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Energy storage properties in Nd doped AgNbTaO3 lead-free antiferroelectric ceramics with Nb-site vacancies

Lu, Zhilun; Sun, Dongyang; Wang, Ge; Zhao, Jianwei; Zhang, Bin; Wang, Dawei; Shyha, Islam


Zhilun Lu

Ge Wang

Jianwei Zhao

Bin Zhang

Dawei Wang


It is crucial to discover lead-free materials with ultrahigh recoverable energy density (Wrec) that can be employed in future pulse power capacitors. In this work, a high Wrec of 4.51 J/cm3 was successfully obtained in lead-free Nd-doped AgNb0.8Ta0.2O3 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.

Journal Article Type Article
Acceptance Date Oct 28, 2022
Online Publication Date Dec 3, 2022
Publication Date 2023-02
Deposit Date Nov 11, 2022
Publicly Available Date Feb 15, 2023
Journal Journal of Advanced Dielectrics
Print ISSN 2010-135X
Electronic ISSN 2010-1368
Publisher World Scientific Publishing
Peer Reviewed Peer Reviewed
Volume 13
Issue 01
Article Number 2242006
Keywords AgNbO3-based ceramics, antiferroelectric, energy storage
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