A novel lead-free ceramic with layered structure for high energy storage applications

Abstract In recent years, ceramic capacitors have attracted much attention due to their high energy storage properties and fast charge-discharge capability. The (SrTiO 3 +0.5 wt%Li 2 CO 3 )/(0.93Bi 0.5 Na 0.5 TiO 3 -0.07Ba 0.94 La 0.04 Zr 0.02 Ti 0.98 O 3 ) (STL/(BNT-BLZT)) lead-free ceramic with layered structure was designed and fabricated via the tape-casting and subsequently laminating technique, and sintered by the conventional solid state sintering method in this study. The results reveal that the STL/(BNT-BLZT) multilayer ceramic sintered at 1175 °C with an excellent charge energy density of 3.67 J/cm 3 and discharge energy density of 2.72 J/cm 3 under 294 kV/cm. In addition, the energy storage properties of STL/(BNT-BLZT) multilayer ceramic also displays good thermal stability from 25 to 100 °C at the electric field of 100 kV/cm. These results indicate that the STL/(BNT-BLZT) multilayer ceramic may be a promising lead-free material for high energy storage applications.