Giant energy density and high efficiency achieved in silver niobate-based lead-free antiferroelectric ceramic capacitors via domain engineering

NaNbO3‐(Bi0.5Li0.5)TiO3 Lead‐Free Relaxor Ferroelectric Capacitors with Superior Energy‐Storage Performances via Multiple Synergistic Design

“…a) Temperature dependence of bipolar P–E loops for the 0.68NN‐0.32BLT ceramic measured at the fixed electric field; b) W rec and η values as a function of temperature for the 0.68NN‐0.32BLT ceramic; c) a comparison of the temperature stability of W rec among various kinds of representative energy‐storage lead‐free ceramics (BKT: (Bi 0.5 K 0.5 )TiO 3 ). [ 15,20–22,26,27,56 ] …”

“…[ 5–10 ] As shown in Figure 1 a, ultrahigh W rec values have been achieved in NaNbO 3 (NN) and AgNbO 3 (AN)‐based lead‐free AFE ceramics through introducing relaxor behavior, yet the large polarization hysteresis from the inevitable field‐induced AFE‐FE phase transition leads to low η values. [ 7,11–16 ] Owing to the extremely low energy loss, lead‐free relaxor FE ceramics based on BaTiO 3 (BT), (Na 0.5 Bi 0.5 )TiO 3 (BNT), BiFeO 3 (BF), and (K 0.5 Na 0.5 )NbO 3 (KNN), etc., have been actively studied in the last few years. [ 3,8–10,17–29 ] Nevertheless, the obtained W rec values are generally lower than 5 J cm –3 together with η values >80%.…”

“…a,b) The comparison of energy‐storage properties between 0.68NN‐0.32BLT ceramics and other recently reported bulk ceramics. [ 2–5,7–29,31–33,56–62 ] The red star and the purple star represent the energy‐storage properties of 0.68NN‐0.32BLT and 0.68NN‐0.32BT ceramics, respectively. The P–E loops for c) pure NN and d) 0.68NN‐0.32BT/BLT ceramics measured under their E test‑max at 10 Hz; e) a comparison of E test‑max , P max , W rec , and η values between pure NN and 0.68NN‐0.32BT/BLT ceramics.…”

Achieving ultrahigh energy-storage capability in PbZrO3-based antiferroelectric capacitors based on optimization of property parameters

“…Furthermore, the phase-switching eld is an important parameter to evaluate the antiferroelectricity. 18,54 Fig. 3(g) shows the composition dependence E A , E F and hysteresis width DE (DE ¼ E A À E F ), which can be obtained from the I-E curves (Fig.…”

“…(c) A comparison of the temperature-dependent W rec between this work and other energy-storage ceramics. 18,19,29,37,49,50,54,57 (d) P-E loops of the PLSZT5 ceramic from 25 to 120 C at 420 kV cm; (e) corresponding W tot , W rec , W loss and h at various temperatures. (f) A comparison of the frequency-dependent W rec between this work and other energy-storage ceramics.…”