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| Research on the Energy Storage Performance and Dielectric Mechanism of Sr0.7Bi0.2TiO3-doped Ba0.85Ca0.15Zr0.1Ti0.9O3-based Ceramics |
| HAO Jiaxi1, MENG Fanxu2,*, WANG ChangHao2,*
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1 School of Materials Science and Engineering, Jilin Institute of Chemical Technology, Jilin city 132022, china
2 School of Science, Jilin Institute of Chemical Technology, Jilin city 132022, china
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Abstract With the rapid development of energy storage technology and modern electronic technology, the demand for high-performance energy storage materials is increasing. Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT)-based ceramics have attracted much attention because of their excellent dielectric and ferroelectric properties. However, the low energy storage density and energy storage efficiency limit its further development in the field of energy storage. By precisely controlling the doping concentration and component design, a series of (1-x)[0.92Ba0.85Ca0.15Zr0.1Ti0.9O3-0.08Bi(Zn2/3Ta1/3)O3]-x(Sr0.7Bi0.2)TiO3 ceramics were prepared using BCZT ceramics as the matrix. At the same time, through an in-depth analysis of the structure and dielectric properties of the doped ceramics, the effect of Sr0.7Bi0.2TiO3 doping on the energy storage properties of BCZT-based ceramics was studied. The results show that the doped ceramics samples have a single perovskite structure and the dielectric relaxation behavior is significantly improved. When the amount of Sr0.7Bi0.2TiO3 doping is x = 0.40, the energy storage performance is the best, and the released energy density and energy storage efficiency are Wrec = 5.431 J/cm3 and η = 93.38%, respectively. This provides a theoretical basis and experimental guidance for optimizing the energy storage performance of lead-free ferroelectric ceramics.
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Published: 09 April 2025
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