High energy storage properties of (Nb0.5La0.5)4+ complex-ion modified (Ba0.85Ca0.15)(Zr0.10Ti0.90)O 3 ceramics

• Published in: Journal of advanced dielectrics 2024-08, Vol.14 (4)
• Main Authors: Sun, Yaqiong, Dang, Santan, Peng, Zhanhui, Chen, Bi, Zhang, Yibing, Wu, Di, Liang, Pengfei, Wei, Lingling, Chao, Xiaolian, Yang, Zupei
• Format: Article
• Language: English
• ISSN: 2010-135X; 2010-1368
• DOI: 10.1142/S2010135X24400101

In this work, a traditional solid-state method was adopted to prepare dense Ba[Formula: see text]Ca[Formula: see text][(Zr[Formula: see text]Ti[Formula: see text])[Formula: see text]–(Nb[Formula: see text]La[Formula: see text]) x ]O 3 (BCZT–xNL) lead-free relaxation ferroelectrics with excellent energy storage performance (ESP). Remarkably, a large breakdown field strength of BDS ([Formula: see text][Formula: see text]kV/cm) resulting from decreased grain size by double ions doping at the B-site was achieved in BCZT–xNL ceramics. Especially, the BCZT–0.12NL ceramic displays a good recoverable energy density ([Formula: see text]) of 3.1[Formula: see text]J/cm 3 , a high efficiency of 86.7% ([Formula: see text]) and a superior fatigue resistance, as well as a superior charge–discharge performance ([Formula: see text][Formula: see text]A/cm 2 , [Formula: see text][Formula: see text]MW/cm 3 , [Formula: see text][Formula: see text]J/cm 3 , [Formula: see text][Formula: see text]ns) and good thermal stability. Besides, upon NL doping, the FE to RFE phase transition results in a dielectric behavior traversing the relaxation phase ([Formula: see text]) accompanied by frequency dispersion, which is beneficial to improve ESP. The superior ESP in this work indicates that BCZT–0.12[Formula: see text]NL ceramics are a promising candidate used in energy storage capacitors.