Abstract. The cryogenic energy storage unit described in this article is a device that is able to absorb heat at constant temperature and that provides some significant advantages over the cryogenic storage units working at the triple point. It consists in a low temperature cell coupled to a relatively large expansion volume at room …
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The test results show that PI fibers can greatly increase the high-temperature breakdown strength and thus improve the high-temperature energy storage performance of the composite dielectric. 5 vol% PI@PEI composite has the best energy …
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Despite a great deal of effort has been taken to investigate polymer-based composites dielectrics, there is a few research on pure polymers for high-temperature energy storage. In recent years, Polyoxanorbornene (PONB in Fig. 1 c) and its fluorinated derivatives Polyoxafluorinatednorbornene [21] (POFNB in Fig. S2) breaks the bottleneck …
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Finally, CFC-2 has excellent temperature stability and energy storage performance; it can withstand a breakdown strength of 500 MV m −1 even at 100 °C, and its energy storage density (6.35 J cm −3) and …
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The obtained PEI-based nanocomposite films with ZnO-ZnS heterostructure nanoparticles possess an excellent high-temperature energy storage density about 3.6 J cm −3 and fatigue resistance over a straight 50,000 charge–discharge cycles at 150 C.
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It not only maintains the balance of breakdown strength and dielectric constant, but also has the synergistic effect to improve energy storage density and efficiency. As a result, the PEI-based nanocomposites loaded with 4 vol% hierarchically structured BNNS@ST nanofillers attain superb U d of 4.29 J cm −3, with η > 80% at 150 …
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The development of lead-free dielectric ceramics with excellent energy storage properties has received extensive research attention. Herein, Er 2 O 3 modified Sr 0.35 Bi 0.35 K 0.25 TiO 3 (SBKT) composite ceramic is investigated. As 2 wt.% Er 2 O 3 is added, a certain amount of insulating second phase with fewer regions of high local …
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However, the poor energy storage density and high temperature reliability are difficult to address further requirements for practical applications in high temperature environment [4]. Thus, it is essential to gained simultaneously superior energy storage density ( W rec > 6 J/cm 3 ) and high temperature ( T ∼ 200 °C) reliability in next-generation ceramic …
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Thermal energy storage (TES) in solid, non-combustible materials with stable thermal properties at high temperatures can be more efficient and economical …
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The 9 : 1 composite dielectric at 150 °C demonstrates an energy storage density of up to 6.4 J cm −3 and an efficiency of 82.7%. This study offers a promising …
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The energy density of a capacitor is strongly dependent on dielectric constant and breakdown strength of a dielectric material. Here, we demonstrate a class of solution-processable polymer nanocomposites exhibiting a concurrent improvement in dielectric constant and breakdown strength, which typically show a negative correlation …
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Significantly enhanced dielectric constant and energy storage properties in polyimide/reduced BaTiO 3 composite films with excellent thermal stability Shuangshuang Yue, a Baoquan Wan,a Yunying Liub and Qiwei Zhang *ac In this work, reduced BaTiO 3 (rBT) particles with a large number of defects sintered in a reducing
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This paper aims at studying the heat sources, energy storage and dissipation in three high-strength steels using digital infrared thermography and digital image correlation. A thermodynamically-based elasto-plastic model with two non-linear isotropic hardening variables is used to describe both the stress–strain behaviour and the …
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2.2 Conduction and Breakdown Strength. High-temperature dielectric materials for energy storage are always subjected to high electric field and elevated temperature which easily cause the increased electric conduction loss and large leakage current. Severe conduction loss results in the unex-pected energy loss and joule heat in capacitors ...
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Dielectric materials for electrical energy storage at elevated temperature have attracted much attention in recent years. Comparing to inorganic dielectrics, polymer-based organic dielectrics possess excellent flexibility, low cost, lightweight and higher electric breakdown strength and so on, which are ubiquitous in the fields of electrical ...
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Cheng, S. et al. Polymer dielectrics sandwiched by medium-dielectric-constant nanoscale deposition layers for high-temperature capacitive energy storage. Energy Storage Mater. 42, 445–453 (2021).
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Importantly, PMHT filler can improve the dielectric constant of PEI. As a result, 0.75 wt% PMHT/PEI delivers an ultrahigh discharge energy density ( U d ) of 10.7 J cm −3 at an E b of 680 MV m −1 and at room temperature, and maintains a charge and discharge efficiency of above 90%.
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Sandwich-structured polyimide-based composite films exhibit excellent energy storage properties and maximum field strength with high-temperature stability.
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Stratified thermal energy storage model with constant layer temperature The formulation of the CLT model with layers of fixed temperature and varying content is described in this appendix, which extends the model of Muschick et …
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Polymer dielectrics sandwiched by medium-dielectric-constant nanoscale deposition layers for high-temperature capacitive energy storage Energy Storage Mater., 42 ( 2021 ), pp. 445 - 453 View PDF View article View in Scopus Google Scholar
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There is a constant need in the modern electronic industry for capacitors with high capacity per volume in order to use in many applications such as memories devices, energy storage, microwave filters, among others. The synthesis, characterization and study of materials with a very high or giant dielectric constant are in particular …
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Section snippets Factors affecting energy storage of intrinsic polymer dielectrics Polymer dielectric materials used in film capacitors usually require higher energy densities [8,32,34]. According to the classical electromagnetic theory, the electric displacement (D) of the material caused by the electric field intensity of E is E d D, and …
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Ceramics materials can have high dielectric constant and high temperature performance, whereas their applications for high energy density storage …
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Received: 22 December 2022-Revised: 6 February 2023-Accepted: 20 February 2023-IET Nanodielectrics DOI: 10.1049/nde2.12044 ORIGINAL RESEARCH High temperature energ y storage and release proper ties of polyimide nanocomposites simulated by
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These two crucial parameters E and εr are decisive for the level of energy density for dielectric devices. Intensive investigations have been performed on the …
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Flexible PI films with and without the MMT/PVA coating are shown in Fig. 1 (b) pared with the uncoated PI films, the coated PI films exhibit nacre-like iridescence when exposed to light, which is shown in, Appendix A Supplementary material g. 1 (c) shows the X-ray diffraction (XRD) patterns obtained from the uncoated and coated PI films.
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Ultimately, the KNN–0.175BLN samples presented the excellent dielectric properties with high dielectric constant (1735) and low dielectric loss (1.9%) at room …
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Conventional construction materials have sensible heat storage, wherein the temperature of the sensible storage phase material increases linearly with the increase in the external temperature [7]. In contrast, latent thermal storage materials absorb or release heat without any change in their temperature, until their energy storage …
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