storage

We report the synthesis of a series of praseodymium oxide/polypyrrole (Pr 6 O 11 /PPy) nanocomposites , and their application in the electrochemical energy storage . The Pr 6 O 11 /PPy nanocomposites were synthesized by the in situ surface-initiated polymerization technique based on the amine-functionalized Pr 6 O 11 nanoparticles . The nanocomposites exhibit the well-defined core/shell structure observed by transmission electron microscopy (TEM) and scanning electron microscope (SEM). Thermogravimetric analysis reveals a significantly enhanced thermal stability with the addition of the amine-functionalized Pr 6 O 11 nanoparticles. Furthermore, they possess weak temperature dependence of the conductivity and the highest specific capacitance of 400   F   g −1 at the charge–discharge current density of 10   mA   cm −2 in 1.0   M NaNO 3 electrolyte solution when being used as the electrode material for supercapacitor .