scholarly journals Toward an Improved Understanding of the Role of Dielectrics in Capacitors

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1519 ◽  
Author(s):  
Jonathan Phillips
Keyword(s):  
Dielectric Constant ◽  
Parallel Plate ◽  
Dielectric Material ◽  
Fundamental Principle ◽  
Implicit Assumption ◽  
Parallel Plate Capacitor ◽  
Plate Capacitor ◽  
Power Densities

A new fundamental principle of the theory of dielectrics in capacitors is demonstrated. That is, dielectric material in any geometry that reduces the field generated by charges on capacitor electrodes is effective in increasing capacitance. Specifically, it is shown that super dielectric material on the outer surfaces of the electrodes of a parallel plate capacitor increases dielectric constant, as well as energy and power densities, by orders of magnitude. The implicit assumption in all current capacitor theory, that the “capacitor” is only that region occupied by the electrodes and the space between them, is shown to be incorrect.

Enhanced performance of supercapacitors by constructing a “mini parallel-plate capacitor” in an electrode with high dielectric constant materials

2020 ◽  
Vol 8 (32) ◽  
pp. 16661-16668
Author(s):  
Huayao Tu ◽  
Shouzhi Wang ◽  
Hehe Jiang ◽  
Zhenyan Liang ◽  
Dong Shi ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Carbon Fiber ◽  
Parallel Plate ◽  
Sandwich Structure ◽  
High Dielectric Constant ◽  
Parallel Plate Capacitor ◽  
Plate Capacitor ◽  
Fiber Metal ◽  
High Dielectric ◽  
Mini Plate

The carbon fiber/metal oxide/metal oxynitride layer sandwich structure is constructed in the electrode to form a mini-plate capacitor. High dielectric constant metal oxides act as dielectric to increase their capacitance.

Relative complex permittivity and its dependence on frequency

2017 ◽  
Vol 14 (6) ◽  
pp. 532-537
Author(s):  
Georgios Giannoukos ◽  
Mart Min ◽  
Toomas Rang
Keyword(s):  
Dielectric Properties ◽  
Complex Permittivity ◽  
Parallel Plate ◽  
Dielectric Material ◽  
Parallel Plates ◽  
Parallel Plate Capacitor ◽  
Content Type ◽  
Dielectric Characterization ◽  
Plate Capacitor ◽  
The Way

Purpose This paper aims to give a brief overview of dielectric properties, relative complex permittivity and its dependence on frequency. The significance of different approaches to complex permittivity is also discussed. Design/methodology/approach The different mechanisms of polarization are then presented. Dielectric measurements are given, and an RC parallel-equivalent circuit is used to simulate a parallel plate capacitor, and the way in which the impedance of the circuits is affected by frequency is illustrated in their respective diagrams. The way in which dielectric properties change with time is also discussed. Findings The goal of this paper is to give an overview of the characteristics of the dielectrics and how frequency affects the relative complex permittivity and to present different approaches to and equations for the relative complex permittivity, such as that of Debye, Cole–Cole, Cole–Davidson and Havriliak–Negami. In addition, three mechanisms of polarization, namely, electronic, atomic and bipolar, are presented. The most common dielectric characterization device, a capacitor with parallel plates between which the dielectric material under study is located, is also discussed. Ohmic and dielectric losses of a non-ideal capacitor are accounted for. Furthermore, this paper studies the equivalent circuits of a non-ideal parallel plate capacitor, those being a resistor and an ideal capacitor connected either in series or in parallel. Originality/value Finally, dielectric responses to both time and to stepwise excitation are given.

Parallel Plate Capacitor at Home

2004 ◽  
Vol 42 (4) ◽  
pp. 250-250
Author(s):  
Wojciech Dindorf
Keyword(s):  
Parallel Plate ◽  
Parallel Plate Capacitor ◽  
Plate Capacitor ◽  
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