Atomic layer deposition coated polymer films with enhanced high-temperature dielectric strength suitable for film capacitors

Wu, Xudong; Liu, Yichen; Lin, Xiaotian; Huang, Enling; Song, Guanghui; Tan, Daniel Q.

doi:10.1016/j.surfin.2021.101686

Cited by 14 publications

(10 citation statements)

References 24 publications

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“…† The precursors are introduced to the vacuum chamber by argon gas alternately, and each pulsing of the precursor creates an atomic layer on the substrate. 13,27 BaTiO 3 nanoparticles are the core, and the shell thickness increases with the deposition cycles. The shell uniformity and thickness are determined by the chamber temperature, pulsing time, and cycle number.…”

Section: Characterization Of Core-shell Morphology and Crystalline St...mentioning

confidence: 99%

“…Therefore, the composite lms demonstrate the advantage of higher energy density and safer operation because of the enhanced breakdown strength. 27,56 However, the ALD coated Al 2 O 3 , and TiO 2 shells exhibit an unequal performance from the same fatigue tests. Their results of the corresponding composites lms are shown in Fig.…”

Section: Assessment Of Energy Storage Performance and Electrical Endu...mentioning

confidence: 99%

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Atomic layer deposition fabricated core–shell nanostructures for enhanced polyetherimide composite dielectrics

Song

Zhang³

et al. 2022

J. Mater. Chem. A

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Section: Characterization Of Core-shell Morphology and Crystalline St...mentioning

confidence: 99%

Section: Assessment Of Energy Storage Performance and Electrical Endu...mentioning

confidence: 99%

Atomic layer deposition fabricated core–shell nanostructures for enhanced polyetherimide composite dielectrics

Song

Zhang³

et al. 2022

J. Mater. Chem. A

Self Cite

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“…Film capacitors (FCs) are widely used for DC‐link applications in power electronic converters, which are applied for aerospace, automobile, power transmission and oil and gas exploration [1]. In the recent years, an increasing application of FCs is in hybrid electric vehicles, where the inverters are used to convert the direct current (DC) power of the battery to the alternating current (AC) power to drive the traction motor.…”

Section: Introductionmentioning

confidence: 99%

Reliability criterion of film capacitor based on moisture diffusion in encapsulation

Qiu

et al. 2023

High Voltage

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The current reliability criterion (RC) of the film capacitor (FC) is usually a fixed value, which does not consider the staged capacitance loss caused by moisture diffusion under high temperature and/or high humidity. The expected lifetime of capacitors would deviate far from the actual one. The moisture diffusion process of the encapsulated FC is analysed based on Fick's second law. In order to investigate the capacitance loss and moisture diffusion characteristics, 4 types of film capacitors are stressed with AC voltage under different temperatures and humidities. Based on the staged analysis of the capacitance and weight gain curves, the effect of moisture diffusion on capacitance loss is revealed. Results indicate that the linear stage of capacitance loss corresponds to the Fickian moisture diffusion stage of weight gain. The effect of voltage on FC aging is the most significant. The capacitance loss rate increases by 301% when the voltage rises by 30%. An RC calculation method of the FC is further proposed, which could also screen the encapsulation quality and shorten the aging test duration by at least 80%.

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“…[3,4] Taking electric vehicle power inverter as an example, the capacitors would occupy ≈40% of the device volume and ≈23% of its weight. [5] Furthermore, in practical scenarios, high energy storage efficiency (𝜂) is crucial to minimize energy loss through heat dissipation and prevent thermal breakdown, ensuring reliable capacitor operation. Therefore, there is a pressing need to concurrently achieve high energy density and efficiency in dielectric capacitors, addressing the demands for device miniaturization, energy efficiency, and system reliability.…”

Section: Introductionmentioning

confidence: 99%

Superior Energy Storage Performance in Antiferroelectric Epitaxial Thin Films via Structural Heterogeneity and Orientation Control

Zhang,

Si,

Deng

et al. 2023

Adv Funct Materials

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Dielectric capacitors are desired for electronics and electrical power systems because of their fast charge–discharge speed and high‐power density. Nevertheless, dielectric capacitors typically exhibit lower energy densities in comparison to other energy storage systems like batteries or fuel cells. Among dielectrics, antiferroelectrics have shown great promise for high energy density because of their characteristic double hysteresis loops. However, current antiferroelectric capacitors still face challenges of low efficiency and low breakdown strength due to their large hysteresis, which is harmful to energy efficiency and reliability of the system. Herein, by engineering the nanoscale heterogeneity to mitigate hysteresis and controlling orientation to enhance the polarization, the exceptional energy storage performance of antiferroelectric (Pb0.97La0.02)(Zr0.55Sn0.45)O3 epitaxial thin films is demonstrated. Atomic‐resolution transmission electron microscopy and X‐ray reciprocal space mapping confirm the presence of nanoscale structural heterogeneity, characterized by fragmented antipolar nanodomains. These films exhibit remarkable energy densities, reaching up to ≈84.5 J cm−3, coupled with ultrahigh efficiencies of up to ≈98.5% and superior stability, maintaining efficiencies above 92% across a wide field range of ≈5 MV cm−1. Notably, these findings surpass the capabilities of previously reported dielectric materials, opening new avenues for advanced energy storage applications.

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Atomic layer deposition coated polymer films with enhanced high-temperature dielectric strength suitable for film capacitors

Cited by 14 publications

References 24 publications

Atomic layer deposition fabricated core–shell nanostructures for enhanced polyetherimide composite dielectrics

Atomic layer deposition fabricated core–shell nanostructures for enhanced polyetherimide composite dielectrics

Reliability criterion of film capacitor based on moisture diffusion in encapsulation

Superior Energy Storage Performance in Antiferroelectric Epitaxial Thin Films via Structural Heterogeneity and Orientation Control

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