  Lead-free Ba0.85Ca0.15Zr0.10Ti0.90O3 (BCZT) ceramic exhibits excellent
dielectric, ferroelectric and piezoelectric properties at the Morphotropic
Phase Boundary (MPB). Previously, we demonstrated that the use of the anionic
surfactant Sodium Dodecyl Sulfate (SDS, NaC12H25SO4) could enhance the
dielectric properties of BCZT ceramic using surfactant-assisted solvothermal
processing [1]. In the present study, structural, dielectric, ferroelectric
properties, as well as electrocaloric effect and energy storage performances of
this BCZT ceramic were thoroughly investigated. X-ray diffraction (XRD)
measurements revealed the presence of single perovskite phase at room
temperature with the coexistence of orthorhombic and tetragonal symmetries.
In-situ Raman spectroscopy results confirmed the existence of all phase
transitions from rhombohedral through orthorhombic and tetragonal to cubic
symmetries when the temperature varies as reported in undoped-BaTiO3. Evolution
of energy storage performances with temperature have been investigated. BCZT
ceramic exhibits a high energy storage efficiency of ~80% at 120 {\deg}C. In
addition, the electrocaloric responsivity was found to be 0.164.10-6 K.m/V at
360 K.
