TY - JOUR
T1 - Interface-engineering-enhanced energy storage performance of (Na0.8K0.2)0.5Bi4.5Ti4O15/Bi4LaTi3.5Mg0.5O15 multilayer film capacitors
AU - Ge, Rui
AU - Yang, Jing
AU - Zeng, Shuang
AU - Zhang, Yuanyuan
AU - Bai, Wei
AU - Tang, Xiaodong
N1 - Publisher Copyright:
© 2024
PY - 2024/4
Y1 - 2024/4
N2 - Dielectric capacitors are vital components in advanced electrical power systems due to their high power density. However, how to improve their comparatively low energy density is still a major challenge. In this work, we designed a dielectric capacitor with a multilayer structure by inserting different numbers of ferroelectric (Na0.8K0.2)0.5Bi4.5Ti4O15 (NKBT) layers into relaxor ferroelectric Bi4LaTi3.5Mg0.5O15 (BLTM). Through the regulation of interface engineering, that is, the joint effects of electrical field amplifying, interlayer coupling, and block layer at the interface, enhancing the energy storage density and breakdown field in (NKBT/BLTM)N capacitors. A giant energy density (Wrec) of 81.2 J/cm3 and a high breakdown electric field of 4074 kV/cm are achieved in capacitors with N = 4. Consequently, interface engineering can be promoted as a universal route to optimize the energy storage performance of dielectric capacitors.
AB - Dielectric capacitors are vital components in advanced electrical power systems due to their high power density. However, how to improve their comparatively low energy density is still a major challenge. In this work, we designed a dielectric capacitor with a multilayer structure by inserting different numbers of ferroelectric (Na0.8K0.2)0.5Bi4.5Ti4O15 (NKBT) layers into relaxor ferroelectric Bi4LaTi3.5Mg0.5O15 (BLTM). Through the regulation of interface engineering, that is, the joint effects of electrical field amplifying, interlayer coupling, and block layer at the interface, enhancing the energy storage density and breakdown field in (NKBT/BLTM)N capacitors. A giant energy density (Wrec) of 81.2 J/cm3 and a high breakdown electric field of 4074 kV/cm are achieved in capacitors with N = 4. Consequently, interface engineering can be promoted as a universal route to optimize the energy storage performance of dielectric capacitors.
KW - Dielectric capacitors
KW - Energy density
KW - Interface engineering
KW - Lead-free
UR - https://www.scopus.com/pages/publications/85185832641
U2 - 10.1016/j.mseb.2024.117263
DO - 10.1016/j.mseb.2024.117263
M3 - 文章
AN - SCOPUS:85185832641
SN - 0921-5107
VL - 302
JO - Materials Science and Engineering: B
JF - Materials Science and Engineering: B
M1 - 117263
ER -