Details

Autor(en) / Beteiligte

• Zhang, Chao
• Xiao, Wenrong
• Zeng, Fangfang
• Su, Dong
• Du, Kang
• Qiu, Shiyong
• Fan, Guifen
• Lei, Wen
• Zhang, Haibo
• Jiang, Shenglin
• Wu, Jia-Min
• Zhang, Guangzu

Titel

Superior energy-storage performance in 0.85BiNaTiO-0.15NaNbO lead-free ferroelectric ceramics composition and microstructure engineering

Ist Teil von

• Journal of materials chemistry. A, Materials for energy and sustainability, 2021-04, Vol.9 (16), p.188-194

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Dielectric energy storage materials and capacitors are one of the key components for power electronics. Although strenuous efforts have been made to explore high-performance energy storage materials, the trade-off between the high polarization and high breakdown strength limits the energy density of the materials. In this work, a composition engineering strategy has been proposed to overcome the trade-off between the polarization and the breakdown strength. We introduced (Sr 1.05 Bi 0.3 )ScO 3 (SBS) into 0.85Bi 0.5 Na 0.5 TiO 3 -0.15NaNbO 3 (BNT-NN), where the Sc 2 O 3 embedded in the grains constructs insulating networks to enhance the breakdown strength, while the Sc 3+ and Sr 2+ ions enter the BNT-NN lattices and smash the R 3 c domains into ferroelectric polar nanoregions, maintaining the high polarization and decreasing the remnant polarization. As a result, 0.3 SBS doped BNT-NN shows a recoverable energy density ( W rec ) of 7.3 J cm −3 , one of the highest values for lead-free ferroelectric ceramics with a desirable energy efficiency ( η ) of 80%. Combined with its favorable temperature and frequency stabilities and discharge ability, the SBS doped 0.85Bi 0.5 Na 0.5 TiO 3 -0.15NaNbO 3 could be a promising material for practical energy storage applications. A high dielectric energy storage performance is achieved in a 0.85Bi 0.5 Na 0.5 TiO 3 -0.15NaNbO 3 lead-free ferroelectric ceramic via composition and microstructure engineering.