CN101165828A - Buckle type electrochemical capacitor and its manufacture method - Google Patents
Buckle type electrochemical capacitor and its manufacture method Download PDFInfo
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- CN101165828A CN101165828A CNA2007100170498A CN200710017049A CN101165828A CN 101165828 A CN101165828 A CN 101165828A CN A2007100170498 A CNA2007100170498 A CN A2007100170498A CN 200710017049 A CN200710017049 A CN 200710017049A CN 101165828 A CN101165828 A CN 101165828A
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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
- Y02E60/10—Energy storage using batteries
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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 button-type electrochemical capacitor comprises: a button-type anode cover and a button-type cathode cover, and the button-type anode cover is tightly coupled to the button-type cathode cover; inside the button-type anode cover and the button-type cathode cover, there are anode piece, cathode piece, multi-pore isolator and electrolyte; the anode piece is made by means of coating the anode active materials on the anode current collector; the cathode piece is made by means of coating the cathode active materials on the negative current collector; the anode piece is connected to the button-type anode cover; the cathode piece is connected to the button-type cathode cover; said anode piece, multi-pore isolator film and the cathode piece are winded together to form a square coil core.
Description
Technical field
The invention discloses a kind of ultracapacitor and manufacture method thereof, relate in particular to button ultracapacitor and manufacture method thereof.
Background technology
Ultracapacitor is a kind of novel environment friendly energy storage device between traditional capacitor and secondary cell that occurs in recent years, it is when keeping the big characteristics of traditional capacitor power density, its static capacity can reach farad level even thousands of farad, therefore also have the higher characteristics of energy density, simultaneously ultracapacitor has also that the speed of discharging and recharging is fast, efficiency for charge-discharge is high, the life-span is long, fail safe is good, advantages of environment protection, be a kind of novel, practical, efficient, clean reproducible new forms of energy energy storage device.
The button ultracapacitor all has wide application in a lot of fields; the widest part of button supercapacitor applications is the electronic product field at present, mainly is the back-up source that serves as CMOS (complementary metal oxide semiconductors (CMOS)) protection, timer, clock and watch, video tape recorder, mobile phone etc.
The manufacture method of button ultracapacitor mainly adopts the compound of the carbonaceous active material, conductive agent and binding agent, the solvent etc. that modulate directly after being rolled on the roll squeezer, be washed into required button pole piece or adopt tablet machine directly to get the button pole piece, then positive electrode, isolation mode, negative electrode etc. are made required size, adding electrolyte is put into box hat successively and is made button ultracapacitor monomer.
But, for the button ultracapacitor of routine, positive electrical pole piece and negative electricity pole piece are very thick, are generally 0.5mm～1mm, because internal resistance is excessive, in heavy-current discharge, excessive by the pressure drop that internal resistance causes, cause capacitance loss serious, but also exist because the button pole piece is blocked up, slow and the polarization phenomena that produce of electronic conductance influences the operate as normal of ultracapacitor, and this also is the problem that present buckle type electrochemical capacitor urgent need will solve.
Summary of the invention
The technical problem to be solved in the present invention is the deficiency that overcomes existing product, and a kind of button ultracapacitor of heavy-current discharge performance excellence is provided.
A kind of button ultracapacitor, comprise: anodal cap of button and button negative pole cap, positive cap of button and button negative pole cap are tightly connected, and in anodal cap of button and the button negative pole cap positive electrical pole piece, negative electricity pole piece, porous isolating membrane and electrolyte are housed; The positive electrical pole piece is coated on the plus plate current-collecting body by positive electrode active materials and makes, and the negative electricity pole piece is coated on the negative current collector by negative active core-shell material and makes, and the positive electrical pole piece is connected in the anodal cap of button, and the negative electricity pole piece is connected in button negative pole cap; It is characterized in that: described positive electrical pole piece, porous isolating membrane and negative electricity pole piece are wound on successively forms the volume core together.The preferred square or pie volume core of volume core.
According to described button ultracapacitor, it is characterized in that: described volume core is reeled by positive electrical pole piece, porous isolating membrane, negative electricity pole piece and is made square or pie.
According to described button ultracapacitor, it is characterized in that: described positive electrical pole piece comprises positive electrode active materials, plus plate current-collecting body and positive strap, and the positive electrical pole piece links to each other with anodal cap by positive strap; Described negative electricity pole piece comprises negative active core-shell material, negative current collector and negative pole brace, and the negative electricity pole piece links to each other with the negative pole cap by the negative pole brace.
According to described button ultracapacitor, it is characterized in that:
Described positive electrical pole piece is to be mixed into anode sizing agent by positive electrode active materials, conductive agent, binding agent according to following weight portion to be coated on the plus plate current-collecting body and to make:
Positive electrode active materials 70～95
Conductive agent 2～10
Binding agent 3～20;
Described negative electricity pole piece (2) is to be mixed into cathode size by negative active core-shell material (12), conductive agent, binding agent according to following weight portion to be coated on the negative current collector (11) and to make:
Negative active core-shell material 70～95
Conductive agent 2～10
Binding agent 3～20.
According to described button ultracapacitor, it is characterized in that:
(1) positive electrode active materials 87～92
Conductive agent 3～7
Binding agent 5～10;
(2) negative active core-shell material 87～92
Conductive agent 23～7
Binding agent 5～10.
According to described button ultracapacitor, it is characterized in that:
Described positive electrode active materials and negative active core-shell material are selected for use: the carbonaceous active material of Large ratio surface, one or more in metal oxide or the conducting high polymers thing;
The carbonaceous active material of Large ratio surface: porous active carbon, activated carbon carbon fiber, carbon aerogels, carbon nano-tube, vitreous carbon;
Metal oxide: manganese dioxide (MnO
2), nickel oxide (NiO
x), ruthenic oxide (RuO
2);
Conducting high polymers thing: poly-propylamine (PAN), polypyrrole, polythiophene;
The conductive agent of described positive electrical pole piece and negative electricity pole piece is selected for use: acetylene carbon black, one or more in conductive carbon fibre or the electrically conductive graphite;
The collector of described positive electrical pole piece and negative electricity pole piece is selected for use: aluminium foil, aluminium net, Copper Foil, copper mesh, nickel foam, nickel foil or nickel screen, plus plate current-collecting body and negative current collector can be selected same kind of collector, also can select different collectors;
The bonding agent of described positive electrical pole piece and negative electricity pole piece is selected for use: polytetrafluoroethylene (PTFE), homopolymerization or copolymerization vinylidene (PVDF), modified polyacrylic acid and ester class thereof, polyvinyl alcohol, sodium carboxymethylcellulose, described bonding agent both can be Powdered also can be emulsion form;
The used for electrolyte of described capacitor: organic system or inorganic system; Wherein, the electrolyte solvent of organic system is selected ethylene carbonate, propene carbonate, acetonitrile, gamma-butyrolacton or their mixed solvent for use, electrolyte salt can be selected tetraethyl tetrafluoroborate, tetraethyl tetrafluoro boric acid quaternary alkylphosphonium salt, four n-pro-pyl tetrafluoro boric acid quaternary alkylphosphonium salts, tetraethyl hexafluorophosphoric acid quaternary alkylphosphonium salt, lithium hexafluoro phosphate or LiBF4 for use, and described concentration of electrolyte is 0.1～5 mol; The electrolyte solvent of inorganic system is a water, and electrolyte salt is selected sulfuric acid, sodium sulphate, potassium hydroxide for use, and described concentration of electrolyte is 1～10 mol.
Described porous isolating membrane is selected for use: polyethylene film, polypropylene screen or they polymer-modified, perhaps select nonwoven fabrics or cellulose for use.
According to described button ultracapacitor, it is characterized in that:
Positive electrode active materials and negative active core-shell material are selected for use: porous activated carbon 85 weight portions;
The conductive agent of positive electrical pole piece and negative electricity pole piece is selected for use: acetylene carbon black 5 weight portions;
The bonding agent of positive electrical pole piece and negative electricity pole piece is selected for use: equal Kynoar (PVDF) powder 10 weight portions;
Equal Kynoar (PVDF) powder with 10 weight portions is dissolved in the n-methlpyrrolidone (NMP) of 250 weight portions fully earlier, and then the porous activated carbon of 85 weight portions, the acetylene carbon black of 5 weight portions are mixed, stir, disperse to make uniform sizing material with it.
A kind of method of making the button ultracapacitor is characterized in that comprising:
A. ultracapacitor positive electrode active materials, conductive agent, binding agent are added solvent according to described weight portion and become anode sizing agent; Super capacitor anode active material, conductive agent, binding agent are added solvent according to described weight portion become cathode size;
B. anode sizing agent that step a is made and cathode size evenly are coated on the metal collector respectively, obtain positive electrical pole piece and negative electricity pole piece;
C. cut porous isolating membrane;
D. dried positive electrical pole piece, porous isolating membrane and negative electricity pole piece are reeled successively and obtain square or pie volume core;
E. the positive strap on the positive electrical pole piece is connected in anodal cap, the negative pole brace on the negative electricity pole piece is connected in the negative pole cap;
F. add electrolyte;
G. be packaged into the button ultracapacitor.
Method according to described manufacturing button ultracapacitor is characterized in that:
(1) carry out the raw material proportioning according to following weight portion:
Porous activated carbon 85
Acetylene carbon black 5
Equal Kynoar (PVDF) powder 10;
Manufacture method: equal Kynoar (PVDF) powder with 10 weight portions is dissolved in the n-methlpyrrolidone (NMP) of 250 weight portions fully earlier, and then the porous activated carbon of 85 weight portions, the acetylene carbon black of 5 weight portions are mixed, stir, disperse to make uniform sizing material with it;
(2) adopt casting machine that its slurry evenly is coated in the metal aluminum foil surface according to the requirement of the electrode size of manufacturing ultracapacitor, the coating size can realize by the control to casting machine, 130 ℃ of vacuumize 5～60 minutes; According to same method, also apply slurry uniformly at the another side of aluminium foil, 100 ℃ of vacuumize 5～20 minutes; Make the ultracapacitor pole piece that both sides evenly apply the carbonaceous active material thus;
(3) cut above-mentioned ultracapacitor pole piece, weld positive strap and negative pole brace respectively and obtain ultracapacitor positive electrical pole piece and negative electricity pole piece;
(3) cut barrier film according to the requirement of barrier film size;
(4) a slice ultracapacitor positive electrical pole piece, a slice super capacitor anode electrode slice, a slice porous isolating membrane are wound on and obtain rolling up core together; The preferred square or pie volume core of volume core.
(5) positive strap is connected in the anodal cap of button, the negative pole brace is connected in button negative pole cap;
(6) add electrolyte;
(7) be packaged into the button ultracapacitor.
Beneficial effect of the present invention is: use square in the stainless steel case or cheese volume core, positive electrical pole piece and negative electricity pole piece thickness are 0.02mm～0.2mm, and existing relatively button structure electrode sheet is thinner.Can obviously reduce the internal resistance of button ultracapacitor on the one hand; Reduce the polarization that electronic conductance causes slowly on the other hand, improve heavy-current discharge performance.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the positive electrical pole piece schematic diagram among the present invention.
Fig. 3 is the negative electricity pole piece schematic diagram among the present invention.
Fig. 4 is a porous isolating membrane schematic diagram of the present invention.
In the accompanying drawing: 1, negative pole brace; 2, negative electricity pole piece; 3, button negative pole cap; 4, porous isolating membrane; 5, encapsulant; 6, the anodal cap of button; 7, positive strap; 8, positive electrical pole piece; 9, plus plate current-collecting body; 10, positive electrode active materials; 11, negative current collector; 12, negative active core-shell material.
Embodiment
Button ultracapacitor of the present invention, as Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, comprise: anodal cap 6 of button and button negative pole cap 3, the anodal cap 6 of button is tightly connected with button negative pole cap 3, in anodal cap 6 of button and the button negative pole cap 3 positive electrical pole piece 8, negative electricity pole piece 2, porous isolating membrane 4 and electrolyte is housed; Positive electrical pole piece 8 is coated on the plus plate current-collecting body 9 by positive electrode active materials 10 and makes, negative electricity pole piece 2 is coated on the negative current collector 11 by negative active core-shell material 12 and makes, positive electrical pole piece 8 is connected in the anodal cap 6 of button, and the negative electricity pole piece is connected in button negative pole cap 3; Described positive electrical pole piece 8, porous isolating membrane 4 and negative electricity pole piece 2 are wound on successively to be formed square or pie volume core together.
Described square or pie volume core is reeled and is made by a slice positive electrical pole piece, a slice porous isolating membrane, a slice negative electricity pole piece.
Described positive electrical pole piece 8 comprises positive electrode active materials 10, plus plate current-collecting body and positive strap 7, and positive electrical pole piece 8 links to each other with anodal cap 6 by positive strap 7; Described negative electricity pole piece 2 comprises negative active core-shell material 12, negative current collector and negative pole brace, and negative electricity pole piece 2 links to each other with negative pole cap 3 by negative pole brace 1.
The manufacture method of a kind of button ultracapacitor of the present invention comprises the steps:
A. with ultracapacitor positive electrode active materials, conductive agent, binding agent, solvent according to certain weight ratio be mixed into anode sizing agent; With super capacitor anode active material, conductive agent, binding agent, solvent according to certain weight ratio be mixed into cathode size;
B. the anode sizing agent that step a is made evenly is coated on and obtains the positive electrical pole piece on the cathode metal collector; The cathode size that step a is made evenly is coated on and obtains the negative electricity pole piece on the negative pole metal collector.Coating thickness is 0.02mm～0.2mm, and applying one side and two sides can.
C. cut porous isolating membrane;
D. dried positive electrical pole piece, porous isolating membrane and negative electricity pole piece being superposeed successively to roll obtains square or pie volume core;
E. the positive strap on the positive electrical pole piece is connected in anodal cap, the negative pole brace on the negative electricity pole piece is connected in the negative pole cap;
F. add electrolyte;
G. be packaged into the button ultracapacitor.
In above-mentioned manufacture method, the weight ratio of described super capacitor positive electrode active materials, conductive agent, binding agent is 70～95: 2～10: 3～20, be preferably 87～92: 3～7: 5～10.
In above-mentioned manufacture method, the weight ratio of described super capacitor negative active core-shell material, conductive agent, binding agent is 70～95: 2～10: 3～20, be preferably 87～92: 3～7: 5～10.
In above-mentioned manufacture method, described super capacitor positive electrode active materials and super capacitor negative active core-shell material can be selected for use: the carbonaceous active material of Large ratio surface, one or more in metal oxide or the conducting high polymers thing.
Carbonaceous active material: porous active carbon, activated carbon carbon fiber, carbon aerogels, carbon nano-tube, vitreous carbon.
Metal oxide: manganese dioxide (MnO
2), nickel oxide (NiO
x), ruthenic oxide (RuO
2).
Conducting high polymers thing: poly-propylamine (PAN), polypyrrole, polythiophene.
In above-mentioned manufacture method, the conductive agent of described ultracapacitor positive electrical pole piece and super capacitor anode electrode slice can be selected for use: acetylene carbon black, one or more in conductive carbon fibre or the electrically conductive graphite.
In above-mentioned manufacture method, the collector of described anode of electrochemical capacitor electrode slice and electrochemical capacitor negative electricity pole piece can be selected for use: aluminium foil, aluminium net, Copper Foil, copper mesh, nickel foam, nickel foil or nickel screen, plus plate current-collecting body and negative current collector can be selected same kind of collector, also can select different collectors.
In above-mentioned manufacture method, the bonding agent of described ultracapacitor positive electrical pole piece and super capacitor anode electrode slice can be selected for use: polytetrafluoroethylene (PTFE), homopolymerization or copolymerization vinylidene (PVDF), modified polyacrylic acid and ester class thereof, polyvinyl alcohol, sodium carboxymethylcellulose etc., described bonding agent both can be Powdered also can be emulsion form.
In above-mentioned manufacture method, the electrolyte of described ultracapacitor can be selected for use: organic system or inorganic system.Wherein, the electrolyte solvent of organic system can be selected ethylene carbonate, propene carbonate, acetonitrile, gamma-butyrolacton or their mixed solvent for use, electrolyte salt can be selected tetraethyl tetrafluoroborate, tetraethyl tetrafluoro boric acid quaternary alkylphosphonium salt, four n-pro-pyl tetrafluoro boric acid quaternary alkylphosphonium salts, tetraethyl hexafluorophosphoric acid quaternary alkylphosphonium salt, lithium hexafluoro phosphate or LiBF4 for use, and described concentration of electrolyte is the 0.1-5 mol; The electrolyte solvent of inorganic system is a water, and electrolyte salt can be selected sulfuric acid, sodium sulphate, potassium hydroxide for use, and described concentration of electrolyte is the 1-10 mol.
In above-mentioned manufacture method, described porous isolating membrane can be selected for use: polyethylene film, polypropylene screen or they polymer-modified, also can use nonwoven fabrics or cellulose etc.
In above-mentioned manufacture method, the external packing mode of described ultracapacitor is the stainless steel case packing.
To be further described the manufacture method and the concrete structure of ultracapacitor of the present invention by embodiment below.
Embodiment 1:
Step is made button ultracapacitor of the present invention by the following method.
(1) carry out the raw material proportioning according to following weight portion:
Porous activated carbon 85;
Acetylene carbon black 5;
Equal Kynoar (PVDF) powder 10;
Manufacture method: equal Kynoar (PVDF) powder with 10 weight portions is dissolved in the n-methlpyrrolidone (NMP) of 250 weight portions fully earlier, and then the porous activated carbon of 85 weight portions, the acetylene carbon black of 5 weight portions are mixed, stir, disperse to make uniform sizing material with it.
(2) adopt casting machine that its slurry evenly is coated in the metal aluminum foil surface according to the requirement of the electrode size of manufacturing ultracapacitor, the coating size can realize by the control to casting machine, 130 ℃ of vacuumize 5～60 minutes; According to same method, also apply slurry uniformly at the another side of aluminium foil, 100 ℃ of vacuumize 5～20 minutes; Make the electrochemical capacitor pole piece that both sides evenly apply the carbonaceous active material thus;
(3) according to the size of Fig. 2 and Fig. 3, cut above-mentioned ultracapacitor pole piece, weld positive strap and negative pole brace respectively and obtain ultracapacitor positive electrical pole piece and negative electricity pole piece;
(3) cut barrier film according to the requirement of barrier film size;
(4) a slice ultracapacitor positive electrical pole piece, a slice super capacitor anode electrode slice, a slice porous isolating membrane are wound on obtain square together or pie volume core;
(5) positive strap is connected in the anodal cap of button, the negative pole brace is connected in button negative pole cap;
(6) add electrolyte;
(7) be packaged into the button ultracapacitor.
Button ultracapacitor of the present invention, button shell diameter 19mm, thickness 2.0mm.Compare the button ultracapacitor of traditional lamination mode, internal resistance is low to moderate 200 milliohms from 15 ohmmic drops, and rated current is increased to 300mA by 3mA.
The above only is preferred embodiment of the present invention, and the various variations that those skilled in the art carries out in not breaking away from claim limited range of the present invention are all within protection scope of the present invention.
Claims (9)
1. button ultracapacitor, comprise: anodal cap (6) of button and button negative pole cap (3), the anodal cap of button (6) is tightly connected with button negative pole cap (3), in anodal cap (6) of button and the button negative pole cap (3) positive electrical pole piece (8), negative electricity pole piece (2), porous isolating membrane (4) and electrolyte is housed; Positive electrical pole piece (8) is coated on the plus plate current-collecting body (9) by positive electrode active materials (10) and makes, negative electricity pole piece (2) is coated on the negative current collector (11) by negative active core-shell material (12) and makes, positive electrical pole piece (8) is connected in the anodal cap (6) of button, and the negative electricity pole piece is connected in button negative pole cap (3); It is characterized in that: described positive electrical pole piece (8), porous isolating membrane (4) and negative electricity pole piece (2) are wound on successively forms the volume core together.
2. button ultracapacitor according to claim 1 is characterized in that: described volume core is reeled by positive electrical pole piece, porous isolating membrane, negative electricity pole piece and is made square or pie volume core.
3. button ultracapacitor according to claim 1 and 2, it is characterized in that: described positive electrical pole piece (8) comprises positive electrode active materials (10), plus plate current-collecting body and positive strap (7), and positive electrical pole piece (8) links to each other with anodal cap (6) by positive strap (7); Described negative electricity pole piece (2) comprises negative active core-shell material (12), negative current collector and negative pole brace, and negative electricity pole piece (2) links to each other with negative pole cap (3) by negative pole brace (1).
4. button ultracapacitor according to claim 1 is characterized in that:
Described positive electrical pole piece (8) is to be mixed into anode sizing agent by positive electrode active materials (10), conductive agent, binding agent according to following weight portion to be coated on the plus plate current-collecting body (9) and to make:
Positive electrode active materials 70～95
Conductive agent 2～10
Binding agent 3～20;
Described negative electricity pole piece (2) is to be mixed into cathode size by negative active core-shell material (12), conductive agent, binding agent according to following weight portion to be coated on the negative current collector (11) and to make:
Negative active core-shell material 70～95
Conductive agent 2～10
Binding agent 3～20.
5. button ultracapacitor according to claim 4 is characterized in that:
(1) positive electrode active materials 87～92
Conductive agent 3～7
Binding agent 5～10;
(2) negative active core-shell material 87～92
Conductive agent 23～7
Binding agent 5～10.
6. according to claim 4 or 5 described button ultracapacitors, it is characterized in that:
Described positive electrode active materials and negative active core-shell material are selected for use: the carbonaceous active material of Large ratio surface, one or more in metal oxide or the conducting high polymers thing;
The carbonaceous active material of Large ratio surface: porous active carbon, activated carbon carbon fiber, carbon aerogels, carbon nano-tube, vitreous carbon;
Metal oxide: manganese dioxide (MnO
2), nickel oxide (NiO
x), ruthenic oxide (RuO
2);
Conducting high polymers thing: poly-propylamine (PAN), polypyrrole, polythiophene;
The conductive agent of described positive electrical pole piece and negative electricity pole piece is selected for use: acetylene carbon black, one or more in conductive carbon fibre or the electrically conductive graphite;
The collector of described positive electrical pole piece and negative electricity pole piece is selected for use: aluminium foil, aluminium net, Copper Foil, copper mesh, nickel foam, nickel foil or nickel screen, plus plate current-collecting body and negative current collector can be selected same kind of collector, also can select different collectors;
The bonding agent of described positive electrical pole piece and negative electricity pole piece is selected for use: polytetrafluoroethylene (PTFE), homopolymerization or copolymerization vinylidene (PVDF), modified polyacrylic acid and ester class thereof, polyvinyl alcohol, sodium carboxymethylcellulose, described bonding agent both can be Powdered also can be emulsion form;
The used for electrolyte of described capacitor: organic system or inorganic system; Wherein, the electrolyte solvent of organic system is selected ethylene carbonate, propene carbonate, acetonitrile, gamma-butyrolacton or their mixed solvent for use, electrolyte salt can be selected tetraethyl tetrafluoroborate, tetraethyl tetrafluoro boric acid quaternary alkylphosphonium salt, four n-pro-pyl tetrafluoro boric acid quaternary alkylphosphonium salts, tetraethyl hexafluorophosphoric acid quaternary alkylphosphonium salt, lithium hexafluoro phosphate or LiBF4 for use, and described concentration of electrolyte is 0.1～5 mol; The electrolyte solvent of inorganic system is a water, and electrolyte salt is selected sulfuric acid, sodium sulphate, potassium hydroxide for use, and described concentration of electrolyte is 1～10 mol.
Described porous isolating membrane is selected for use: polyethylene film, polypropylene screen or they polymer-modified, perhaps select nonwoven fabrics or cellulose for use.
7. according to claim 4 or 5 described button ultracapacitors, it is characterized in that:
Positive electrode active materials and negative active core-shell material are selected for use: porous activated carbon 85 weight portions;
The conductive agent of positive electrical pole piece and negative electricity pole piece is selected for use: acetylene carbon black 5 weight portions;
The bonding agent of positive electrical pole piece and negative electricity pole piece is selected for use: equal Kynoar (PVDF) powder 10 weight portions;
Equal Kynoar (PVDF) powder with 10 weight portions is dissolved in the n-methlpyrrolidone (NMP) of 250 weight portions fully earlier, and then the porous activated carbon of 85 weight portions, the acetylene carbon black of 5 weight portions are mixed, stir, disperse to make uniform sizing material with it.
8. method of making the described button ultracapacitor of claim 1～7 is characterized in that comprising:
A. ultracapacitor positive electrode active materials, conductive agent, binding agent are added solvent according to described weight portion and become anode sizing agent; Super capacitor anode active material, conductive agent, binding agent are added solvent according to described weight portion become cathode size;
B. anode sizing agent that step a is made and cathode size evenly are coated on the metal collector respectively, obtain positive electrical pole piece and negative electricity pole piece;
C. cut porous isolating membrane;
D. dried positive electrical pole piece, porous isolating membrane and negative electricity pole piece are reeled successively and obtain rolling up core;
E. the positive strap on the positive electrical pole piece is connected in anodal cap, the negative pole brace on the negative electricity pole piece is connected in the negative pole cap;
F. add electrolyte;
G. be packaged into the button ultracapacitor.
9. the method for manufacturing button ultracapacitor according to claim 8 is characterized in that:
(1) carry out the raw material proportioning according to following weight portion:
Porous activated carbon 85;
Acetylene carbon black 5;
Equal Kynoar (PVDF) powder 10;
Manufacture method: equal Kynoar (PVDF) powder with 10 weight portions is dissolved in the n-methlpyrrolidone (NMP) of 250 weight portions fully earlier, and then the porous activated carbon of 85 weight portions, the acetylene carbon black of 5 weight portions are mixed, stir, disperse to make uniform sizing material with it;
(2) adopt casting machine that its slurry evenly is coated in the metal aluminum foil surface according to the requirement of the electrode size of manufacturing ultracapacitor, the coating size can realize by the control to casting machine, 130 ℃ of vacuumize 5～60 minutes; According to same method, also apply slurry uniformly at the another side of aluminium foil, 100 ℃ of vacuumize 5～20 minutes; Make the electrochemical capacitor pole piece that both sides evenly apply the carbonaceous active material thus;
(3) cut above-mentioned ultracapacitor pole piece, weld positive strap and negative pole brace respectively and obtain ultracapacitor positive electrical pole piece and negative electricity pole piece;
(3) cut barrier film according to the requirement of barrier film size;
(4) a slice ultracapacitor positive electrical pole piece, a slice super capacitor anode electrode slice, a slice porous isolating membrane are wound on obtain square together or pie volume core;
(5) positive strap is connected in the anodal cap of button, the negative pole brace is connected in button negative pole cap;
(6) add electrolyte;
(7) be packaged into the button ultracapacitor.
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| CNA2007100170498A CN101165828A (en) | 2007-08-29 | 2007-08-29 | Buckle type electrochemical capacitor and its manufacture method |
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| CN101901691A (en) * | 2010-08-03 | 2010-12-01 | 清华大学 | Organic electrolyte-based micro super conductor and manufacturing method thereof |
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