Superior comprehensive energy storage performances in Eu-doped AgNbO3 antiferroelectric ceramics
CHEMICAL ENGINEERING JOURNAL(2023)
摘要
Antiferroelectric (AFE) dielectrics are considered promising materials for pulse power applications due to their high energy density. However, the energy storage performance of AgNbO3 lead-free AFE ceramics suffers from low breakdown strength (Eb) and weak AFE stability at room temperature. Along these lines, in this work, the tape-casting process together with Eu-doping was used to improve Eb and enhance AFE stability of the AgNbO3 ceramics. As a result, an ultrahigh recoverable energy storage density of 10.0 J/cm3 was obtained in the (Ag0.91Eu0.03)NbO3 ceramic, which surpasses all the reported values of AgNbO3-based ceramics in the literatures. Meanwhile, the recoverable energy storage density of (Ag0.91Eu0.03)NbO3 ceramic showed excellent temperature-and frequency-stability. Interestingly, a remarkable discharge energy density of 8.0 J/cm3 was obtained in the pulsed charge/discharge test. These results clearly indicate that the (Ag0.91Eu0.03)NbO3 ceramics prepared via the tape-casting process exhibit great potential for energy storage applications and shed light on the design of energy storage ceramics in other materials.
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关键词
Antiferroelectric,AgNbO3-based ceramics,Energy storage performance,Tape-casting
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