TY - JOUR
T1 - Bilayer-structured polymer nanocomposites exhibiting high breakdown strength and energy density via interfacial barrier design
AU - Li, He
AU - Yao, Bin
AU - Zhou, Yao
AU - Xu, Wenhan
AU - Ren, Lulu
AU - Ai, Ding
AU - Wang, Qing
N1 - Funding Information:
The authors acknowledge the support from the US Office of Naval Research.
Publisher Copyright:
© 2020 American Chemical Society
PY - 2020/8/24
Y1 - 2020/8/24
N2 - The development of advanced dielectric materials with high breakdown strength, high dischargeable energy densities, and great efficiencies is imperative to meet the ever-increasing demand of modern power systems and electronic devices. Herein, we present the layer-by-layer solution prepared bilayer-structured nanocomposite films with much enhanced capacitive performance via resolving the typical paradox between dielectric constant and breakdown strength in dielectric materials. The bilayered nanocomposite films are composed of Al2O3 dispersed in polystyrene as the interfacial barrier layer to inhibit electrical conduction and the polystyrene layer with TiO2 to enhance dielectric constant. The resulting layered film exhibits a discharged energy density of 4.43 J/cm3 along with ultrahigh charge−discharge efficiencies of >90%, which is among the highest energy densities ever achieved in the polystyrene-based dielectric polymer nanocomposites. In addition, the composite films show outstanding cyclic stability under high electric fields, which would enable the long-term efficient operation of film capacitors. This contribution represents an efficient route to high-energy-density dielectric composite materials by using interfacial barrier architectures.
AB - The development of advanced dielectric materials with high breakdown strength, high dischargeable energy densities, and great efficiencies is imperative to meet the ever-increasing demand of modern power systems and electronic devices. Herein, we present the layer-by-layer solution prepared bilayer-structured nanocomposite films with much enhanced capacitive performance via resolving the typical paradox between dielectric constant and breakdown strength in dielectric materials. The bilayered nanocomposite films are composed of Al2O3 dispersed in polystyrene as the interfacial barrier layer to inhibit electrical conduction and the polystyrene layer with TiO2 to enhance dielectric constant. The resulting layered film exhibits a discharged energy density of 4.43 J/cm3 along with ultrahigh charge−discharge efficiencies of >90%, which is among the highest energy densities ever achieved in the polystyrene-based dielectric polymer nanocomposites. In addition, the composite films show outstanding cyclic stability under high electric fields, which would enable the long-term efficient operation of film capacitors. This contribution represents an efficient route to high-energy-density dielectric composite materials by using interfacial barrier architectures.
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U2 - 10.1021/acsaem.0c01508
DO - 10.1021/acsaem.0c01508
M3 - Article
AN - SCOPUS:85094315100
SN - 2574-0962
VL - 3
SP - 8055
EP - 8063
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 8
ER -