CN106449155A - Carbon electrode of electric double-layer capacitor and the carbon electrode's manufacturing method and electric double-layer capacitor. - Google Patents
Carbon electrode of electric double-layer capacitor and the carbon electrode's manufacturing method and electric double-layer capacitor. Download PDFInfo
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- CN106449155A CN106449155A CN201611096633.2A CN201611096633A CN106449155A CN 106449155 A CN106449155 A CN 106449155A CN 201611096633 A CN201611096633 A CN 201611096633A CN 106449155 A CN106449155 A CN 106449155A
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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
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- H01G11/34—Carbon-based characterised by carbonisation or activation of carbon
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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
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
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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
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
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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
A carbon electrode for electric double layer capacitor, which comprises a metal base foil, the first carbon electrode layer and the second electrode layer. The metal base foil has a first surface and a second surface opposite to each other and a plurality of holes are distributed on the both surfaces. The first electrode layer and the second electrode layer are arranged on the first surface and the second surface respectively. The first carbon electrode layer and the second carbon electrode layer are single-layer structure. The carbon electrode layer and the second carbon electrode layer are embedded into the hole, so that a plurality of conductive interfaces are provided between the first electrode layer and the metal base foil and between the second electrode layer and the metal base foil.
Description
Technical field
The present invention relates to double-layer capacitor, more particularly, to a kind of carbon electrode of Electric double-layer capacitor and its manufacture method and
There is the Electric double-layer capacitor of the carbon electrode of described Electric double-layer capacitor.
Background technology
Double-layer capacitor is ultracapacitor again, is a kind of novel energy storage apparatus, and it has, and the charging interval is short, use the longevity
The features such as life length, good temp characteristic, energy saving and environmental protection.Double-layer capacitor is of many uses, for example, resets as rising
The power balance power supply put, it is possible to provide the electric power of super-large current；As vehicle launch power supply, starting efficiency and reliability are all than biography
The accumulator of system is high, can completely or partially substitute traditional accumulator；The traction energy as vehicle, can produce electronic vapour
Existing trolleybus transformed by the traditional internal combustion engine of car, replacement；With the suitable of the battlebuses such as tank, panzer militarily can be ensured
Profit starts (especially in cold winter), the pulsating energy as radium-shine weapon.In addition can be additionally used in other electromechanical equipments
The energy storage energy.
Double-layer capacitor is built upon a kind of brand-new capacitor in the electric double layer theoretical basiss of interface.It is known that inserting
The surface of metal electrode entering in electrolyte solution occurs the contrary excess charges of symbol with liquid level both sides, thus producing current potential
Difference.So, if being inserted simultaneously into two electrodes in the electrolytic solution, and betwixt apply one less than electrolyte solution decomposition voltage
Voltage, at this moment the positive and negative ion in electrolyte can be rapidly to two polar motions, and respectively in two electrodes in the presence of electric field
Surface forms close charge layer, i.e. electric double layer, and the electrolyte in electric double layer and traditional capacitor that it is formed is made in electric field
Polarization charge with lower generation is similar, thus also producing capacity effect, close electric double layer is similar to plate condenser, but,
Because the distance of close charge layer gap ratio ordinary capacitor electric charge interlayer is more much smaller, thus have than ordinary capacitor more
Big capacity.
In order to strengthen the performance of double-layer capacitor, the activated carbon with extra specific surface area is often used as electric double layer
The electrode of capacitor.Although double-layer capacitor has aforementioned advantages, current active carbon electrode still has interface adhesive force
Not good, the shortcomings of interface contact impedance is too high.
Content of the invention
Therefore, the present invention provides a kind of carbon electrode of Electric double-layer capacitor, and this carbon electrode is by activated carbon electrode layers and conduction
Metal bottom paper tinsel constitute sandwich structure, conducting metal bottom paper tinsel surface hole be distributed, activated carbon electrode layers then include activated carbon,
Conductive carbon and adhesive.The present invention also provides a kind of manufacture method of the carbon electrode of Electric double-layer capacitor, specifically will by activated carbon,
Slurry made by conductive carbon and adhesive is coated on the paper tinsel of conducting metal bottom through the mode of such as coating, makes activated carbon and leads
Electrical carbon enters the hole of conducting metal bottom paper tinsel, and the hole of conducting metal bottom paper tinsel can increase the contact interface face with activated carbon electrode layers
Long-pending, and then lift interface adhesive force, reduce interface contact impedance, and improve the service life of Electric double-layer capacitor.
The present invention is achieved by the following scheme, a kind of carbon electrode of Electric double-layer capacitor, and it includes metal bottom paper tinsel, the first carbon electricity
Pole layer and the second carbon electrode layer, metal bottom paper tinsel has each other relative first surface and second surface, and first surface and second
A plurality of holes are respectively provided with surface, the first carbon electrode layer and the second carbon electrode layer are respectively arranged on described first surface and described
On two surfaces, wherein said first carbon electrode layer and described second carbon electrode layer are single layer structure, described first carbon electrode layer
Embed described hole with described second carbon electrode layer, make between described first carbon electrode layer and described metal bottom paper tinsel and described the
Between two carbon electrode layers and described metal bottom paper tinsel, there is plural conductive interface.
Preferably, described single layer structure is made up of activated carbon, conductive carbon and adhesive, and the content of described activated carbon is
100 weight portions, the content of described conductive carbon is more than 0 weight portion and no more than 30 weight portions, and the content of described adhesive is 10～
12 weight portions.
Preferably, metal bottom paper tinsel is the aluminium foil of 5 μm～30 μm of thickness, and the pore diameter range of aforementioned hole is 200nm～5 μ
m.
Preferably, adhesive is the mixture of styrene-butadiene or styrene-butadiene and politef.
Preferably, conductive carbon is the stereochemical structure being made up of acetylene carbon black.
Preferably, the specific surface area of activated carbon is 1000m2/ g～3000m2/ g, the particle size range of activated carbon be 500nm～
10μm.
Preferably, described metal bottom paper tinsel also includes the protection being directly configured on described first surface and described second surface
Layer, and described protective layer is described metal bottom paper tinsel to be carried out with phosphate coating process obtained.
The present invention also provides a kind of manufacture method of the carbon electrode of Electric double-layer capacitor, comprises the following steps：Metal bottom is provided
Paper tinsel, it has each other relative first surface and second surface, and first surface and second surface are respectively provided with multiple holes；To contain
The slurry of active carbon, conductive carbon and adhesive is coated on described first surface and described second surface, makes activated carbon and leads
Electrical carbon is respectively embedded into aforementioned hole.
Preferably, described manufacture method also comprises to carry out phosphate coating process to described metal bottom paper tinsel so that described
Protective layer is formed on one surface and described second surface.
The present invention also provides a kind of Electric double-layer capacitor, including the carbon electrode of described Electric double-layer capacitor.
Brief description
Fig. 1 is a kind of carbon electrode of the Electric double-layer capacitor according to depicted in one embodiment of the present invention.
Fig. 2 is the organigram of cylinder type Electric double-layer capacitor.
Fig. 3 is AC impedance variation tendency during high temperature ageing for the 1F Electric double-layer capacitor carbon electrode.
Specific embodiment
It is described more fully with the exemplary embodiment of the present invention hereinafter with reference to accompanying drawing；However, the present invention can be by difference
Form embody, and be not limited to embodiment set forth herein.In order to clearly be illustrated, structure shown in the drawings, chi
Very little may exaggerate；That is, accompanying drawing is not necessarily and is depicted true to scale.
As shown in figure 1, a kind of carbon electrode 100 of Electric double-layer capacitor includes metal bottom paper tinsel 102, the first carbon electrode layer 104 and
Second carbon electrode layer 106；The thickness of metal bottom paper tinsel 102 can be between 5 μm to 30 μm, and its material is not particularly limited, citing
For, aluminium foil is one of common example；Metal bottom paper tinsel 102 has each other relative first surface 102a and second surface
Multiple hole 102c are distributed with 102b, and first surface 102a and second surface 102b；Hole 102c is through chemical or electric
The modes such as chemistry, to script have smooth upper and lower surface metal bottom paper tinsel 102 corroded produced by；The corrosion of aforementioned process
Depth can reach 5 μm, and the pore diameter range of hole 102c is then between 200nm～5 μm.
First carbon electrode layer 104 is the single layer structure containing activated carbon 110, conductive carbon 120 and adhesive (sign)；The
One carbon electrode layer 104 is coated on the first surface 102a of metal bottom paper tinsel 102, and wherein activated carbon l10 and conductive carbon 120 are embedding respectively
Enter aforementioned hole 102c, make to be formed plural conductive interface between the first carbon electrode layer 104 and metal bottom paper tinsel 102.
Similarly, the second carbon electrode layer 106 is also the list containing activated carbon 110, conductive carbon 120 and adhesive (sign)
Rotating fields.Second carbon electrode layer 106 is coated on the second surface 102b of metal bottom paper tinsel 102, wherein activated carbon 110 and conductive carbon
120 are respectively embedded into aforementioned hole 102c, make to be formed plural conductive interface between the second carbon electrode layer 106 and metal bottom paper tinsel 102.
In first carbon electrode layer 104 and the second carbon electrode layer 106, contained activated carbon 110 can be commercially available prod, or can
To be with the active carbon product of any known method synthesis；The specific surface area of activated carbon 110 is 1000m2/ g～3000m2/ g, lives
Property carbon 110 particle size range be 500nm～10 μm.
In first carbon electrode layer 104 and the second carbon electrode layer 106, contained conductive carbon 120 can be the tool such as carbon black, graphite
The material with carbon element of conduction property；In the present embodiment, conductive carbon 120 is the stereochemical structure being made up of acetylene carbon black；With regard to this solid knot
For structure, its primary particle size is 10nm～100nm, and its aggregate particle size is 100nm～500nm；Conductive carbon 120 may be distributed in work
Property carbon 110 accumulation hole in, or be located at metal bottom paper tinsel 102 hole 102c in, be responsible for transmission electric field.
In first carbon electrode layer 104 and the second carbon electrode layer 106, contained adhesive is not particularly limited, as long as energy
The material of enough fixing activated carbon 110 and conductive carbon 120 all can use；In the present embodiment, adhesive is granular polyphenyl second
Alkene-butadiene rubber or the mixture of granular styrene-butadiene rubber and fibrous politef；Graininess is gathered
SBR styrene butadiene rubberses can provide adhesive force in the interface of activated carbon 110, conductive carbon 120, metal bottom paper tinsel 102；Fibrous
Activated carbon 110 and conductive carbon 120 are then fixed on wherein by politef with its network structure, and can embed metal bottom paper tinsel 102
Hole 102c, make carbon electrode layer grappling metal bottom paper tinsel 102 surface, and politef knitted dimension and had ductility, can give carbon
Electrode layer burning property, to bear Bending Deformation when winding for the carbon electrode.
In carbon electrode layer the relative scale of each composition need to depending on practical application when the composition that used appropriately adjust；Substantially
On, counted with the weight portion of activated carbon 110 for 100 parts, the weight portion of conductive carbon 120 is more than 0 and no more than 30 parts, and adhesive
Weight portion is 10～12 parts；For example, the weight portion of activated carbon 110 is 100 parts, and the weight portion of conductive carbon 120 is 20 parts, and coheres
The weight portion of agent is 10 parts, when adhesive is for the mixture of styrene-butadiene rubber and politef, both weights
Amount part can be respectively 5 parts.
In one embodiment of the invention, metal bottom paper tinsel 102 also includes directly being configured at first surface 102a and
Protective layer (not shown) on two surface 102b, and aforementioned protective layer is that metal bottom paper tinsel 102 is carried out at phosphate coating
Reason is obtained.In the present embodiment, the oxide layer of this protective layer to be one layer have electric conductivity, it can give metal bottom paper tinsel 102 foot
Enough voltage resistances, to bear the rated operational voltage of double-layer capacitor, will not occur electrochemical corrosion in charge/discharge
Phenomenon.
The present invention also proposes a kind of manufacture method of the carbon electrode of Electric double-layer capacitor, first, provides metal bottom paper tinsel 102, gold
Belong to bottom paper tinsel 102 and there is each other relative first surface 102a and second surface 102b, and first surface 102a and second surface
102b each has multiple hole 102c, and the forming method of metal bottom paper tinsel 102 and hole 102c can be identical with record above, in
This repeats no more；Then, the slurry containing activated carbon 110, conductive carbon 120 and adhesive is coated said first surface 102a
On second surface 102b, activated carbon 110 and conductive carbon 120 is made to be respectively embedded into aforementioned hole 102c；Except activated carbon 110, lead
Beyond electrical carbon 120 and adhesive, the composition of described slurry may also include the solvent in order to the aforementioned three of mix；Slurry apply coated with
Afterwards, remove solvent through drying steps, additionally can be aided with rolling processing procedure again, to improve density, the carbon electrode layer of carbon electrode layer
The adhesive strength of internal activated carbon 110 and conductive carbon 120 and the adhesive strength of carbon electrode layer and metal bottom paper tinsel 102 interface.
The present invention also proposes a kind of Electric double-layer capacitor, including the carbon electrode 100 of described Electric double-layer capacitor, except electric double layer electricity
Outside the carbon electrode 100 holding, the isolating membrane of Electric double-layer capacitor, electrolyte etc. constitution element can arbitrarily select from the prior art
Select, repeat no more in this.
Embodiment
The sandwich structure that the carbon electrode of embodiment 1 is constituted by carbon electrode layer and pitting aluminium foil, pitting aluminum foil thickness is
30 μm, its surface passes through galvanic corrosion and processes (model JCC30CB that pitting aluminium foil is produced by Nihon Chikudenki Kogyo Kabushiki Kaisha
Product) and produce pore space structure, hole diameter scope is 200nm～5 μm, and hole depth is about 5 μm；Carbon electrode thickness degree is
100 μ rn, by activated carbon, conductive carbon and adhesive, (activated carbon is middle carbon ultracapacitor activated carbon products [model ACS20], conduction
Carbon is TIMCALGraphite＆Carbon Products [model SuperPLi], adhesive is Zeon Products [model
BM400B]) constituted；Activated carbon weight portion is 100, and the weight portion of conductive carbon and adhesive is 12.By activated carbon, conductive carbon
And the slurry made by adhesive, the free aluminium foil surface in hole, in coating process, activated carbon, conductive carbon are coated on coating method
And adhesive can enter in the pore space structure of aluminium foil with slurry penetration.
Comparative example
The carbon electrode of comparative example 1 adopts bright finish aluminium foil, and aluminum foil thickness is 20 μm；The composition of carbon electrode layer and coating process side
Formula is then same as Example 1.
The carbon electrode layer of comparative example 2 adopts the bright finish aluminium foil of 20 μm of thickness, and its carbon electrode layer is multiple structure, bright finish aluminum
Paper tinsel surface is the conductive carbon layer of 0.5 μm～1 μm of thickness, and its composition is only conductive carbon and adhesive, and activated carbon layer is then coated and led
On electrical carbon layer, its composition is only activated carbon and adhesive, and activated carbon is 100 μm with the double-deck thickness of conductive carbon.
The carbon electrode of comparative example 3 adopts the pitting aluminium foil of 30 μm of thickness, and carbon electrode layer is then multiple structure；Pitting aluminium foil
Surface is the conductive carbon layer of 0.5 μm～1 μm of thickness, and its composition is only conductive carbon and adhesive, and activated carbon layer then adopts laminating side
Formula is coated in conductive carbon layer, its activated carbon layer be with politef and activated carbon through kneading mode made by thin film,
Activated carbon is also 100 μm with the double-deck thickness of conductive carbon.
Each class testing is carried out to embodiment and comparative example, is described as follows, and its result is summarized in table 1.
Adhesive strength compares
Adhesive strength is tested, and using 3M adhesive tape (model 618, wide 18mm), takes the smooth coating table in carbon electrode of length 2cm
Face, notes down the maximum loading on adhesive tape release coating surface through strain gauge, and adhesive strength is then maximum loading divided by adhesive tape width
Degree., under carbon electrode layer composition condition identical, its adhesive strength is respectively 141g/cm, 17g/cm for embodiment 1 and comparative example 1.
For adhesive strength, that embodiment 1 adopts pitting aluminium foil therefore so that interface adhesive strength between carbon electrode layer and aluminium foil
Apparently higher than the comparative example 1 using bright finish aluminium foil；Wherein, the release surface observing comparative example 1 can find exposed exiting surface aluminium foil,
Only sporadicly remain activated carbon, the conductive carbon of point-like；If observing the release surface of embodiment 1, the carbon of pitting aluminium foil surface can be found
Electrode layer still has suitable thickness it was demonstrated that pitting aluminium foil can provide higher adhesive strength really.
The electrode layer of comparative example 2 belongs to multiple structure, and conductive carbon layer is coated on bright finish aluminium foil surface, and activated carbon layer again by
It is overlying in conductive carbon layer that is to say, that coating process is carried out at twice；And comparative example 1 only takes single coating carbon electrode layer, its
Structure is made up of activated carbon, conductive carbon, adhesive；Activated carbon, the particle diameter very different of conductive carbon, its size (D50) point
Not Yue Wei 6 μm with 0.2 μm；Comparative example 2 can pass through the contact surface that the less conductive carbon of particle diameter improves conductive carbon layer and bright finish aluminium foil
Long-pending, and the High level of stereoselectivity structure of conductive carbon can make conductive carbon layer more fluffy, activated carbon layer and conductive carbon layer interface then
Permeable rolling and produce conformal, and then improve the contact area of activated carbon layer and conductive carbon layer interface；With using bright finish aluminum
Under conditions of paper tinsel, because the interface contact area of comparative example 2 multiple structure is relatively higher than comparative example 1, the adhesive strength of comparative example 2 is
32g/cm, is relatively higher than comparative example 1.
The carbon electrode layer of comparative example 2,3 belongs to multiple structure, and both are both transparent for activated carbon layer and conductive carbon layer interface
And improve adhesive strength, but the adhesive strength that the pitting aluminium foil that adopted of comparative example 3 can be strengthened and between conductive carbon layer again, than
Adhesive strength 46g/cm of relatively example 3 is essentially from the interface of activated carbon layer and conductive carbon layer.
AC impedance compares
Fig. 2 is that the construction of cylinder type Electric double-layer capacitor is illustrated；The electrolyte of Electric double-layer capacitor 300 adopts tetraethyl amine tetrafluoro
Boric acid, is dissolved in acetonitrile solvent with the weight-molality of 1M, becomes electrolyte；Positive/negative the two poles of the earth of Electric double-layer capacitor adopt identical
Carbon electrode (include activated carbon electrode layers 302 and aluminium foil 304), in the middle of positive/negative carbon electrode, folder, with release paper 306, is wound into unit
Part；The positive/negative of Electric double-layer capacitor is pressed with aluminium foil 304 with both positive and negative polarity guide pin 308, stretches out through serum cap 310；Treat unit
After part carries out being vacuum dried eliminating water, through serum cap 310, element and electrolyte are sealed in aluminum cylinder 312, and complete electricity
The making of double layer capacity 300；Ac resistance analysis are carried out with 1F Electric double-layer capacitor, ac frequency 1KHz, voltage are maintained at 2V,
Can be used for assessing the structural conductive of carbon electrode.
Embodiment 1 belongs to single layer structure with the carbon electrode of comparative example 1, because embodiment 1 adopts pitting aluminium foil, carbon electrode
Layer and the contact area of aluminium foil are relatively higher than the bright finish aluminium foil that comparative example 1 adopted so that the carbon electrode structural conductive of embodiment 1
Property relatively have an advantage, the AC impedance of embodiment 1 is less than the 379m Ω of comparative example 1 with 102m Ω.In the carbon electrode layer of embodiment 1,
Its activated carbon, conductive carbon can be respectively embedded into the hole of pitting aluminium foil different pore size, and then improve the contact with aluminium foil for the carbon electrode layer
Area is so that the structural impedance of the carbon electrode of embodiment 1 is relatively lower than comparative example 1.
Under conditions of with using bright finish aluminium foil, though to have higher attachment strong for the multiple structure of the carbon electrode of comparative example 2
Degree, right AC impedance is then slightly inferior to comparative example 1 with 418m Ω；This is because the carbon electrode layer of comparative example 1 is activated carbon, conductive carbon
Accumulation interlaced with each other forms, and conductive carbon can be uniformly embedded into the accumulation aperture position in activated carbon, and then strengthens activated carbon electrode layers
Conductive net；And the carbon electrode layer of comparative example 2 belongs to multiple structure, though conductive carbon layer can be respectively at activated carbon layer, aluminium foil
Interface improves contact area, and then no conductive carbon embeds for the accumulation hole of right activated carbon layer, and adhesive can be with when slurry drying
Solution evaporation and migrate to surface, the interface adhesive strength for multiple structure plays the role of lifting, but causes between interface
The negative effect of contact impedance.
The carbon electrode layer of comparative example 3 also belongs to multiple structure, but the AC impedance of comparative example 3 is 221m Ω, electric conductivity
Relatively better than comparative example 2；This is because comparative example 3 adopts the event of pitting aluminium foil, the conductive carbon layer interface mutually embedding with pitting aluminium foil
Contact area is relatively higher than comparative example 2 so that the activated carbon layer of comparative example 3 fits in the carbon electrode structure tool on conductive carbon layer surface
There is more sound conductive net.
Carbon electrode AC impedance difference is for the impact of Electric double-layer capacitor service life
Fig. 3 is AC impedance variation tendency during high temperature ageing for the 1F Electric double-layer capacitor carbon electrode, wherein, curve
401 is the test result of embodiment 1, and curve 403 is the test result of comparative example 3；Test condition is 65 DEG C of ambient temperature, voltage
Maintain 2.7V；Initially electrical according to 1F Electric double-layer capacitor, its AC impedance specification is 315m Ω, high temperature ageing 1344 hours
Afterwards, its AC impedance deviation ratio must not exceed 200%.
The estimation of AC impedance deviation ratio is as follows：
AC impedance deviation ratio (%)=(measuring value-normal value)/normal value * 100%
Embodiment 1 adopts pitting aluminium foil with the carbon electrode of comparative example 3, and initial AC impedance all meets<The specification of 315m Ω；
And the carbon electrode of comparative example 1,2 adopts bright finish aluminium foil, initial AC impedance has then exceeded specification；The AC impedance of carbon electrode structure
Lower, represent that charge transfer efficiency is higher, carbon electrode is less susceptible to the heat energy because impedance is converted into when charge/discharge and causes to tie
The temperature of structure rises, and contributes to slowing down the catabiosis of adhesive adhesion mechanism；High temperature ageing by embodiment 1 and comparative example 3
Test is made comparisons, in the high temperature ageing initial stage of 336 hours, a little higher than comparative example of AC impedance deviation ratio 3, right 672 of embodiment 1
After hour, the AC impedance deviation ratio of comparative example 3 is gradually higher, and the AC impedance deviation ratio of embodiment 1 tends to be steady, in
The final result of 1344 hours, embodiment 1 is respectively 316,663m Ω, AC impedance deviation ratio with the AC impedance of comparative example 3
It is respectively 0%, 110%.During 65 DEG C of accelerated ageing, embodiment 1 not only possesses low AC impedance, and its AC impedance is inclined
Rate also relatively lower than comparative example 3, in other words, compare down, the carbon electrode structure of embodiment 1 has prolongation Electric double-layer capacitor
The advantage of service life.
Table 1
Tested from above, the carbon electrode that activated carbon and conductive carbon are made in single layer structure proposed by the present invention, phase
Compared with known multiple structure carbon electrode, at least there is adhesive strength is higher, AC impedance is lower and service life is longer etc.
Advantage.
Although being explained as above to the present invention with several implementations/embodiment, however these contents and be not used to limit
The present invention processed, in persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when
Can be used for a variety of modifications and variations, therefore protection scope of the present invention is worked as and is defined depending on the defined person of appended claims.
Claims (10)
1. a kind of carbon electrode of Electric double-layer capacitor is it is characterised in that include：
Metal bottom paper tinsel, it has each other relative first surface and second surface, and described first surface and described second surface
On be respectively provided with a plurality of holes；And
First carbon electrode layer and the second carbon electrode layer are respectively arranged on described first surface and described second surface, and wherein said
One carbon electrode layer and described second carbon electrode layer are single layer structure, and described first carbon electrode layer and described second carbon electrode layer are embedding
Enter described hole, make between described first carbon electrode layer and described metal bottom paper tinsel and described second carbon electrode layer and described metal
There is between the paper tinsel of bottom plural conductive interface.
2. the carbon electrode of Electric double-layer capacitor according to claim 1 is it is characterised in that described single layer structure is by activity
Carbon, conductive carbon and adhesive composition, and the content of described activated carbon is 100 weight portions, the content of described conductive carbon is more than 0 weight
Part and no more than 30 weight portions, the content of described adhesive is 10～12 weight portions.
3. the carbon electrode of Electric double-layer capacitor according to claim 1 is it is characterised in that described metal bottom paper tinsel is 5 μm of thickness
～30 μm of aluminium foil, and the pore diameter range of described hole is 200nm～5 μm.
4. Electric double-layer capacitor according to claim 1 carbon electrode it is characterised in that described adhesive be polystyrene-
Butadiene or the mixture of styrene-butadiene and politef.
5. the carbon electrode of Electric double-layer capacitor according to claim 1 is it is characterised in that described conductive carbon is by acetylene carbon black
The stereochemical structure of composition.
6. the carbon electrode of Electric double-layer capacitor according to claim 1 is it is characterised in that the specific surface area of described activated carbon is
1000m2/ g～3000m2/ g, and the particle size range of described activated carbon is 500nm～10 μm.
7. the carbon electrode of Electric double-layer capacitor according to claim 1 is it is characterised in that described metal bottom paper tinsel also includes directly
It is configured at the protective layer on described first surface and described second surface, and described protective layer is to carry out phosphorus to described metal bottom paper tinsel
Hydrochlorate epithelium processes and is obtained.
8. a kind of manufacture method of the carbon electrode of Electric double-layer capacitor is it is characterised in that include：
There is provided a metal bottom paper tinsel, it has each other relative first surface and second surface, and described first surface and described
Two surfaces each have multiple holes；And
Slurry containing activated carbon, conductive carbon and adhesive is coated on described first surface and described second surface, makes institute
State activated carbon and described conductive carbon is respectively embedded into described hole.
9. the manufacture method of the carbon electrode of Electric double-layer capacitor according to claim 8 is it is characterised in that also comprise to described
Metal bottom paper tinsel carries out phosphate coating process so that forming protective layer on described first surface and described second surface.
10. a kind of Electric double-layer capacitor is it is characterised in that include the carbon electricity of the arbitrary described Electric double-layer capacitor of claim 1 to 7
Pole.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108630896A (en) * | 2017-03-24 | 2018-10-09 | 深圳中科瑞能实业有限公司 | A kind of secondary battery negative pole and preparation method thereof and secondary cell |
| US11189835B2 (en) | 2017-03-24 | 2021-11-30 | Real Power Industrial Limited Company | Anode for secondary battery, preparation method thereof and secondary battery |
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| CN1868014A (en) * | 2003-10-17 | 2006-11-22 | 新日本石油株式会社 | Electric double layer capacitor, activated carbon for its electrode, and its manufacturing method |
| JP2010087302A (en) * | 2008-09-30 | 2010-04-15 | Nippon Chemicon Corp | Electrode for electric double-layer capacitor, and method of manufacturing the same |
| TW201543513A (en) * | 2015-08-03 | 2015-11-16 | China Steel Corp | Carbon electrode for electric double layer capacitor, fabrication method thereof, and electric double layer capacitor |
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2016
- 2016-12-02 CN CN201611096633.2A patent/CN106449155A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1868014A (en) * | 2003-10-17 | 2006-11-22 | 新日本石油株式会社 | Electric double layer capacitor, activated carbon for its electrode, and its manufacturing method |
| JP2010087302A (en) * | 2008-09-30 | 2010-04-15 | Nippon Chemicon Corp | Electrode for electric double-layer capacitor, and method of manufacturing the same |
| TW201543513A (en) * | 2015-08-03 | 2015-11-16 | China Steel Corp | Carbon electrode for electric double layer capacitor, fabrication method thereof, and electric double layer capacitor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108630896A (en) * | 2017-03-24 | 2018-10-09 | 深圳中科瑞能实业有限公司 | A kind of secondary battery negative pole and preparation method thereof and secondary cell |
| US11189835B2 (en) | 2017-03-24 | 2021-11-30 | Real Power Industrial Limited Company | Anode for secondary battery, preparation method thereof and secondary battery |
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