Synthesis and characterizations of SrTiO3 modified BNT-KNN ceramics for energy storage applications

Lead‐free (K,Na)NbO3‐based ceramics with high optical transparency and large energy storage ability

“…The largest W total , W rec ,and W loss were obtained at x = 0.06 and are 3.0, 1.5, and 1.5 J/cm 3 respectively. The values are superior to most KNN‐based ceramics that have been previously reported . As x increases, the change in the energy storage efficiency η is opposite of the change in W , as shown in Figure B.…”

“…The values are superior to most KNN-based ceramics that have been previously reported. 15,21,22,44 As x increases, the change in the energy storage efficiency g is opposite of the change in W, as shown in Figure 8B. The g of KNN-xSZN ceramics are 60, 52, 50, 63,72, 72% for x = 0.03, 0.05, 0.06, 0.07, 0.08 and 0.10, respectively, which will be further improved in future work.…”

“…However, almost all the KNN‐based ferroelectric ceramics examined in previous studies do not satisfy the requirement of both high optical transmittance and high energy storage density. Tables and show the visible optical transparency and energy storage density of most KNN‐based ceramics studied during the 2014‐2017 time period . It was found that transparent ferroelectric ceramics with high energy storage densities have rarely been created in previous studies.…”

“…Tables 1 and 2 show the visible optical transparency and energy storage density of most KNNbased ceramics studied during the 2014-2017 time period. [12][13][14][15][16][17][18][19][20][21][22] It was found that transparent ferroelectric ceramics with high energy storage densities have rarely been created in previous studies. To achieve a high optical transparency, a material needs to have high density, low porosity, no impurities, a small grain size, and a symmetrical crystal structure are needed to eliminate all possible light scattering.…”

Influence of Bi nonstoichiometry on the energy storage properties of 0.93KNN–0.07BixMN relaxor ferroelectrics

“…Recently, K 0:5 Na 0:5 NbO 3 -based relaxor ferroelectrics emerged as a very promising relaxor material system due to their excellent energy storage properties. [20][21][22][23][24][25][26][27][28][29] Shao et al studied that the W rec reached 4.08 J/cm 3 for 0.9(K 0:5 Na 0:5 )NbO 3 -0.1Bi(Mg 2=3 Nb 1=3 )O 3 ceramics, 23 the ceramics of 0.85(K 0:5 Na 0:5 )NbO 3 -0.15SrTiO 3 also exhibited a large W rec and the value is 4.03 J/cm 3 , which is identified by Yang et al 25 The comment essence of these reported KNN-based ceramics with high performances is the existence of a secondary compound, which helps reduce the grain size and increase the DBS for high recoverable energy storage density.…”