Nanoplatelets of metal oxides with interesting porous structure were obtained by thermal treatment of Ni/Al hydrotalcite. Structural and surface properties of the porous oxides were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM and HRTEM), and N-2 adsorption-desorption. The electrochemical performance of the electrodes was investigated by cyclic voltammetry, electrochemical impedance spectroscopy and constant current charge-discharge measurements. Ni/Al hydrotalcite calcined at 450 A degrees C (NA-450) displayed a maximum specific capacitance (419.0 F g(-1)) due to the porous structure with the highest specific surface area (142.3 m(2) g(-1)) and small pore size (4.4 nm). The present study shows the potential of NiO nanoplatelets composite material for electrochemical pseudo-capacitors.