TY - JOUR
T1 - High energy storage performance in (Bi0.4Na0.2K0.2Ba0.2)TiO3-Bi(Zn2/3Ta1/3)O3 high-entropy ceramics with excellent temperature and frequency stability
AU - Liu, Chang
AU - Kong, Yuhao
AU - Zhang, Jianhong
AU - Lyu, Chongguang
AU - Ma, Huifang
N1 - Publisher Copyright:
© 2025 Elsevier Ltd and Techna Group S.r.l.
PY - 2025/5
Y1 - 2025/5
N2 - Dielectric capacitors with high power density, cost-effectiveness, and harsh environmental working abilities have gained considerable research attention. Dielectric materials are key components of dielectric capacitors and directly influence their operational performance. Among others, high-entropy perovskites are emerging as attractive candidates for energy storage materials owing to their exceptional performance driven by the high-entropy effect. Here, a high-entropy (1-x)(Bi0.4Na0.2K0.2Ba0.2)TiO3-xBi(Zn2/3Ta1/3)O3 system for energy storage devices was designed. A systematic study was conducted to investigate the ferroelectric and dielectric properties of BNKBT-BZT high-entropy ceramics (HECs). The resultant sample exhibits strong relaxor properties and exceptional energy storage properties, with a high recoverable energy storage density (Wrec) of 4.11 J/cm³ and an energy storage efficiency (η) of 84 % under an electric field of 260 kV/cm. More interestingly, the BNKBT-15BZT HECs also display outstanding thermal and frequency stability. These findings suggest that the resultant BNKBT-15BZT HECs are highly promising for applications in dielectric energy storage within low-to-moderate electric field ranges.
AB - Dielectric capacitors with high power density, cost-effectiveness, and harsh environmental working abilities have gained considerable research attention. Dielectric materials are key components of dielectric capacitors and directly influence their operational performance. Among others, high-entropy perovskites are emerging as attractive candidates for energy storage materials owing to their exceptional performance driven by the high-entropy effect. Here, a high-entropy (1-x)(Bi0.4Na0.2K0.2Ba0.2)TiO3-xBi(Zn2/3Ta1/3)O3 system for energy storage devices was designed. A systematic study was conducted to investigate the ferroelectric and dielectric properties of BNKBT-BZT high-entropy ceramics (HECs). The resultant sample exhibits strong relaxor properties and exceptional energy storage properties, with a high recoverable energy storage density (Wrec) of 4.11 J/cm³ and an energy storage efficiency (η) of 84 % under an electric field of 260 kV/cm. More interestingly, the BNKBT-15BZT HECs also display outstanding thermal and frequency stability. These findings suggest that the resultant BNKBT-15BZT HECs are highly promising for applications in dielectric energy storage within low-to-moderate electric field ranges.
KW - Bi(ZnTa)O
KW - Dielectric properties
KW - Energy storage density
KW - High-entropy ceramics
KW - Relaxor ferroelectrics
UR - http://www.scopus.com/inward/record.url?scp=85216882643&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2025.01.566
DO - 10.1016/j.ceramint.2025.01.566
M3 - 文章
AN - SCOPUS:85216882643
SN - 0272-8842
VL - 51
SP - 17928
EP - 17935
JO - Ceramics International
JF - Ceramics International
IS - 13
ER -