High breakdown strength and low loss binary polymer blends of poly(vinylidene fluoride‐trifluoroethylene‐chlorofluoroethylene) and poly(methyl methacrylate)

Liu, Feihua; Li, Zeyu; Wang, Qing; Xiong, Chuanxi

doi:10.1002/pat.4238

Cited by 46 publications

(26 citation statements)

References 33 publications

(60 reference statements)

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“…[34,35] In parallel to the organic/inorganic polymer nanocomposites, all-organic multiphase polymeric dielectrics have been reported for the improvement of energy storage performances. [36] For the fabrication of all-organic multiphase dielectrics, two miscible dielectric polymers with respective advantages can be directly mixed or blended; [37][38][39][40][41] on the other hand, one organic component can be incorporated as fillers or coated as the surface layer for another matrix polymer, [42,43] which have been demonstrated as effective approaches to tune the electrical displacement and breakdown behaviors of polymers. For instance, more recently, it has been demonstrated that the introduction of a polymethyl methacrylate nano-layer onto the surface of PVDF film enables modified surface defects and increased Young's modulus, leading to remarkably improved breakdown strength of 767.05 kV mm −1 in the PVDF-based all-organic dielectric polymer.…”

Section: Introductionmentioning

confidence: 99%

Ultrahigh Energy Density in Continuously Gradient‐Structured All‐Organic Dielectric Polymer Films

Jiang

Wang

Yan

et al. 2022

Adv Funct Materials

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High‐performance dielectric capacitors are critical for advanced electronics and electrical power systems. Polymeric dielectrics have been widely investigated for using in dielectric capacitors because of their high dielectric constants, flexibility, low density, and easy processability. However, it is still challenging to achieve simultaneous improvements in both energy density and efficiency in these dielectric polymers. Here, we report ferroelectric polyvinylidene‐fluoride‐based all‐organic dielectric polymer films with continuous compositional gradient structure are reported by modulating the spatial distribution of polymethyl‐methacrylate components, prepared via a facile and scalable additive manufacturing method. The continuous out‐of‐plane composition gradient in the all‐organic dielectric polymer films allows to tune electrical and mechanical behaviors, and thus induces a notably enhanced breakdown strength by modulating the electromechanical breakdown process related to the coupling of local electric field and stress. An ultrahigh discharge energy density of 38.8 J cm−3 along with a high discharge efficiency of >80% is achieved at the electric field of 800 kV mm−1 in the gradient polymer films, which is the highest energy density reported thus far in polymer‐based dielectrics including their nanocomposites and the highest energy efficiency achieved along with an energy density of >30 J cm−3.

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Section: Introductionmentioning

confidence: 99%

Ultrahigh Energy Density in Continuously Gradient‐Structured All‐Organic Dielectric Polymer Films

Jiang

Wang

Yan

et al. 2022

Adv Funct Materials

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“…Under a 200 MV/m electric field, 40 vol % P-DB composite films at different temperatures were tested. 10 , 35 In order to characterize the discharge performance of the capacitor, we define the time corresponding to 90% of the maximum discharge energy in the figure as the discharge time. 10 , 41 The experimental results are given in Figure 8 .…”

Section: Resultsmentioning

confidence: 99%

Improving the Energy Density and Efficiency of the Linear Polymer PMMA with a Double-Bond Fluoropolymer at Elevated Temperatures

Wen

Zhu

et al. 2021

ACS Omega

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A variety of applications can be found for high-temperature film capacitors, including energy storage components and pulsed power sources. In this work, in order to increase the energy density ( U e ), poly(vinylidene fluoride-chlorotrifluoroethylene-double bond) (P-DB) is introduced into poly(methyl methacrylate) (PMMA) to manufacture composite films by a solution casting process. In the case of the pure PMMA film, there is significant improvement in the polarization ( P max ) and breakdown field ( E b ) of the composite film. These improvements can effectively increase the U e of the composite film at room temperature and the elevated temperature. The results show that at an elevated temperature of 90 °C and at 350 MV/m, the U e of 40 vol % P-DB reaches 8.7 J/cm 3 , and the efficiency (η) of 77% is also considerable. Compared with biaxially oriented polypropylene (2.0 J/cm 3 ), the proposed film exhibits 4 times enhancement in the energy storage density, meaning that it can be an energy storage capacitor with huge potential at high temperatures.

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“…Polymer blends by direct mixing of ferro-polymer and a second component are one of the possibilities in this aspect. However, the progress from this blend approach is far from satisfied, where the polymer blends by controlling the composition, crystallization behaviors and interfaces issues enable weakened ferroelectricity or enhanced relaxor feature but fail to tune the ferroelectric nature of ferro-polymers [22][23][24][25][26][27]. To this end, here we demonstrate the feasibility of tuning the ferroelectric response in polymer blend by a facile two-step process.…”

Section: Introductionmentioning

confidence: 88%

Tuning ferroelectricity of polymer blends for flexible electrical energy storage applications

et al. 2021

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Ferroelectric polymers are the mainstay of advanced flexible electronic devices. How to tailor the ferroelectric polymer films for various applications via simple processing approaches is challenging. Here we demonstrate the tuning of ferroelectric responses can be achieved in polymer blends of poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) and polymethyl methacrylate (PMMA) prepared via a simple two-step process. The proposed two-step process endows the polymer blends with a random distribution of P(VDF-TrFE) crystalline phase, hence decoupling the coherent ferroelectric domain interactions between continuous ordered crystalline phases that ubiquitously existed in common P(VDF-TrFE) film. The incorporation of the miscible non-crystalline PMMA chains with low-polarity results in reversal dipoles and a transition from ferroelectric to antiferroelectric-like behavior, overcoming the trade-off between the polarization and depolarization fields. In particular, resultant excellent mechanical and electrical properties of the polymer blend films give rise to remarkably improved breakdown strength and energy storage performance, surpassing P(VDF-TrFE) and commercial biaxial-oriented polypropylene films. This work provides a simple and effective strategy to tailor the ferroelectric response of polymeric materials with great potential for flexible electrical energy storage applications.

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High breakdown strength and low loss binary polymer blends of poly(vinylidene fluoride‐trifluoroethylene‐chlorofluoroethylene) and poly(methyl methacrylate)

Cited by 46 publications

References 33 publications

Ultrahigh Energy Density in Continuously Gradient‐Structured All‐Organic Dielectric Polymer Films

Ultrahigh Energy Density in Continuously Gradient‐Structured All‐Organic Dielectric Polymer Films

Improving the Energy Density and Efficiency of the Linear Polymer PMMA with a Double-Bond Fluoropolymer at Elevated Temperatures

Tuning ferroelectricity of polymer blends for flexible electrical energy storage applications

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