Dielectric properties and energy storage performance of PVDF-based composites with MoS2@MXene nanofiller

Wang, Hou-Qing; Wang, Jingwen; Wang, Xinzhu; Gao, Xinhua; Zhuang, Guo‐Chao; Yang, Jian-Bao; Ren, Hua

doi:10.1016/j.cej.2022.135431

Cited by 62 publications

(31 citation statements)

References 70 publications

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“…This is a very interesting result in the contest of energy storage performance. Commonly, when a higher amount of filler is incorporated into PVDF film, the BDS of the resulting composite system decreases [ 53 , 54 , 55 ]. At an optimized filler concentration, especially for 2D fillers like Boron Nitride Nanosheets (BNNS) and MoS 2 , the BDS has been found to be improved in some previous reports [ 54 , 55 ].…”

Section: Resultsmentioning

confidence: 99%

“…Commonly, when a higher amount of filler is incorporated into PVDF film, the BDS of the resulting composite system decreases [ 53 , 54 , 55 ]. At an optimized filler concentration, especially for 2D fillers like Boron Nitride Nanosheets (BNNS) and MoS 2 , the BDS has been found to be improved in some previous reports [ 54 , 55 ]. Here in the present work, also, small loading (0.5 wt%) of 2D Ni-MOF was able to significantly improve the BDS up to a certain amount.…”

Section: Resultsmentioning

confidence: 99%

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Two-Dimensional Metal-Organic Framework Incorporated Highly Polar PVDF for Dielectric Energy Storage and Mechanical Energy Harvesting

et al. 2023

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Here, we introduce a 2D metal-organic framework (MOF) into the poly(vinylidene fluoride) (PVDF) matrix, which has been comparatively less explored in this field. Highly 2D Ni-MOF has been synthesized in this regard via hydrothermal route and has been incorporated into PVDF matrix via solvent casting technique with ultralow filler (0.5 wt%) loading. The polar phase percentage of 0.5 wt% Ni-MOF loaded PVDF film (NPVDF) has been found to be increased to ~85% from a value of ~55% for neat PVDF. The ultralow filler loading has inhibited the easy breakdown path along with increased dielectric permittivity and hence has enhanced the energy storage performance. On the other hand, significantly enriched polarity and Young’s Modulus has helped in improving its mechanical energy harvesting performance, thereby enhancing the human motion interactive sensing activities. The piezoelectric and piezo-tribo hybrid devices made up of NPVDF film have shown improved output power density of ~3.26 and 31 μW/cm2 compared to those of the piezoelectric and piezo-tribo hybrid devices comprising of neat PVDF (output power density ~0.6 and 17 μW/cm2, respectively). The developed composite can thus be considered an excellent candidate for multifunctional applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Two-Dimensional Metal-Organic Framework Incorporated Highly Polar PVDF for Dielectric Energy Storage and Mechanical Energy Harvesting

et al. 2023

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“…However, the addition of inorganic materials leads to deterioration in the weight and flexibility of the polymeric materials. In addition, there are also other unavoidable disadvantages, such as increased loss and a significant reduction in breakdown strength. , Although fillers with high breakdown strength (e.g., boron nitride, , aluminum oxide, etc.) can be used to achieve improved breakdown strength, this always results in the decay of the dielectric constant .…”

Section: Introductionmentioning

confidence: 99%

Gold Sputtering at the Interfaces: An Easily Operated Strategy for Enhancing the Energy Storage Capability of Laminated Polymer Dielectrics

Shi

Hou

et al. 2023

ACS Appl. Mater. Interfaces

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Polymers with excellent dielectric properties are strongly desired for pulsed power film capacitors. However, the adverse coupling between the dielectric constant and breakdown strength greatly limits the energy storage capability of polymers. In this work, we report an easily operated method to solve this problem via sputtering the interface of bilayer polymer films with ultralow content of gold nanoparticles. Interestingly, the gold nanoparticles can effectively block the movement of charge carriers because of the Coulomb blocking effect, yielding significantly enhanced breakdown strength. Meanwhile, the gold nanoparticles can act as electrodes to form numerous equivalent microcapacitors, resulting in an obviously enhanced dielectric constant. Impressively, the polymer film with merely 0.01 vol % gold nanoparticles exhibits an obvious dielectric constant and breakdown strength, which are 129 and 131% that of the pristine polymer film, respectively. Consequently, a high energy density which is 176% of that of the pristine polymer film is achieved, and a high efficiency of 79.2% is maintained. Moreover, this process can be well combined with the production process of commercial dielectric polymer films, which is beneficial for mass production. This work offers an easily operated way to improve the dielectric capacitive energy storage properties of polymers, which could also be applicable to other materials, such as ceramics and composites.

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“…Additionally, embedding inorganic fillers with two-dimensional nanomaterials, such as boron nitride (BN), , molybdenum disulfide (MoS 2 ), , montmorillonite (MMT), , graphene, , and MXene, , is another effective strategy. Among these fillers, MMT is an environmentally friendly natural clay, which can not only increase the content of polar crystals but also enhance mechanical and dielectric properties of PVDF. − Nevertheless, interlayer coupling in MMT and poor compatibility between PVDF and MMT often cause the agglomeration and poor dispersion of MMT in the PVDF matrix.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Improvement in γ-Phase Content and Dielectric Properties of PVDF/Deep Eutectic Solvent/Montmorillonite Composite Films

Yuan

Wang

et al. 2023

ACS Appl. Polym. Mater.

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The high dielectric constant of PVDF is very important for its high-performance energy storage dielectrics, but it is more critical to strike a proper balance between high dielectric constant and low dielectric loss. In this work, deep eutectic solvent (DES) and montmorillonite (MMT) have been used together to prepare γ-phase PVDF composite films with excellent dielectric properties. It is found that DES significantly induces crystallization of γ-phase and increases the dielectric constant of the composite due to the incremental ion motion. Meanwhile, DES greatly promotes the stripping and dispersion of MMT layers, which in turn inhibits the long-range ion migration and therefore suppresses the dielectric loss of the composite to a very low level. The dielectric constant of PVDF/MMT/DES composite films can increase to 32, while the dielectric loss remains as low as 0.06 at 1 kHz. Moreover, the synergistic effect of MMT/DES also contributes to enhancing the toughness and optical transmittance of composite films.

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Dielectric properties and energy storage performance of PVDF-based composites with MoS2@MXene nanofiller

Cited by 62 publications

References 70 publications

Two-Dimensional Metal-Organic Framework Incorporated Highly Polar PVDF for Dielectric Energy Storage and Mechanical Energy Harvesting

Two-Dimensional Metal-Organic Framework Incorporated Highly Polar PVDF for Dielectric Energy Storage and Mechanical Energy Harvesting

Gold Sputtering at the Interfaces: An Easily Operated Strategy for Enhancing the Energy Storage Capability of Laminated Polymer Dielectrics

Synergistic Improvement in γ-Phase Content and Dielectric Properties of PVDF/Deep Eutectic Solvent/Montmorillonite Composite Films

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