Copper barium titanate-based energy storage ceramic material with high energy storage density and high efficiency and preparation method thereof: Fid-Bau Portal

Copper barium titanate-based energy storage ceramic material with high energy storage density and high efficiency and preparation method thereof

CHEN ZHIHUI / BIAN ZHENGXIANG / LI ZHIWEI / REN YURONG / QIU JIANHUA

Abstract

The invention belongs to the field of energy storage ceramic materials, and particularly provides a copper barium titanate-based energy storage ceramic material with high energy storage density and high efficiency and a preparation method thereof, the chemical composition of the material is (1-x) Ba (Ti0. 97Cu0. 03) O3-xNa (Nb1-yTay) O3 (x is more than or equal to 0.02 and less than or equal to 0.2, and y is more than or equal to 0.05 and less than or equal to 0.2). Ions of different valence states are introduced into the A site and the B site of Ba (Ti0. 97Cu0. 03) O3 ceramic at the same time, so that charge mismatch is generated, Na < + > is introduced into the A site, Na < + >-Na < + > ion pairs are formed, local polarization intensity is improved, energy storage density is improved, Nb < 5 + > and Ta < 5 + > heterovalent ions are introduced into the B site, oxygen octahedron distortion and B site cation displacement increase are caused, lattice distortion is generated, and energy storage efficiency and breakdown strength are improved. The method has the advantages of simple steps, low equipment requirement and large-scale production.

本发明属于储能陶瓷材料领域，具体提供了一种兼具高储能密度和高效率的铜钛酸钡基储能陶瓷材料及其制备方法，材料化学组成为(1‑x)Ba(Ti0.97Cu0.03)O3‑xNa(Nb1‑yTay)O3(0.02≤x≤0.2，0.05≤y≤0.2)。在Ba(Ti0.97Cu0.03)O3陶瓷的A位和B位同时引入不同价态的离子，从而产生电荷错配，A位引入Na+，构成Na+‑Na+离子对，提高局部极化强度，从而改善储能密度，B位引入Nb5+和Ta5+异价离子，造成氧八面体的扭曲和B位阳离子位移的增加，产生晶格畸变，从而提高储能效率和击穿强度。该方法步骤简便，设备要求低，可以大规模生产。

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