Energy Storage using Graphene-Polymer nanocomposite thin film
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Authors
Aphale, Ashish
Wei, Ruoqi
Santiago, Angela
Patra, Prabir
Issue Date
2014-03-28
Type
Presentation
Language
en_US
Keywords
Engineering , Faculty research day , Graphene-polymer , Nanocomposite
Alternative Title
Abstract
There is an unmet need for efficient and environmentally-friendly ultrathin energy storage devices. Here we report a thin and flexible energy
storage mechanism using electrically conductive polymer (ECPs) polypyrrole and atomically thin material and a highly conductive allotrope of
carbon graphene which is coated on thin paper substrate made from cladophora aegagropila algae cellulose. The cyclic voltammetry data exhibits
a capacitive behavior of the device, as do the multimeter readings of the voltage while charging and discharging exhibit a battery performance.
The device demonstrated hybrid characteristics in which graphene behaved as an electrochemical double layer capacitance (EDLC) and PPy
behaved as a pseudo-capacitor. With significant mechanical strength and flexibility, the device shows good power density, higher charge discharge
cycles, and lower self discharge rates. TEM and SEM images show well dispersion of graphene on the surface of cellulose fibers. In order to
decrease the effective weight of the insulating material and to achieve a controlled thickness of the electrode in few microns to nm range we
propose the fabrication of the thin film using electrodeposition technique. Preliminary experiments show that using a small electrode of 1cm2 area
we can achieve up to 1.5 V of potential across the terminal.