High energy storage density over a broad temperature range in sodium bismuth titanate-based lead-free ceramics

Abstract

A series of (1-x)Bi0.48La0.02Na0.48Li0.02Ti0.98Zr0.02O3-xNa0.73Bi0.09NbO3 ((1-x)LLBNTZ-xNBN) (x = 0-0.14) ceramics were designed and fabricated using the conventional solid-state sintering method. The phase structure, microstructure, dielectric, ferroelectric and energy storage properties of the ceramics were systematically investigated. The results indicate that the addition of Na0.73Bi0.09NbO3 (NBN) could decrease the remnant polarization (P r) and improve the temperature stability of dielectric constant obviously. The working temperature range satisfying TCC 150 °C ≤±15% of this work spans over 400 °C with the compositions of x ≥ 0.06. The maximum energy storage density can be obtained for the sample with x = 0.10 at room temperature, with an energy storage density of 2.04 J/cm3 at 178 kV/cm. In addition, the (1-x)LLBNTZ-xNBN ceramics exhibit excellent energy storage properties over a wide temperature range from room temperature to 90 °C. The values of energy storage density and energy storage efficiency is 0.91 J/cm3 and 79.51%, respectively, for the 0.90LLBNTZ-0.10NBN ceramic at the condition of 100 kV/cm and 90 °C. It can be concluded that the (1-x)LLBNTZ-xNBN ceramics are promising lead-free candidate materials for energy storage devices over a broad temperature range.

BaTiO3–Bi(Li0.5Ta0.5)O3, Lead-Free Ceramics, and Multilayers with High Energy Storage Density and Efficiency

“…BT-BY (BaTiO3-BiYO3) 37 ; BLNLTZ-NBN (Na0.73Bi0.09NbO3-Bi0.48La0.02Na0.48Li0.02Ti0.98Zr0.02O3) 42 ; BT-NBT-NBN (BaTiO3-Bi0.5Na0.5TiO3-Na0.73Bi0.09NbO3) 35 ; NBBT-BMT ((Na0.5Bi0.5)0.92Ba0.08TiO3-Bi(Mg0.5Ti0.5)O3) 34 ; NBT-KN (Na0.5Bi0.5TiO3-KNbO3) 46 ; NBBT-KN (Na0.47Bi0.47Ba0.06TiO3-KNbO3) 46 ; NBT-BT-SZ-NN (Bi0.5Na0.5TiO3-BaTiO3-SrZrO3-NaNbO3) 36 ; NBABT (Na0.42Bi0.44Al0.06Ba0.08TiO3) 38 ; AN (AgNbO3) 50 . Red and blue bars correspond to energy density and electric field.…”

Composition-dependent xBa(Zr0.2Ti0.8)O3-(1-x)(Ba0.7Ca0.3)TiO3 bulk ceramics for high energy storage applications

“…The BZT-BCT ceramics are further investigated for applications of energy density capacitors [12]. The recoverable energy density was found to be 1.41 J/cm 3 and 0.71 J/cm 3 in BCT and BZT ceramics respectively at 150 kV/cm and 0.94 J/cm 3 in 0.85BZT-0.15BCT at 170 kV/cm [12][13] exhibited an energy storage density of 2.04 J/cm 3 at 178 kV/cm [14].…”

“…Most of the investigations for energy density applications have been performed in high electric field region [13][14][15][16][17]. However, the requirement of very high electric field to obtain the high energy density raises several safety concerns.…”

Simultaneously high-energy storage density and responsivity in quasi-hysteresis-free Mn-doped Bi0.5Na0.5TiO3-BaTiO3-(Sr0.7Bi0.2□0.1)TiO3 ergodic relaxor ceramics

“…For example, significant results have been obtained in (1−x)Bi 0.48 La 0.02 Na 0.48 Li 0.02 Ti 0.98 Zr 0.02 O 3−x Na 0.73 Bi 0.09 NbO 3 ceramics reported by Yang et al The maximum energy storage density can be obtained for the sample with x = 0.10 at room temperature (RT), with an energy storage density of 2.04 J/cm 3 at 178 kV/cm, the performance of which is outstanding in lead-free ceramics. However, the energy storage efficiency is only around 55% [13]. Balancing of energy storage density and efficiency in the BNT-material has been a difficult problem.…”