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Structural, dielectric, ferroelectric, energy storage properties, andelectrocaloric effect were studied in lead-free ceramicBa$_{0.95}$Ca$_{0.05}$Ti$_{0.89}$Sn$_{0.11}$O$_3$ (BCTSn) elaborated by sol-gelmethod. Phase purity structure was confirmed from X-ray data using Rietveldrefinement analysis which revealed the coexistence of tetragonal (P4mm) andorthorhombic (Amm2) symmetries at room temperature. Phase transitions weredetected by dielectric and differential scanning calorimetry results. Energystorage properties were determined from P-E hysteresis, and the electrocaloricproperties were calculated indirectly via the Maxwell approach. The large valueof electrocaloric temperature change of $\Delta$T=0.807 K obtained at arelatively small field of 30 kV cm$^{-1}$ and high energy storage efficiencycan make BCTSn ceramic a promising candidate for environmentally friendlyrefrigeration and energy storage applications.

Electrocaloric effect and high energy storage efficiency in lead-free  Ba$_{0.95}$Ca$_{0.05}$Ti$_{0.89}$Sn$_{0.11}$O$_3$ ceramic elaborated by  sol-gel method