PMMA brush-modified graphene for flexible energy storage PVDF dielectric films

Wang, Zhen; Xue, Wenqing; Yang, Yongzhi; Li, Yuchao; Wang, Shuangshuang; Zhan, Yanhu; Li, Wei; Hao, Jigong; Zha, Jun‐Wei; Liu, Chen; Cao, Ye; Lu, Zhouguang

doi:10.1016/j.coco.2022.101411

Cited by 21 publications

(3 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Generally, conductive fillers are usually selected as core materials, while small molecular organics or perovskite ceramics are often selected as shell layer via in‐situ polymerization or chemical/physical absorption. For instance, Wang, et al 18 prepared core‐shelled rGO‐g‐PMMA structures, in which, the introduced PMMA brush significantly enhanced the dispersion of graphene in PVDF matrix and therefore limited the leakage current by the formation of insulating PMMA layer. The focuses of these studies were mostly put on enhancing the dispersion of filler materials in polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Three‐phase interfacial design in BaTiO₃/rGO/polyetherimide composite enabling enhanced dielectric, thermal and mechanical properties

Zhang,

Yuan,

Song

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

As core components in electric/electronic fields, dielectric materials have recently received ever‐increasing interests. Among them, polymer‐based dielectric composites have drawn ever‐increasing attentions due to their high‐temperature resistance and excellent processibility. However, state‐of‐art studies mostly focus on the modification of single‐phase filler, while the heterogeneous three phase interactions between fillers and polymer matrix are rarely studied. To fill this gap, in this study, a novel strategy of interfacial design and structural construction of three‐phase BaTiO3/rGO/polymer nanocomposites have been promoted to simultaneously build interfacial barriers between adjacent rGO nanosheets and to enhance the interfacial polarization of rGO nanosheets for improved dielectric, thermal and mechanical properties. The dielectric constant of 0.6 wt% BT/ARGO/PEI reached 644@1 kHz with a dielectric loss of only 0.218, while these values for 0.5 wt% ARGO/PEI composites are 471 and 0.489, respectively. Meanwhile, the breakdown strength almost doubled (from 48 kV·mm−1 to 87 kV·mm−1) upon the addition of BaTiO3 (BT) nanoparticles. Moreover, the introduced BT nanoparticles significantly enhanced the intermolecular frictions between different materials and contributed largely to promoted mechanical and thermal properties. We therefore speculate this work establishes a strong foundation for fabricating three heterogeneous‐phase high dielectric polymer materials with excellent dielectric, thermal and mechanical properties.Highlights Graphene oxide was modified by APTES and reduced by L‐Ascorbic Acid. Three‐phase BT/ARGO/PEI composites showed enhanced dielectric properties. The incorporated BT nanoparticles reduced the dielectric loss. The thermal and mechanical properties of BT/ARGO/PEI composites are optimized. Interfacial interactions between different phase of materials are studied.

show abstract

Section: Introductionmentioning

confidence: 99%

Three‐phase interfacial design in BaTiO₃/rGO/polyetherimide composite enabling enhanced dielectric, thermal and mechanical properties

Zhang,

Yuan,

Song

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

show abstract

“…High dielectric constant polymers play a crucial role in all aspects of our social lives, such as aerospace, electronics, and hybrid electric vehicles, because of their rapid charge and discharge rates, lightweight, and high-power density [1]. However, the dielectric constant of a single polymer is very low, which cannot meet the current needs of high-performance electronic components.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Calcium Copper Titanate/Epoxy-Boron Nitride Nanosheets Dielectrics toward High Dielectric Constant and Low Loss

Yang,

Xue,

et al. 2023

J. Phys.: Conf. Ser.

Self Cite

View full text Add to dashboard Cite

Epoxy dielectric materials with high permittivity and low loss were fabricated via inversely introducing epoxy-boron nitride nanosheets (EP-BNNS) mixtures into a continuous three-dimensional CaCu3Ti4O12 (3D CCTO) ceramic network constructed by template method. The obtained 3D CCTO/EP-1.0%BNNS composite exhibited an enhanced permittivity of 25.8 and suppressed low loss of 0.032 (@ 1 kHz), 170%, and 89% of conventional CCTO/EP system, respectively. In addition, the activation energy derived from the isothermal dielectric relaxation spectra increases with the addition of BNNS, indicating that the presence of BNNS restrains the dipolar polarization of EP composites.

show abstract

“…Polymer dielectric materials have gained significant attention in many fields, such as electronics, electrical engineering, aerospace, telecommunication, new energy vehicles and even military defences, due to their extremely large power density, lightweight, and flexibility. [1][2][3][4] However, the low dielectric constant and energy storage density of a neat polymer dramatically limit their vast industrial applications. Incorporating high permittivity ceramics into polymers, such as barium titanate (BT), [5,6] copper calcium titanate (CCTO), [7,8] and barium strontium titanate (BST) [9], is a common method for obtaining polymer composites with high dielectric constants and energy density.…”

Section: Introductionmentioning

confidence: 99%

Improved dielectric and energy storage properties of three‐dimensional BaTiO₃/polyvinyl alcohol‐boron nitride flexible dielectric composite via template infiltration strategy

Yang,

Chao,

Jiang

et al. 2023

IET Nanodielectrics

Self Cite

View full text Add to dashboard Cite

Continuous three‐dimensional BaTiO3 (3DBT) ceramic network was prepared by the sol‐gel method using cleanroom wipers as the template. Subsequently, flexible 3DBT/polyvinyl alcohol‐boron nitride nanosheets (PVA‐BNNS) composite dielectric films were facilely fabricated by inversely introducing different BNNS concentrations of PVA‐BNNS solution into the 3DBT network. The results demonstrated that PVA solution effectively embedded into the 3DBT framework through an inverse infiltration process, thereby endowing the material with excellent flexibility. The content of 3DBT in the saturated 3DBT/PVA‐BNNS composite was ∼27 wt% (6.9 vol%). In addition, the 3DBT/PVA‐1.0%BNNS system exhibited an excellent dielectric constant of 17.4 (at 1 kHz), a high breakdown strength of 114.5 kV·mm−1 and an energy density of 2.51 J·cm−3 (at 110 kV·mm−1), being 1.67, 1.58 and 7.17 times higher than those of traditional fabricated 27 wt% nano‐BT/PVA (at 70 kV·mm−1) composite, respectively. What's more, the obtained 3DBT/PVA‐BNNS dielectric film exhibited superior thermal and mechanical stability, indicating potential applications in harsh environments.

show abstract

PMMA brush-modified graphene for flexible energy storage PVDF dielectric films

Cited by 21 publications

References 33 publications

Three‐phase interfacial design in BaTiO₃/rGO/polyetherimide composite enabling enhanced dielectric, thermal and mechanical properties

Three‐phase interfacial design in BaTiO₃/rGO/polyetherimide composite enabling enhanced dielectric, thermal and mechanical properties

Three-Dimensional Calcium Copper Titanate/Epoxy-Boron Nitride Nanosheets Dielectrics toward High Dielectric Constant and Low Loss

Improved dielectric and energy storage properties of three‐dimensional BaTiO₃/polyvinyl alcohol‐boron nitride flexible dielectric composite via template infiltration strategy

Contact Info

Product

Resources

About

PMMA brush-modified graphene for flexible energy storage PVDF dielectric films

Cited by 21 publications

References 33 publications

Three‐phase interfacial design in BaTiO3/rGO/polyetherimide composite enabling enhanced dielectric, thermal and mechanical properties

Three‐phase interfacial design in BaTiO3/rGO/polyetherimide composite enabling enhanced dielectric, thermal and mechanical properties

Three-Dimensional Calcium Copper Titanate/Epoxy-Boron Nitride Nanosheets Dielectrics toward High Dielectric Constant and Low Loss

Improved dielectric and energy storage properties of three‐dimensional BaTiO3/polyvinyl alcohol‐boron nitride flexible dielectric composite via template infiltration strategy

Contact Info

Product

Resources

About

Three‐phase interfacial design in BaTiO₃/rGO/polyetherimide composite enabling enhanced dielectric, thermal and mechanical properties

Three‐phase interfacial design in BaTiO₃/rGO/polyetherimide composite enabling enhanced dielectric, thermal and mechanical properties

Improved dielectric and energy storage properties of three‐dimensional BaTiO₃/polyvinyl alcohol‐boron nitride flexible dielectric composite via template infiltration strategy