CN106981373A - A kind of double layer capacitor - Google Patents
A kind of double layer capacitor Download PDFInfo
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- CN106981373A CN106981373A CN201710381208.6A CN201710381208A CN106981373A CN 106981373 A CN106981373 A CN 106981373A CN 201710381208 A CN201710381208 A CN 201710381208A CN 106981373 A CN106981373 A CN 106981373A
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- negative
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/52—Separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/66—Current collectors
- H01G11/70—Current collectors characterised by their structure
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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
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 active core-shell material, wherein porous insulation body layer in porous three-dimensional network structure between plus plate current-collecting body and, be impregnated with electrolyte；The side of porous insulation body layer is filled with active material, opposite side non-viable material is filled, 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 both positive and negative polarity active material, so as 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 capacitor, in particular it relates to a kind of double layer capacity for employing 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, and it is anti-by the reversible redox of the interface between electrode and electrolyte, and/or electrode surface or inside
Electric 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, generally using carbon material as electrode, its principle is that electricity occurs with electrolyte both sides in electrode surface
The opposite excess charges of property, so that alternate generation potential difference.Therefore, if inserting 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
Lower meeting is rapid to two polar motions, and forms close charge layer, i.e. electric double layer on the surface of two electrodes respectively, what it was formed
Electric double layer is similar with the polarization charge that the dielectric in traditional capacitor is produced under electric field action, so as to produce electric capacity effect
Should, constitute a double layer capacitor.Compared with ordinary capacitor and common rechargeable batteries, it has bigger specific capacitance
Amount.It is typically directly to coat active material layer on a current collector to form positive pole and negative pole in the prior art, then in both positive and negative polarity
Between set barrier film to constitute a double layer capacitor.The double layer capacitor of this conventional structure, its active material and electrolyte
Contact area is limited, have impact on 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 during double layer capacitor develops to improve condenser capacity as far 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.
The content of the invention
In order to solve the above technical problems, the present invention will provide a kind of with compared with high specific capacitance, while having relatively low equivalent string
Join the double layer capacitor of resistance.
To reach above-mentioned purpose, the present invention is adopted 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 active core-shell material, it is characterised 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, and opposite side is negative with being located at
Negative active core-shell 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
In the hole of side and formed with plus plate current-collecting body in conductive contact, the hole of opposite side and do not set positive electrode active materials and negative active core-shell material
To form insulated part, or the side of porous insulation body layer is contacted with negative current collector, and opposite side is with being located at plus plate current-collecting body
On positive electrode active materials contact, negative active core-shell material is filled in the hole of the close negative current collector side of porous insulation body layer
And with negative current collector formation conductive contact, positive electrode active materials and negative active core-shell material are not set in the hole of opposite 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 network structure
Layer, non-woven fabrics.
According to the double layer capacitor of this aspect, wherein positive electrode active materials and negative active core-shell material are active carbon particle, carbon
Fiber, CNT.
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 active core-shell material, wherein, it is porous in porous three-dimensional network structure in porous insulation body layer,
Electrolyte is wherein impregnated with, the side of porous insulation body layer is contacted with plus plate current-collecting body, and opposite side positioned at negative current collector with connecing
Touch, positive electrode active materials are filled in the hole of the close plus plate current-collecting body side of porous insulation body layer and formed with plus plate current-collecting body
Conductive contact, negative active core-shell 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 formation conductive contact, wherein positive electrode active materials do not contact with negative active core-shell material, between formation be not provided with positive-active material
The part of material and negative active core-shell 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 network structure
Tie up layer, non-woven fabrics.
According to the double layer capacitor of the another aspect, wherein positive electrode active materials and negative active core-shell material are activated carbon
Grain, carbon fiber, CNT.
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 active core-shell material is respectively 35-40 μm.
The advantage of the invention is that：Filled by using the insulator layer of porous three-dimensional network structure, and by active material
In wherein, relative to active material layer is directly coated on a current collector in the prior art, 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 both positive and negative polarity that furthers, and then
Increase specific capacitance simultaneously reduces equivalent series resistance, while by being not provided with positive electrode active materials and negative electrode active in insulator layer
The part of material forms an insulating barrier, to avoid short circuit, serves the effect of barrier film.
Embodiment
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit is common for this area
Technical staff will be clear understanding.These embodiments are provided to be able to be best understood from the disclosure, and can
By the scope of the present invention completely convey 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 both positive and negative polarity active material, specific fill method is not limited, and can simultaneously be controlled using conventional fill method
Depth of cracking closure, for example：Barrier material first can be set to form barrier layer in porous insulation body one side opening of layer, then another
Active material is filled in side, after filling is finished, and removes barrier layer, and to form a side opening filled with active material, another side opening is not filled out
Fill the structure of active material；It can certainly directly fill, such as by the way of active material dipping, but control be should be noted that during filling
Depth processed.
Material selection for porous insulation body layer is, it is necessary to porous three-dimensional network structure, 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.
Positive pole and negative active core-shell material are not limited, and can be conventional double layer capacitor carbon-based active material, such as activity
Carbon, CNT, carbon fiber etc., but size will be adapted with the aperture of porous insulation body layer, be defined by can smoothly fill.
For the selection of above-mentioned porous insulation bulk layer thickness, thickness is too big, and positive and negative die opening can be caused excessive, be unfavorable for
The lifting of performance, thickness is too small, can be difficult to control the filling of active material, 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 difficult to control, and short circuit problem easily occurs, fill
Depth is excessively shallow, can cause both positive and negative polarity actual range farther out, does not reach the purpose for the two distance that furthers, therefore, for one side filling
The scheme of active material, porous insulation bulk layer thickness is preferably 60-80 μm, the filling of positive electrode active materials or negative active core-shell 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 active core-shell material is respectively preferably 35-40 μm.
Embodiment 1：
Aluminium foil is provided as plus plate current-collecting body and negative current collector, the active material of carbon based negative electrodes is set on negative current collector
Material；The glass layer (60 μm of thickness) of one porous three-dimensional network structure is provided, the activated carbon of positive electrode active materials will be used as
Grain is filled into the side of glass layer, control depth of cracking closure (about 45 μm), so that in the hole of the opposite side of glass layer not
Positive electrode active materials are filled, plus plate current-collecting body is located to the above-mentioned side of glass fibre, and make plus plate current-collecting body and positive-active
Materials conductive is contacted, and the negative current collector with negative active core-shell material is located at into opposite side, electrolyte is then impregnated with.
Embodiment 2：
Aluminium foil is provided as plus plate current-collecting body and negative current collector, the active material of carbon based negative electrodes is set on negative current collector
Material；The glass layer (60 μm of thickness) of one porous three-dimensional network structure is provided, the activated carbon of positive electrode active materials will be used as
Grain is filled into the side of glass layer, control depth of cracking closure (about 30 μm), so that in the hole of the opposite side of glass layer not
Positive electrode active materials are filled, plus plate current-collecting body is located to the above-mentioned side of glass fibre, and make plus plate current-collecting body and positive-active
Materials conductive is contacted, and the negative current collector with negative active core-shell material is located at into opposite side, electrolyte is then impregnated with.
Embodiment 3：
There is provided aluminium foil, there is provided the glass layer of a porous three-dimensional network structure as plus plate current-collecting body and negative current collector
(100 μm of thickness), the active carbon particle as positive electrode active materials is filled into the side of glass layer, controls depth of cracking closure
(about 35 μm), the active carbon particle as negative active core-shell material are filled into the opposite side of glass layer, 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 active core-shell material
Do not contact, it is to avoid short circuit, plus plate current-collecting body and negative current collector are then respectively arranged on glass fibre both sides, and distinguish the two
With positive electrode active materials and negative active core-shell material conductive contact, electrolyte is then impregnated with.
Following table lists the equivalent series resistance and specific capacitance of double layer capacitor prepared by embodiment 1-3, it can be seen that adopt
With the double layer capacitor of institute's limiting structure of the present invention, relatively low 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 protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Enclose and be defined.
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, negative pole
Active material, it is characterised in that porous in porous three-dimensional network 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, opposite side and the negative active core-shell 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 active core-shell material can not set conductive contact, in the hole of opposite side to form insulated part, or it is porous
The side of insulator layer is contacted with negative current collector, and opposite 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
Do not set positive electrode active materials and negative active core-shell material to form insulated part in contact, the hole of opposite side.
2. double layer capacitor as claimed in claim 1, wherein porous insulation body layer are the glass fibers of porous three-dimensional network structure
Tie up layer, non-woven fabrics.
3. double layer capacitor as claimed in claim 1, wherein positive electrode active materials and negative active core-shell material be active carbon particle,
Carbon fiber, CNT.
4. double layer capacitor as claimed 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 active core-shell 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, negative pole
Active material, wherein, it is porous in porous three-dimensional network structure in porous insulation body layer, wherein electrolyte is impregnated with, it is porous exhausted
The side of edge body layer is contacted with plus plate current-collecting body, and opposite side is contacted with positioned at negative current collector, and positive electrode active materials are filled in many
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 active core-shell material is filled out
Fill in the hole of the close negative current collector side in porous insulation body layer and form conductive contact, wherein positive pole with negative current collector
Active material is not contacted with negative active core-shell material, between formed and be not provided with the part of positive electrode active materials and negative active core-shell material,
So that the two forms insulation.
6. double layer capacitor as claimed in claim 7, wherein porous insulation body layer are the glass fibers of porous three-dimensional network structure
Tie up layer, non-woven fabrics.
7. double layer capacitor as claimed in claim 7, wherein positive electrode active materials and negative active core-shell material be active carbon particle,
Carbon fiber, CNT.
8. double layer capacitor as claimed in claim 7, wherein porous insulation bulk layer thickness are 80-100 μm, positive electrode active materials
Depth of cracking closure with negative active core-shell material is respectively 35-40 μm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710381208.6A CN106981373B (en) | 2017-05-26 | 2017-05-26 | A kind of double layer capacitor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710381208.6A CN106981373B (en) | 2017-05-26 | 2017-05-26 | A kind of double layer capacitor |
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| CN106981373A true CN106981373A (en) | 2017-07-25 |
| CN106981373B CN106981373B (en) | 2018-09-28 |
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Citations (6)
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| 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 |
| US20140170465A1 (en) * | 2004-02-06 | 2014-06-19 | Polyplus Battery Company | Protected lithium electrodes having a porous electrolyte interlayer and associated battery cells |
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2017
- 2017-05-26 CN CN201710381208.6A patent/CN106981373B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02260515A (en) * | 1989-03-31 | 1990-10-23 | Nippon Chemicon Corp | Solid capacitor and manufacture thereof |
| US20140170465A1 (en) * | 2004-02-06 | 2014-06-19 | Polyplus Battery Company | Protected lithium electrodes having a porous electrolyte interlayer and associated battery cells |
| 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 |
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