Improved Dielectric Permittivity and Energy Density of Layered Polymer Composites through the Incorporation of Ultralow Amounts of RGO@BTO Hybrid Nanosheets,ACS Applied Electronic Materials

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Improved Dielectric Permittivity and Energy Density of Layered Polymer Composites through the Incorporation of Ultralow Amounts of RGO@BTO Hybrid Nanosheets
ACS Applied Electronic Materials ( IF 4.3 ) Pub Date : 2022-07-21 , DOI: 10.1021/acsaelm.2c00636
Shuimiao Xia ₁ , Kuan Chen ₂ , Kelan Yan ₂ , Liming Shen ₂ , Meiyu Zhang ₁ , Zhicheng Shi ₁ , Runhua Fan ₃

Affiliation

Polymer dielectric composites are extensively used in modern electronic devices because of their extremely high power density. However, unfavorable coupling between breakdown strength and dielectric permittivity can make achieving high energy density a challenge. In this study, reduced graphene oxide @ barium titanate (RGO@BTO) hybrid nanosheets have been fabricated and utilized as fillers in the design of RGO@BTO/P(VDF-HFP) single-layer films. An increase in permittivity to 24.8@10 kHz, i.e., equivalent to 253% of the P(VDF-HFP) (∼9.8@10 kHz) matrix, has been achieved with only 1 wt % RGO@BTO nanofillers due to the formation of microcapacitors. Furthermore, the RGO@BTO/P(VDF-HFP) film is hot-pressed with a PEI film and a P(VDF-HFP) film, forming a trilayer structure. Consequently, this trilayer film displays a high breakdown strength of 478 kV/mm, a high energy density of 8.25 J/cm³, and a satisfactory efficiency of 64.3%. Thus, this study provides an efficient route for designing polymer composites that combine high energy density with high permittivity.

中文翻译：

通过掺入超低量的 RGO@BTO 杂化纳米片提高层状聚合物复合材料的介电常数和能量密度

聚合物介电复合材料因其极高的功率密度而广泛用于现代电子设备中。然而，击穿强度和介电常数之间的不利耦合可能使实现高能量密度成为一项挑战。在这项研究中，还原氧化石墨烯@钛酸钡 (RGO@BTO) 杂化纳米片已被制造并用作 RGO@BTO/P(VDF-HFP) 单层薄膜设计中的填料。介电常数增加到 24.8@10 kHz，即.，相当于 P(VDF-HFP) (~9.8@10 kHz) 基质的 253%，由于微电容器的形成，仅使用 1 wt% RGO@BTO 纳米填料即可实现。此外，RGO@BTO/P(VDF-HFP)薄膜与PEI薄膜和P(VDF-HFP)薄膜热压，形成三层结构。因此，该三层薄膜表现出478 kV/mm的高击穿强度、8.25 J/cm ³的高能量密度和64.3%的令人满意的效率。因此，本研究为设计结合高能量密度和高介电常数的聚合物复合材料提供了一条有效途径。

更新日期：2022-07-21

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