Ultrahigh energy storage density in lead-free relaxor antiferroelectric ceramics via domain engineering

Structural Phase Transition and In-Situ Energy Storage Pathway in Nonpolar Materials: A Review

“…Finally, two recent works reported that mesoscale-domain engineering may greatly improve the energy storage density, e.g., from 12.2 to 18.5 J/cm 3 in NaNbO 3 -based relaxor AFE ceramics [44,166]. Pertinent to the beneficial hierarchical domain structures, structure-property relationship study of FE Pb(Zr,Ti)O 3 shows that this may arise from phase transition frustration near a tricritical point [167].…”

Energy storage performance of BiFeO3–SrTiO3–BaTiO3 relaxor ferroelectric ceramics

“…Figure 6 exhibits the comparison of W rec and η values between x = 0.12 in this work and some recently reported typical lead‐free dielectric ceramics, including Bi 0.5 Na 0.5 TiO 3 (BNT)‐, BaTiO 3 (BT)‐, BiFeO 3 (BF)‐, and K 0.5 Na 0.5 NbO 3 (KNN)‐based ceramics 12,13,18,23–37 . As can be seen, excellent energy storage properties have been achieved in many works, but the simultaneous enhancement of W rec (> 5 J/cm 3 ) and η (> 80%) is still a challenge.…”

“…The impedance spectra of (0.55− x )BFO−0.45STO− x BTO ceramics measured at 340°C is displayed in Figure 2a. All graphs exhibit semicircular‐like arc, suggesting the contribution from grain boundary is dominated for the conduction process 1,18 . Furthermore, the total resistivity extracted from impedance spectra increases obviously by doping BTO (inset in Figure 2a), which can be attributed to the sintering aid of MnO 2 and decreased content of BFO 7,9 .…”

“…All graphs exhibit semicircular-like arc, suggesting the contribution from grain boundary is dominated for the conduction process. 1,18 Furthermore, the total resistivity extracted from impedance spectra increases obviously by doping BTO (inset in Figure 2a), which can be attributed to the sintering aid of MnO 2 and decreased content of BFO. 7,9 Because the decrement of BFO content helps to strengthen the role of MnO 2 , leading to increased resistivity.…”

“…Figure 6 exhibits the comparison of W rec and η values between x = 0.12 in this work and some recently reported typical lead-free dielectric ceramics, including Bi 0.5 Na 0.5 TiO 3 (BNT)-, BaTiO 3 (BT)-, BiFeO 3 (BF)-, and K 0.5 Na 0.5 NbO 3 (KNN)-based ceramics. 12,13,18,[23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] As can be seen, excellent energy storage properties have been achieved in many works, but the simultaneous enhancement of W rec (> 5 J/cm 3 ) and η (> 80%) is still a challenge. Fortunately, the x = 0.12 ceramic explored in this work exhibits more superior comprehensive energy storage properties than most of lead-free bulk ceramics.…”