  Perovskite-type Ba0.9Sr0.1Ti0.9Sn0.1O3(BSTSn) ceramic was synthesized by the
sol gel method. The P E hysteresis loops were recorded at different
temperatures to investigate the ferroelectric and energy storage properties of
BSTSn ceramic. Enhanced recoverable energy density and high energy storage
efficiency were found to be 58.08 mJ/cm3 and 84.36 %, respectively at room
temperature (RT) under a moderate applied electric field of 20 kV/cm. The
electrocaloric effect (ECE) in the BSTSn ceramic was explored using two
different approaches based on P E hysteresis loops, and pyroelectric current
measurements. The largest electrocaloric (EC) temperature change of 0.63 K was
determined using the Maxwell relationship obtained near RT under 20 kV/cm. The
corresponding EC responsivity value of 0.31 K.mm/kV is one of the highest
reported values in lead-free ferroelectrics near RT. This study demonstrates
that the BSTSn ceramic is a promising candidate for solid-state cooling and
energy storage applications.
