TY - JOUR
T1 - Effective strategy to improve energy storage properties in lead-free (Ba0.8Sr0.2)TiO3-Bi(Mg0.5Zr0.5)O3 relaxor ferroelectric ceramics
AU - Wang, Wen
AU - Zhang, Leiyang
AU - Li, Chao
AU - Alikin, D. O.
AU - Shur, V. Ya
AU - Wei, Xiaoyong
AU - Gao, Feng
AU - Du, Hongliang
AU - Jin, Li
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/10/15
Y1 - 2022/10/15
N2 - Although relaxor ferroelectrics (RFEs) have received considerable attention in advanced pulsed power capacitor systems (APPCSs) due to their numerous advantages, it remains difficult to achieve comprehensive outstanding energy storage performance (ESP) owing to the trade-offs among recoverable energy density (Wrec), energy efficiency (η) and thermal stability. In this work, we proposed a collaborative optimization strategy for improving the ESP of (Ba0.8Sr0.2)TiO3 (BST)-based RFE ceramics, i.e., the introduction of Bi(Mg0.5Zr0.5)O3 (BMZ) and the use of viscous polymer process (VPP). The former obstructs the long-range ferroelectric order, induces high dynamic polar nanoregions and broadens temperature stabilized platform, thus alleviating the polarization hysteresis and increasing the energy efficiency. The latter progressively dilute pore concentration and thins the sample to ∼70 μm, which can greatly improve breakdown strength. As a result, exceptional ESP parameters are simultaneously achieved in 0.85BST-0.15BMZ ceramics by VPP (BMZ15VPP), which exhibit ultrahigh Wrec (10.3 J/cm3) and high η (88%) under 720 kV/cm while maintaining stable temperature stability. It is also noteworthy that a superior current density of 800 A/cm2 and a power density of 140 MW/cm3 are obtained. The overall excellent performance implies the competitiveness of BMZ15VPP in APPCSs and the feasibility of this strategy in designing compositive high ESP ceramic systems.
AB - Although relaxor ferroelectrics (RFEs) have received considerable attention in advanced pulsed power capacitor systems (APPCSs) due to their numerous advantages, it remains difficult to achieve comprehensive outstanding energy storage performance (ESP) owing to the trade-offs among recoverable energy density (Wrec), energy efficiency (η) and thermal stability. In this work, we proposed a collaborative optimization strategy for improving the ESP of (Ba0.8Sr0.2)TiO3 (BST)-based RFE ceramics, i.e., the introduction of Bi(Mg0.5Zr0.5)O3 (BMZ) and the use of viscous polymer process (VPP). The former obstructs the long-range ferroelectric order, induces high dynamic polar nanoregions and broadens temperature stabilized platform, thus alleviating the polarization hysteresis and increasing the energy efficiency. The latter progressively dilute pore concentration and thins the sample to ∼70 μm, which can greatly improve breakdown strength. As a result, exceptional ESP parameters are simultaneously achieved in 0.85BST-0.15BMZ ceramics by VPP (BMZ15VPP), which exhibit ultrahigh Wrec (10.3 J/cm3) and high η (88%) under 720 kV/cm while maintaining stable temperature stability. It is also noteworthy that a superior current density of 800 A/cm2 and a power density of 140 MW/cm3 are obtained. The overall excellent performance implies the competitiveness of BMZ15VPP in APPCSs and the feasibility of this strategy in designing compositive high ESP ceramic systems.
KW - BaTiO
KW - Dielectric capacitors
KW - Energy storage performance
KW - Spontaneous polarization vector calculation
UR - http://www.scopus.com/inward/record.url?scp=85131947762&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2022.137389
DO - 10.1016/j.cej.2022.137389
M3 - 文章
AN - SCOPUS:85131947762
SN - 1385-8947
VL - 446
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 137389
ER -