Characterization of Banana Pith as Electrolytic Media of a Bio-Battery Using Electrochemical Techniques
Abstract
A bio-battery made from the pith of ambun banana
variety has been used to characterize its material
using Cyclic Voltammetry (CV) and Impedance
Spectroscopy (IS) to have an expanded knowledge
about reversible behaviour of its electrolyte apart
from its ionic and electronic conductivity. The
current flow through the banana pith sandwiched
between two plates of Pt plates connected to a
constant voltage of 2 V dropped in the first 15
minutes and remained almost constant afterwards
for four hours indicating an initial polarization of
the media and mainly electronic conductivity at
the rest of the period with a visible browning of
separate layers near the electrodes. The IS curves
supported the particular behaviour by indicating
a drastic increase in the charge transfer resistance
into 120 kΩ. The obtained CV curves under
different scan rates provided sufficient evidence
to support possible electrochemical reversibility
of the electrolyte with an average redox potential
(E0) of 0.58 V and a diffusion coefficient of 1.01.