Abstract:
This dissertation is dedicated to study of The Effect of Li Doping in Titanates
as an Electrolyte for Fuel Cells. Fuel cell is one of the energy devices and use
to provide clean energy in efficient way. Therefore, in this project our aim is
to enhance the ionic conductivity using lithium as dopant into its titanium sites
to improve ionic conductivity at lower temperature. In this research work,
proposed novel electrolyte will be strontium titanate (SrTiO3) and ―lithium
doped Strontium titanates‖ electrolyte material for fuel cell will be prepared
via co-precipitation and sol-gel routes. The effect of Li doping in titanates will
be studied to avoid the current leakage issues which ultimately enhance the
performance of the fuel cell. Different properties like crystal structure, ionic
behavior and conductivity will be studied. High ionic conductivity and better
density is expected as an outcome of this study. To enhance the efficiency of
such devices and the electronic behavior the doping of the materials need to be
studied. Therefore, in this research work titanate based and doped material as
SrTiO3 are developed for the fuel cell by Co-precipitation and Sol-gel methods
and then fuel cell performance of the prepared materials are studied. The
structural properties of Li doped prepared material is to be studied as SrTiO3.
Tetragonal structure is achieved from SrTiO3 and cubic structure is achieved at
LiO2 that is analyzed by X-Ray diffraction (XRD). Surface morphology of
prepared material is studied by scanning electron microscopy (SEM) have
homogeneous and porous structure. The material shows relatively low
electronic and ionic conductivity in the wide range of temperature. That
material eventually increases its ionic conductivity to promote its proton
conduction. SrTiO3 is perovskite oxide that shows excellent chemical and
structural stability for low temperature SOFCs.
