Ultrahigh Energy Storage Properties in (Sr0.7Bi0.2)TiO3-Bi(Mg0.5Zr0.5)O3 Lead-Free Ceramics and Potential for High-Temperature Capacitors

Abstract

Due to the enhanced demand for numerous electrical energy storage applications, including applications at elevated temperatures, dielectric capacitors with optimized energy storage properties have attracted extensive attention. In this study, a series of lead-free strontium bismuth titanate based relaxor ferroelectric ceramics have been successfully synthesized by high temperature solid-state reaction. The ultrahigh recoverable energy storage density of 4.2 J/cm3 under 380 kV/cm, with the high efficiency of 88%, was obtained in the sample with x = 0.06. Of particular importance is that this ceramic composition exhibits excellent energy storage performance over a wide work temperature up to 150 °C, with strong fatigue endurance and fast discharge speed. All these merits demonstrate the studied ceramic system is a potential candidate for high-temperature capacitors as energy storage devices.

Outstanding Energy Storage Performance in High‐Hardness (Bi0.5K0.5)TiO3‐Based Lead‐Free Relaxors via Multi‐Scale Synergistic Design

“…c) A comparison of energy‐storage performances in wide operating temperature range between 0.6BKT‐0.3BT‐0.1NN ceramic and other reported ceramics. [ 5,20,29,44,58–60 ] d) P–E loops and e) W rec and η as a function of frequency for 0.6BKT‐0.3BT‐0.1NN ceramics under 32 kV mm −1 .…”

Enhanced Energy‐Storage Properties and Good Temperature Stability in 0.92(Sr0.7Bi0.2)TiO3–0.08Bi(Mg0.5Hf0.5)O3 Relaxor Ferroelectric Ceramic

“…W rec and E b values of SBT–8BMH ceramic are considerably higher than those of other reported lead‐free energy‐storage ceramics, as shown in Table 1 . [ 17,20,24–32 ]…”

Giant Field‐Induced Strain with Low Hysteresis and Boosted Energy Storage Performance under Low Electric Field in (Bi0.5Na0.5)TiO3‐Based Grain Orientation‐Controlled Ceramics

“…c) Comparison of discharge time of textured ceramics with other lead-based and lead-free ceramics. [5,73,[75][76][77][78][81][82][83][84][85][86][87][88][89][90][91][92][93] inset of Figure 6b. Notably, the textured ceramics behave not only enhanced W d but also the short τ 0.9 at a value of less than 0.1 µs, which is faster than that of random case (≈0.27 µs).…”

“…c) Comparison of discharge time of textured ceramics with other lead‐based and lead‐free ceramics. [ 5,73,75–78,81–93 ] d) Time dependence of W d as a function of temperature; the lower inset shows the temperature dependence of τ 0.9 .…”