# US 2021/0280371 A1 · Multilayered dielectric composites for high temperature applications

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- Number: US 2021/0280371 A1
- Document ID: US20210280371A1
- Status: Published application
- Kind: A1
- Application number: 16/320,919
- Filed: 2017-07-25
- Published: 2021-09-09
- Earliest claimed: 2016-07-27
- Assignees: The Penn State Research Foundation
- Applicants: The Penn State Research Foundation
- Inventors: Qing Wang; Qi Li
- Web page: https://patentgrep.com/patent/US20210280371A1

## CPC

- B32B 17/10: of synthetic resin
- H01G 4/1209: {characterised by the ceramic dielectric material (H01G4/1272, H01G4/1281 take precedence)}
- C08K 3/20: Oxides; Hydroxides {(graphene oxides C08K3/042)}
- C08K 3/28: Nitrogen-containing compounds
- C08K 3/38: Boron-containing compounds
- C08L 83/14: in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms (C08L83/10 takes precedence)
- H01G 4/1227: {based on alkaline earth titanates}
- H01G 4/14: Organic dielectrics
- H01G 4/18: of synthetic material, e.g. derivatives of cellulose (H01G4/16 takes precedence)
- H01G 4/20: using combinations of dielectrics from more than one of groups H01G4/02 - H01G4/06 (H01G4/12 takes precedence)
- H01G 4/206: {inorganic and synthetic material}
- C08K 2003/385: {Binary compounds of nitrogen with boron}
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

The present document relates to multilayered dielectric composites for high-temperature applications and related methods.

## Claims

### Claim 1

A composition comprising:
a first layer comprising a polymer and an insulating inorganic filler;
a second layer comprising the polymer and a polarizing inorganic filler; and
a third layer comprising a same or substantially similar composition to the first layer or the second layer;
wherein the polymer has a glass transition temperature or a degradation temperature of about or greater than about 150° C.; and
wherein the composition has a discharged energy density of about or greater than 0.6 J cm−3, a charge-discharge efficiency of about or greater than 75%, and a dielectric constant of about or greater than 4, over a temperature range of about 20° C. to about 150° C. and with an applied alternating electric field having a frequency ranging from about 100 Hz to about 1 MHz, and a maximum operating electric field strength of at least 200 megavolt per meter.

### Claim 2 (depends on 1)

The composition of claim 1, wherein the third layer comprises a same or substantially similar composition to the first layer, and the first and third layers are outer layers and the second layer is an inner layer disposed therebetween.

### Claim 3 (depends on 1)

The composition of claim 1, wherein the third layer comprises a same or substantially similar composition to the second layer, and wherein the second layer and third layers are outer layers and the first layer is an inner layer disposed therebetween.

### Claim 4 (depends on 1)

The composition of claim 1, wherein the insulating inorganic filler is selected from the group consisting of boron nitride, silica, clay, alumina, aluminium nitride, diamond, and combinations thereof.

### Claim 5 (depends on 1)

The composition of claim 1, wherein the insulating inorganic filler comprises boron nitride.

### Claim 6 (depends on 1)

The composition of claim 1, wherein the polarizing inorganic filler is selected from the group consisting of zirconium dioxide, aluminium oxide, tantalum pentoxide, barium strontium titanate (“BST”), lead zirconate titanate (“PZT”), lead magnesium niobate-lead titanate (“PMN-PT”), and combinations thereof.

### Claim 7 (depends on 1)

The composition of claim 1, wherein the polarizing inorganic filler comprises barium titanate.

### Claim 8 (depends on 1)

The composition of any one of claim 1, wherein the polymer is a crosslinked polymer, and where the crosslinked polymer comprises an epoxy, an unsaturated polyester, a polyimide, a bismaleimide polymer, a bismaleimide triazine polymer, a cyanate ester polymer, a benzoxazine polymer, a benzocyclobutene polymer, a polyalkyd, a phenol-formaldehyde polymer, a novolac, a resole, a melamine-formaldehyde polymer, a urea-formaldehyde polymer, a hydroxymethylfuran, an unsaturated polyesterimide or combinations thereof.

### Claim 9 (depends on 1)

The composite of claim 1, wherein the polymer comprises crosslinked divinyltetramethyldisiloxane-bis(benzocyclobutene).

### Claim 10 (depends on 1)

The composite of claim 1, wherein the polymer comprises the following structure:

### Claim 11 (depends on 1)

The composition of claim 1, wherein the polymer has a dielectric constant of greater than 2.5 over a temperature range of about 20° C. to about 150° C.

### Claim 12 (depends on 1)

The composition of claim 1, wherein the polymer has an energy density of greater than 0.5 J cm-1 over a temperature range of about 20° C. to about 150° C.

### Claim 13 (depends on 1)

The composition of claim 1, wherein the polymer has a charge-discharge efficiency of greater than 80% over a temperature range of about 20° C. to about 150° C.

### Claim 14 (depends on 1)

The composition of claim 1, wherein the composite is a three-layered structure.

### Claim 15 (depends on 1)

The composition of claim 1, wherein the first layer, the second layer, the third layer, or two or more thereof, each includes a thickness of about 8 microns to about 20 microns.

### Claim 16 (depends on 1)

The composite of claim 1, wherein the first layer, the second layer, the third layer, or two or more thereof, each includes a thickness less than 20 microns.

### Claim 17 (depends on 1)

The composite of claim 1, wherein the first layer comprises the insulating filler in a volume fraction ranging from about 1 to 25 vol. %.

### Claim 18 (depends on 1)

The composite of claim 1, wherein the second layer comprises the polarizing filler in a volume fraction ranging from about 10 to about 35 vol. %.

### Claim 19 (depends on 1)

The composite of claim 1, wherein the second layer comprises the polarizing filler in a volume fraction ranging from about 20 to about 30 vol. %.

### Claim 20 (depends on 1)

An article comprising a film, wherein the film comprises the composition of claim 1.

### Claim 21 (depends on 1)

An article comprising a capacitor, wherein the capacitor comprises the composition of claim 1.

### Claim 22 (depends on 21)

The article of claim 21, wherein the capacitor is an electric vehicle capacitor.