CN115926231A - Layered polyester-based high-energy-storage composite dielectric film and preparation method and application thereof - Google Patents
Layered polyester-based high-energy-storage composite dielectric film and preparation method and application thereof Download PDFInfo
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- 238000004146 energy storage Methods 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000002033 PVDF binder Substances 0.000 claims abstract description 62
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims abstract description 62
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims abstract description 37
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
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Abstract
The invention relates to the technical field of polymer-based energy storage dielectric materials, and provides a layered polyester-based high-energy storage composite dielectric film and a preparation method and application thereof. According to the invention, the wide-bandgap material boron nitride nanosheet and the ferroelectric polymer polyvinylidene fluoride are used for modifying the polyester film, and the obtained layered polyester-based high-energy-storage composite dielectric film has good breakdown characteristic and energy storage characteristic, high dielectric constant, excellent insulating property, high discharge energy density, charge and dischargeThe electrical cycle characteristics are good. The embodiment result shows that the dielectric constant of the layered polyester-based high-energy-storage composite dielectric film prepared by the invention is between 3.0 and 4.0, the room-temperature breakdown strength is more than 660kV/mm, and the discharge energy density reaches 8.71J/cm 3 The charge-discharge efficiency is more than 97%, and the charge-discharge cycle life is more than 10000 times. The preparation method provided by the invention has the advantages of simple flow, easy operation and low price of used equipment, and is suitable for industrial production.
Description
Technical Field
The invention relates to the technical field of polymer-based energy storage dielectric materials, in particular to a layered polyester-based high-energy storage composite dielectric film and a preparation method and application thereof.
Background
The thin film capacitor has the advantages of low loss, high tolerance field intensity, high operation reliability and the like, and is widely applied to the fields of pulse electromagnetic systems, new energy automobiles, electric power industries and the like. The biaxially stretched polypropylene BOPP film capacitor has the advantages of low loss (0.0002), good broadband stability, high insulating strength (600 kV/mm), good self-healing property and the like, and occupies a large market share. However, the lower dielectric constant (2.2 in the case of 1kHz electric field) of BOPP directly determines the lower energy storage density, so that the BOPP film capacitor occupies a larger space on the premise of satisfying the same capacitance, and this disadvantage seriously affects the popularization and application of the BOPP film capacitor in the fields of new energy automobile industry, pulse power systems and the like which have severe requirements on the size of equipment.
The polymer film with single component is difficult to simultaneously dominate in multiple indexes, so the research on the composite dielectric material becomes an important direction for preparing the material with high energy storage density. The modification treatment of the surface of the existing film is one of the feasible ideas for preparing the high-energy-storage-density polymer dielectric material in a large scale. In recent years, wangqing of Pennsylvania State university and the like transfer hexagonal boron nitride (h-BN) prepared by a chemical deposition method (CVD) to two sides of a polyetherimide PEI film to obtain a h-BN modified PEI film, so that the charge-discharge efficiency and the energy storage density of the PEI in a high-temperature environment are improved. The Li Qi et al of Qinghua university realizes the reaction of SiO by a Plasma Enhanced Chemical Vapor Deposition (PECVD) method 2 The composite film with improved performance is obtained by deposition on various films such as BOPP, PI, PEI and the like. However, the CVD treatment method has complex steps and low efficiency, and is not suitable for large-scale application. The PECVD method depends on a complex control device, the materials which can be used for deposition are limited, and certain difficulty is also existed in the aspect of realizing the large-scale modification of the polymer film; meanwhile, the comprehensive performance of the composite film needs to be further improved.
Therefore, the appropriate polymer organic film is selected and modified for large-scale application to obtain the polymer composite dielectric material with high energy storage density, and the effects of increasing the energy storage density of the capacitor and reducing the volume of the capacitor can be realized, so that the application scenes of the film capacitor are widened, and the film capacitor has important significance for saving the cost or applying in severe environments.
Disclosure of Invention
In view of the above, the invention provides a layered polyester-based high energy storage composite dielectric film, and a preparation method and application thereof. The layered polyester-based high-energy-storage composite dielectric film provided by the invention has good breakdown characteristic and energy storage characteristic, excellent comprehensive performance and simple preparation method, and is suitable for industrial production.
In order to achieve the above object, the present invention provides the following technical solutions:
a layered polyester-based high-energy-storage composite dielectric film comprises a polyester base film and a modified functional layer arranged on the surface of the polyester base film, wherein the modified functional layer comprises boron nitride nanosheets and polyvinylidene fluoride.
Preferably, the mass of the boron nitride nanosheet in the modified functional layer is 1.67-13.33% of that of the polyvinylidene fluoride.
Preferably, the thickness of the layered polyester-based high energy storage composite dielectric film is 12-14 μm; the thickness of the polyester-based film was 11.8 μm.
The invention also provides a preparation method of the layered polyester-based high energy storage composite dielectric film, which comprises the following steps:
mixing the boron nitride nanosheets, polyvinylidene fluoride and an organic solvent to obtain a mixed dispersion liquid;
and (3) casting the mixed dispersion liquid on the surface of a polyester base film to form a film, and then removing the organic solvent to obtain the layered polyester-based high-energy-storage composite medium film.
Preferably, the method for mixing the boron nitride nanosheets, the polyvinylidene fluoride and the organic solvent comprises: stirring and mixing polyvinylidene fluoride and a first part of organic solvent to obtain a polyvinylidene fluoride solution; mixing the boron nitride nanosheet with a second part of organic solvent, and performing ultrasonic dispersion to obtain a boron nitride dispersion liquid; and mixing the polyvinylidene fluoride solution and the boron nitride dispersion liquid to obtain a mixed dispersion liquid.
Preferably, the mass ratio of the polyvinylidene fluoride to the first part of the organic solvent is 1; the temperature for stirring and mixing is 50-60 ℃, and the time is 12h; the mass ratio of the boron nitride nanosheet to the second part of organic solvent is (0.01-0.08): 20; the power of the ultrasonic dispersion is 100W, and the time is 3h.
Preferably, the mixing of the polyvinylidene fluoride solution and the boron nitride dispersion liquid is carried out under the conditions of heating and stirring, the temperature of heating and stirring is 50-60 ℃, and the time is 8 hours.
Preferably, the organic solvent is N, N-dimethylformamide, tetrahydrofuran or dimethyl sulfoxide.
Preferably, the method for removing the organic solvent is heating evaporation; the heating and evaporating temperature is 70 ℃, and the time is 12h.
The invention also provides the application of the layered polyester-based high energy storage composite dielectric film prepared by the preparation method in the scheme or the application of the layered polyester-based high energy storage composite dielectric film prepared by the preparation method in a film capacitor.
The invention provides a layered polyester-based high-energy-storage composite dielectric film which comprises a polyester base film and a modified functional layer arranged on the surface of the polyester base film, wherein the modified functional layer comprises boron nitride nanosheets and polyvinylidene fluoride. According to the invention, the thermoplastic Polyester (PET) film is modified by using the wide-bandgap material Boron Nitride Nanosheet (BNNS) and the ferroelectric polymer polyvinylidene fluoride (PVDF), and the obtained layered polyester-based high-energy-storage composite dielectric film has good breakdown characteristic and energy storage characteristic, higher dielectric constant, excellent insulating property, high discharge energy density and good charge-discharge cycle characteristic, and can solve the problems of low energy storage density and low charge-discharge cycle frequency of the existing polymer dielectric medium. The embodiment result shows that the dielectric constant of the layered polyester-based high-energy-storage composite dielectric film prepared by the invention is between 3.0 and 4.0, the breakdown strength at room temperature is more than 660kV/mm, and the discharge energy density reaches 8.71J/cm 3 The charge-discharge efficiency is more than 97%, and the charge-discharge cycle life is more than 10000 times.
The invention also provides a preparation method of the layered polyester-based high energy storage composite medium film, which adopts the mixed dispersion of the boron nitride nanosheet and the polyvinylidene fluoride to form a film on the surface of the polyester base film by casting, and then removes the solvent to form the boron nitride nanosheet-polyvinylidene fluoride composite layer; the preparation method provided by the invention has the advantages of simple flow, easy operation and low price of used equipment, and is suitable for industrial production.
Drawings
FIG. 1 is a cross-sectional SEM image of a composite media film prepared in example 2;
FIG. 2 is a graph showing the relationship between the dielectric constant, dielectric loss and electric field frequency at room temperature for the PET film used in comparative example 1 and the composite dielectric films prepared in examples 1 to 4;
FIG. 3 is a graph showing the relationship between the dielectric constant, dielectric loss and temperature at 1000Hz for the PET film used in comparative example 1 and the composite dielectric films prepared in examples 1 to 4;
FIG. 4 is a Weber distribution diagram of breakdown field strength at room temperature of the PET film used in comparative example 1 and the composite dielectric films prepared in examples 1 to 4;
FIG. 5 is a graph showing the relationship between the discharge energy density and the charge-discharge efficiency at room temperature of the PET film used in comparative example 1 and the composite dielectric films prepared in examples 1 to 4, as a function of an applied electric field;
FIG. 6 is a graph of the charge-discharge cycle at room temperature of the composite dielectric film prepared in example 2 under an electric field of 200 kV/mm.
Detailed Description
The invention provides a layered polyester-based high-energy-storage composite dielectric film which comprises a polyester base film and a modified functional layer arranged on the surface of the polyester base film, wherein the modified functional layer comprises boron nitride nanosheets and polyvinylidene fluoride.
In the present invention, the mass of the boron nitride nanosheet in the modified functional layer is preferably 1.67 to 13.33%, more preferably 2 to 13%, and even more preferably 5 to 10% of the mass of the polyvinylidene fluoride.
In the invention, the thickness of the layered polyester-based high energy storage composite dielectric film is preferably 12-14 μm; the thickness of the polyester-based film is preferably 11.8 μm.
The invention also provides a preparation method of the layered polyester-based high energy storage composite dielectric film, which comprises the following steps:
mixing the boron nitride nanosheets, polyvinylidene fluoride and an organic solvent to obtain a mixed dispersion liquid;
and (3) casting the mixed dispersion liquid on the surface of a polyester base film to form a film, and then removing the organic solvent to obtain the layered polyester-based high-energy-storage composite medium film.
According to the invention, the boron nitride nanosheet, the polyvinylidene fluoride and the organic solvent are mixed to obtain the mixed dispersion liquid. In the present invention, the organic solvent is preferably N, N-dimethylformamide, tetrahydrofuran or dimethylsulfoxide; the method for mixing the boron nitride nanosheet, the polyvinylidene fluoride and the organic solvent preferably comprises: stirring and mixing polyvinylidene fluoride and a first part of organic solvent to obtain a polyvinylidene fluoride solution; mixing the boron nitride nanosheets and the second part of organic solvent, and performing ultrasonic dispersion to obtain a boron nitride dispersion liquid; mixing the polyvinylidene fluoride solution and the boron nitride dispersion liquid to obtain a mixed dispersion liquid; the mass ratio of the polyvinylidene fluoride to the first part of the organic solvent is preferably 1; the stirring and mixing temperature is preferably 50-60 ℃, the time is preferably 12 hours, in the specific embodiment of the invention, stirring is preferably carried out until the polyvinylidene fluoride is completely dissolved, and the obtained polyvinylidene fluoride solution is transparent; the mass ratio of the boron nitride nanosheet to the second part of organic solvent is preferably (0.01-0.08): 20, more preferably (0.03-0.05): 20; the power of the ultrasonic dispersion is preferably 100W (the maximum power of the ultrasonic device is preferably 300W), and the time is 3h; mixing the polyvinylidene fluoride solution and the boron nitride dispersion liquid under the heating and stirring conditions, wherein the heating and stirring temperature is preferably 50-60 ℃, and the time is preferably 8 hours; the dosage ratio of the polyvinylidene fluoride to the boron nitride is preferably calculated according to the mass fraction of the boron nitride nanosheets in the boron nitride nanosheet-polyvinylidene fluoride composite layer in the scheme.
After the mixed dispersion liquid is obtained, the mixed dispersion liquid is subjected to tape casting on the surface of a polyester base film to form a film, and then the organic solvent is removed, so that the layered polyester-based high-energy-storage composite medium film is obtained. Preferably, the polyester base film is fixed on a glass plate, and then the mixed dispersion liquid is cast on the surface of the polyester base film to form a film; the method for removing the organic solvent is preferably heating evaporation; the temperature of the heating evaporation is preferably 70 ℃, and the time is preferably 12h; and after heating and evaporation are finished, separating the obtained layered polyester-based high-energy-storage composite medium film from the glass plate.
The invention also provides the application of the layered polyester-based high energy storage composite dielectric film prepared by the preparation method in the scheme or the application of the layered polyester-based high energy storage composite dielectric film prepared by the preparation method in a film capacitor. The layered polyester-based high-energy-storage composite dielectric film provided by the invention has good breakdown property and energy storage property, higher dielectric constant, excellent insulating property, high discharge energy density, good charge-discharge cycle property and wide application prospect in the field of film capacitors; the present invention has no special requirement on the specific method for the application, and the method is well known to those skilled in the art.
The technical solutions in the present invention will be described clearly and completely with reference to the following embodiments in the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Comparative example 1
A suitably sized 11.8 μm thick PET film was placed in an oven at 70 ℃ for 12h. The PET film after the drying treatment was used as a comparative example.
Example 1
0.6g of PVDF powder is added into 12g of DMF solution and stirred for 12 hours at the temperature of 50-60 ℃ until PVDF is completely dissolved. 0.01g of BNNS powder was added to 20g of DMF solution and sonicated at 100W (300W. Times.33.3%) for 3h until the mixture was homogeneous in color. Mixing the two parts of liquid and stirring for 8 hours at the temperature of between 50 and 60 ℃ to obtain uniform dispersion liquid. And casting the dispersion liquid on a PET (polyethylene terephthalate) film fixed on a glass plate to form a film, and putting the film into an oven to be dried at 70 ℃ for 12 hours until DMF is completely evaporated to obtain a layered polyester-based high-energy-storage composite medium film with the thickness of about 12 mu m, which is marked as (BNNS-PVDF)/PET layered composite medium film, wherein the mass of BNNS in the modified functional layer is 1.67 percent of that of PVDF.
Example 2
0.6g of PVDF powder is added into 12g of DMF solution and stirred for 12 hours at the temperature of 50-60 ℃ until PVDF is completely dissolved. 0.02g of BNNS powder was added to 20g of DMF solution and sonicated at 100W (300W. Times.33.3%) for 3h until the color of the mixture was uniform. Mixing the two parts of liquid and stirring for 8 hours at the temperature of between 50 and 60 ℃ to obtain uniform dispersion liquid. And casting the dispersion liquid on a PET (polyethylene terephthalate) film fixed on a glass plate to form a film, and putting the film into an oven to be dried at 70 ℃ for 12 hours until DMF is completely evaporated to obtain a layered polyester-based high-energy-storage composite medium film with the thickness of about 12 mu m, which is marked as (BNNS-PVDF)/PET layered composite medium film, wherein the mass of BNNS in the modified functional layer is 3.33 percent of that of PVDF.
Example 3
0.6g of PVDF powder is added into 12g of DMF solution and stirred for 12 hours at the temperature of 50-60 ℃ until PVDF is completely dissolved. 0.04g of BNNS powder was added to 20g of DMF solution and sonicated at 100W (300W. Times.33.3%) for 3h until the mixture was homogeneous in color. Mixing the two parts of liquid and stirring for 8 hours at the temperature of between 50 and 60 ℃ to obtain uniform dispersion liquid. And casting the dispersion liquid on a PET (polyethylene terephthalate) film fixed on a glass plate to form a film, and putting the film into an oven to be dried at 70 ℃ for 12 hours until DMF is completely evaporated to obtain a layered polyester-based high-energy-storage composite medium film with the thickness of about 12 mu m, which is marked as (BNNS-PVDF)/PET layered composite medium film, wherein the mass of BNNS in the modified functional layer is 6.67 percent of that of PVDF.
Example 4
0.6g of PVDF powder is added into 12g of DMF solution and stirred for 12 hours at the temperature of 50-60 ℃ until PVDF is completely dissolved. 0.08g of BNNS powder was added to 20g of DMF solution and sonicated at 100W (300W. Times.33.3%) for 3h until the mixture was homogeneous in color. Mixing the two liquids, and stirring at 50-60 deg.C for 8 hr to obtain uniform dispersion. And casting the dispersion liquid on a PET (polyethylene terephthalate) film fixed on a glass plate to form a film, and putting the film into an oven to be dried at 70 ℃ for 12 hours until DMF is completely evaporated to obtain a layered polyester-based high-energy-storage composite medium film with the thickness of about 12 mu m, which is marked as (BNNS-PVDF)/PET layered composite medium film, wherein the mass of BNNS in the modified functional layer is 13.33 percent of that of PVDF.
Performance testing
FIG. 1 is a cross-sectional SEM image of a (BNNS-PVDF)/PET laminar composite media film prepared in example 2: as can be seen from FIG. 1, the composite dielectric film has a flat surface and a uniform thickness, and the modified functional layer is in good contact with the base film.
FIG. 2 is a graph showing the relationship between the dielectric constant and dielectric loss at room temperature and the frequency of an electric field for the PET film used in comparative example 1 and the laminated composite dielectric films prepared in examples 1, 2, 3 and 4, in which curve 0 represents comparative example 1 and curves 1, 2, 3 and 4 represent examples 1 to 4, respectively; the results in fig. 2 show that: the dielectric constant of the (BNNS-PVDF)/PET laminated composite dielectric film is slightly reduced along with the increase of the frequency, and the dielectric loss is increased along with the increase of the frequency. The dielectric constants of PET, example 1, example 2, example 3 and example 4 were found to be 10 by calculation 2 ～10 6 The dielectric constant of the (BNNS-PVDF)/PET laminar composite dielectric film has broadband stability, which is significant for the capacitance value stability of the film capacitor.
FIG. 3 is a graph showing the relationship between the dielectric constant and dielectric loss at 1000Hz electric field and the temperature for the PET film used in comparative example 1 and the laminated composite dielectric films prepared in examples 1, 2, 3 and 4, wherein curve 0 represents comparative example 1, and curves 1, 2, 3 and 4 represent examples 1 to 4, respectively. The results in fig. 3 show that: the dielectric constant of the (BNNS-PVDF)/PET laminar composite dielectric film changes slightly within the range of 20-100 ℃, wherein the maximum change amount is 3.5% (taking 20 ℃ as reference), and is increased within the range of 100-120 ℃. Correspondingly, the dielectric loss remains almost constant in the range of 20 to 100 ℃ and increases in the range of 100 to 120 ℃, but overall remains at a low level. This shows that the (BNNS-PVDF)/PET laminated composite medium film has good thermal stability of dielectric constant and dielectric loss in the range of 20-100 ℃.
Fig. 4 is a weber distribution diagram of the breakdown strength at room temperature of the PET film used in comparative example 1 and the layered composite dielectric films prepared in examples 1, 2, 3 and 4, wherein curve 0 represents comparative example 1, and curves 1, 2, 3 and 4 represent examples 1 to 4, respectively. The results in fig. 4 show that: the breakdown strengths of the PET film and examples 1, 2, 3 and 4 were 660kV/mm, 681kV/mm, 737kV/mm, 721kV/mm and 671kV/mm, respectively. Compared with the PET film, the breakdown strength of the composite dielectric films prepared in examples 1, 2, 3 and 4 is respectively improved by 3.2%, 11.7%, 9.2% and 1.7%, which shows that the breakdown performance of the (BNNS-PVDF)/PET laminated composite dielectric film is improved.
FIG. 5 is a graph showing the discharge energy density and the charge-discharge efficiency at room temperature as a function of an applied electric field for the PET film used in proportion 1 and the layered composite dielectric films prepared in examples 1, 2, 3, and 4, in which curve 0 represents comparative example 1, and curves 1, 2, 3, and 4 represent examples 1 to 4, respectively. The results in fig. 5 show that: the maximum discharge energy density of the PET film was 6.80J/cm 3 The maximum discharge energy density of the laminated composite dielectric films prepared in the examples 1, 2, 3 and 4 is 7.42J/cm 3 、8.71J/cm 3 、8.13J/cm 3 And 7.67J/cm 3 Respectively, the improvement is 9.1%, 28.1%, 19.6% and 12.8%. In terms of charge and discharge efficiency, the PET film and the composite dielectric films prepared in the examples 1, 2, 3 and 4 are kept at a level of more than 97% in a range from 200kV/mm to 700 kV/mm. The data show that the (BNNS-PVDF)/PET laminated composite dielectric film has excellent energy storage characteristics.
FIG. 6 is a charge-discharge cycle chart of the layered composite dielectric thin film prepared in example 2 under an electric field of 200kV/mm and at room temperature. Example 2 was chosen as a representative example and tested at room temperature at an electric field of 200 kV/mm. The results in FIG. 6 show that in example 2, the discharge energy density remains stable (about 0.63J/cm) after 10000 cycles of charge and discharge at room temperature and under the condition of 200kV/mm electric field 3 ) This indicates (BNNS-PVDF) </> based onThe PET layered composite dielectric film has excellent charge-discharge cycle stability and operation reliability, and has potential application value in the field of film capacitors.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and amendments can be made without departing from the principle of the present invention, and these modifications and amendments should also be considered as the protection scope of the present invention.
Claims (10)
1. The layered polyester-based high-energy-storage composite dielectric film is characterized by comprising a polyester base film and a modified functional layer arranged on the surface of the polyester base film, wherein the modified functional layer comprises boron nitride nanosheets and polyvinylidene fluoride.
2. The layered polyester-based high energy storage composite dielectric film as claimed in claim 1, wherein the mass of the boron nitride nanosheet in the modified functional layer is 1.67-13.33% of the mass of the polyvinylidene fluoride.
3. The layered polyester-based high energy storage composite dielectric film according to claim 1 or 2, wherein the thickness of the layered polyester-based high energy storage composite dielectric film is 12 to 14 μm; the thickness of the polyester-based film was 11.8 μm.
4. The preparation method of the layered polyester-based high energy storage composite dielectric film as claimed in any one of claims 1 to 3, characterized by comprising the following steps:
mixing boron nitride nanosheets, polyvinylidene fluoride and an organic solvent to obtain a mixed dispersion liquid;
and (3) casting the mixed dispersion liquid on the surface of a polyester base film to form a film, and then removing the organic solvent to obtain the layered polyester-based high-energy-storage composite medium film.
5. The production method according to claim 4, wherein the method of mixing boron nitride nanosheets, polyvinylidene fluoride and organic solvent comprises: stirring and mixing polyvinylidene fluoride and a first part of organic solvent to obtain a polyvinylidene fluoride solution; mixing the boron nitride nanosheet with a second part of organic solvent, and performing ultrasonic dispersion to obtain a boron nitride dispersion liquid; and mixing the polyvinylidene fluoride solution and the boron nitride dispersion liquid to obtain a mixed dispersion liquid.
6. The preparation method according to claim 5, wherein the mass ratio of the polyvinylidene fluoride to the first part of the organic solvent is 1; the temperature for stirring and mixing is 50-60 ℃, and the time is 12h; the mass ratio of the boron nitride nanosheet to the second part of organic solvent is (0.01-0.08): 20; the power of the ultrasonic dispersion is 100W, and the time is 3h.
7. The method according to claim 5, wherein the mixing of the polyvinylidene fluoride solution and the boron nitride dispersion is carried out under heating and stirring at a temperature of 50 to 60 ℃ for 8 hours.
8. The method according to claim 4, wherein the organic solvent is N, N-dimethylformamide, tetrahydrofuran or dimethylsulfoxide.
9. The production method according to claim 4 or 8, wherein the method for removing the organic solvent is evaporation by heating; the temperature of the heating evaporation is 70 ℃, and the time is 12h.
10. The use of the layered polyester-based high energy storage composite dielectric film according to any one of claims 1 to 3 or the layered polyester-based high energy storage composite dielectric film prepared by the preparation method according to any one of claims 4 to 9 in a film capacitor.
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| US20070108490A1 (en) * | 2005-11-14 | 2007-05-17 | General Electric Company | Film capacitors with improved dielectric properties |
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| CN111234424A (en) * | 2020-03-10 | 2020-06-05 | 陕西科技大学 | Flaky boron nitride/polyvinylidene fluoride composite material and preparation method thereof |
| CN111892730A (en) * | 2020-08-12 | 2020-11-06 | 南通洪明电工科技有限公司 | Method for preparing inorganic/organic composite dielectric medium ultrathin film in large scale and inorganic/organic composite dielectric medium ultrathin film |
| CN112920531A (en) * | 2021-02-18 | 2021-06-08 | 西安交通大学 | High energy storage density polymer and method for preparing same based on field arrangement |
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| US20070108490A1 (en) * | 2005-11-14 | 2007-05-17 | General Electric Company | Film capacitors with improved dielectric properties |
| CN108456324A (en) * | 2018-04-09 | 2018-08-28 | 南通洪明电工科技有限公司 | A kind of surface coating technology prepares the method and its application of high-performance inorganic/organic composite multilayer dielectric thin film |
| CN111234424A (en) * | 2020-03-10 | 2020-06-05 | 陕西科技大学 | Flaky boron nitride/polyvinylidene fluoride composite material and preparation method thereof |
| CN111892730A (en) * | 2020-08-12 | 2020-11-06 | 南通洪明电工科技有限公司 | Method for preparing inorganic/organic composite dielectric medium ultrathin film in large scale and inorganic/organic composite dielectric medium ultrathin film |
| CN112920531A (en) * | 2021-02-18 | 2021-06-08 | 西安交通大学 | High energy storage density polymer and method for preparing same based on field arrangement |
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