TY - JOUR
T1 - Achieving high energy storage properties in perovskite oxide via high-entropy design
AU - Ning, Yating
AU - Pu, Yongping
AU - Zhang, Qianwen
AU - Zhou, Shiyu
AU - Wu, Chunhui
AU - Zhang, Lei
AU - Shi, Yu
AU - Sun, Zixiong
N1 - Publisher Copyright:
© 2022 Elsevier Ltd and Techna Group S.r.l.
PY - 2023/4/15
Y1 - 2023/4/15
N2 - In recent years, “high-entropy” materials have attracted great attention in various fields due to their unique design concepts and crystal structures. The definition of high-entropy is also more diverse, gradually expanding from a single phase with an equal molar ratio to a multi-phase with a non-equimolar ratio. This study selected (Na0.2Bi0.2Ba0.2Sr0.2Ca0.2)TiO3 high entropy ceramics with excellent relaxation behavior. The A-site elements are divided into (x = Na, Bi, Ba) and ((1-3x)/2 = Sr, Ca) according to their inherent properties. A novel ABO3 structural energy storage ceramics (NaBaBi)x(SrCa)(1-3x)/2TiO3 (x = 0.19, 0.195, 0.2, 0.205 and 0.21) was successfully fabricated using the high entropy design concept. The ferroelectric and dielectric properties of non-equimolar ratio high-entropy ceramics were studied in detail. It was found that the dielectric constant of ∼4920 and the recoverable energy storage density of 3.86 J/cm3 (at 335 kV/cm) can be achieved simultaneously at x = 0.205. The results indicate that the design concept of high-entropy materials with a non-equal molar ratio is an effective means to achieve distinguished energy storage performance in lead-free ceramics.
AB - In recent years, “high-entropy” materials have attracted great attention in various fields due to their unique design concepts and crystal structures. The definition of high-entropy is also more diverse, gradually expanding from a single phase with an equal molar ratio to a multi-phase with a non-equimolar ratio. This study selected (Na0.2Bi0.2Ba0.2Sr0.2Ca0.2)TiO3 high entropy ceramics with excellent relaxation behavior. The A-site elements are divided into (x = Na, Bi, Ba) and ((1-3x)/2 = Sr, Ca) according to their inherent properties. A novel ABO3 structural energy storage ceramics (NaBaBi)x(SrCa)(1-3x)/2TiO3 (x = 0.19, 0.195, 0.2, 0.205 and 0.21) was successfully fabricated using the high entropy design concept. The ferroelectric and dielectric properties of non-equimolar ratio high-entropy ceramics were studied in detail. It was found that the dielectric constant of ∼4920 and the recoverable energy storage density of 3.86 J/cm3 (at 335 kV/cm) can be achieved simultaneously at x = 0.205. The results indicate that the design concept of high-entropy materials with a non-equal molar ratio is an effective means to achieve distinguished energy storage performance in lead-free ceramics.
KW - n/a OA procedure
KW - Energy storage performance
KW - High-entropy ceramics
KW - Relaxor ferroelectrics
KW - Component design
UR - http://www.scopus.com/inward/record.url?scp=85144928230&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2022.12.073
DO - 10.1016/j.ceramint.2022.12.073
M3 - Article
AN - SCOPUS:85144928230
SN - 0272-8842
VL - 49
SP - 12214
EP - 12223
JO - Ceramics international
JF - Ceramics international
IS - 8
ER -