TY - JOUR
T1 - Significantly enhanced energy storage properties in sandwich-structured polymer composites with self-assembled boron nitride layers
AU - Chen, Chao
AU - Xie, Yunchuan
AU - Zhang, Meirong
AU - Li, Jing
AU - Wei, Xiaoyong
AU - Zhang, Zhicheng
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/10/1
Y1 - 2022/10/1
N2 - Electrostatic capacitors have attracted tremendous attention in modern electron systems. Herein, we report a new design of sandwich-structured composite boron nitride-poly(vinylidene fluoride-co-hexafluoropropylene)/barium titanate-boron nitride (BN-P(VDF-HFP)/BT-BN) via interfacial self-assembly combined with the solution casting method. In this composite, the outer layers are the self-assembled BN films with high insulation to provide high breakdown strength (Eb) and resist the charge injection, whereas the middle layer contains the high permittivity (εr) BaTiO3 nanoparticles to provide high electrical polarization. Experimental results show that the Eb and discharged energy density (Ue) of BN-P(VDF-HFP)/BT-BN composites can be significantly improved with BN layer. The sandwich-structured composites of BN-3-BN show a high Ue of 19.4 J/cm3 at 550 MV/m, which is much greater than the corresponding single-layer composite. Further, the finite element results indicate that the designed sandwich-structure was contributing to improved Eb and Ue. Therefore, this study provides a novel strategy to enhance energy density in dielectric materials, which has great potential in high-performance electrostatic capacitor.
AB - Electrostatic capacitors have attracted tremendous attention in modern electron systems. Herein, we report a new design of sandwich-structured composite boron nitride-poly(vinylidene fluoride-co-hexafluoropropylene)/barium titanate-boron nitride (BN-P(VDF-HFP)/BT-BN) via interfacial self-assembly combined with the solution casting method. In this composite, the outer layers are the self-assembled BN films with high insulation to provide high breakdown strength (Eb) and resist the charge injection, whereas the middle layer contains the high permittivity (εr) BaTiO3 nanoparticles to provide high electrical polarization. Experimental results show that the Eb and discharged energy density (Ue) of BN-P(VDF-HFP)/BT-BN composites can be significantly improved with BN layer. The sandwich-structured composites of BN-3-BN show a high Ue of 19.4 J/cm3 at 550 MV/m, which is much greater than the corresponding single-layer composite. Further, the finite element results indicate that the designed sandwich-structure was contributing to improved Eb and Ue. Therefore, this study provides a novel strategy to enhance energy density in dielectric materials, which has great potential in high-performance electrostatic capacitor.
KW - Boron nitride film
KW - Breakdown strength
KW - Interfacial self-assembly
KW - Sandwich-structured composites
UR - https://www.scopus.com/pages/publications/85131462156
U2 - 10.1016/j.apsusc.2022.153673
DO - 10.1016/j.apsusc.2022.153673
M3 - 文章
AN - SCOPUS:85131462156
SN - 0169-4332
VL - 598
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 153673
ER -