CN106981373B - A kind of double layer capacitor - Google Patents
A kind of double layer capacitor Download PDFInfo
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- CN106981373B CN106981373B CN201710381208.6A CN201710381208A CN106981373B CN 106981373 B CN106981373 B CN 106981373B CN 201710381208 A CN201710381208 A CN 201710381208A CN 106981373 B CN106981373 B CN 106981373B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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 present invention relates to a kind of double layer capacitor, including plus plate current-collecting body, positive electrode active materials, porous insulation body layer, negative current collector, negative electrode active material, wherein porous insulation body layer in porous three-dimensional reticular structure between plus plate current-collecting body and, be impregnated with electrolyte；The side of porous insulation body layer is filled with active material, other side non-viable material filling, or fill active material in the both sides of porous insulation body layer, centre keeps the state of non-viable material, increase the contact area of active material and electrolyte with this, further the distance of positive and negative anodes active material, to increase the specific capacitance of double layer capacitor, reduces equivalent series resistance.
Description
Technical field
The present invention relates to a kind of double layer capacitors, and in particular, to a kind of double layer capacity using porous insulation body layer
Device.
Background technology
Ultracapacitor (also be referred to as electrochemical capacitor) is that one kind being capable of massive store electric energy and with high-power
The capacitor of flash-over characteristic, is a kind of new type of energy storage device between capacitor and battery, ultracapacitor with it is traditional
Capacitor is different, it is anti-by interface between electrode and electrolyte, and/or electrode surface or the reversible redox of inside
Charge should be stored, its performance and effect are all between traditional capacitor and secondary cell.Double layer capacitor belongs to super
One kind in capacitor, for generally use carbon material as electrode, its principle is that electrode surface will appear electricity with electrolyte both sides
The opposite excess charges of property, to make alternate generation potential difference.Therefore, if being inserted into two electrodes simultaneously in the electrolytic solution, and
Apply the voltage for being less than electrolyte solution decomposition voltage, at this moment effect of the negative ions in electrolyte in electric field therebetween
Under can be rapidly to two polar motions, and form close charge layer, i.e. electric double layer on the surface of two electrodes respectively, it is formed by
Electric double layer is similar with the polarization charge that the dielectric in traditional capacitor generates under electric field action, to generate capacitance effect
It answers, constitutes a double layer capacitor.Compared with ordinary capacitor and common rechargeable batteries, it has the specific capacitance of bigger
Amount.Active material layer is typically directly coated on a current collector in the prior art to form anode and cathode, then in positive and negative anodes
Between setting diaphragm constitute a double layer capacitor.The double layer capacitor of this conventional structure, active material and electrolyte
Contact area is limited, affects the increase of its specific capacitance, and specific capacitance is an important parameter of double layer capacitor, decides electricity
The capacity of container, and it is also the hot issue faced in double layer capacitor development to improve condenser capacity as possible；In addition
Intrinsic equivalent series resistance is also a key factor for restricting double layer capacitor performance in double layer capacitor, is sought lower
Equivalent series resistance be also a problem urgently to be resolved hurrily.
Invention content
Have compared with high specific capacitance in order to solve the above technical problems, the present invention will provide one kind while there is relatively low equivalent string
Join the double layer capacitor of resistance.
In order to achieve the above objectives, the present invention adopts the following technical scheme that：
It is an aspect of the invention to provide a kind of double layer capacitor, including it is plus plate current-collecting body, positive electrode active materials, porous
Insulator layer, negative current collector, negative electrode active material, which is characterized in that porous in porous three-dimensional net in porous insulation body layer
Shape structure, wherein being impregnated with electrolyte；The side of wherein porous insulation body layer is contacted with plus plate current-collecting body, the other side with positioned at negative
Negative electrode active material contact on the collector of pole, positive electrode active materials are filled in the close plus plate current-collecting body one of porous insulation body layer
Conductive contact is formed in the hole of side and with plus plate current-collecting body, positive electrode active materials and negative electrode active material are not set in the hole of the other side
Side to form insulated part or porous insulation body layer is contacted with negative current collector, the other side be located at plus plate current-collecting body
On positive electrode active materials contact, negative electrode active material is filled in the hole of close negative current collector side of porous insulation body layer
And conductive contact is formed with negative current collector, positive electrode active materials and negative electrode active material are not set in the hole of the other side to be formed absolutely
Edge point.
According to the double layer capacitor of this aspect, wherein porous insulation body layer is the glass fibre of porous three-dimensional reticular structure
Layer, non-woven fabrics.
According to the double layer capacitor of this aspect, wherein positive electrode active materials and negative electrode active material are active carbon particle, carbon
Fiber, carbon nanotube.
According to the double layer capacitor of this aspect, wherein porous insulation bulk layer thickness is 60-80 μm, positive electrode active materials or negative
The depth of cracking closure of pole active material is 35-45 μm.
Another aspect of the present invention is to provide a kind of double layer capacitor, including plus plate current-collecting body, positive electrode active materials, porous
Insulator layer, negative current collector, negative electrode active material, wherein in porous insulation body layer it is porous be in porous three-dimensional reticular structure,
It is wherein impregnated with electrolyte, the side of porous insulation body layer is contacted with plus plate current-collecting body, and the other side connects with positioned at negative current collector
It touches, positive electrode active materials are filled in the hole of the close plus plate current-collecting body side of porous insulation body layer and are formed with plus plate current-collecting body
Conductive contact, negative electrode active material is filled in the hole of the close negative current collector side of porous insulation body layer and and negative pole currect collecting
Body forms conductive contact, and wherein positive electrode active materials do not contact with negative electrode active material, between formation be not provided with positive-active material
The part of material and negative electrode active material, so that the two forms insulation.
According to the double layer capacitor of the another aspect, wherein porous insulation body layer is the glass fibers of porous three-dimensional reticular structure
Tie up layer, non-woven fabrics.
According to the double layer capacitor of the another aspect, wherein positive electrode active materials and negative electrode active material are activated carbon
Grain, carbon fiber, carbon nanotube.
According to the double layer capacitor of the another aspect, wherein porous insulation bulk layer thickness is 80-100 μm, positive-active material
The depth of cracking closure of material and negative electrode active material is respectively 35-40 μm.
The advantage of the invention is that：It is filled by using the insulator layer of porous three-dimensional reticular structure, and by active material
In wherein, compared with the existing technology in directly coat active material layer on a current collector, active material and electrolysis can be significantly increased
The contact area of liquid, improves the specific surface area of capacitor, and it is possible thereby to actual range between the positive and negative anodes that further, in turn
Increase specific capacitance and reduce equivalent series resistance, while by being not provided with positive electrode active materials and negative electrode active in insulator layer
The part of material plays the role of diaphragm to form an insulating layer to avoid short circuit.
Specific implementation mode
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit are common for this field
Technical staff will become clear.It provides these embodiments to be to be able to be best understood from the disclosure, and can
The scope of the present invention is completely communicated to those skilled in the art.
The present invention increases the contact area with electrolyte by the way that active material is filled into porous insulation body layer, draws simultaneously
The distance of nearly positive and negative anodes active material, specific fill method do not limit, conventional fill method may be used, control simultaneously
Depth of cracking closure, such as：Barrier material can be first set in one side opening of porous insulation body layer to form barrier layer, then another
Active material is filled in side, after filling, removes barrier layer, is filled with active material to form a side opening, another side opening is not filled out
Fill the structure of active material；It can certainly directly fill, by the way of being impregnated using active material, but control be should be noted that when filling
Depth processed.
For the material selection of porous insulation body layer, porous three-dimensional reticular structure is needed, can fully accommodate active matter
In the case of matter, electrolyte also can be fully received, specific material is such as glass layer, non-woven fabrics.
Anode and negative electrode active material do not limit, and can be the double layer capacitor carbon-based active material of routine, such as activity
Carbon, carbon nanotube, carbon fiber etc., but size will be adapted with the aperture of porous insulation body layer, and being subject to smoothly to fill.
Selection for above-mentioned porous insulation bulk layer thickness, thickness is too big, and positive and negative anodes spacing can be caused excessive, be unfavorable for
The promotion of performance, thickness is too small, and the filling of active material can be made not easy to control, influence yield rate and end properties, for filling
Depth, filling is too deep to cause the part for not setting active material excessively thin, and technique is not easy to control, is susceptible to short circuit problem, fill
Depth is excessively shallow, can make positive and negative anodes actual range farther out, and the purpose for the two distance that furthers is not achieved, and therefore, unilateral side is filled
The scheme of active material, porous insulation bulk layer thickness are preferably 60-80 μm, the filling of positive electrode active materials or negative electrode active material
Depth is preferably 35-45 μm；The scheme of active material is filled for bilateral, porous insulation bulk layer thickness is preferably 80-100 μm,
The depth of cracking closure of positive electrode active materials and negative electrode active material is respectively preferably 35-40 μm.
Embodiment 1：
Aluminium foil is provided as plus plate current-collecting body and negative current collector, carbon based negative electrodes activity material is set on negative current collector
Material；The glass layer (60 μm of thickness) that one porous three-dimensional reticular structure is provided, by the activated carbon as positive electrode active materials
Grain is filled into the side of glass layer, control depth of cracking closure (about 45 μm), so that in the hole of the other side of glass layer not
Positive electrode active materials are filled, plus plate current-collecting body is set to the above-mentioned side of glass fibre, and make plus plate current-collecting body and positive-active
Materials conductive contacts, and the negative current collector with negative electrode active material is set to the other side, is then impregnated with electrolyte.
Embodiment 2：
Aluminium foil is provided as plus plate current-collecting body and negative current collector, carbon based negative electrodes activity material is set on negative current collector
Material；The glass layer (60 μm of thickness) that one porous three-dimensional reticular structure is provided, by the activated carbon as positive electrode active materials
Grain is filled into the side of glass layer, control depth of cracking closure (about 30 μm), so that in the hole of the other side of glass layer not
Positive electrode active materials are filled, plus plate current-collecting body is set to the above-mentioned side of glass fibre, and make plus plate current-collecting body and positive-active
Materials conductive contacts, and the negative current collector with negative electrode active material is set to the other side, is then impregnated with electrolyte.
Embodiment 3：
Aluminium foil is provided as plus plate current-collecting body and negative current collector, the glass layer of a porous three-dimensional reticular structure is provided
(100 μm of thickness) will be filled into the side of glass layer as the active carbon particle of positive electrode active materials, control depth of cracking closure
(about 35 μm) will be filled into the other side of glass layer as the active carbon particle of negative electrode active material, control depth of cracking closure
(about 35 μm), to form the part for being not filled with active material between, so that positive electrode active materials and negative electrode active material
It does not contact, avoids short circuit, plus plate current-collecting body and negative current collector are then respectively arranged on glass fibre both sides, and make the two respectively
With positive electrode active materials and negative electrode active material conductive contact, it is then impregnated with electrolyte.
Following table lists the equivalent series resistance and specific capacitance of double layer capacitor prepared by embodiment 1-3, it can be seen that adopts
With the double layer capacitor of institute's limiting structure of the present invention, lower equivalent series resistance and higher specific capacitance can be obtained.
| Equivalent series resistance (milliohm) | Specific capacitance (F/g) | |
| Embodiment 1 | 23 | 181 |
| Embodiment 2 | 28 | 175 |
| Embodiment 3 | 21 | 195 |
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (8)
1. a kind of double layer capacitor, including plus plate current-collecting body, positive electrode active materials, porous insulation body layer, negative current collector, cathode
Active material, which is characterized in that it is porous in porous three-dimensional reticular structure in porous insulation body layer, wherein being impregnated with electrolyte；
The side of wherein porous insulation body layer is contacted with plus plate current-collecting body, the other side and the negative electrode active material on negative current collector
Contact, positive electrode active materials be filled in the hole of the close plus plate current-collecting body side of porous insulation body layer and with the anode collection bodily form
Positive electrode active materials and negative electrode active material can not set conductive contact, in the hole of the other side to form insulated part or porous
The side of insulator layer is contacted with negative current collector, and the other side is contacted with the positive electrode active materials on plus plate current-collecting body, is born
Pole active material is filled in the hole of the close negative current collector side of porous insulation body layer and forms conduction with negative current collector
It contacts, positive electrode active materials and negative electrode active material is not set to form insulated part in the hole of the other side.
2. double layer capacitor as described in claim 1, wherein porous insulation body layer are the glass fibers of porous three-dimensional reticular structure
Tie up layer, non-woven fabrics.
3. double layer capacitor as described in claim 1, wherein positive electrode active materials and negative electrode active material be active carbon particle,
Carbon fiber, carbon nanotube.
4. double layer capacitor as described in claim 1, wherein porous insulation bulk layer thickness are 60-80 μm, positive electrode active materials
Or the depth of cracking closure of negative electrode active material is 35-45 μm.
5. a kind of double layer capacitor, including plus plate current-collecting body, positive electrode active materials, porous insulation body layer, negative current collector, cathode
Active material, wherein it is porous in porous three-dimensional reticular structure in porous insulation body layer, wherein it is impregnated with electrolyte, it is porous exhausted
The side of edge body layer is contacted with plus plate current-collecting body, and the other side is contacted with positioned at negative current collector, and positive electrode active materials are filled in more
Conductive contact is formed in the hole of the close plus plate current-collecting body side of hole insulator layer and with plus plate current-collecting body, negative electrode active material is filled out
It fills in the hole in the close negative current collector side of porous insulation body layer and forms conductive contact with negative current collector, wherein anode
Active material is not contacted with negative electrode active material, between formed and be not provided with the part of positive electrode active materials and negative electrode active material,
So that the two forms insulation.
6. double layer capacitor as claimed in claim 5, wherein porous insulation body layer are the glass fibers of porous three-dimensional reticular structure
Tie up layer, non-woven fabrics.
7. double layer capacitor as claimed in claim 5, wherein positive electrode active materials and negative electrode active material be active carbon particle,
Carbon fiber, carbon nanotube.
8. double layer capacitor as claimed in claim 5, wherein porous insulation bulk layer thickness are 80-100 μm, positive electrode active materials
Depth of cracking closure with negative electrode active material is respectively 35-40 μm.
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| CN201710381208.6A CN106981373B (en) | 2017-05-26 | 2017-05-26 | A kind of double layer capacitor |
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| CN201710381208.6A CN106981373B (en) | 2017-05-26 | 2017-05-26 | A kind of double layer capacitor |
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| CN106981373B true CN106981373B (en) | 2018-09-28 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02260515A (en) * | 1989-03-31 | 1990-10-23 | Nippon Chemicon Corp | Solid capacitor and manufacture thereof |
| CN101006595A (en) * | 2005-03-02 | 2007-07-25 | 松下电器产业株式会社 | Lithium ion secondary cell and manufacturlng method thereof |
| CN101326658A (en) * | 2005-12-06 | 2008-12-17 | Lg化学株式会社 | Organic/ inorganic composite separator having morphology gradient, manufacturing method thereof and electrochemical device containing the same |
| CN102646802A (en) * | 2004-12-22 | 2012-08-22 | Lg化学株式会社 | Organic/inorganic composite microporous separator and manufacturing method thereof, and electrochemical device |
| WO2012165624A1 (en) * | 2011-06-03 | 2012-12-06 | 富士シリシア化学株式会社 | Separator, electrochemical element, and method for manufacturing separator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9368775B2 (en) * | 2004-02-06 | 2016-06-14 | Polyplus Battery Company | Protected lithium electrodes having porous ceramic separators, including an integrated structure of porous and dense Li ion conducting garnet solid electrolyte layers |
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2017
- 2017-05-26 CN CN201710381208.6A patent/CN106981373B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02260515A (en) * | 1989-03-31 | 1990-10-23 | Nippon Chemicon Corp | Solid capacitor and manufacture thereof |
| CN102646802A (en) * | 2004-12-22 | 2012-08-22 | Lg化学株式会社 | Organic/inorganic composite microporous separator and manufacturing method thereof, and electrochemical device |
| CN101006595A (en) * | 2005-03-02 | 2007-07-25 | 松下电器产业株式会社 | Lithium ion secondary cell and manufacturlng method thereof |
| CN101326658A (en) * | 2005-12-06 | 2008-12-17 | Lg化学株式会社 | Organic/ inorganic composite separator having morphology gradient, manufacturing method thereof and electrochemical device containing the same |
| WO2012165624A1 (en) * | 2011-06-03 | 2012-12-06 | 富士シリシア化学株式会社 | Separator, electrochemical element, and method for manufacturing separator |
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Effective date of registration: 20190416 Address after: 526060 Dongli Biyu House of Hebian Kindergarten, Huanggang Town, Zhaoqing City, Guangdong Province Patentee after: Zhaoqing Yuexin Electronic Technology Co. Ltd. Address before: 315194 Kexin Building B-211-47, 655 Xueshi Road, Shounan Street, Yinzhou District, Ningbo City, Zhejiang Province Patentee before: Ningbo Zhengwei Zhi Ying Mdt InfoTech Ltd |