Journal of Advanced Dielectrics, Volume. 13, Issue 1, 2242006(2023)
Energy storage properties in Nd-doped AgNbTaO3 lead-free antiferroelectric ceramics with Nb-site vacancies
Zhilun Lu1、*, Dongyang Sun1, Ge Wang2, Jianwei Zhao3, Bin Zhang3, Dawei Wang3, and Islam Shyha1
Author Affiliations
1School of Computing, Engineering and The Built Environment, Edinburgh Napier University, Edinburgh EH10 5DT, UK2Department of Materials, University of Manchester, Manchester S13 9PL, UK3Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. Chinashow less
It is crucial to discover lead-free materials with ultrahigh recoverable energy density () that can be employed in future pulse power capacitors. In this work, a highof 4.51 J/cm3 was successfully obtained in lead-free Nd-doped AgNbTaO3 antiferroelectric ceramics at an applied electric field of 290 kV/cm. It is discovered that Nd doping paired with Nb-site vacancies could stabilize the antiferroelectric phase by lowering the temperatures of the M1–M2 and M2–M3 phase transitions, which leads to higher energy storage efficiency. Furthermore, Nd and Ta co-doping will contribute to the electrical homogeneity and low electrical conductivity, resulting in large breakdown strengths. Aliovalent doping in Ag-site with Nb-site vacancies serves as a novel strategy for the construction of AgNbO3-based ceramics with excellent energy storage performance.It is crucial to discover lead-free materials with ultrahigh recoverable energy density () that can be employed in future pulse power capacitors. In this work, a highof 4.51 J/cm3 was successfully obtained in lead-free Nd-doped AgNbTaO3 antiferroelectric ceramics at an applied electric field of 290 kV/cm. It is discovered that Nd doping paired with Nb-site vacancies could stabilize the antiferroelectric phase by lowering the temperatures of the M1–M2 and M2–M3 phase transitions, which leads to higher energy storage efficiency. Furthermore, Nd and Ta co-doping will contribute to the electrical homogeneity and low electrical conductivity, resulting in large breakdown strengths. Aliovalent doping in Ag-site with Nb-site vacancies serves as a novel strategy for the construction of AgNbO3-based ceramics with excellent energy storage performance.
