A novel synthesis of ternary composite film of: Reduced Graphene oxide /Polyaniline/Prussian Blue via layer-by-layer assembly for supercapacitor electrode

Abstract

An innovative method of preparing a ternary film of composite of Graphene,

Polyaniline and Prussian blue on graphite electrode. The film has been manufactured by layer-by-layer technique.

The procedure has four steps: exfoliation then electroreduction of the graphite electrode, electro polymerization of aniline as second layer and finally deposition of Prussian blue layer chemically on top to obtain the ternary composite film (LRGO/Pani/PB).

The composite film obtained on graphite electrode was investigated by (Uv-Vis and FTIR) spectroscopy. Electrochemical properties of the electrode were investigated by cyclic voltammetry (CV), Galvanic Charge/Discharge (GCD) and Electrochemical impedance spectroscopy (EIS) techniques. The specific capacity of the ternary film reached up to (718.9 F/g at a current density of 0.1 A/g) and (401.8 F/g at 50 mV/s scan rate) with extended cycling stability up to (97.1%) after (1000) cycles. A prototype of supercapacitor was constructed with solid state gel electrolyte and tested for lighting both red and white LED.