Gas–solid interface charge tailoring techniques: what we grasped and where to go

Zhang, Zhousheng; Wang, Zheming; Teyssèdre, G.; Shahsavarian, Tohid; Baferani, Mohamadreza Arab; Chen, Geng; Lin, Chuanjie; Zhang, Bo; Riechert, Uwe; Lei, Zhipeng; Cao, Yang; Li, Chuanyang

doi:10.1088/1361-6528/abccea

Cited by 29 publications

(38 citation statements)

References 99 publications

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“…It is necessary to clarify the space charge behaviour and mechanism in environmental-friendly DC cable insulating materials from a microscopic level, which is helpful to design the insulating materials and structures in a targeted manner to reduce the impact of space charge [240]. Designing interfaces is another way to explore to mitigate space charge effects, both from volumic insulation and surface flashover perspective [241,242]. Naturally, power cables are not the only domain where the question of recyclability and environmentalfriendly poses.…”

Section: ) Solid Environmental-friendly Insulating Materialsmentioning

confidence: 99%

Insulating materials for realising carbon neutrality: Opportunities, remaining issues and challenges

Yang

et al. 2022

High Voltage

Self Cite

113

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The 2050 carbon‐neutral vision spawns a novel energy structure revolution, and the construction of the future energy structure is based on equipment innovation. Insulating material, as the core of electrical power equipment and electrified transportation asset, faces unprecedented challenges and opportunities. The goal of carbon neutral and the urgent need for innovation in electric power equipment and electrification assets are first discussed. The engineering challenges constrained by the insulation system in future electric power equipment/devices and electrified transportation assets are investigated. Insulating materials, including intelligent insulating material, high thermal conductivity insulating material, high energy storage density insulating material, extreme environment resistant insulating material, and environmental‐friendly insulating material, are categorised with their scientific issues, opportunities and challenges under the goal of carbon neutrality being discussed. In the context of carbon neutrality, not only improves the understanding of the insulation problems from a macro level, that is, electrical power equipment and electrified transportation asset, but also offers opportunities, remaining issues and challenges from the insulating material level. It is hoped that this paper envisions the challenges regarding design and reliability of insulations in electrical equipment and electric vehicles in the context of policies towards carbon neutrality rules. The authors also hope that this paper can be helpful in future development and research of novel insulating materials, which promote the realisation of the carbon‐neutral vision.

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Section: ) Solid Environmental-friendly Insulating Materialsmentioning

confidence: 99%

Insulating materials for realising carbon neutrality: Opportunities, remaining issues and challenges

Yang

et al. 2022

High Voltage

Self Cite

113

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“…This is more prominent than the increase with some of the current best methods [25][26][27][28]. However, polymer dielectrics will accumulate a large amount of charge on the surface during actual use [29,30] causing distortion of the surface electric field and resulting in a significant drop in flashover voltage [31,32]. Therefore, when the surface is precharged, the flashover voltage of PTFE drops to 20.4 kV, and the drop is as high as 57%.…”

Section: Electric Strength Testmentioning

confidence: 99%

Self-assembled wide bandgap nanocoatings enabled outstanding dielectric characteristics in the sandwich-like structure polymer composites

Wang

Liu

et al. 2022

Nano Convergence

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Polymer dielectrics are insulators or energy storage materials widely used in electrical and electronic devices. Polymer dielectrics are needed with outstanding dielectric characteristics than current technologies. In this study, the self-assembly of boron nitride nanosheets (BNNSs) was applied to form an inorganic–organic nanocoating on various common polymer dielectrics. It is inexpensive and easy to fabricate this thin coating on a large scale. The coating has a wide bandgap and thus can significantly improve the breakdown strength of polymer dielectrics. The charge characteristics and trapping parameters of nano-domains on the surfaces of polymer dielectrics were measured, and the coating had shallow trap levels. This facilitated the dissipation of surface charges and thus greatly increased the flashover voltage. The coating also effectively improved the temperature stability and dielectric constant of the polymer dielectric. This nanocoating shows potential as a method to effectively improve the dielectric characteristics of polymer dielectrics and outperform existing composite polymer dielectrics, which are crucial for large-scale applications in energy storage and power and electronic devices.

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“…Previous studies show that two mechanisms are proposed to enhance the surface insulation properties of composites: charged suppression and charge dissipation. By doping insulating filler, Zhao et al [ 8,9 ] increased the flashover voltage of the composites due to the improvement of the surface resistivity, which suppressed the charge migration; Xie et al [ 10,11 ] formed a conductive channel inside the epoxy composites by doping the semiconductor filler, which accelerated the charge dissipation, and improved the surface insulation properties; Li et al [ 12 ] introduced the “dam‐flood” model to classify and generalize the charge regulation techniques at the gas–solid interface, and pointed out that inhibiting charge injection at the dielectric interface while simultaneously draining the surface charge could effectively increase the flashover voltage. The surface of GFRP is composed of exposed GF and polymer matrix, and there is a complete fiber network structure inside.…”

Section: Introductionmentioning

confidence: 99%

Enhancing surface insulation of glass fiber reinforced polymer composites by plasma fluorinating glass fiber

Duan

Xia

et al. 2022

Polymer Composites

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Glass fiber reinforced polymer (GFRP) is a widely used composite material in industrial production. In this article, glass fiber (GF) was fluorinated by dielectric barrier discharge (DBD), and the GFRP composites made of GF with different fluorination time and various numbers of fluorinated GF layers were prepared to improve the surface insulation property. The effect of plasma fluorination on GF was analyzed by scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS), including the surface morphology and chemical composition. In addition, the surface electrical properties of the above composites were investigated experimentally. The results show that the flashover voltage of modified GFRP is 29.84% higher than that of the original sample. By analyzing the charge dissipation and trap, it is inferred that plasma fluorination can raise the trap energy level of the composites, therefore suppressing the carrier migration on the surface and increasing the flashover voltage. Furthermore, the internal structure of composites can be improved by increasing the number of fluorinated GF layers, which accelerates the charge dissipation along the body, thus enhancing the surface insulation properties of the composites in both ways.

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Gas–solid interface charge tailoring techniques: what we grasped and where to go

Cited by 29 publications

References 99 publications

Insulating materials for realising carbon neutrality: Opportunities, remaining issues and challenges

Insulating materials for realising carbon neutrality: Opportunities, remaining issues and challenges

Self-assembled wide bandgap nanocoatings enabled outstanding dielectric characteristics in the sandwich-like structure polymer composites

Enhancing surface insulation of glass fiber reinforced polymer composites by plasma fluorinating glass fiber

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