Journal of Inorganic Materials ›› 2024, Vol. 39 ›› Issue (9): 1022-1028.DOI: 10.15541/jim20240087

Special Issue: 【信息功能】介电、铁电、压电材料(202409)

• RESEARCH ARTICLE • Previous Articles     Next Articles

Preparation and Energy Storage Properties of A-site La/Sr Co-doped PbZrO3 Thin Films

SHEN Hao1(), CHEN Qianqian1, ZHOU Boxiang1, TANG Xiaodong1, ZHANG Yuanyuan1,2()   

  1. 1. Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Science, East China Normal University, Shanghai 200241, China
    2. Chongqing Institute of East China Normal University, Chongqing 401120, China
  • Received:2024-02-28 Revised:2024-03-11 Published:2024-09-20 Online:2024-03-30
  • Contact: ZHANG Yuanyuan, associate professor. E-mail: yyzhang@ee.ecnu.edu.cn
  • About author:SHEN Hao (1990-), male, Master candidate. E-mail: sh17855518188@163.com
  • Supported by:
    Natural Science Foundation of Chongqing Municipality(CSTB2022NSCQ-MSX1474)

Abstract:

Antiferroelectric materials have been extensively studied in the field of dielectric energy storage due to their ultra-high power density. Lead zirconate (PbZrO3, PZO), as a prototype of antiferroelectric material, has been one of the most studied antiferroelectric materials, and research on enhancing energy storage performance of PZO-based materials is a hotspot of the current study. In this work, further improvement of the energy storage performance of PZO-based antiferroelectric thin films was realized by further doping small-radius Sr2+ into the A-site of the PZO perovskite structure on the basis of La3+-doped PZO. A series of antiferroelectric thin films of A-site La/Sr co-doped Pb0.94-xLa0.04SrxZrO3 (Sr-PLZ-x, x = 0, 0.03, 0.06, 0.09, 0.12) were prepared by Sol-Gel method, and the effects of Sr2+ doping on the crystal structure and electrical properties such as ferroelectricity, energy storage, and fatigue properties of Sr-PLZ-x antiferroelectric films were systematically investigated. The results show that with the doping of Sr2+, the lattice constants are gradually reduced, and the saturation polarization of the films is first slightly increased and then maintained, but finally gradually decreased. The tolerance factors of Sr-PLZ-x films are reduced with increasing Sr2+ doping content, while the antiferroelectricities of the films are enhanced. Both the switching field and the breakdown strength are increased, resulting in an improved energy storage performance of Sr-PLZ-x films. At x=0.03, the energy storage performance of Sr-PLZ-x antiferroelectric film reaches the highest, with the energy storage density and efficiency are 31.7 J/cm3 and 71%, respectively. Meanwhile, the doping of Sr2+ also makes the fatigue characteristics of Sr-PLZ-x antiferroelectric films further improved. The x=0.12 antiferroelectric film exhibits only 3.4% and 2.7% degradation in energy storage density and energy storage efficiency after 107 cycles. In summary, the method of A-site La/Sr co-doping can effectively improve the energy storage performance of PZO-based antiferroelectric films.

Key words: elemental doping, lead zirconate, antiferroelectric, energy storage

CLC Number: