Excellent Energy-Storage Properties Achieved in BaTiO3-Based Lead-Free Relaxor Ferroelectric Ceramics via Domain Engineering on the Nanoscale

• DOI: 10.1021/acsami.9b10819
• Publication Date: 2019-08-27T12:23:21Z
• Authors: Ying Lin; Da Li; Miao Zhang; Shili Zhan; Yaodong Yang; Haibo Yang; Qibin Yuan
• Keywords: Piezoresponse force microscopy; Barium titanate; Ferroelectric ceramics; Thermal Stability

Barium titanate-based energy-storage dielectric ceramics have attracted great attention due to their environmental friendliness and outstanding ferroelectric properties. Here, we demonstrate that a recoverable energy density of 2.51 J cm-3 giant efficiency 86.89% can be simultaneously achieved in 0.92BaTiO3-0.08K0.73Bi0.09NbO3 ceramics. In addition, excellent thermal stability (25-100 °C) superior frequency (1-100 Hz) been obtained under 180 kV cm-1. The first-order reversal curve method transmission electron microscopy measurement show the introduction K0.73Bi0.09NbO3 makes domains transform into highly dynamic polar nanoregions (PNRs), leading concurrently enhanced properties by transition from relaxor (RFE). Furthermore, it is confirmed piezoresponse force appearance PNRs breaks long-range order some extent reduces microstructure, which explains performance RFE Therefore, this work has promoted practical application ability BaTiO3-based