CN101027736A - Capacitor electrode member, its manufacturing method and capacitor with same - Google Patents
Capacitor electrode member, its manufacturing method and capacitor with same Download PDFInfo
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- CN101027736A CN101027736A CN200580032663.0A CN200580032663A CN101027736A CN 101027736 A CN101027736 A CN 101027736A CN 200580032663 A CN200580032663 A CN 200580032663A CN 101027736 A CN101027736 A CN 101027736A
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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 invention provides a capacitor electrode member in which layers constituting the electrode member are highly adhesive. The capacitor electrode member comprises aluminum material (1), a carbon-containing layer (2) formed on the surface of the aluminum material (1), and further an interposition layer (3) containing an aluminum element and a carbon element, the interposition layer being formed between the aluminum material (1) and the carbon-containing layer (2). The interposition layer (3) constitutes a first surface portion which is formed on at least a part of the region of the surface of the aluminum material (1) and contains a carbide of aluminum. The carbon-containing layer (2) constitutes a second surface portion (21) formed so as to extend outward from the first surface portion (3). The carbon-containing layer (2) further contains carbon particles (22) and the second surface portion (21) is formed between the first surface portion (3) and the carbon particles (22) and contains a carbide of aluminum.
Description
Technical field
The present invention relates to general solid electrolytic capacitor electrode member, double-layer capacitor is with capacitor electrode member and manufacture methods thereof such as electrode members, and the capacitor that possesses this electrode member, particularly relate to aluminium sheet or aluminium foil used and be base material, and functional high-polymer used to the solid electrolytic capacitor of solid electrolyte with electrode member and manufacture method thereof, and the solid electrolytic capacitor that uses this solid electrolytic capacitor usefulness electrode member, perhaps aluminium sheet or aluminium foil are used to the double-layer capacitor of base material with electrode member and manufacture method thereof, and use the double-layer capacitor of this double-layer capacitor with electrode member.
Background technology
For generally partly waiting a kind of electrolytic capacitor in the place use capacitor, thirst for small-sized and high-capacitance strongly at the CPU peripheral circuit of the secondary circuit part of power circuit or PC.In addition, this kind electrolytic capacitor also requires to change in response to the low ESR (equivalent series resistance) of high frequency.Use solid electrolytic capacitor as solid electrolyte for reaching the low ESRization of this kind, just have the functional high-polymer of developing high conductivity, and reached practicability, the demand to the polymeric solid electrolytic capacitor promotes just gradually simultaneously.
Existing solid electrolytic capacitor quantizes for reaching high capacitance, just has and adopts the structure that enlarges electrode surface area.The solid electrolytic capacitor of reaching this requirement be configured with employing such as: the cylinder type of the single continuous electrode of reeling or lamination the stack-up type of multi-disc electrode.
For example the Japan Patent spy opens clear 59-108311 communique (patent documentation 1) just the structure of announcement stack-up type solid electrolytic capacitor with electrode, with the paper tinsel shape aluminium flake multi-disc lamination that forms set shape and amass through the etching enlarged surface, and implement crimping and constitute the aluminium foil laminate, in the aluminium foil laminate, be equipped with and be through to many following grooves from above.
The cylinder type solid electrolytic capacitor is that anode uses aluminium sheet or aluminium foil or aluminum etched plate or the aluminium etched foil through giving dielectric substance layer, and the negative electrode electric conductor then uses aluminium foil or aluminium etched foil.The stack-up type solid electrolytic capacitor is that anode uses aluminium sheet or aluminium foil or aluminum etched plate or the aluminium etched foil through giving dielectric substance layer, and the negative electrode electric conductor then uses graphite to stick with paste layer and silver is stuck with paste layer.
The part of essence performance cathodic process is a dielectric substrate.For can realize low ESRization in solid electrolytic capacitor, this dielectric substrate material just uses the functional high-polymer of high conductivity.For example select to constitute electroconductive polymer compound in the cohort from polypyrrole, polyaniline, polythiophene, poly-furans and these dielectric mediums, particularly under the purpose of low ESRization, can use as: polypyrrole, polyaniline, gather ethylidene dioxy thiophene etc.
Yet, the employed aluminium foil of negative electrode electric conductor or the aluminium etched foil of cylinder type solid electrolytic capacitor, its surface will form firm oxide film thereon, thereby will have and dielectric substrate between the problem that increases of the resistance value (sheet resistance value) at interface.The increase of this sheet resistance value will form obstacle aspect the low ESRization of cylinder type solid electrolytic capacitor.
On the other hand, quantize for realizing miniaturization and high capacitance, solid electrolytic capacitor just must increase the surface area of anode and negative electrode electric conductor per unit projected area.
For example for realizing that miniaturization and high capacitance quantize, the Japan Patent spy opens in the 2002-367867 communique (patent documentation 2) just motion solid electrolytic capacitor electrode member, be by: by the valve metals paper tinsel system anode bodies that arbitrary thing constituted in the tantalum of purity more than 99%, niobium, the aluminium; And formed valve metals powder system electrode layer on this anode bodies; Constitute.
Moreover, quantizing for realizing miniaturization and high capacitance, the Japan Patent spy opens 2003-272958 communique (patent documentation 3) just motion solid electrolytic capacitor electrode member, is by the low melting point valve metals paper tinsel that is made of the niobium paper tinsel; And use fusing point to be higher than valve metals that tantalum constitutes or its alloy powder of valve metals paper tinsel, and be formed at the electrode layer on the above-mentioned valve metals paper tinsel; Constitute.
Yet these electrode members will be because of the connecting airtight property suspicion deficiency between anode bodies and electrode layer, and its restriction is being arranged aspect the surface area that increases the per unit projected area, thereby and can't be corresponding small-sized and requirement that high capacitance quantizes.
But the employed electrode of a kind of double-layer capacitor in the capacitor is the electrode layer that mixes together by activated carbon, carbon dust and binding agent, coats on the collector body and forms.Collector body generally is to use such as the metallic plate or the metal forming of aluminium, copper, stainless steel etc.
For obtaining the bigger double-layer capacitor of static capacity, just must be by on the collector body surface, forming thicker electrode layer, to increase the contact area between polarizing electrode and electrolyte.Yet,, will have the problem of the active material specific volume reduction of the existing active material capacity of per unit weight in the electrode layer to take place if increase electrode layers thickness.
Also have, if increase electrode layers thickness, just with generating electrodes layer inside or electrode layer, and collector body between connecting airtight property reduction problem at the interface.
Moreover if increase electrode layers thickness, the sheet resistance value of electrode increases, and causes the problem of ESR (equivalent series resistance) raising of double-layer capacitor to take place.ESR as if double-layer capacitor improves, and just quite difficult formation hybrid battery electrical automobile is exported double-layer capacitor with employed height such as power supplys.
The method that improves the active material specific volume has the discussion the whole bag of tricks though be correlated with, but because finally be active material can be fixed just to use binding agent in existing technology, thereby limit restriction is just being arranged aspect the raising of active material specific volume.In addition, reduce binder amount if improve the active material specific volume, particularly when making the electrode of the cylinder type double-layer capacitor that needs high power capacity etc., electrode layer is easier to take place to chap or the fracture situation.Thereby the quite difficult active material specific volume that promotes double-layer capacitor.
The method that improves the connecting airtight property between electrode layer and collector body also has various discussions.
The double-layer capacitor electrode that in Japanese patent laid-open 10-223487 communique (patent documentation 4), is disclosed, be on the metal forming single face that the execution etch processes is crossed, to be coated with the polarizability electrode material, prolong into 80～90% of original thickness and again thickness is rolled after the formation polarizability electrode layer on the surface.
Open the electrode manufacturing method of the double-layer capacitor that is disclosed in the 2000-348987 communique (patent documentation 5) the Japan Patent spy, be with the flexible metal paper tinsel, with the activated carbon fiber cloth that fibrous activated carbon is formed the cloth shape, overlap mutually and push, just form the thing of two layers of electrode material of set thickness with metal foil layer and activated carbon layer; It is characterized by, after above-mentioned metal forming and above-mentioned activated carbon fiber cloth were overlapped, the pressure plare that will be provided with a plurality of projections again was connected to above-mentioned metal forming side and pushes, so that this projection is clamp-oned in above-mentioned activated carbon fiber cloth inside across above-mentioned metal forming.
Open the manufacture method that the double-layer capacitor that is disclosed in the 2002-175050 communique (patent documentation 6) is used electrode body the Japan Patent spy, be that the metal current collector paper tinsel forms on the single face at least and contains carbonaceous material combines the electrode layer of material with the 1st thing, it is characterized in that including following steps A～D.Wherein, steps A is at the metal current collector paper tinsel at least on the single face, has been coated with to contain electroconductive powder, the 2nd step in conjunction with the conductive adhesive of material and solvent; Step B implements drying with the metal current collector paper tinsel that is coated with above-mentioned conductive adhesive, and one of them part of above-mentioned solvent is removed, to form the step of conductivity adhesive layer; Step C produces to contain above-mentioned carbonaceous material combines the sheet-like formed body of material with the above-mentioned the 1st step; Step D be with above-mentioned sheet-like formed body mounting on above-mentioned conductivity adhesive layer, and form the laminate of above-mentioned metal current collector paper tinsel and above-mentioned sheet-like formed body, by being implemented to roll, prolongs this laminate again, and make the thickness of above-mentioned sheet-like formed body reduce 5～60%, just form step by electrode layer that above-mentioned sheet-like formed body constitutes.
Moreover, open the manufacture method that the double-layer capacitor that is disclosed in the 2004-186194 communique (patent documentation 7) is used the electrode moon the Japan Patent spy, be to implement from containing the moulding material of carbonaceous powder, conductive auxiliary agent and binding agent, be made into the rectangular pellet electrode of set thickness, and then above-mentioned pellet electrode fitted in the thing of the lip-deep lamination step of rectangular conductive foil across conductive adhesive; It is characterized by,, implement coating on above-mentioned conductive foil surface according to the thickness below the 10 μ m, Yi Bian above-mentioned pellet electrode is fitted Yi Bian above-mentioned lamination step is to use the intaglio plate coating machine with above-mentioned conductive adhesive.
Yet, Japanese patent laid-open 10-223487 communique (patent documentation 4) or Japan specially-double-layer capacitor electrode that Li Tekai 2000-348987 communique (patent documentation 5) is disclosed, when the metal forming of collector body and electrode layer are connected airtight, the two will have oxide or hydroxide at the interface, and will be quite difficult that collector body and electrode layer is integrated.
Moreover, open 2002-175950 communique (patent documentation 6) or Japan Patent spy according to the Japan Patent spy and open double-layer capacitor that 2004-186194 communique (patent documentation 7) institute revealing method makes with electrode body or double-layer capacitor electrode slice, can't avoid belonging to the existence of the conductive adhesive of adhesive, thereby quite difficultly form collector body and electrode layer integrated.
Thereby, when double-layer capacitor is implemented charge or discharge, the situation of generating electrodes layer peeling phenomenon from the collector body will be arranged.As a result, the problem that the charge-discharge characteristic, life-span etc. of double-layer capacitor reduce just will appear.
Patent documentation 1: the spy opens clear 59-108311 communique
Patent documentation 2: the spy opens the 2002-367867 communique
Patent documentation 3: the spy opens the 2003-272958 communique
Patent documentation 4: the spy opens flat 10-223487 communique
Patent documentation 5: the spy opens the 2000-348987 communique
Patent documentation 6: the spy opens the 2002-175950 communique
Patent documentation 7: the spy opens the 2004-186194 communique
Summary of the invention
(problem that invention institute desire solves)
The present invention desires to deal with problems at this brief description, the object of the present invention is to provide the higher capacitor electrode member of connecting airtight the property a kind of and interlayer that constitutes this electrode member.
Specific, at the employed electrode member of a kind of solid electrolytic capacitor that belongs in the capacitor, purpose of the present invention just provides the objective device electrode member of solid electrolytic electricity that a kind of sheet resistance value is lower, can reach low ESRization for addressing the above problem.
Also have, another object of the present invention is to provide a kind of surface area that enlarges electrode per unit projected area, can reach the solid electrolytic capacitor electrode member that high capacitance quantizes.
Moreover, another object of the present invention is to provide a kind of low ESRization and the manufacture method of the electric tame device of the solid electrolytic of high capacitance quantification reached with electrode member.
Another purpose more of the present invention is to provide a kind of use can reach the solid electrolytic capacitor of the solid electrolytic capacitor of low ESRization and high capacitance quantification with electrode member
Specific, at the employed electrode member of a kind of double-layer capacitor that belongs in the capacitor, the objective of the invention is to for addressing the above problem, just provide the connecting airtight property between a kind of electrode layer and collector body higher double-layer capacitor electrode member.
Also have, the double-layer capacitor electrode member that provides a kind of sheet resistance value lower is provided.
The double-layer capacitor electrode member that provides a kind of active material specific volume higher is provided another purpose more of the present invention.
Moreover another purpose more of the present invention is to provide that the connecting airtight property between a kind of electrode layer and collector body is higher, sheet resistance value is lower, and the higher double-layer capacitor of active material specific volume is with the manufacture method of electrode member.
Another purpose more of the present invention is to provide a kind of and uses that connecting airtight property between electrode layer and collector body is higher, sheet resistance value is lower, and the higher double-layer capacitor of active material specific volume is with the double-layer capacitor of electrode member.
The means of dealing with problems
Present inventors etc. adhere to after the carbonaceous material aluminium for solving the prior art problem through deeply studying intensively, found that, implement the capacitor electrode member that heating just can obtain to reach above-mentioned purpose according to specified conditions again.Satisfy with this kind inventor's etc. discovery and finish the present invention.
Capacitor electrode member according to the present invention is to possess: aluminium; And formed carbon-containing bed on this aluminium surface, also possess: be formed at this aluminium and carbon-containing bed between, and contain the medium layer of aluminium element and carbon.
When capacitor electrode member according to the present invention uses when belonging to the electrode member of a kind of solid electrolytic capacitor in the capacitor, aluminium with carbon-containing bed between formed medium layer, with the effect of performance raising aluminium and carbon-containing bed 's connecting airtight property.So the just unlikely increase resistance in electrode member inside can not hinder and low ESRization.Also has the carbon-containing bed effect that will bring into play expansion or increase the aluminium surface area.So use electrode member of the present invention, miniaturization and the high capacitance that just can reach solid electrolytic capacitor quantize.
Also have, when capacitor electrode member according to the present invention uses when belonging to the electrode member of a kind of double-layer capacitor in the capacitor, aluminium with carbon-containing bed between formed medium layer, with the effect of performance raising aluminium and carbon-containing bed 's connecting airtight property.So, electrode layer carbon-containing bed, and the aluminium of collector body between resistance at the interface just can not increase, and sheet resistance value is lower, thereby uses double-layer capacitor electrode member of the present invention, just can constitute high output double-layer capacitor.
Moreover, because double-layer capacitor of the present invention must not use binding agent with electrode member, thereby in electrode layer, will can not have binding agent, so can constitute the higher double-layer capacitor electrode member of active material specific volume.
Also have, in the capacitor electrode member of the present invention, medium layer is formed at formation in one of them subregion, aluminium surface, and contains the 1st surface portion of the carbide of aluminium.Carbon-containing bed is to constitute the 2nd surface portion that extends to form towards the outside from the 1st surface portion.
In this kind structure, the 2nd surface portion will be brought into play the effect that increases the aluminium surface area.In addition, because formation is contained the 1st surface portion of the carbide of aluminium between aluminium and the 2nd surface portion, thereby the connecting airtight property effect between the 2nd surface portion that the aluminium surface area increases will be brought into play and make to this part 1.Thus, when capacitor electrode member use according to the present invention was belonging to the electrode member of a kind of solid electrolytic capacitor in the capacitor, just can more effectively reach carbon-containing bed connecting airtight property lifting and surface area increased.
Moreover, in the case because between aluminium and the 2nd surface portion, be formed with the 1st surface portion of the carbide that contains aluminium, thereby this part 1 will bring into play improve with the 2nd surface portion that makes the increase of aluminium surface area between the effect of connecting airtight property.Thus, when capacitor electrode member according to the present invention uses when belonging to the electrode member of a kind of double-layer capacitor in the capacitor, can more effectively reach electrode layer carbon-containing bed, and the aluminium of collector body between connecting airtight property castering action.
Moreover, in the capacitor electrode member of the present invention, carbon-containing bedly also contain carbon particle, and the 2nd surface portion is formed between the 1st surface portion and the carbon particle and contain the carbide of aluminium.
In this kind structure,, still can positively keep the connecting airtight property between carbon-containing bed and aluminium even if form thicker carbon-containing bedly.
Moreover, in this kind structure, when capacitor electrode member according to the present invention uses when belonging to the electrode member of a kind of double-layer capacitor in the capacitor, even if form thicker carbon-containing bed, still can positively keep electrode layer carbon-containing bed, and the aluminium of collector body between connecting airtight property.When belonging to the electrode member of a kind of solid electrolytic capacitor in the capacitor according to the above-mentioned capacitor electrode member use of the present invention that constitutes, because carbon-containing bedly will replace oxide film thereon and be present in the aluminium surface, thereby sheet resistance value will be risen, can reach the low ESRization of solid electrolytic capacitor.
Also have, when belonging to the electrode member of a kind of double-layer capacitor in the capacitor according to the above-mentioned capacitor electrode member use of the present invention that constitutes, because carbon-containing bedly will replace oxide film thereon and be present in the aluminium surface, thereby sheet resistance value will be risen, can reduce the ESR of double-layer capacitor.
In the capacitor electrode member of the present invention, carbon-containing bed is except that carbon particle, still contain aluminum particulate, and preferably also contain aluminum particulate surface portion and aluminum particulate Outboard Sections, this aluminum particulate surface portion is formed in the zone of one of them part of aluminum particulate surface, and containing the carbide of aluminium, this aluminum particulate Outboard Sections extends to form towards the aluminum particulate outer side surface from the aluminum particulate surface portion, and contains the carbide of aluminium.In the case, even if form thicker carbon-containing bedly, still can improve the connecting airtight property of carbon-containing bed inside, to prevent the situation of peeling off.
In the capacitor electrode member of the present invention, preferably carbon-containing bed have the medium that contains aluminium element and carbon in inside.
When carbon-containing bed thin situation, only utilize the existence of above-mentioned medium layer, just can make the more existing more lifting of aluminium and carbon-containing bed connecting airtight property.But, when carbon-containing bed thicker situation, the possibility of the situation of peeling off will be arranged in carbon-containing bed inside.In the case,, just can improve carbon-containing bed interior connecting airtight property, can prevent the situation of peeling off by in the carbon-containing bed inner medium that contains aluminium element and carbon that forms.
So, when capacitor electrode member use according to the present invention is belonging to the electrode member of a kind of double-layer capacitor in the capacitor, the sheet resistance value of electrode member is increased.And ESR is lower, so use capacitor electrode member of the present invention, just can constitute high output double-layer capacitor.
Above-mentioned medium is preferably the compound of aluminium element and carbon.In addition, the carbon-containing bed compound that is preferably aluminium element and carbon.
In the capacitor electrode member of the present invention, the carbon-containing bed state that extends from the aluminium surface towards the outside that is preferably formed as.In the case, carbon-containing bedly will more effectively bring into play the effect that enlarges or increase the aluminium surface area.
When capacitor electrode member according to the present invention uses when belonging to the electrode member of a kind of double-layer capacitor in the capacitor, carbon-containing bed more effective performance is made the long-pending effect that enlarges or increase and improve the active material specific volume of electrode layer surface.
When capacitor electrode member of the present invention used the situation of the electrode member that is belonging to a kind of solid electrolytic capacitor in the capacitor, aluminium thickness was preferably more than the 5 μ m, below the 1mm.
Also have, when capacitor electrode member of the present invention uses when belonging to the electrode member of a kind of solid electrolytic capacitor in the capacitor, as long as just on carbon-containing bed one of them face that is formed at aluminium can, its thickness be preferably 0.01 μ m above, below the 5mm.
When capacitor electrode member use of the present invention was belonging to the electrode member of a kind of double-layer capacitor in the capacitor, the aluminium thickness of collector body was preferably more than the 5 μ m, below the 1mm.
When capacitor electrode member of the present invention uses when belonging to the electrode member of a kind of double-layer capacitor in the capacitor, as long as just electrode layer carbon-containing bed be formed on one of them face of aluminium can, its thickness be preferably 0.01 μ m above, below the 10mm.
Capacitor according to the present invention is the capacitor electrode member that possesses above-mentioned arbitrary feature.Thus, when capacitor electrode member use of the present invention was belonging to the electrode member of a kind of solid electrolytic capacitor in the capacitor, the low ESRization that just can reach solid electrolytic capacitor quantized with high capacitance.When capacitor electrode member use of the present invention was belonging to the electrode member of a kind of double-layer capacitor in the capacitor, the height outputization that just can reach double-layer capacitor quantized with high direct capacitance.
Comprise according to the manufacture method of capacitor electrode member of the present invention and to make carbonaceous material be attached to the lip-deep step of aluminium; And the surface adhered to the aluminium of carbonaceous material, implement the step of heating under the state in being disposed at space with hydrocarbonaceous material.
In the manufacture method of the present invention, utilization makes carbonaceous material be attached to the aluminium surface, and in having the space of hydrocarbonaceous material, above-mentioned aluminium is implemented the easy steps of heating, not only can be by carbon-containing bed lining aluminium surface, and can between aluminium and carbonaceous material layer, form the medium layer that contains aluminium element and carbon.Thus, just can improve aluminium and carbon-containing bed 's connecting airtight property.
The invention effect
According to above-mentioned,, can promote the connecting airtight property of the layer that constitutes electrode member according to capacitor electrode member of the present invention.
Also have, when capacitor electrode member use of the present invention is belonging to the electrode member of a kind of solid electrolytic capacitor in the capacitor, can reduce sheet resistance value, and can increase the capacitance of solid electrolytic capacitor.In addition, if use solid electrolytic capacitor of the present invention to constitute solid electrolytic capacitor, just can reach low ESRization and quantize with high capacitance with electrode member.
Moreover, when capacitor electrode member use of the present invention is belonging to the electrode member of a kind of double-layer capacitor in the capacitor, just can improve electrode layer carbon-containing bed, and the aluminium of collector body between connecting airtight property, and can reduce sheet resistance value, and can improve the active material specific volume.In addition, if use double-layer capacitor of the present invention to constitute double-layer capacitor with electrode member, the height outputization that just can reach double-layer capacitor quantizes with high direct capacitance.
Description of drawings
Fig. 1 is an one embodiment of the present invention, and the solid electrolytic capacitor that belongs to the capacitor electrode member is used the cross-sectional configuration schematic diagram of electrode member with electrode member or double-layer capacitor.
Fig. 2 is another embodiment of the present invention, and the solid electrolytic capacitor that belongs to the capacitor electrode member is used the cross-sectional configuration schematic diagram of electrode member with electrode member or double-layer capacitor.
Symbol description
1 aluminium
2 is carbon-containing bed
3 medium layer (the 1st surface portion)
21 the 2nd surface portions
22 carbon particles
23 aluminum particulates
24 aluminum particulate surface portions
25 aluminum particulate Outboard Sections
Embodiment
As shown in Figure 1, as one embodiment of the present invention,, be to go up on aluminium (aluminium sheet or aluminium foil) 1 surface to form carbon-containing bed 2 according to the cross-sectional configuration of the solid electrolytic capacitor that belongs to the capacitor electrode member with electrode member or double-layer capacitor usefulness electrode member.Between aluminium 1 and carbon-containing bed 2, form the medium layer 3 that contains aluminium element and carbon.Carbon-containing bed 2 form the state that extends from aluminium 1 surface towards the outside.Medium layer 3 constitutes in the zone that is formed at aluminium 1 one of them part of surface, and contains the 1st surface portion of the carbide of aluminium.Carbon-containing bed 2 contain from the 1st surface portion 3 towards the outside, according to the 2nd surface portion 21 fibrous or that monofilament shape form extends to form.The 2nd surface portion 21 is compounds of aluminium element and carbon.In addition, carbon-containing bed 2 also contain a plurality of carbon particles 22.The 2nd surface portion 21 extends according to fibrous or monofilament shape form towards the outside from the 1st surface portion 3, and is formed between the 1st surface portion 3 and the carbon particle 22, and contains the carbide of aluminium.
Also have, as shown in Figure 2, as another embodiment of the present invention, the solid electrolytic capacitor that belongs to the capacitor electrode member with electrode member or double-layer capacitor with the cross-sectional configuration of electrode member be have with cross-sectional configuration shown in Figure 1 be identical construction, carbon-containing bed 2 also contain a plurality of carbon particles 22 and aluminum particulate 23.The 2nd surface portion 21 extends according to fibrous or monofilament shape form towards the outside from the 1st surface portion 3, and is formed between the 1st surface portion 3 and the carbon particle 22, and contains the carbide of aluminium.Aluminum particulate surface portion meter 1 is formed in the zone of aluminum particulate 23 one of them part of surface, and contains the carbide of aluminium.Aluminum particulate Outboard Sections 25 is 23 outer side surfaces from aluminum particulate surface portion 24 towards aluminum particulate, extend to form and contain the carbide of aluminium according to celestial being's palmate form.
Constitute the aluminium of the solid electrolytic capacitor of an embodiment of the present invention, or the solid electrolytic capacitor of an embodiment of the present invention is aluminium sheet or aluminium foil with employed aluminium in the manufacture method of electrode member with the electrode member base material.Solid electrolytic capacitor electrode member of the present invention is that the male or female electric conductor is all applicable.
Moreover, constitute the aluminium of the double-layer capacitor of an embodiment of the present invention, or the double-layer capacitor of an embodiment of the present invention is aluminium sheet or aluminium foil with employed aluminium in the manufacture method of electrode member with the electrode member base material.
Solid electrolytic capacitor of the present invention is with in the electrode member, as long as just the words on the carbon-containing bed single face at least that is formed at aluminium can, its thickness is preferably in the scope that 0.01 μ m is above, 5mm is following.Particularly when the situation of anode, be preferably in the scope that 1 μ m is above, 5mm is following, when the situation of negative electrode electric conductor, then be preferably in the scope that 0.5 μ m is above, 300 μ m are following.
Solid electrolyte capacitor member of the present invention preferably uses aluminium and is base material, and the functional high-polymer that conductivity is higher uses the polymeric solid electrolytic capacitor electrode member as solid electrolyte.
Double-layer capacitor of the present invention is with in the electrode member, as long as just the words on the carbon-containing bed single face at least that is formed at aluminium can, its thickness is preferably in the scope that 0.01 μ m is above, 10mm is following.Especially being good in the scope more than the 1 μ m, below the 1mm.
In an embodiment of the present invention or another execution mode, the aluminium that forms carbon-containing bed base material is also without particular limitation, can use fine aluminium or aluminium alloy.Aluminium used in the present invention also contain its form in necessary scope through add such as: (Pb), the aluminium alloy of at least a alloying element of silicon (Si), iron (Fe), copper (Cu), manganese (Mn), magnesium (Mg), chromium (Cr), zinc (Zn), titanium (Ti), vanadium (V), gallium (Ga), nickel (Ni) and boron (B), or through limiting the aluminium of above-mentioned unavoidable impurities constituent content.
The thickness of aluminium and without particular limitation, be preferably in that 5 μ m are above, 1mm with scope in.Use in the electrode member at solid electrolytic capacitor of the present invention especially, the thickness of aluminium is when for the situation of anode, preferably be set in more than the 20 μ m, below the 1mm, when being the situation of negative electrode electric conductor, then preferably be set in the scope that 5 μ m are above, 200 μ m are following.Double-layer capacitor particularly of the present invention is with in the electrode member, and the thickness of aluminium preferably is set in the scope that 5 μ m are above, 20mm is following.
Above-mentioned aluminium can use all perception methods to make.For example modulation has the aluminum or aluminum alloy liquation of above-mentioned set composition, obtains cast block through implementing casting, again it is implemented the suitable processing that homogenizes.Then, by this cast block is implemented hot rolling and cold rolling, just can obtain aluminium.In addition,, also can handle according to implementing intermediate annealing in the scope more than 150 ℃, below 400 ℃ at above-mentioned cold rolling step midway.
In one execution mode of the manufacture method of capacitor electrode member of the present invention, employed hydrocarbonaceous material kind is also without particular limitation.The kind of hydrocarbonaceous material can give an example as: alkane such as methane, ethane, propane, normal butane, iso-butane and pentane are hydrocarbon; Olefin-based hydrocarbons such as ethene, propylene, butylene and butadiene; Second such as acetylene are hydrocarbon etc. soon; Or the derivative of these hydrocarbons.In these hydrocarbons,, thereby preferably use them because alkane such as methane, ethane, propane are that hydrocarbon will form the gas shape in the heating steps of aluminium.Especially be good with any hydrocarbon in methane, ethane and the propane.Good especially hydrocarbon is a methane.
Moreover hydrocarbonaceous material can be used according to arbitrary state such as liquid, gas in manufacture method of the present invention.As long as hydrocarbonaceous material be present in the space, aluminium place just can, can be directed in the space that aluminium disposes according to any method.For example when hydrocarbonaceous material is gasiform situation (methane, ethane, propane etc.) just can as long as hydrocarbonaceous material is filled in aluminium implemented in the confined space of heat treated separately or with inert gas.And when hydrocarbonaceous material is the situation of liquid, as long as with hydrocarbonaceous material separately or be filled in this confined space and the words of oxidation just can with inert gas.
In the heating steps of aluminium, the pressure of heating environment is also without particular limitation, can be normal pressure, reduces pressure or adds and depress.Also have, the adjustment of pressure can in keep certain certain heating-up temperature during, be warming up to certain certain heating-up temperature whenever implement all can midway or from waiting of lowering the temperature of certain certain heating-up temperature midway.
The weight rate that is directed in the hydrocarbonaceous material in the aluminium heating space is also without particular limitation, usually with respect to aluminium 100 weight portions, preferably be set in the scope more than 0.1 weight portion, below 50 weight portions according to carbon scaled value meter, especially being good in the scope more than 0.5 weight portion, below 30 weight portions.
In the step of aluminium heating, heating-up temperature if cooperate words that the aluminium composition etc. of heating target thing suitably sets again just can, be preferably in usually more than 450 ℃, less than implementing in 660 ℃ the scope, especially being good in the scope more than 530 ℃, below 620 ℃.But, in the manufacture method of the present invention, be not that eliminating is implemented heating to aluminium under less than 450 ℃ temperature, need only the words of aluminium being implemented heating according to the temperature that surpasses 300 ℃ at least and just can.
Be according to factors such as heating-up temperatures and different heating time, generally is in the scope more than 1 hour, below 100 hours.
When heating-up temperature reached situation more than 400 ℃, the oxygen concentration in the heating environment preferably was set in below the 1.0 volume %.If heating-up temperature is more than 400 ℃, and the oxygen concentration in the heating environment surpasses 1.0 volume %, and the thermal oxidation tunicle on aluminium surface will become greatly, probably will cause the increase of aluminium sheet resistance value.The double-layer capacitor that causes one of the capacitor electrode member of the present invention anxiety of electrode component surface resistance value increase is arranged.
Also have, before heat treated, also can implement asperitiesization the aluminium surface.Asperities method and without particular limitation, can take such as: clean, known technology such as etching, sand milling.
In the manufacture method of the present invention, after will taking on the aluminium surface, to adhere to carbonaceous material, perhaps when forming thicker carbon-containing bed situation,, in space, aluminium is implemented the step that heats again with hydrocarbonaceous material in after adhering to carbonaceous material and aluminium powder.In the case, the aluminium adhering on surface carbonaceous material can use such as arbitrary things such as activated carbon fiber, activated carbon fiber cloth, active carbon fiber felt, activated carbon powder, prepared Chinese ink, carbon black or graphite.In addition, also carbon compound such as applicable carborundum.Adherence method is so long as use binding agent, solvent or water etc., and above-mentioned carbonaceous material is modulated into pulpous state, liquid or solid, shaped etc., and then utilizes modes such as coating, dip-coating or thermo-compressed to be attached to the lip-deep words of aluminium just can.After also carbonaceous material can being attached on the aluminium surface, in implement heat treated before, just implement dry in the temperature more than 20 ℃, in 300 ℃ of following scopes.
In the manufacture method of the present invention, carbonaceous material also can contain aluminium powder.In addition, carbonaceous material also can contain the oxide of strong dielectric medium or high dielectric under the purpose that improves condenser capacity.
In addition, in the manufacture method of the present invention, when for can make carbonaceous material be attached to the situation of using binding agent on the aluminium surface time, just binding agent is fit to use as: carboxylic upgrading vistanex, the vinylacetate resin, vinyl chloride resin, vinyl chloride-vinyl acetate copolymer resin, vinyl alcohol resin, fluoroethylene resin, acrylic resin, mylar, amine Ethyl formate resin, epoxy resin, urea resin, phenol resin, acrylonitrile resin, nitrocellulose resin, paraffin wax, synthetic resin such as Ployethylene Wax cured or pitch and glue, Rhus lacquer, rosin, the cured natural resin or cured that waits of honey.In these binding agents, look separately molecular weight, resin kind difference, have when heating with the material of volatilization with remain in material in carbon-containing bed because of thermal decomposition with the carbon predecessor.Binding agent also can utilize organic solvent etc. to dilute to adjust viscosity.
In the manufacture method of the present invention, when thicker carbon-containing bed for forming, and when making the situation of adhering to carbonaceous material and aluminium powder on the aluminium surface, preferably with respect under above-mentioned carbonaceous material 100 weight portions, the weight rate in, the following scope of 10000 weight portions above according to 0.01 weight portion adds aluminium powder.
Also have, manufacture method according to capacitor electrode member of the present invention also can include: carbonaceous material is attached on the aluminium surface, and in having the space of hydrocarbonaceous material, implement after the step that above-mentioned aluminium is heated, with the step that aluminium cools off and execution is heated again, in other words, also can also comprise the activation processing step.
In the case, the step with aluminium cooling and heating again be preferably in more than 100 ℃, less than implementing in 660 ℃ the temperature range.
Use the double-layer capacitor of double-layer capacitor of the present invention with electrode member, electrolyte preferably with an organic solvent is.Electrolyte roughly can be categorized as water system and organic solvent system, and that organic solvent is the proof voltage of electrolyte is higher, will help to obtain than macro-energy.
(embodiment)
According to following conventional example 1～2 and embodiment 1～10, make solid electrolytic capacitor electrode member (negative electrode electric conductor).In addition, for comparing, also produce carbon by the reference example of cladded aluminum foil with embodiment.
(conventional example 1)
The aluminium hard paper tinsel (JIS A1050-H18) of thickness 30 μ m is implemented heating 12 hours down for 300 ℃ in temperature in air, just make the solid electrolytic capacitor electrode member.The standard purity of aluminium foil is 99.55 quality %, and the quality analysis value of composition is a silicon: 2250ppm, iron: 3800ppm.
＜conventional example 2 〉
With the soft paper tinsel of aluminium (JIS A1080-0) of thickness 50 μ m, in the electrolyte that contains hydrochloric acid 15% and sulfuric acid 0.5%, in 50 ℃ of temperature, current density 0.5A/cm
2Under the condition, implement the interchange etch processes in 50 seconds, then the aluminium foil after etching is implemented washing, drying, just make the solid electrolytic capacitor electrode member.
(embodiment 1～10)
At the two-sided coating carbonaceous material of going up of the aluminium hard paper tinsel (JIS A1050-H18) of thickness 30 μ m, and implement 10 minutes dried down and adhere to 100 ℃ of temperature.The composition of carbonaceous material is following with respect to carbon black 1 weight portion of average grain diameter 0.05 μ m, acrylic resin 1 weight portion through adding mean molecule quantity 3000, and the aluminium powder of average grain diameter 1 μ m according to weight portion shown in the table 1, and be scattered in the toluene, just form solid shape and divide 30% thing.With regard to the adhering to of carbonaceous material, dried thickness is numerical value as shown in table 1 in aluminium foil single face side.
Then,, implement heating 12 hours, just make the solid electrolytic capacitor electrode member according to the condition of environment shown in the table 1 and temperature to having adhered to the aluminium foil of carbonaceous material.
(reference example)
On the aluminium hard paper tinsel (JIS A1050-H18) of thickness 30 μ m is two-sided, be coated with carbonaceous material, and implementing 10 minutes dried down and adhere to 100 ℃ of temperature.The composition of carbonaceous material is with respect to carbon black (the system #2400B of Mitsubishi Chemical limited company) 1 weight portion, adds polytetrafluoroethylene (PTFE) 1 weight portion.With regard to the adhering to of carbonaceous material, dried thickness is 2 μ m in aluminium foil single face side.
Then,, implement heating 12 hours, just make carbon by cladded aluminum foil according to the condition of environment shown in the table 1 and temperature to having adhered to the aluminium foil of carbonaceous material.The carbon that is obtained is equivalent to change the thing of heating environment gained in embodiment 6 by cladded aluminum foil according to this.
According to following conventional example 3 and embodiment 11～14, make solid electrolytic capacitor electrode member (anode).
(conventional example 3)
To the soft paper tinsel of aluminium of thickness 100 μ m, in the electrolyte that contains hydrochloric acid 12% and phosphoric acid 0.6%, according to 40 ℃ of temperature, current density 0.5A/cm
2Condition is implemented after the interchange etch processes in 100 seconds, changes in 60 ℃ 150g/L ammonium adipate Transfer in Aqueous Solution to be 3V again.Then, the aluminium foil after conversion is implemented washing, drying, just make the solid electrolytic capacitor electrode member.The standard purity of aluminium foil is 99.99 quality %, and the quality analysis value of composition is a silicon: 15ppm, iron: 16ppm, copper: 39ppm.
(embodiment 11～14)
On the aluminium hard paper tinsel (JIS A1050-H18) of thickness 30 μ m is two-sided, be coated with carbonaceous material, and implementing 10 minutes dried down and adhere to 100 ℃ of temperature.The composition of hydrocarbon carbonaceous material is under carbon black 1 weight portion with respect to average grain diameter 0.05 μ m, acrylic resin 1 weight portion through adding mean molecule quantity 3000, and the aluminium powder of average grain diameter 1 μ m according to weight portion shown in the table 2, and be scattered in the toluene, just form solid shape and divide 50%.With regard to the adhering to of carbonaceous material, dried thickness is numerical value as shown in table 2 in aluminium foil single face side.
Then, to having adhered to the aluminium foil of carbonaceous material,, change in 60 ℃ 150g/L ammonium adipate Transfer in Aqueous Solution and be 3V according to implementing under the condition of environment shown in the table 2 and temperature after the heating in 12 hours.Aluminium foil after conversion is implemented washing, drying, just make the solid electrolytic capacitor electrode member.
, assess static capacity, sheet resistance value, reach the connecting airtight property between carbon-containing bed and aluminium with electrode member (or carbon is by cladded aluminum foil) at institute's acquisition solid electrolytic capacitor in conventional example 1～3, embodiment 1～14 and the reference example.Evaluation condition is following to be shown.Assessment result is shown in table 1 and table 2.
[static capacity]
The static capacity of each test portion is according to 7.4 static capacity method of measurement of being put down in writing of JEITA (juridical person's electronics information technology industry association) specification RC-2364A " method of testing of electrode foil for aluminum electrolytic capacitors ", implements in ammonium adipate or ammonium borate aqueous solution and measures.
[sheet resistance value]
Assess surperficial resistance characteristic according to AC impedence method.
Each test portion be impregnated in the 1M aqueous hydrochloric acid solution of 20 ℃ of liquid temperature, and deciding to measure AC impedance under the electric current.Measuring frequency is to get 20 between 0.5 to 1000Hz.Generally the simple equivalent circuit at electrode/aqueous solution interface place is according to moving on the parallel circuits of resistance and double-layer capacitor at electric charge, and the circuit of the solution resistance that is being connected in series is represented.Then, will according to the measured ac impedance measurement value of this condition on complex number plane according to vector representation, X-axis is a real part, Y-axis is an imaginary part.In AC impedance track according to each test portion that said method obtains, will and X-axis between the numerical value of intersection point be considered as sheet resistance value.
[connecting airtight property]
Utilize connecting airtight property of mounting method assessment.Use in the electrode member test portion at the solid electrolytic capacitor of wide 10mm, long 100mm, on carbon-containing bed surface, compressing stickup band (Sumitomo 3M limited company system, trade name " Scotch Tape ") with wide 15mm, long 120mm adhesive surface, and then tear and paste band, and according to connecting airtight property of following formula assessment.
Connecting airtight property (%)={ the carbon-containing bed weight (mg) after tearing/before tearing carbon-containing bed weight (mg) } * 100
[table 1]
| Carbon-containing bed thickness (μ m/ single face) | Al amount of powder (weight portion) | Heating environment | Heating-up temperature (℃) | Static capacity (μ F/cm 2) | Sheet resistance value (Ω) | Connecting airtight property (%) | |
| Conventional example 1 conventional example 2 |
- - 0.3 0.5 2 2 2 2 2 2 2 5 2 | - - - - - - - - - 0.2 1 1 - | Air-methane gas methane gas acetylene gas acetylene gas methane gas methane gas methane gas methane gas methane gas methane gas nitrogen | 300 - 550 550 400 450 500 550 600 550 550 550 550 | 5 98 77 161 95 407 483 504 523 510 491 582 4 | 2.0×10 32.7×10 28.4×10 6.2×10 8.9×10 6.7×10 6.1×10 5.6×10 5.7×10 6.2×10 6.0×10 6.8×10 1.4×103 | - - 92 89 63 80 87 96 96 97 98 98 7 |
[table 2]
| Carbon-containing bed thickness (μ m/ single face) | Al amount of powder (weight portion) | Heating environment | Heating-up temperature (℃) | Static capacity (μ F/cm 2) | Sheet resistance value (Ω) | Connecting airtight property (%) | |
| Conventional example 3 embodiment 11 embodiment 12 embodiment 13 embodiment 14 | - 50 500 5,000 7,500 | - 1 1 1 1 | N-formyl sarcolysine alkane gases methane gases methane gases methane gas | 300 550 550 550 550 | 211 303 379 384 225 | 1.1×10 26.7×10 7.3×10 7.5×10 9.5×10 | - 97 86 79 54 |
Result with table 2 learns by table 1, the solid electrolytic capacitor of embodiment 1～14 with electrode member compared to the solid electrolytic capacitor of conventional example 1～3 with following by cladded aluminum foil of the carbon of electrode member, reference example, to demonstrate higher static capacity, and demonstrate lower sheet resistance value and higher connecting airtight property.In other words, the solid electrolytic capacitor of embodiment 1～14 can reduce sheet resistance value with electrode member, and can increase the capacitance of solid electrolytic capacitor, learn if use solid electrolytic capacitor of the present invention to constitute solid electrolytic capacitor, can reach low ESRization and quantize with high capacitance with electrode member.
Secondly, make double-layer capacitor electrode member paper tinsel according to following conventional example 4～5 with embodiment 15～17.
(conventional example 4)
The aluminium hard paper tinsel (JIS A1050-H18) of thickness 30 μ m is two-sided, in 50 ℃ of electrolyte of temperature of hydrochloric 15 capacity % and sulfuric acid 0.5 capacity %, according to current density 0.4A/cm
2Implement the interchange etch processes in 60 seconds.On the aluminium foil of crossing through etch processes, be coated with specific area 2200m
2Acetylene black (Mitsubishi Chemical limited company system) and the polytetrafluoroethylene (PTFE) of the activated carbon of/g (Nippon Kynol limited company system), average grain diameter 28 μ m, electrode material according to mass ratio allotment in 8: 1: 1, and after the formation electrode layer, reroll and prolong through rolling the electrode layer single face thickness of delaying to be 100 μ m states, just to make the double-layer capacitor electrode member.
(conventional example 5)
With activated carbon (Nippon Kynol limited company system), acetylene black (Mitsubishi Chemical limited company system), and PTFE, allocate at 8: 1: 1 according to mass ratio, just make the pellet electrode material of thickness 100 μ m.Then, two-sided to employed aluminium etched foil in the conventional example 4, use the intaglio plate coating machine blacklead to be coated with into the thickness of single face 2 μ m/ single faces with the adhesive that PTFE allocates according to mass ratio at 7: 3 on one side, Yi Bian the above-mentioned pellet electrode material of fitting just makes the double-layer capacitor electrode member.
(embodiment 15)
Aluminium hard paper tinsel＜JIS A1050-H18 at thickness 30 μ m〉be coated with carbonaceous material on two-sided, and implement 10 minutes dried and adhere to according to 100 ℃ of temperature.The composition of carbonaceous material is with respect under activated carbon (Nippon Kynol limited company system) 1 weight portion, adds acrylic resin 1 weight portion, aluminium powder 1 weight portion, reaches black soon (Mitsubishi Chemical limited company system) 0.1 weight portion of second.In addition, the adhesion amount that contains plain carbon active material is that to be adjusted to dried thickness be the state of 100 μ m in aluminium foil single face side.
Then, will adhere to the aluminium foil of carbonaceous material, in the methane gas environment,, just make the double-layer capacitor electrode member in 600 ℃ of heating of implementing 12 hours down of temperature.
＜embodiment 16 〉
At the two-sided coating carbonaceous material of going up of the aluminium hard paper tinsel (JIS A1050-H18) of thickness 30 μ m, and implement 10 minutes dried down and adhere in 150 ℃ of temperature.The composition of carbonaceous material is following with respect to activated carbon (Nippon Kynol limited company system) 1 weight portion, adds polyvinyl alcohol (PVA) 1 weight portion, and black soon (Mitsubishi Chemical limited company system) 0.2 weight portion of second.In addition, the adhesion amount of carbonaceous material is that to be adjusted to dried thickness be the state of 100 μ m in aluminium foil single face side.
Then, will adhere to the aluminium foil of carbonaceous material, in the methane gas environment in 600 ℃ of temperature. implement down 12 hours heating, just make the double-layer capacitor electrode member.
(embodiment 17)
At the two-sided coating carbonaceous material of going up of the aluminium hard paper tinsel (JIS A1050-H18) of thickness 30 μ m, implement 10 minutes dried down and adhere to 200 ℃ of temperature.The composition of carbonaceous material is following with respect to activated carbon (Nippon Kynol limited company system) 1 weight portion, adds polyvinyl alcohol (PVA) 1 weight portion, and black soon (Mitsubishi Chemical limited company system) 0.2 weight portion of second.In addition, the adhesion amount of carbonaceous material is that to be adjusted to dried thickness be the state of 100 μ m in aluminium foil single face side.
Then, will adhere to the aluminium foil of carbonaceous material, in the methane gas environment,, in air, implement 2 hours heating down for 400 ℃ again, just make the double-layer capacitor electrode member in temperature in 600 ℃ of heating of implementing 12 hours down of temperature.
At among conventional example 4～5, the embodiment 15～17 the double-layer capacitor that obtains electrode member paper tinsel, assess connecting airtight property between carbon-containing bed and aluminium foil paper tinsel, sheet resistance value, and active material specific volume.Evaluation condition is following to be shown.Assessment result is as shown in table 3.
[connecting airtight property]
Utilize connecting airtight property of mounting method assessment.Use in the electrode member test portion at the double-layer capacitor of wide 10mm, long 100mm, on carbon-containing bed surface, compressing stickup band (Sumitomo 3M limited company system, trade name " Scotch Tape ") with wide 15mm, long 120mm adhesive surface, and then tear and paste band, and according to connecting airtight property of following formula assessment.
Connecting airtight property (%)={ the carbon-containing bed weight (mg) after tearing/before tearing carbon-containing bed weight (mg) } * 100
[sheet resistance value]
According to AC impedence method surface measurements resistance value.
Each test portion be impregnated in the 1M aqueous hydrochloric acid solution of 20 ℃ of liquid temperature, and deciding to measure AC impedance under the electric current.Measuring frequency is to get 20 between 0.5 to 1000Hz.Be that be connected in series on the parallel circuits that moves resistance and double-layer capacitor at the electric charge circuit of solution resistance is represented generally in the simple equivalent circuit at electrode/aqueous solution interface place.Then, will according to the measured ac impedance measurement value of this condition on complex number plane according to vector representation, X-axis is a real part, Y-axis is an imaginary part.In AC impedance track according to each test portion that said method obtains, will and X-axis between the numerical value of intersection point be considered as sheet resistance value.
[active material specific volume]
After direct current execution charging, the capability value that will be calculated from discharge electricity amount uses to be the active material specific volume divided by electrode layer numerical value that weight obtains.
The static capacity of each test portion is according to JEITA (juridical person's electronics information technology industry association) specification RCR-2370A " the points for attention guiding on fixedly double-layer capacitor uses " 6.2.1 item, reaches the static capacity method of measurement that RC-237 ' 7 " double-layer capacitor method of testing " is put down in writing, in tetraethyl ammonium tetrafluoro boric acid saline solution, according to discharging current 0.3m A/cm
2, measure beginning voltage 1V, the condition of measuring end voltage 2.7V measures.
[table 3]
| Connecting airtight property (%) | Sheet resistance value (Ω) | Active material specific volume (F/g) | |
| Conventional example 4 | 50 | 2.2×10 4 | 23 |
| Conventional example 5 | 38 | 2.3×10 2 | 28 |
| Embodiment 15 | 99 | 5.7×10 | 30 |
| Embodiment 16 | 98 | 5.6×10 | 34 |
| Embodiment 17 | 98 | 5.6×10 | 50 |
The result learns by table 3, and the double-layer capacitor of embodiment 15～17 is used under the electrode member at the double-layer capacitor compared to conventional example 4～5 with electrode member, will demonstrate connecting airtight property of height, low sheet resistance value, reach high activity material specific volume.In other words, the double-layer capacitor of embodiment 15～17 can reduce sheet resistance value with electrode member, and can increase the static capacity of double-layer capacitor, learn if use double-layer capacitor of the present invention to constitute solid electrolytic capacitor, can reach high outputization and quantize with high direct capacitance with electrode member.
Above-mentionedly disclose execution mode and embodiment all only terminates in illustration, and can not think in restriction the present invention.The scope of the invention is not above-mentioned execution mode and embodiment, but represented by claim, such as with claim have in impartial connotation and the scope all revise all be encompassed in distortion in.
Industrial applicibility
Use consists of solid electrolytic capacitor according to a kind of solid electrolytic capacitor electrode member in the capacitor electrode member of the present invention, just can reach low ESRization and quantize with high capacitance. In addition, use according to a kind of double-layer capacitor electrode member in the capacitor electrode member of the present invention, consist of double-layer capacitor, just can reach high output and high direct capacitance and quantize.
Claims (17)
1. capacitor electrode member possesses:
Aluminium (1);
Carbon-containing bed (2), it is formed on the surface of above-mentioned aluminium (1); And
Medium layer (3), it is formed between above-mentioned aluminium (1) and above-mentioned carbon-containing bed (2), and contains aluminium element and carbon,
Above-mentioned medium layer (3) includes the 1st surface portion (3), and the 1st surface portion (3) is formed in the zone of the surperficial at least a portion of above-mentioned aluminium (1), and contains the carbide of aluminium,
Above-mentioned carbon-containing bed (2) include the 2nd surface portion (21), and the 2nd surface portion (21) extends to form towards the outside from above-mentioned the 1st surface portion (3),
Above-mentioned carbon-containing bed (2) also contain carbon particle (22), and above-mentioned the 2nd surface portion (21) is formed between above-mentioned the 1st surface portion (3) and the above-mentioned carbon particle (22), contain the carbide of aluminium.
2. capacitor electrode member as claimed in claim 1, wherein,
Above-mentioned carbon-containing bed (2) are also contained:
Aluminum particulate (23);
Aluminum particulate surface portion (24), it is formed in the zone of the surperficial at least a portion of above-mentioned aluminum particulate (23), contains the carbide of aluminium; And
Aluminum particulate Outboard Sections (25), it extends to form towards above-mentioned aluminum particulate (23) outer side surface from above-mentioned aluminum particulate surface portion (24), contains the carbide of aluminium.
3. capacitor electrode member as claimed in claim 1, wherein above-mentioned carbon-containing bed (2) have the medium that contains aluminium element and carbon in inside.
4. capacitor electrode member as claimed in claim 1, wherein above-mentioned medium are the compounds of aluminium element and carbon.
5. capacitor electrode member as claimed in claim 1, wherein, the compound that above-mentioned carbon-containing bed (2) are aluminium element and carbon.
6. capacitor electrode member as claimed in claim 1, wherein, above-mentioned carbon-containing bed (2) form the state that extends towards the outside from the surface of above-mentioned aluminium.
7. capacitor electrode member as claimed in claim 1, wherein, the thickness of above-mentioned aluminium (1) is more than the 5 μ m, below the 1mm.
8. capacitor electrode member as claimed in claim 1, wherein, this capacitor electrode member is the solid electrolytic capacitor electrode member.
9. capacitor electrode member as claimed in claim 8, wherein, the thickness that formed above-mentioned carbon-containing bed (2) are gone up on a surface of above-mentioned aluminium (1) is more than the 0.01 μ m, below the 5mm.
10. capacitor electrode member as claimed in claim 1, wherein, this capacitor electrode member is the double-layer capacitor electrode member.
11. capacitor electrode member as claimed in claim 10, wherein, the thickness that formed above-mentioned carbon-containing bed (2) are gone up on a surface of above-mentioned aluminium (1) is more than the 0.01 μ m, below the 10mm.
12. a capacitor possesses electrode member, it is characterized by, above-mentioned electrode member possesses:
Aluminium (1);
Carbon-containing bed (2), it is formed on the surface of above-mentioned aluminium (1); And
Medium layer (3), it is formed between above-mentioned aluminium (1) and above-mentioned carbon-containing bed (2), and contains aluminium element and carbon,
Above-mentioned medium layer (3) includes the 1st surface portion (3), and the 1st surface portion (3) is formed in the zone of the surperficial at least a portion of above-mentioned aluminium (1), and contains the carbide of aluminium,
Above-mentioned carbon-containing bed (2) include the 2nd surface portion (21), and the 2nd surface portion (21) extends to form towards the outside from above-mentioned the 1st surface portion (3),
Above-mentioned carbon-containing bed (2) also contain carbon particle (22), and above-mentioned the 2nd surface portion (21) is formed between above-mentioned the 1st surface portion (3) and the above-mentioned carbon particle (22), contain the carbide of aluminium.
13. capacitor as claimed in claim 12, wherein, this capacitor is a solid electrolytic capacitor.
14. capacitor as claimed in claim 12, wherein, this capacitor is a double-layer capacitor.
15. the manufacture method of a capacitor electrode member includes:
Make carbonaceous material be attached to the step on aluminium surface; And
The surface has been adhered to the step of implementing heating under the state of above-mentioned aluminium in being disposed at space of carbonaceous material with hydrocarbonaceous material.
16. the manufacture method of capacitor electrode member as claimed in claim 15, wherein, above-mentioned capacitor electrode member is the solid electrolytic capacitor electrode member.
17. the manufacture method of capacitor electrode member as claimed in claim 15, wherein, above-mentioned capacitor electrode member is the double-layer capacitor electrode member.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
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| JP2004283269A JP4392312B2 (en) | 2004-09-29 | 2004-09-29 | ELECTRIC DOUBLE LAYER CAPACITOR ELECTRODE MEMBER, ITS MANUFACTURING METHOD, AND ELECTRIC DOUBLE LAYER CAPACITOR USING ELECTRO DOUBLE LAYER CAPACITOR ELECTRODE MEMBER |
| JP283269/2004 | 2004-09-29 | ||
| JP2004283270A JP4392313B2 (en) | 2004-09-29 | 2004-09-29 | SOLID ELECTROLYTIC CAPACITOR ELECTRODE MEMBER, ITS MANUFACTURING METHOD, AND SOLID ELECTROLYTIC CAPACITOR USING SOLID ELECTROLYTIC CAPACITOR ELECTRODE MEMBER |
| JP283270/2004 | 2004-09-29 | ||
| PCT/JP2005/015886 WO2006035569A1 (en) | 2004-09-29 | 2005-08-31 | Capacitor electrode member, method for manufacturing the same, and capacitor provided with the electrode member |
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| CN101027736B CN101027736B (en) | 2011-03-16 |
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| US10600582B1 (en) | 2016-12-02 | 2020-03-24 | Fastcap Systems Corporation | Composite electrode |
| US11450488B2 (en) | 2016-12-02 | 2022-09-20 | Fastcap Systems Corporation | Composite electrode |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP4392312B2 (en) | 2009-12-24 |
| JP2006100477A (en) | 2006-04-13 |
| CN101027736B (en) | 2011-03-16 |
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