Skip to main content
placeholder image

(Ba,Sr)TiO3-Bi(Mg,Hf)O3Lead-Free Ceramic Capacitors with High Energy Density and Energy Efficiency

Journal Article


Abstract


  • Dielectric capacitors with high energy storage performance have been actively studied for emerging applications. In this work, a series of environmental friendly lead-free relaxor ferroelectric ceramics, (1 - x)(Ba0.75Sr0.25)TiO3-xBi(Mg0.5Hf0.5)O3 with 0 ≤ x ≤ 0.5 [abbreviated as (1 - x)BST-xBMH], were synthesized by a high-temperature solid-state reaction method. The perovskite structure without any secondary phase can be obtained in samples with x ≤ 0.4. As the BMH content increases, the polarization-electric field (P-E) loop becomes slim and slanted. A large recoverable energy storage density of 4.3 J/cm3 and high energy efficiency of 92% were achieved simultaneously in 0.6BST-0.4BMH at 390 kV/cm. The fine grain morphology with minimal porosity and the high conductivity activation energy were responsible for the enhanced breakdown strength. Of particular importance is that the 0.6BST-0.4BMH ceramic shows excellent temperature stability and cycling reliability with energy density variations below 3 and 4%, respectively. In addition, the 0.6BST-0.4BMH ceramic possesses fast discharge time (∼0.59 μs) with a high power density of 3.5 MW/cm3. All these merits reveal that the lead-free 0.6BST-0.4BMH relaxor ceramic is a promising candidate for high-temperature and high-power energy storage capacitor applications.

Publication Date


  • 2020

Citation


  • Kong, X., Yang, L., Cheng, Z., Liang, G., & Zhang, S. (2020). (Ba,Sr)TiO3-Bi(Mg,Hf)O3Lead-Free Ceramic Capacitors with High Energy Density and Energy Efficiency. ACS Applied Energy Materials, 3(12), 12254-12262. doi:10.1021/acsaem.0c02320

Scopus Eid


  • 2-s2.0-85097824493

Start Page


  • 12254

End Page


  • 12262

Volume


  • 3

Issue


  • 12

Abstract


  • Dielectric capacitors with high energy storage performance have been actively studied for emerging applications. In this work, a series of environmental friendly lead-free relaxor ferroelectric ceramics, (1 - x)(Ba0.75Sr0.25)TiO3-xBi(Mg0.5Hf0.5)O3 with 0 ≤ x ≤ 0.5 [abbreviated as (1 - x)BST-xBMH], were synthesized by a high-temperature solid-state reaction method. The perovskite structure without any secondary phase can be obtained in samples with x ≤ 0.4. As the BMH content increases, the polarization-electric field (P-E) loop becomes slim and slanted. A large recoverable energy storage density of 4.3 J/cm3 and high energy efficiency of 92% were achieved simultaneously in 0.6BST-0.4BMH at 390 kV/cm. The fine grain morphology with minimal porosity and the high conductivity activation energy were responsible for the enhanced breakdown strength. Of particular importance is that the 0.6BST-0.4BMH ceramic shows excellent temperature stability and cycling reliability with energy density variations below 3 and 4%, respectively. In addition, the 0.6BST-0.4BMH ceramic possesses fast discharge time (∼0.59 μs) with a high power density of 3.5 MW/cm3. All these merits reveal that the lead-free 0.6BST-0.4BMH relaxor ceramic is a promising candidate for high-temperature and high-power energy storage capacitor applications.

Publication Date


  • 2020

Citation


  • Kong, X., Yang, L., Cheng, Z., Liang, G., & Zhang, S. (2020). (Ba,Sr)TiO3-Bi(Mg,Hf)O3Lead-Free Ceramic Capacitors with High Energy Density and Energy Efficiency. ACS Applied Energy Materials, 3(12), 12254-12262. doi:10.1021/acsaem.0c02320

Scopus Eid


  • 2-s2.0-85097824493

Start Page


  • 12254

End Page


  • 12262

Volume


  • 3

Issue


  • 12