Multilayer Film Capacitors
A technology of capacitors and electrodes, which is applied in the field of multilayer film capacitors and can solve problems such as high energy density
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Embodiment 1
[0054] Example 1: Multilayer Composite Stacks with Engineered Effective Dielectric Functions
[0055] A multilayer polymer structure was designed where it aimed to have a high frequency Debye relaxation resonance frequency of about 1 GHz, a large dielectric response on the low frequency end and an overall low loss tangent.
[0056] The dielectric constant and absorption of a composite stack with an insulating pure PP layer and a conductive RTP PP w / CB layer is determined by the compositional properties of the materials used and by the layer thickness. To model the performance of the composite stack, conductance and dielectric functions were determined for unstretched neat PP and RTP PP w / CB films as described in "Dielectric Spectroscopy". Smooth curves were generated by averaging the results from several samples and extrapolating between low and high frequency data. The resulting compositional properties (real part of dielectric constant ε and conductance) of pure PP and RT...
Embodiment 2
[0058] Example 2: Coextruded multilayer capacitor structure with alternating conductive and insulating regions
[0059] Composite stacks of thin multilayers with regions of polypropylene insulator sandwiched between conductive thermoplastic layers were prepared and characterized. The stack consists of three Type A coextruded multilayers (corresponding to figure 1 Insulation layer 120 in ), each Type A coextruded multilayer comprising polypropylene grade 1024 (available as PP1024E4 from ExxonMobil, Irving, Texas, 7 sublayers of as PP1024E4)). Coextrude the conductive layer with two B-types (corresponding to figure 1 The conductive layer 150) separates the A-type stack. 80 parts by weight of RTP PP w / CB and 20 parts by weight of PRIEX 48101 (available from Addcomp Holland Private Limited) were blended together by extrusion in a 2.5 inch (1 cm) Davis-standard single screw extruder. B.V.) maleic anhydride modified ionomer PP random copolymer) to prepare the conductive layer,...
Embodiment approach 1
[0064] Embodiment 1 is a capacitor comprising:
[0065] a first electrode, a second electrode, and a composite stack disposed between the first electrode and the second electrode;
[0066] The composite stack includes:
[0067] one or more thermoplastic conductive layers;
[0068] one or more thermoplastic insulating layers disposed adjacent to the one or more thermoplastic conductive layers;
[0069] and where one or more thermoplastic conductive layers have T C The total thickness of one or more thermoplastic insulation layers has T I total thickness, and T C / T I greater than 3.
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