Graphene Quantum Dots based Polymer Composite for Energy Device Application

Devendrappa H

Abstract

Graphene Quantum Dots based Polymer Composite for Energy Device Application

A new carbon based material, Graphene quantum dots
(GQDs) is becoming an advanced multifunctional material
for its novel chemical / physical properties including
nanometer size, good electrical conductivity, abundant
edge defects, high mobility, stable photoluminescence
and better photoelectric properties making them promising
for various energy storage and conversion devices.
The glucose derived water soluble crystalline GQDs with
uniform size less than 7nm are synthesized by using microwave
assisted hydrothermal method. GQDs composite
with conjugate polymers was successfully synthesized in
situ chemical polymerization, they have exhibiting superior
optical, electrical and electrochemical properties are
encourages for various application in energy storage devices.
To fabricated double layer electrode of PPY- GQDs
composite and observed a high specific capacitance, good
stability. The obtained composites were characterized
using FT-IR to study the chemical interaction, Surface
morphology of prepared samples was investigated using
FESEM, and Optical properties were studied using
UV-Visible spectroscopy. The application of the PGC
composites is evaluated as a supercapacitor material by
using CV and galvanostatic charging discharging techniques.
The specific capacitance of composite film was
228.7F/g shows that reported electrodes has faster power
response capacity and better cycle stability. Obtained results
shows high specific capacitance and good stability
of polymer nanocomposite may encourage the promising
application in high performance energy storage devices.