TY - JOUR
T1 - Synthesis and electrochemical properties of high entropy titanate powders (La0.2X0.2Ba0.2Sr0.2Y0.2)TiO3 (X = Na or K, Y = Ca or Pb) with perovskite structure
AU - Yu, Pengfei
AU - Sun, Xing
AU - Li, Yuting
AU - Xu, Qingyang
AU - Sun, Guodong
AU - Jie, Wanqi
N1 - Publisher Copyright:
© 2024 Elsevier Ltd and Techna Group S.r.l.
PY - 2024/10/15
Y1 - 2024/10/15
N2 - In this paper, four new high entropy titanate powders (La0.2X0.2Ba0.2Sr0.2Y0.2)TiO3 (X = Na or K, Y = Ca or Pb) were successfully synthesized by a sol‒gel strategy. When the pH value of the sol ranged from 3 to 4, it was easier to obtain pure high entropy powders with a perovskite structure. When the calcination temperature was in the range of 700 °C–900 °C, the high entropy powders were more beneficial to form a single solid solution with high XRD diffraction intensity and crystal quality. The as-synthesized powders with uniform distribution of A-position elements had a particle size between 50–120 nm and good dispersibility. The cyclic voltammetry (CV) and galvanostatic charge discharge (GCD) tests showed that these powders had better electrochemical properties and energy storage potential. When the discharge current was 1 A/g, the specific capacitance was higher than 136 F/g, even if the current density was 10 A/g, the specific capacity remained about 60 % of the initial.
AB - In this paper, four new high entropy titanate powders (La0.2X0.2Ba0.2Sr0.2Y0.2)TiO3 (X = Na or K, Y = Ca or Pb) were successfully synthesized by a sol‒gel strategy. When the pH value of the sol ranged from 3 to 4, it was easier to obtain pure high entropy powders with a perovskite structure. When the calcination temperature was in the range of 700 °C–900 °C, the high entropy powders were more beneficial to form a single solid solution with high XRD diffraction intensity and crystal quality. The as-synthesized powders with uniform distribution of A-position elements had a particle size between 50–120 nm and good dispersibility. The cyclic voltammetry (CV) and galvanostatic charge discharge (GCD) tests showed that these powders had better electrochemical properties and energy storage potential. When the discharge current was 1 A/g, the specific capacitance was higher than 136 F/g, even if the current density was 10 A/g, the specific capacity remained about 60 % of the initial.
KW - Electrochemical properties
KW - High entropy titanate powders
KW - Perovskite structure
KW - Sol‒gel strategy
UR - http://www.scopus.com/inward/record.url?scp=85199103405&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2024.07.227
DO - 10.1016/j.ceramint.2024.07.227
M3 - 文章
AN - SCOPUS:85199103405
SN - 0272-8842
VL - 50
SP - 38801
EP - 38807
JO - Ceramics International
JF - Ceramics International
IS - 20
ER -