Antimony substituted layered perovskites for energy storing devices

Abstract

The demand of energy storage devices can be solved by an intense research for developing
more energy efficient materials used both for energy storage like super capacitors, batteries as well as
energy converter devices such as photovoltaic, perovskite solar cell etc. Barium Bismuth Titanate
ceramic is one of the promising candidates in the research area for its huge application in storage
devices, perovskite solar cell, recording media, robotics and sensors etc. BaBi4-xSbxTi4O15(x= 0, 1) is
one of the important class of Aurivillius Bi based layered perovskite. Both the compounds are well
prepared through high temperature mixed oxide process at a calcination temperature 8500C followed
by sintering process at 8750C. The creation of single-phase compound is confirmed from XRD analyses
at room temperature. The microstructure analyses of the compounds obtained from Scanning electron
microscope show that there is decrease in particle size on Sb substitution at Bi site. The dielectric
properties are investigated in the frequency range 102 Hz -106 Hz with temperature range 300C-5000C.
There is a broadening of phase transition when Sb+3 is substituted at Bi site. The measured values of
activation energy calculated from ac conductivity data recommend that conduction occurs because of
ionic and space charge movement. The values of remanent polarisation and coercive field are also
calculated from P~ E loop analysis