Enhancing Comprehensive Performance via Capturing and Scattering the Carriers inside PESU-Based Nanocomposite Film Capacitors

• DOI: 10.1021/acsami.3c18733
• Publication Date: 2024-02-17T16:00:58Z
• Authors: Zhicheng Li; Yu Zhang; Zhongbin Pan; Xu Fan; Peng Li; Weidong Chen; Jinjun Liu; Weiping Li
• Keywords: HOMO/LUMO

Film capacitors have become key electronic components for electrical energy storage installations and high-power systems. Nonetheless, high-temperature high-electric-field environments would cause a surge of the loss, placing fundamental challenge film applied in harsh environments. Here, we constructed composite film, combining poly(ether sulfone) (PESU) with excellent thermal stability large-band-gap filler boron nitride nanosheets (BNNSs). The introduction BNNSs form deep/shallow traps inside dielectric polymer matrix, effectively affecting charge migration. Via density functional theory (DFT) calculation, higher highest occupied molecular orbital (HOMO) lowest unoccupied (LUMO) levels BNNS than matrix facilitate scattering electrons attracting holes. resultant obtains desired discharged densities (