Review of lead-free Bi-based dielectric ceramics for energy-storage applications
Lisong Li, Pengyuan Fan, Mengqi Wang, Naohisa Takesue, David Salamon, A. N. Vtyurin, Yangjun Zhang, Hua Tan, Bo Nan, Ya Lu, Laijun Liu, Haibo Zhang
Abstract
Abstract Dielectric energy-storage ceramics have the advantages of high power density and fast charge and discharge rates, and are considered to be excellent candidate materials for pulsed power-storage capacitors. At present, the application of dielectric energy-storage ceramics is hindered by their low energy density and the fact that most of them contain elemental lead. Therefore, lead-free dielectric energy-storage ceramics with high energy storage density have become a research hot spot. In this paper, we first present the requirements that dielectric energy-storage capacitors impose on the properties of ceramic materials. We then review our previous research work combined with research progress into bismuth (Bi)-based lead-free energy-storage ceramics including Bi 0.5 Na 0.5 TiO 3 (BNT), BiFeO 3 , and Bi 0.2 Sr 0.7 TiO 3 , in which the composition design ideas and related energy-storage characteristics of BNT-based lead-free energy-storage ceramics are emphasized. At the same time, we highlight the problems faced by Bi-based lead-free energy-storage ceramics and some strategies for addressing them. Finally, we examine the future prospects of research into Bi-based lead-free energy-storage ceramics.