Novel BCZT-based ceramics with ultrahigh energy storage efficiency and outstanding high temperature fatigue endurance and stability for practical application

Achieving high overall energy storage performance of KNN-based transparent ceramics by ingenious multiscale designing

“…2(d). 16,28–56 It can be seen that our ceramics have apparent advantages in energy storage capacity among both systems.…”

Effective regulation of breakdown strength through the synergistic effect of defect chemistry and energy band engineering in Ba0.85Ca0.15Zr0.1Ti0.9O3-based lead-free ceramics

“…The average E b value displays a maximum value of ∼574.3 kV cm −1 and ∼681.7 kV cm −1 for B 2/3 MT8 and B 2/3 ZT8 ceramics, which are higher than that of BMT8 (∼435.2 kV cm −1 ), BZT8 (∼620.2 kV cm −1 ) and most of the BT-, Sr 0.7 Bi 0.2 TiO 3 - (SBT), NN-, and BNT-based ceramics reported in the literature. 3,5,7,9,10–13,15,25,26,29–32,38,39,50–57 The improved E b induced by Bi 2/3 (M 1/3 Ta 2/3 )O 3 doping can be attributed to several aspects: (i) defect chemistry engineering increases the insulation resistivity of ceramics, which inhibits the transportation of conductive carriers (oxygen vacancies); (ii) the wider band gap of Ta 2 O 5 (∼4 eV) can enlarge the energy gap and effectively decrease the leakage current and energy loss at a high electric field, leading to improved intrinsic breakdown strength; 3,17 and (iii) the high quality ceramics feature relatively small grain size and high density (>95%), favorable for dielectric breakdown behavior as a result of the high resistivity of grain boundaries. 7,31,51…”

“…Herein, we have selected Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 O 3 (BCZT) as a host matrix and prepared novel lead-free RFE ceramics using the “relaxor end-member” of an A-site deficient Bi 2/3 (M 1/3 Ta 2/3 )O 3 (M = Mg and Zn) perovskite. 6,19,26 The addition of Bi 2/3 (M 1/3 Ta 2/3 )O 3 will induce an RFE state in BCZT, which can be achieved by disturbing the long-range order in A–O coupling. 13 Meanwhile, A-site substitution by Bi 3+ could cause crystal lattice distortion and a high polarization, which is helpful to enhance P m .…”

A polarization double-enhancement strategy to achieve super low energy consumption with ultra-high energy storage capacity in BCZT-based relaxor ferroelectrics

“…2(e). 34–49 The X -axis of such a diagram is W rec , while the Y -axis is the ratio of W rec and the E b (in short the W / E ratio), which defines the energy that can be stored in unit volume by triggering a unit electric field. Using this new figure-of-merit characterizes our ceramics’ energy consumption; consuming lower voltage to obtain higher energy storage capacity is also essential for dielectric capacitors.…”