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

Abstract

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.

Citation

Lu, Z., Sun, D., Wang, G., Zhao, J., Zhang, B., Wang, D., & Shyha, I. (2023). Energy storage properties in Nd doped AgNbTaO3 lead-free antiferroelectric ceramics with Nb-site vacancies. Journal of Advanced Dielectrics, 13(01), Article 2242006. https://doi.org/10.1142/s2010135x22420061

• 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
• DOI: https://doi.org/10.1142/s2010135x22420061
• Keywords: AgNbO3-based ceramics, antiferroelectric, energy storage
• Public URL: http://researchrepository.napier.ac.uk/Output/2952747