Enhanced energy storage properties of Bi(Ni2/3Nb1/6Ta1/6)O3-NaNbO< sub>3 solid solution lead-free ceramics

作者：Pan, Yue; Wang, Xiang; Dong, Qinpeng; Wang, Jiaming; Chen, Hongyun; Dong, Xiaoyan; Deng, Lian^*; Zhang, Hailin; Chen, Xiuli^*; Zhou, Huanfu

来源：Ceramics International, 2022, 48(18): 26466-26475.

DOI：10.1016/j.ceramint.2022.05.341

• NaNbO3
• Energy storage density
• Relaxor ferroelectrics
• Pulse discharge characteristics

Sodium niobate energy storage ceramics with good environmental performance are widely used in electric power conversion and pulse power system, large energy storage density and high efficiency, huge power density and charge and discharge faster. In this work, (1-x)NaNbO3-xBi(Ni2/3Nb1/6Ta1/6)O-3 [(1 x)NN-xBNNT] (0.12 <= x <= 0.18) ceramics system were prepared by solid state reaction method. By introducing Bi(Ni2/3Nb1/6Ta1/6)O-3 (BNNT), a relaxation strategy was constructed, which significantly improved the energy storage properties of NaNbO3 (NN) based ceramics. Finally, comparatively high recoverable energy density (W-rec) of 3.43 J/cm(3) and large energy storage efficiency (eta) of 83.3% were obtained in 0.86NN 0.14BNNT ceramics. Besides discharge energy density (W-d) of 0.69 J/cm(3), ultra fast charge-discharge rate (t(0.9)) of 55 ns, the power density (P-D) of 70.66 MW/cm(3) and the current density (C-D) of 883.23 A/cm(2) were also observed in ceramic.

• 单位
  桂林理工大学