Film capacitor materials for electric vehicle applications: Status Quo and future prospects

Progress in Materials Science, Год журнала: 2025, Номер unknown, С. 101458 - 101458

Опубликована: Фев. 1, 2025

Язык: Английский

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Significantly Enhanced Energy Density of Polyvinylidene Fluoride/Polyimide-Based Nanocomposites by Core–Shell BaTiO₃@SiO₂

Langmuir, Год журнала: 2024, Номер 40(14), С. 7710 - 7722

Опубликована: Март 26, 2024

Improving the limited energy storage capacity of dielectric materials has long been an attractive challenge. In this work, a four-phase hybridized nanocomposite was designed. The linear polymer polyimide (PI) added to ferroelectric polyvinylidene fluoride (PVDF) and compounded with nanoceramic BT@SiO2 core–shell structure. results show that PVDF–PI/BT@SiO2 nanocomposites prepared by straightforward spin-coating method have significantly increased discharge density. blends obtain tightly extended conformation in amorphous region. Also, provides excellent matrix environment for homogeneous dispersion fillers. structure, as physical barrier, not only hinders expansion breakdown path but also extends multiple polarization surfaces gradient variations at microscopic level. Therefore, synergistic effect generated blending structure effectively enhances stored characteristics nanocomposites. constant is stable 11.39–18.7, loss always lower than 0.136. density 2.5 J/cm3, almost 110% higher BOPP films (about 1.2 J/cm3). These experimental suggest composite system using new way improve materials.

Язык: Английский

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Enhanced Energy Storage Properties of Polypropylene through Crystallization Modulation

ACS Applied Polymer Materials, Год журнала: 2024, Номер 6(8), С. 4808 - 4817

Опубликована: Апрель 11, 2024

Polypropylene (PP), renowned for its high breakdown strength (E), low dielectric loss (tan δ), and excellent self-healing properties, is widely utilized as the state-of-the-art polymer in power capacitors green electric vehicles. However, constant (K) limited discharged energy density (Ue) of polypropylene hinder development miniaturization integration. Here, a scalable polypropylene-based film with storage properties comprising lanthanide functional fillers (WBG) has been prepared using melt extrusion process. Remarkably, composite only 0.10 wt % WBG demonstrates Ue 7.05 J/cm3 an ultrahigh charge–discharge efficiency (η) 99.6% at 581.6 MV/m, coupled long-term cyclic stability. The enhanced have systematically analyzed attributed to formation β-crystalline phase polarization induced by WBG. In practical application demonstration, constructed from extruded films display stronger brightness, exhibiting higher capacity than pure PP capacitors. This work provides strategy fabricate on industrial scale.

Язык: Английский

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High-Energy-Density Polypropylene Nanocomposite Dielectrics Incorporating Nonpolar TiO₂ Nanorod

ACS Applied Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 5, 2025

Язык: Английский

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Improved Dielectric and Energy Storage Properties of Polypropylene-Based Organic Films through Construction of a Microcompatible “Sea–Island” Structure

ACS Applied Polymer Materials, Год журнала: 2024, Номер 6(13), С. 7449 - 7457

Опубликована: Июль 2, 2024

With the development of modern power systems, advanced energy storage polymer films are receiving attention. As an important dielectric material, polypropylene (PP) film has advantages low loss and high charge/discharge efficiency. Nevertheless, its inherent constant (∼2.0) severely hampers enhancement density (∼1–2 J/cm3). Herein, all-organic PP-based ternary composite with "sea–island" structure were designed to improve properties PP. In this research, PP formed sea phase. contrast, methyl methacrylate-co-glycidyl methacrylate (MG) copolymer island phase polypropylene-grafted maleic anhydride (PP-g-MAH) as compatibilizer. The higher polarity MG, PP-g-MAH, interfacial polarization between two-phase interface improved 3.8, while remained almost unchanged compared itself. When loading MG was 12 wt %, discharge PP/MG/PP-g-MAH reached 5.87 J/cm3 a 610 MV/m breakdown strength; furthermore, efficiency still at about 96%, which shows good application prospect in field thin capacitors.

Язык: Английский

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Surface‐Confined Winding Assembly of SiO₂ on the Surface of BaTiO₃ Leading to Enhanced Performance of Dielectric Nanocomposites

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Авг. 15, 2024

Abstract In response to the demand for miniaturization and lightweighting in electronics industry, achieving enhanced energy density of dielectrics is crucial. Constructing nanocomposites consist ceramic fillers polymer matrix an effective strategy this regard. To address adverse coupling between polarization breakdown strength nanocomposites, a series BaTiO 3 @SiO 2 nanofillers with customizable SiO shell coverage degrees (90°, 180°, 360°) designed synthesized by surface‐confined winding assembly on surface . When half area core coated layer, it defined as 180°. A larger degree implies better reduction leakage current injection, more suppression local electric field concentration. However, also leads pronounced polarization. 180° demonstrates most mitigation nanocomposites. The /Poly(vinylidene fluoride) (PVDF) nanocomposite achieves high while maintaining relatively higher intensity, example, reaches 20.64 J cm −3 at 650 MV m −1 , which 2.62 times pure PVDF. This work reveals growth mechanism surfaces, providing high‐performance

Язык: Английский

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Fundamentals of Flexoelectricity, Materials and Emerging Opportunities Toward Strain‐Driven Nanocatalysts

Small, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 6, 2024

Abstract Flexoelectricity, an intrinsic property observed in materials under nonuniform deformation, entails a coupling between polarization and strain gradients. Recent catalyst advancements have reignited interest flexoelectricity, particularly at the nanoscale, where pronounced gradients promote robust flexoelectric effects. This paper comprehensively examines encompassing methodologies for precise measurement, elucidating its distinctions from related phenomena, exploring potential applications augmenting catalytic properties. So far, greatest potentials are based on lead strontium titanate (PST) other metallic titanates such as titania (TiO 2 ), (STO), barium (BST) sulfates (MoS , ZnS) halide perovskites (with archetype XPbI 3 ). review explores promise of properties addressing material photocatalytic challenges, charge carrier recombination ineffective surface separation. Additionally, it sheds light synergy with emerging paradigms like photo‐flexo catalysis synergistic flexo‐piezo catalysis, specifically focusing selective chemical transformations green hydrogen production. Current limitations to usage photoflexoelectricity photocatalysis mostly stability used substance (susceptibility photodegradation) or voltage values, which represent inferior specific practical applications. work underscores indispensable role flexoelectricity capacity steer future research technological advancement.

Язык: Английский

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A Microwave-Assisted, Solvent-Free Approach for Effective Grafting of High-Permittivity Fillers to Construct Homogeneous Polymer-Based Dielectric Film with High Energy Density

Composites Science and Technology, Год журнала: 2024, Номер 257, С. 110848 - 110848

Опубликована: Сен. 2, 2024

Язык: Английский

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Constructing ZrO2@UiO-66 heterostructure nanoparticles to significantly improve energy storage density of PEI-based nanocomposites at high temperature

Chemical Engineering Journal, Год журнала: 2024, Номер 500, С. 157524 - 157524

Опубликована: Ноя. 1, 2024

Язык: Английский

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A polypropylene-based all-organic dielectric polymer film with high dielectric constant, low dielectric loss, and high breakdown strength

Polymer, Год журнала: 2025, Номер unknown, С. 128116 - 128116

Опубликована: Фев. 1, 2025

Язык: Английский

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