  We have demonstrated a facile approach for synthesis of polypyrrole coated
yttria partially stabilized zirconia nanocomposites by in--situ synthesis
method. The properties of nanocomposite were studied and compared with those of
polypyrrole and 8$\%$ YSZ. The electrochemical properties were recognized by
cyclic voltammetry, charge-discharge and electrochemical impedance
spectroscopy. The SEM of YSZ/PPy nanocomposite showed globular and porous
surface morphology. In the present work, we reveal the YSZ/PPy nanocomposite as
novel electrode material for supercapacitor. The supercapacitive performance of
YSZ/PPy electrode was studied in an aqueous 0.1 N H$_{2}$SO$_{4}$ electrolyte
solution. The highest specific capacitance (C$_{s}$) for YSZ/PPy electrode
observed to be 640 Fg$^{-1}$. The specific energy (E$_{s}$), specific power
(P$_{s}$) and coulomb efficiency ($\eta\%$) are observed to be 12.8
Whkg$^{-1}$, 51 kWkg$^{-1}$ and 98$\%$ respectively. This electrode shows the
outstanding electrochemical stability for more than 1000 continuous
charging--discharging cycles. These notable parameters of YSZ/PPy composite
opens up a new avenue for the study to explore this composite as an efficient
electrode material.
