High electric energy density polymer capacitors with fast discharge speed and high efficiency based on unique poly(vinylidene fluoride) copolymers and terpolymers as dielectric materials

A technology of terpolymers and copolymers, applied in the direction of capacitors, fixed capacitors, fixed capacitor dielectrics, etc., can solve problems such as no teaching

Inactive Publication Date: 2009-01-28
PENN STATE RES FOUND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the prior art does not teach how to control this polarity change to achieve the highest energy densities (>20 J / cm2) allowed by this class of polymers. 3 )

Method used

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  • High electric energy density polymer capacitors with fast discharge speed and high efficiency based on unique poly(vinylidene fluoride) copolymers and terpolymers as dielectric materials
  • High electric energy density polymer capacitors with fast discharge speed and high efficiency based on unique poly(vinylidene fluoride) copolymers and terpolymers as dielectric materials
  • High electric energy density polymer capacitors with fast discharge speed and high efficiency based on unique poly(vinylidene fluoride) copolymers and terpolymers as dielectric materials

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Embodiment Construction

[0032] The present invention provides a device, such as a capacitor, for storing, and / or controlling, and / or manipulating charge and / or electrical energy, with a polymer film as dielectric layer.

[0033] The polymer film can be selected from P(VDF-CTFE), P(VDF-CFE), P(VDF-HFP), P(VDF-CDFE), P(VDF-TrFE-CTFE), P(VDF-TrFE -CFE), P(VDF-TrFE-HFP), P(VDF-TrFE-CDFE), P(VDF-TFE-CTFE), P(VDF-TFE-CFE), P(VDF-TFE-HFP), P Terpolymer or copolymer of (VDF-TFE-CDFE), wherein:

[0034] CTFE: Chlorotrifluoroethylene

[0035] CFE: Chlorofluoroethylene

[0036] HFP: Hexafluoropropylene

[0037] CDFE: Chlorodifluoroethylene

[0038] TrFE: Trifluoroethylene; and

[0039] TFE: Tetrafluoroethylene

[0040] The mol% of CTFE, or CFE, or HFP, or CDFE in the copolymer and terpolymer is within 0 mol% to 10 mol%.

[0041] The mol% of TrFE or TFE in the terpolymer is in the range of 0 mol% to 15 mol%.

[0042] Also provided are polymer blends of PVDF homopolymers and copolymers selected from the g...

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Abstract

An improved charge or energy storage device having a dielectric charge or energy storage layer including: (i) a copolymer or terpolymer selected from P(VDF-CTFE), P(VDF-CFE), P(VDF-HFP)1 P(VDF-CDFE), P(VDF-TrFE-CTFE), P(VDF- TrFE-CFE), P(VDF-TrFE-HFP)1 P(VDF-TrFE-CDFE)1 P(VDF-TFE-CTFE), P(VDF-TFE-CFE), P(VDF-TFE-HFP), and P(VDF-TFE-CDFE); or (ii) a polymer blend of PVDF homopolymer with a copolymer selected from P(VDF-CTFE); P(VDF-CFE); P(VDF-HFP); and P(VDF- CDFE); or (iii) a polymer blend of a PVDF homopolymer with a terpolymer selected from P(VDF-TrFE-CTFE); P(VDF-TrFE-CFE); P(VDF-TrFE-HFP); P(VDF-TrFE-CDFE); P(VDF-TFE-CTFE); P(VDF-TFE-CFE); P(VDF-TFE- HFP); and P(VDF-TFE-CDFE); or (iv) a polymer blend of copolymer selected from P(VDF-CTFE); P(VDF-CFE); P(VDF-HFP); and P(VDF-CDFE); with a terpolymer selected from P(VDF-TrFE-CTFE); P(VDF-TrFE-CFE); P(VDF-TrFE-HFP); P(VDF- TrFE-CDFE); P(VDF-TFE-CTFE); P(VDF-TFE-CFE); P(VDF-TFE-HFP); and P(VDF-TFE-CDFE).

Description

technical field [0001] The present invention generally relates to high energy density polymer capacitors with fast discharge rates and high efficiencies. More specifically, the present invention relates to high energy density polymer capacitors based on a unique group of PVDFs based on copolymers and terpolymers. Background technique [0002] Commercial and consumer demands for smaller and more reliable electrical and electronic systems such as hybrid electric vehicles and defibrillators have increased significantly over the past few decades. As a result, the development of high energy and power density capacitor technology has become a major viable technology. [0003] For a typical parallel plate capacitor, the capacitance C is: [0004] C=Kε 0 A / t (1) [0005] where K is the dielectric constant (relative permittivity), A is the area and t is the thickness of the capacitor, and ∈ 0 is a constant (vacuum dielectric constant, and = 8.85×10 -12 F / m). [0006] For linea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/18
CPCY02T10/7022H01G4/186Y02T10/70H01G4/18C08L27/16
Inventor 章启明初宝进周鑫吕英莹王庆B·尼斯
Owner PENN STATE RES FOUND
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