Enhanced energy storage properties of 0.7Bi0·5Na0·5TiO3-0.3SrTiO3 ceramic through the addition of NaNbO3

Ultrafast charge‐discharge and enhanced energy storage properties of lead‐free K0.5Na0.5NbO3‐based ceramics

“…15,24,27,28 Accordingly, improving η while maintaining a high W rec is of great significance. 2,[29][30][31] Due to the large radii of Bi 3+ (1.36 Å) and the Ce 3+ /Ce 4+ (1.34 Å/1.14 Å), which are similar to the radii of (K 0.5 Na 0.5 ) + (1.20 Å), they will occupy the A sites of the ABO 3 perovskite structure. 32 The hybridization of O 2 2p orbital and Bi 3+ 6s orbital can improve the P max values and benefit the polarity of the A site of KNN ceramics because of the valence electron structure of 6s 2 6p • of Bi 3+ .…”

“…A large W rec facilitates the miniaturization and integration of energy storage devices, but the applications of energy storage are limited by a low η , a low η will also gradually raise the temperature of the devices when it is working, which might lead to the result that the device operate abnormally 15,24,27,28 . Accordingly, improving η while maintaining a high W rec is of great significance 2,29–31 . Due to the large radii of Bi 3+ (1.36 Å) and the Ce 3+ /Ce 4+ (1.34 Å/1.14 Å), which are similar to the radii of (K 0.5 Na 0.5 ) + (1.20 Å), they will occupy the A sites of the ABO 3 perovskite structure 32 .…”

Ultrahigh energy-storage density of a lead-free 0.85Bi0.5Na0.5TiO3–0.15Ca(Nb0.5Al0.5)O3 ceramic under low electric fields

“…[15][16][17][18] Moreover, it is a more popular strategy to design RFE materials with nano-sized domains as well as elongated P-E curves and large η by chemical doping. [19][20][21][22][23][24][25][26][27][28][29] Under an applied electric field, nanodomains are easier to reverse than microdomains, leading to the reduction of P r and the enhancement of η. 24 Much progress has been achieved in increasing energy storage properties at high electric fields by domain engineering and grain engineering.…”