Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9341957
S. Gortschakow, P. Pieterse, M. Hilbert, R. Kozakov, D. Uhrlandt, M. Kurrat
Light emission and electrical signals of partial discharge (PD) events in artificially introduced defects in insulating medium, namely polyethylene, polyvinyl chloride (PVC), silicone and polydimethylsiloxane (PDMS) have been examined. Internal discharges in a micro void and external discharges on insulator surface have been created using two specific experimental setups, which allow for observation of single discharges. The light pulses from single discharge events were registered by a photomultiplier. The discharge images have been acquired by an iCCD cameras with single and double stage amplification. Electrical signals have been measured using wideband probes. Two model arrangements have been developed and applied. Results of optical measurements are compared with conventional phase resolved partial discharge (PRPD) patterns. There exist different correlation modes between light intensity and value of partial discharge current, which can be ascribed to different type of PD origins. The comparison of optical and electrical signals shows a good correlation between both detection methods. Analysis of obtained discharge patterns in dependence on used material and electrode polarity is presented. It is shown that optical signals obtained from proper diagnostic devices carry similar information as conventional PRPD diagrams. The results of investigations can be used for development of new PD diagnostics.
{"title":"Electro-Optical Diagnostics of Single Partial Discharges","authors":"S. Gortschakow, P. Pieterse, M. Hilbert, R. Kozakov, D. Uhrlandt, M. Kurrat","doi":"10.1109/ICD46958.2020.9341957","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341957","url":null,"abstract":"Light emission and electrical signals of partial discharge (PD) events in artificially introduced defects in insulating medium, namely polyethylene, polyvinyl chloride (PVC), silicone and polydimethylsiloxane (PDMS) have been examined. Internal discharges in a micro void and external discharges on insulator surface have been created using two specific experimental setups, which allow for observation of single discharges. The light pulses from single discharge events were registered by a photomultiplier. The discharge images have been acquired by an iCCD cameras with single and double stage amplification. Electrical signals have been measured using wideband probes. Two model arrangements have been developed and applied. Results of optical measurements are compared with conventional phase resolved partial discharge (PRPD) patterns. There exist different correlation modes between light intensity and value of partial discharge current, which can be ascribed to different type of PD origins. The comparison of optical and electrical signals shows a good correlation between both detection methods. Analysis of obtained discharge patterns in dependence on used material and electrode polarity is presented. It is shown that optical signals obtained from proper diagnostic devices carry similar information as conventional PRPD diagrams. The results of investigations can be used for development of new PD diagnostics.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"8 1","pages":"850-853"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83468206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9341944
Yuya Miyazaki, N. Hirai, Y. Ohki
The degradation behavior of cross-linked polyethylene (XLPE) exposed to heat and radiation was investigated, focusing on its changes in chemical structure and mechanical properties. Infrared absorption spectroscopy (FT-IR), differential scanning calorimetry (DSC), and tensile tests were conducted. At the aging condition becomes more severe, the absorption due to carbonyl groups increases. In accord with this, the elongation at break decreases exponentially, while the enthalpy of fusion due to the melting of crystals decreases. When XLPE is exposed to heat and radiation, it is oxidized, which lowers the crystallinity and makes the crystals smaller. As a result, the mechanical properties of XLPE become degraded.
{"title":"Changes in Chemical Structure and Mechanical Properties Induced in Cross-linked Polyethylene by Thermal and Radiation Aging","authors":"Yuya Miyazaki, N. Hirai, Y. Ohki","doi":"10.1109/ICD46958.2020.9341944","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341944","url":null,"abstract":"The degradation behavior of cross-linked polyethylene (XLPE) exposed to heat and radiation was investigated, focusing on its changes in chemical structure and mechanical properties. Infrared absorption spectroscopy (FT-IR), differential scanning calorimetry (DSC), and tensile tests were conducted. At the aging condition becomes more severe, the absorption due to carbonyl groups increases. In accord with this, the elongation at break decreases exponentially, while the enthalpy of fusion due to the melting of crystals decreases. When XLPE is exposed to heat and radiation, it is oxidized, which lowers the crystallinity and makes the crystals smaller. As a result, the mechanical properties of XLPE become degraded.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"21 1","pages":"45-48"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78991293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9341931
S. Thakur, G. Callender, T. Andritsch, P. Lewin, A. Shaw, O. Cwikowski
A growing interest is observed in research to explore biodegradable alternative fluids as liquid insulation in high voltage equipment, due to their dielectric strength, environmental friendliness and enhanced fire safety. The present report deals with comparing the performance of possible alternative oils with silicone oil, which is typically used in the cable sealing ends. A detailed study of various physicochemical aspects and the impact of moisture ingress on these properties of mineral oil, natural and synthetic ester oil, and silicone oil is conducted. This work aims to identify the best liquid dielectric suitable for its application for cable terminations.
{"title":"A comparative analysis of different dielectric fluids for cable sealing ends","authors":"S. Thakur, G. Callender, T. Andritsch, P. Lewin, A. Shaw, O. Cwikowski","doi":"10.1109/ICD46958.2020.9341931","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341931","url":null,"abstract":"A growing interest is observed in research to explore biodegradable alternative fluids as liquid insulation in high voltage equipment, due to their dielectric strength, environmental friendliness and enhanced fire safety. The present report deals with comparing the performance of possible alternative oils with silicone oil, which is typically used in the cable sealing ends. A detailed study of various physicochemical aspects and the impact of moisture ingress on these properties of mineral oil, natural and synthetic ester oil, and silicone oil is conducted. This work aims to identify the best liquid dielectric suitable for its application for cable terminations.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"105 1","pages":"762-765"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79181426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9341996
G. Callender, P. Seri, R. Ghosh
This paper is intended to contribute to research into the interpretation of PD measurements under DC conditions. A simple PD system comprising of a cylindrical air filled void surrounded by polypropylene based copolymers is considered. A DC ramp of 1 kV/s reaching 10 kV was applied to the system and PD activity recorded from the start of the ramp for 104 seconds. An equivalent simulation model was constructed and used to investigate the influence of different phenomena. It was demonstrated that surface conduction is likely to play a crucial role in the applied field dynamics, leading to the cessation of PD activity. It also appears that charge deployed by PDs must be undergoing rapid recombination in order to support the high repetition rate in the first 1000 s of the experiment. The future work required to develop a full PD activity model is discussed.
{"title":"Simulations of Electric Field Dynamics for DC Partial Discharge Sequences","authors":"G. Callender, P. Seri, R. Ghosh","doi":"10.1109/ICD46958.2020.9341996","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341996","url":null,"abstract":"This paper is intended to contribute to research into the interpretation of PD measurements under DC conditions. A simple PD system comprising of a cylindrical air filled void surrounded by polypropylene based copolymers is considered. A DC ramp of 1 kV/s reaching 10 kV was applied to the system and PD activity recorded from the start of the ramp for 104 seconds. An equivalent simulation model was constructed and used to investigate the influence of different phenomena. It was demonstrated that surface conduction is likely to play a crucial role in the applied field dynamics, leading to the cessation of PD activity. It also appears that charge deployed by PDs must be undergoing rapid recombination in order to support the high repetition rate in the first 1000 s of the experiment. The future work required to develop a full PD activity model is discussed.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"55 1","pages":"501-504"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83903722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9342019
Weiwang Wang, Zhiqiang Guo, H. Miyake, Y. Tanaka, Shengtao Li
This paper aims at the measurement of the time dependence of the internal space charge and analysis of radiation induced conduction (RIC) in polyimide caused by electron beam irradiation. Both the normal PEA method and an “on-line” PEA system were employed to detect the space charge profiles after and during the electron irradiation. In view of that, a small size PEA device with a ring high voltage electrode was used for the “on-line” measurement. In addition, the electric conduction was discussed by the RIC theory. Negative charge accumulations were introduced by the irradiated electrons, which increase with the increase of electron energy and density. The behaviors of RIC depend on electron energy, indicating an enhancement with high electron energy. These phenomena are closely related to the charge deposition and electron-hole pairs. High energy and density of the electron beams introduced large amounts of negative charge accumulations. Meanwhile, they contributed to the high level of RIC. Consequently, the space charge would maintain the dynamic equilibrium in polyimide film.
{"title":"Radiation induced conduction and space charge dynamics in polyimide revealed by off-line and online PEA method","authors":"Weiwang Wang, Zhiqiang Guo, H. Miyake, Y. Tanaka, Shengtao Li","doi":"10.1109/ICD46958.2020.9342019","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9342019","url":null,"abstract":"This paper aims at the measurement of the time dependence of the internal space charge and analysis of radiation induced conduction (RIC) in polyimide caused by electron beam irradiation. Both the normal PEA method and an “on-line” PEA system were employed to detect the space charge profiles after and during the electron irradiation. In view of that, a small size PEA device with a ring high voltage electrode was used for the “on-line” measurement. In addition, the electric conduction was discussed by the RIC theory. Negative charge accumulations were introduced by the irradiated electrons, which increase with the increase of electron energy and density. The behaviors of RIC depend on electron energy, indicating an enhancement with high electron energy. These phenomena are closely related to the charge deposition and electron-hole pairs. High energy and density of the electron beams introduced large amounts of negative charge accumulations. Meanwhile, they contributed to the high level of RIC. Consequently, the space charge would maintain the dynamic equilibrium in polyimide film.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"2 1","pages":"375-378"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90158394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9341963
F. Seifert, I. Porizka, C. Leu
A big challenge for future electric grids is the energetic coupling of DC systems. This can be realized by Solid-State-Transformers with an operating medium frequency AC voltage generated by power electronic converters. The DC voltage and the superimposed medium frequency AC voltage stress the insulation system because of, for instance, partial discharges. In this paper, the results of the measurement of the charge accumulation by corona discharges at this composite voltage at a polyethylene surface are presented.
{"title":"Charge Accumulation at High DC Voltage and Superimposed Medium Frequency AC Voltage","authors":"F. Seifert, I. Porizka, C. Leu","doi":"10.1109/ICD46958.2020.9341963","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341963","url":null,"abstract":"A big challenge for future electric grids is the energetic coupling of DC systems. This can be realized by Solid-State-Transformers with an operating medium frequency AC voltage generated by power electronic converters. The DC voltage and the superimposed medium frequency AC voltage stress the insulation system because of, for instance, partial discharges. In this paper, the results of the measurement of the charge accumulation by corona discharges at this composite voltage at a polyethylene surface are presented.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"112 1","pages":"333-337"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73999703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9341838
S. Sarov Mohan, P. Preetha
Transformers are critical components of electric power transmission and distribution system. Mineral oil (MO) based multi-particle nanofluid (MPNF) were prepared with an intention to enhance electrical properties of MO by incorporating $A1_{2}O_{3}$ and TiO2 nanoparticles. Filler loading concentration and mixing ratio, which is the ratio between $A1_{2}O_{3}$ and TiO2 nanoparticle content is optimized by analyzing the simulation results. AC breakdown strength of the prepared samples were measured. It is found that, MPNF sample having a filler loading concentration of 0.1weight percentage (wt%) and mixing ratio of 9:1 shows highest AC breakdown strength. This sample shows an enhancement of 38.4%, 15.86%, and 17.41%, w.r.t pure oil, $A1_{2}O_{3}$ and TiO2 NFs having same filler loading concentration.
{"title":"Optimization of Filler Loading of Multi-Particle Mineral Oil Nanofluid for Transformer Insulation","authors":"S. Sarov Mohan, P. Preetha","doi":"10.1109/ICD46958.2020.9341838","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341838","url":null,"abstract":"Transformers are critical components of electric power transmission and distribution system. Mineral oil (MO) based multi-particle nanofluid (MPNF) were prepared with an intention to enhance electrical properties of MO by incorporating $A1_{2}O_{3}$ and TiO2 nanoparticles. Filler loading concentration and mixing ratio, which is the ratio between $A1_{2}O_{3}$ and TiO2 nanoparticle content is optimized by analyzing the simulation results. AC breakdown strength of the prepared samples were measured. It is found that, MPNF sample having a filler loading concentration of 0.1weight percentage (wt%) and mixing ratio of 9:1 shows highest AC breakdown strength. This sample shows an enhancement of 38.4%, 15.86%, and 17.41%, w.r.t pure oil, $A1_{2}O_{3}$ and TiO2 NFs having same filler loading concentration.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"14 1","pages":"712-715"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74758347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9342014
B.A. Orton, S. Cottrell, F. Pratt, S. Dodd, N. Chalashkanov
The development of a new technique using implanted 100% spin polarized positive muons to probe the behaviour of charge carriers within dielectrics is described. Muons are a well-established method for probing materials at the atomic level. They offer a local probe sensitive both to bound molecular charges and to free charge carriers in materials. A muon study to investigate the charge distribution within a composite dielectric - consisting of epoxy, mica and glass fibre components- as a function of the externally applied electric field strength (E-field) is reported. Implanted muons react with the host epoxy molecule, undergo chemical addition at specific locations and probe the local electronic structure. Muon spectra are interpreted through a comparison with the electronic structure calculated using Density Functional Theory.It is shown that the application of an external E-field modifies the form of the observed spectra. It is believed that the effect of an E-field on identified bound charges within the molecule is being observed, suggesting muons are an excellent probe for understanding local charge redistributions in polymeric dielectrics.
{"title":"Investigating the Electronic Properties of a Composite Dielectric under an Applied Electric Field by Muon Spectroscopy","authors":"B.A. Orton, S. Cottrell, F. Pratt, S. Dodd, N. Chalashkanov","doi":"10.1109/ICD46958.2020.9342014","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9342014","url":null,"abstract":"The development of a new technique using implanted 100% spin polarized positive muons to probe the behaviour of charge carriers within dielectrics is described. Muons are a well-established method for probing materials at the atomic level. They offer a local probe sensitive both to bound molecular charges and to free charge carriers in materials. A muon study to investigate the charge distribution within a composite dielectric - consisting of epoxy, mica and glass fibre components- as a function of the externally applied electric field strength (E-field) is reported. Implanted muons react with the host epoxy molecule, undergo chemical addition at specific locations and probe the local electronic structure. Muon spectra are interpreted through a comparison with the electronic structure calculated using Density Functional Theory.It is shown that the application of an external E-field modifies the form of the observed spectra. It is believed that the effect of an E-field on identified bound charges within the molecule is being observed, suggesting muons are an excellent probe for understanding local charge redistributions in polymeric dielectrics.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"64 1","pages":"562-565"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75549321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9341921
P. Seri, G. Montanari
Designing insulation systems for DC application is not straightforward as under AC, both because electric field can distribute inside the insulation in significantly different ways, and due to the effect on field distribution of voltage transients, such as energizations and the polarity inversions. During and after each voltage variation, the electric field in the insulation is mainly driven by permittivity, as in AC, while at steady-state the electric field profile depends on conductivity and, hence, on dielectric material and load. This can impact on aging phenomena and rate, thus on the electro-thermal life of an insulation system. It is, therefore, important to estimate how long it takes for the electric field to reach its steady state condition (i.e. the transient time) upon voltage-time variations. Different methods for estimating the electric field transient time are discussed in this paper, from conductivity and permittivity measurements at high or low fields, as a function of temperature, to partial discharge time evolution. Specimens made by polymeric materials having different conductivities, and containing artificial defects, are used for the experimental validation of those methods.
{"title":"Modelling the electric field transients in DC insulation systems upon energization and voltage polarity inversion","authors":"P. Seri, G. Montanari","doi":"10.1109/ICD46958.2020.9341921","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341921","url":null,"abstract":"Designing insulation systems for DC application is not straightforward as under AC, both because electric field can distribute inside the insulation in significantly different ways, and due to the effect on field distribution of voltage transients, such as energizations and the polarity inversions. During and after each voltage variation, the electric field in the insulation is mainly driven by permittivity, as in AC, while at steady-state the electric field profile depends on conductivity and, hence, on dielectric material and load. This can impact on aging phenomena and rate, thus on the electro-thermal life of an insulation system. It is, therefore, important to estimate how long it takes for the electric field to reach its steady state condition (i.e. the transient time) upon voltage-time variations. Different methods for estimating the electric field transient time are discussed in this paper, from conductivity and permittivity measurements at high or low fields, as a function of temperature, to partial discharge time evolution. Specimens made by polymeric materials having different conductivities, and containing artificial defects, are used for the experimental validation of those methods.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"770 Pt A 1","pages":"485-488"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77050146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-05DOI: 10.1109/ICD46958.2020.9341867
B. Du, J. Xing, M. Xiao, Jin Li, R. Xu, Z. Ran, H. Liu, H.L. Sun
Ferroelectric polymer P(VDF-TrFE-CFE) is widely employed as energy storage materials of dielectric capacitors, but the discharge energy density of P(VDF-TrFE-CFE) is limited by the lower breakdown strength, which restricts the further development. The paper proposes a solution by preparing P(VDF-TrFE-CFE) composites based on bilayer structure and nanoparticles. Polyimide (PI) with high breakdown strength is used as the bottom layer, and the BaTiO3/Ferroelectric polymer composites BT-P(VDF-TrFE-CFE) with high dielectric constant is used as the top layer, the bilayer composite films PI/BTP(VDF-TrFE-CFE) doped with different content of BaTiO3 (1 vol.%, 3 vol.%, 5 vol.%) were prepared via coating, heat treatment and quenching. The microstructure and energy storage performance of bilayer films were analyzed, the results show that the discharge energy density of composite film doping with 3 vol.% of BaTiO3 can be up to 9.8 J/cm3 at 440 kV/mm, which is higher than pure P(VDF-TrFE-CFE) film (7.2 J/cm3). The energy storage efficiency of composite film is 46% at 440 kV/mm, slightly lower than pure P(VDF-TrFE-CFE) film (49% at 337 kV/mm).
{"title":"Bilayer PI/BaTiO3-P(VDF-TrFE-CFE) composites with high discharge energy density","authors":"B. Du, J. Xing, M. Xiao, Jin Li, R. Xu, Z. Ran, H. Liu, H.L. Sun","doi":"10.1109/ICD46958.2020.9341867","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341867","url":null,"abstract":"Ferroelectric polymer P(VDF-TrFE-CFE) is widely employed as energy storage materials of dielectric capacitors, but the discharge energy density of P(VDF-TrFE-CFE) is limited by the lower breakdown strength, which restricts the further development. The paper proposes a solution by preparing P(VDF-TrFE-CFE) composites based on bilayer structure and nanoparticles. Polyimide (PI) with high breakdown strength is used as the bottom layer, and the BaTiO3/Ferroelectric polymer composites BT-P(VDF-TrFE-CFE) with high dielectric constant is used as the top layer, the bilayer composite films PI/BTP(VDF-TrFE-CFE) doped with different content of BaTiO3 (1 vol.%, 3 vol.%, 5 vol.%) were prepared via coating, heat treatment and quenching. The microstructure and energy storage performance of bilayer films were analyzed, the results show that the discharge energy density of composite film doping with 3 vol.% of BaTiO3 can be up to 9.8 J/cm3 at 440 kV/mm, which is higher than pure P(VDF-TrFE-CFE) film (7.2 J/cm3). The energy storage efficiency of composite film is 46% at 440 kV/mm, slightly lower than pure P(VDF-TrFE-CFE) film (49% at 337 kV/mm).","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"206 1","pages":"185-188"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77060536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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