Energy Storage Properties of Mn and Y Codoped Ba_0.67Sr_0.33TiO₃ Ceramics

Abstract

Ba 0.67-x Y x Sr 0.33 Ti 0.995 Mn 0.005 O 3 (BSTM-xY, x ¼ 0, 0.003, 0.006, and 0.012) ceramics are synthesized by citrate sol-gel methods and the effect of Y contents on the energy storage properties of BSTM-xY ceramics is investigated. Dense microstructures with fine grain are observed as Mn and Y codoping. The introduction of Y enhances the dielectric properties and leakage current density of BSTM-xY ceramics. Mn and Y codoped BST ceramics show enhanced energy storage properties due to the improved microstructure and "slimmer" hysteresis loops with high polarization. The energy efficiency presents good thermal stability and electric field stability as Y doping. The energy density of BSTM-0.012Y ceramic is about 4 times larger than BSTM ceramic. The energy efficiency of BSTM-0.012Y ceramic maintains at about 91% at the field range of 30-150 kV cm À1 and at the temperature range of 20-50 C.

Improvement of Energy Storage Properties of NaNbO3-Based Ceramics through a Relaxation Strategy

“…In contrast, W rec showed a trend of first increasing and then decreasing, and the change rule of W rec was corresponding to the change of P max -P r value, when x = 0.2, the maximum value W rec = 1.607 J cm −3 is obtained at 100 kV cm −1 , which is in line with the interpretation of the microstructure in the SEM, which proves that the grain size has a certain influence on the energy storage properties. 32 The test results show that the addition of BNBST enables the effective improvement of the W rec and η of NN-based ceramics, when the content was increased from x = 0 to x = 0.2, the W rec and η were increased from 0.193 J cm −3 and 30% to 1.607 J cm −3 and 73%.…”

“…The finer grain size may be beneficial to improve the energy storage properties of NN-based ceramics. 32 Figures 5a-5g displays dielectric constant (ε r ) and dielectric loss (tanδ) of (1−x)NN-xBNBST (x = 0, 0.1, 0.15, 0.2, 0.25 and 0.30) ceramics as a function of temperature at different frequencies (1 kHz-1 MHz). The dielectric peaks of x = 0.1 and x = 0.15 around 200 °C and 125 °C are similar to those of x = 0 around 380 °C, relating to the temperature phase transition of NN-based ceramics from the AFE P phase to AFE R phase (T P-R ).…”

Achieving Enhanced Energy‐Storage Performances in Bi0.5(K0.15Na0.85)0.5TiO3 Ceramics Modified by Sr(Ti0.85Zr0.15)O3

“…Usually, energy storage properties can be improved by using ions doping, [1][2][3][4][5] and the large breakdown strength can be realized using an improved preparation method. [6,7] An effective strategy to decrease P r and realize slimmer hysteresis loops is to introduce cation to form relaxor ferroelectric. Dielectric materials such as BaTiO 3 -based materials and (Bi 0.5 Na 0.5 )TiO 3 -based materials with large P max have been developed for energy storage.…”

Electrocaloric Effect in Sn‐ and Y‐Codoped BaTiO3 Ceramics

“…[ 5–7 ] Lead‐free BaTiO 3 ‐based materials (BT) have attracted great research interest due to their superior ferroelectric and ECE performances. [ 8–12 ] Large electrocaloric (EC) temperature change Δ T = 2.63 K was induced under high electric field in Mn‐ and Y‐codoped BST ceramic. [ 3 ] Sn‐doped BaTiO 3 ceramics show an enhanced ECE (Δ T = 0.61 K) at 20 kV cm −1 .…”

“…[ 14–16 ] Sn‐doped (Na 0.5 Bi 0.5 )TiO 3 –BaTiO 3 presents tetragonal‐to‐cubic phase transition. [ 17 ] It was reported that Y doping lead to improved microstructure [ 10,18,19 ] and high polarization, [ 10,18 ] which are beneficial to the enhancement of ECE.…”