Ultrahigh Energy Storage Density and Excellent Charge–Discharge Properties of Bi2O3-Nb2O5-SiO2-Al2O3 Glass Ceramic with CeO2 Doping
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Bi2O3-Nb2O5-SiO2-Al2O3 glass–ceramic composites with different levels of CeO2 doping have been fabricated by controlled crystallization from a homogeneous glass matrix. The influence of the CeO2 doping level on the crystal phase, breakdown strength, microstructure, and energy storage performance was investigated. The results showed that the microstructure was clearly improved by CeO2 doping. A maximum theoretical energy storage density (J) of 20.9 J/cm3 was achieved in samples with 0.2 mol.% CeO2 doping, being clearly improved compared with samples without such addition (14.2 J/cm3). Also, the discharge time was found to be as short as 20 ns and the maximum power density exceeded 80 MW/cm3 under an electric field of 300 kV/cm. These results suggest that CeO2-doped Bi2O3-Nb2O5-SiO2-Al2O3 glass–ceramic composites are promising energy storage materials for use in pulsed-power systems.
KeywordsGlass ceramics dielectric materials/properties particles charge–discharge
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This research was supported by the Ministry of Science and Technology of China through the 973 Project (Grant No. 2015CB654601).
- 7.J. Tian, S. Wang, T. Jiang, K. Chen, J. Zhai, and B. Shen, J. Eur. Ceram. Soc. 39, 1164 (2018). https://doi.org/10.1016/j.jeurceramsoc.2018.11.040.CrossRefGoogle Scholar