Excellent energy storage performance of multi-alternating-layer structured PMMA/PVDF dielectric composite at high-temperature

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer Pub Date : 2024-11-12 DOI:10.1016/j.polymer.2024.127772

Shaohua Wang , Yue Zhang , Guowei Hao , Yue Wang , Zheng Gong , Changhai Zhang , Yongquan Zhang , Tiandong Zhang , Qi Wang

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引用次数: 0

Abstract

Polymer dielectric capacitors have high power density and are an integral component of electronic and power device. Currently, the limited energy density restricts their further application. In this research, a novel method was designed to optimize performance of PMMA/PVDF composite via an alternating stacked multi-layer structure. And, the five-alternating-layer of PVDF-PMMA-PVDF-PMMA-PVDF (F-A-F-A-F) composite has excellent dielectric properties, for instance, a better dielectric constant (4.52@1 kHz) and a low dielectric loss (0.034@1 kHz). The discharge energy density (U_e) of it is significantly larger than that of PMMA and PVDF. Particularly, the U_e of F-A-F-A-F composite is increased by 83.0 % (from 4.71 J/cm³ to 8.62 J/cm³) with charging-discharging efficiency of 60 % at 80 °C. Moreover, the F-A-F-A-F composite achieves an excellent stability after 40,000 cycles. This composite has a wide range of potential applications in the field of traditional dielectric capacitor due to its good energy storage performance and cycle stability.

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多交替层结构 PMMA/PVDF 电介质复合材料在高温下的优异储能性能

聚合物电介质电容器具有很高的功率密度，是电子和电力设备不可或缺的组成部分。目前，有限的能量密度限制了它们的进一步应用。本研究设计了一种新方法，通过交替堆叠的多层结构来优化 PMMA/PVDF 复合材料的性能。PVDF-PMMA-PVDF-PMMA-PVDF（F-A-F-A-F）五层交替复合材料具有优异的介电性能，例如，介电常数较好（4.52@1 kHz），介电损耗较低（0.034@1 kHz）。其放电能量密度（Ue）明显高于 PMMA 和 PVDF。特别是，F-A-F-A-F 复合材料的放电能量密度提高了 83.0%（从 4.71 J/cm3 提高到 8.62 J/cm3），在 80 °C 下的充放电效率为 60%。此外，F-A-F-A-F 复合材料在 40,000 次循环后仍具有出色的稳定性。由于具有良好的储能性能和循环稳定性，这种复合材料在传统电介质电容器领域具有广泛的应用潜力。

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来源期刊

Polymer 化学-高分子科学

CiteScore

7.90

自引率

8.70%

发文量

959

审稿时长

32 days

期刊介绍： Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.