Simulation of nanodielectrics: nanoparticle and interphase effects on electric field distributions

Hashim, Zuridah; Lau, Kwan Yiew; Tan, Chee Wei; Ching, Kuan Yong

doi:10.1049/iet-nde.2019.0032

Cited by 11 publications

(3 citation statements)

References 29 publications

(56 reference statements)

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“…In the field of polymer dielectrics, computational simulation has become a new and effective way to promote the development of this field, and it plays an important role in the performance analysis and rational design of polymer dielectrics. − Wang applied the phase field method to composite dielectrics to explore the relationship between the filler orientation and the macro-dielectric properties, and realized the connection between the microscopic structure and the macroscopical properties . Additionally, the phase field method was adopted by Hong to realize the dynamic simulation of the breakdown process of dielectrics, and the influence of the structure and electrode conditions on the dielectric breakdown was studied .…”

Section: Computational Strategies For Dielectric Polymersmentioning

confidence: 99%

Recent Progress and Future Prospects on All-Organic Polymer Dielectrics for Energy Storage Capacitors

et al. 2021

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With the development of advanced electronic devices and electric power systems, polymer-based dielectric film capacitors with high energy storage capability have become particularly important. Compared with polymer nanocomposites with widespread attention, all-organic polymers are fundamental and have been proven to be more effective choices in the process of scalable, continuous, and large-scale industrial production, leading to many dielectric and energy storage applications. In the past decade, efforts have intensified in this field with great progress in newly discovered dielectric polymers, fundamental production technologies, and extension toward emerging computational strategies. This review summarizes the recent progress in the field of energy storage based on conventional as well as heat-resistant all-organic polymer materials with the focus on strategies to enhance the dielectric properties and energy storage performances. The key parameters of all-organic polymers, such as dielectric constant, dielectric loss, breakdown strength, energy density, and charge–discharge efficiency, have been thoroughly studied. In addition, the applications of computer-aided calculation including density functional theory, machine learning, and materials genome in rational design and performance prediction of polymer dielectrics are reviewed in detail. Based on a comprehensive understanding of recent developments, guidelines and prospects for the future development of all-organic polymer materials with dielectric and energy storage applications are proposed.

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Section: Computational Strategies For Dielectric Polymersmentioning

confidence: 99%

Recent Progress and Future Prospects on All-Organic Polymer Dielectrics for Energy Storage Capacitors

et al. 2021

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“…Since SiC particles have higher electrical conductivity and dielectric constant than those of the matrix, the external electric field will affect the distribution of the electric field inside the material. As can be seen from Figure 7 , the electric field is seriously distorted at the location where two particles are close, resulting in a local high field strength of the epoxy resin matrix in this part [ 27 ]. With the increase of the filling ratio of SiC particles, the average geometric distance between SiC particles decreases, the degree of electric field distortion is more serious, there are more places with local high field strength, and the field strength value of part of the epoxy matrix is also higher.…”

Section: Resultsmentioning

confidence: 99%

Research on Improving the Partial Discharge Initial Voltage of SiC/EP Composites by Utilizing Filler Surface Modification and Nanointerface Interaction

et al. 2022

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SiC/EP composites are promising insulating materials due to their high thermal conductivity, stable chemical properties, and nonlinear electrical conductivity. However, the compatibility of micron-sized SiC particles with the organic polymer matrix is poor, and defects such as air gaps may be introduced at the interface, which reduces the partial discharge resistance of the composite materials. In order to improve the partial discharge initial voltage (PDIV) of SiC/EP composites, in this paper, SiC/EP composites with different proportions were prepared by surface modification of filler and compound of micro/nano particles. Firstly, a method of secondary modification of SiC particles was proposed, which was first modified by alkali washing and then silane coupling agent KH560, and the effectiveness of the modification was verified. Therefore, the interface bonding ability between the filler and the matrix was improved, the air gap defects at the interface were reduced, and the PDIV of the composite material was improved. When the filling ratio is 10 wt%, the PDIV was enhanced by 13.75%, and when the filling ratio was further increased, the improvement was reduced. In contrast, the introduction of nanoparticles into the composites can effectively improve the PDIV of composite materials. In this study, nanoparticles were used to form a shell-core structure in epoxy resins to exert their huge specific surface area and active surface properties, thereby changing the overall crosslinking properties of the composites. Through experimental research, the optimal micro-nano particle compounding ratio was explored. Under the optimal mixing ratio, the PDIV of the composite material can be increased by more than 90%.

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“…Converters have also been fed by battery‐driven energy resources [10]. Modelling of nanoparticles has been introduced that have been found suitable for simulation and study of their different properties [11]. A neural network‐based approach has been introduced for the assessment of dielectric properties of the nanomaterials [12].…”

Section: Introductionmentioning

confidence: 99%

Switching transient‐based state of Ampere‐hour prediction of lithium‐ion, nickel‐cadmium, nickel‐metal‐hydride and lead acid batteries used in vehicles

Ray

Roy

Chattopadhyay³

2021

IET Nanodielectrics

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The state of the ampere-hour capacity of the battery depends on the condition of materials used in it. Large reduction of capacity ends with maintenance or replacement of the battery. Modern battery materials include application of nanomaterials and nanotechnology in various stages of production. This article attempts to monitor the capacity of battery used for vehicles which are made of different types of materials using switching transients. The analytical part was done using wavelet-based decompositions. Data sets of large number of coefficients have been developed for learning. Their statistical behaviour has been studied, and monitoring was initially carried out by some selective parameters. Then the artificial neural network-based algorithm was developed which includes all features of statistical variation for better monitoring. Case studies have been carried out followed by comparison. The study ends with a satisfactory monitoring.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Simulation of nanodielectrics: nanoparticle and interphase effects on electric field distributions

Cited by 11 publications

References 29 publications

Recent Progress and Future Prospects on All-Organic Polymer Dielectrics for Energy Storage Capacitors

Recent Progress and Future Prospects on All-Organic Polymer Dielectrics for Energy Storage Capacitors

Research on Improving the Partial Discharge Initial Voltage of SiC/EP Composites by Utilizing Filler Surface Modification and Nanointerface Interaction

Switching transient‐based state of Ampere‐hour prediction of lithium‐ion, nickel‐cadmium, nickel‐metal‐hydride and lead acid batteries used in vehicles

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