Enhanced Dielectric Properties of Multilayer Capacitor Film via Interfacial Polarization
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Case Western Reserve University School of Graduate Studies / OhioLINK
2016
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=case1449137228 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-case14491372282021-08-03T06:34:09Z Enhanced Dielectric Properties of Multilayer Capacitor Film via Interfacial Polarization Tseng, Jung-Kai Polymers Engineering Energy Dielectrics electrical energy multilayered films coextrusion interfacial polarization internal conduction thermal stimulated discharging current broadband dielectric spectroscopy electrical displacement-field loops In order to fulfill the urgent need of new generation capacitor film, the co-extruded multilayer film being proposed possess several crucial factors high dielectric constant, low loss and high operation temperatures. In order to get deep understanding of prevailing dielectric performance in multilayer film, the breakdown strength, dielectric lifetime measurement and D-E loop measurement were conducted. Based on the dielectric properties of multilayer capacitor films, the interfacial polarization effect on the insulation properties are revealed. In the PSF/PVDF multilayer films, two factors can play an important role on the insulation properties. The blocking electrode, PSF played an important role to accumulate the charge in the interfaces. And the PVDF layer also played the other role serving as the resource of the accumulating charges. Consequently, the thicker PVDF and PSF layers will result in higher interfacial polarization than thinner PVDF and PSF layers. Because these interfacial charges can effectively trap electrons injected from the (negative) electrode under a high electric field, the volume resistivity of PSF/PVDF multilayer films with thicker PVDF/PSF layers will be higher than those with thinner PVDF/PSF layers. In order to further prove the interfacial polarization effect on insulation properties, the TSDC and dc conductivity measurement are employed. Those experiments prove the existence of interfacial charges and its effect on overall conductivity. It shows 32 layer- multilayer films have better insulation properties than 256 layer-films through three different temperatures and fields. That can be attributed to the more accumulation of interfacial polarization in 32 layer- multilayer films as 32 layer MLF has thicker blocking electrode, PC, to hold interfacial charges. And also the pre-poling experiment gave a clear illustration that interfacial charges built counter field in the layer structure which reduces the conducting current through the multilayer films. We have demonstrated that the electrical insulation and energy storage/release properties of PC/P(VDF-HFP) multilayer films and blends depended on morphology of PC/P(VDF-HFP). Generally, PC/P(VDF-HFP) multilayer films obtain the higher insulation properties compared to its blends. For multilayer films, interfacial polarization plays a vital role on the insulation properties. High interfacial polarization retarder the electron injection into the multilayer films and low electrical conductivity are resulted. On the contrary, blends have the dis-advantage of insulation properties. Because the droplet and interconnection of P(VDF-HFP) or PC can not hold the interfacial polarization. Moreover, the simple blend system has more defects inherited from the nature of non-miscible blends. Hence, the poor insulation properties are observed in the blends. 2016-01-27 English text Case Western Reserve University School of Graduate Studies / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=case1449137228 http://rave.ohiolink.edu/etdc/view?acc_num=case1449137228 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Polymers Engineering Energy Dielectrics electrical energy multilayered films coextrusion interfacial polarization internal conduction thermal stimulated discharging current broadband dielectric spectroscopy electrical displacement-field loops |
| spellingShingle |
Polymers Engineering Energy Dielectrics electrical energy multilayered films coextrusion interfacial polarization internal conduction thermal stimulated discharging current broadband dielectric spectroscopy electrical displacement-field loops Tseng, Jung-Kai Enhanced Dielectric Properties of Multilayer Capacitor Film via Interfacial Polarization |
| author |
Tseng, Jung-Kai |
| author_facet |
Tseng, Jung-Kai |
| author_sort |
Tseng, Jung-Kai |
| title |
Enhanced Dielectric Properties of Multilayer Capacitor Film via Interfacial Polarization |
| title_short |
Enhanced Dielectric Properties of Multilayer Capacitor Film via Interfacial Polarization |
| title_full |
Enhanced Dielectric Properties of Multilayer Capacitor Film via Interfacial Polarization |
| title_fullStr |
Enhanced Dielectric Properties of Multilayer Capacitor Film via Interfacial Polarization |
| title_full_unstemmed |
Enhanced Dielectric Properties of Multilayer Capacitor Film via Interfacial Polarization |
| title_sort |
enhanced dielectric properties of multilayer capacitor film via interfacial polarization |
| publisher |
Case Western Reserve University School of Graduate Studies / OhioLINK |
| publishDate |
2016 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=case1449137228 |
| work_keys_str_mv |
AT tsengjungkai enhanceddielectricpropertiesofmultilayercapacitorfilmviainterfacialpolarization |
| _version_ |
1719439239473528832 |