JPH0786096A - Electric double layer capacitor and manufacturing method thereof - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a highly reliable electric double layer capacitor having a high decomposition voltage, a small internal resistance and no leakage. [Composition] A mixture 1 of phenolic activated carbon particles serving as a polarizable electrode through the rubber-like ion conductive electrolyte 5 composed of natural rubber / tetraethylammonium perchlorate / propylene carbonate and the rubber-like ion conductive electrolyte 5, 2 are arranged so as to face each other, and the upper member (sealing plate) 6 and the lower member (case) 7 of the casing are caulked and sealed with a polypropylene packing 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an all-solid-state small-sized large-capacity electric double layer capacitor and a method for manufacturing the same.

[0002]

2. Description of the Related Art In recent years, electric double layer capacitors have been widely used as a small power source for backing up a semiconductor memory. Further, there is a demand for the development of a more reliable capacitor with less self-discharge and no electrolyte leakage.

As a conventional technique in this field,
(1) A capacitor using a polycrystalline solid electrolyte having metal ion conductivity as an electrolyte is disclosed in, for example, Japanese Patent Application Laid-Open No. 5-312058.
There is one disclosed in Japanese Patent Laid-Open No. 3-61053. Specifically, a solid electrolyte having copper ion conductivity is used as the electrolyte.

Further, (2) a case where an organic solvent in which an electrochemically stable electrolyte salt is dissolved is used as an electrolytic solution and activated carbon powder is used as a polarizable electrode, for example, JP-A-49-68.
There is one disclosed in Japanese Laid-Open Patent Publication No. 254. Specifically, an organic electrolytic solution in which a peralkyl salt of tetraalkylammonium is dissolved in an organic solvent such as propylene carbonate is used as the electrolyte.

[0005]

However, in the electric double layer capacitor having the structure as described in (1) above, the breakdown voltage of the solid electrolyte of the polycrystalline body is as low as 0.6 V or less, so that the withstand voltage of the capacitor is increased. It was difficult to obtain a capacitor having excellent discharge characteristics because the internal resistance was small because the electric conductivity of the solid electrolyte was not sufficiently high.

Further, when the organic electrolytic solution as described in (2) above is used, it is difficult to completely prevent the electrolytic solution from leaking, and a capacitor having a high reliability in a wide temperature range can be obtained. It was difficult to make.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide an electric double layer capacitor having a higher decomposition voltage, a smaller internal resistance and a further less liquid leakage, and a method for manufacturing the same. .

[0008]

In order to achieve the above object, the electric double layer capacitor of the first invention according to the present invention comprises:
A rubber-like ion conductive electrolyte composed of a rubber matrix, an organic solvent and an electrolyte salt is used as the electrolyte, and activated carbon is used as the polarizable electrodes of the positive electrode and the negative electrode.

In the electric double layer capacitor of the second invention according to the present invention, a rubber-like ion conductive electrolyte composed of a rubber matrix, an organic solvent and an electrolyte salt is used as an electrolyte, and activated carbon is used as a polarizable electrode of a positive electrode. In addition, lithium or a metal capable of occluding and releasing lithium is used as the non-polarizable electrode of the negative electrode.

In the first or second construction, the rubber latex is preferably one selected from natural rubber, styrene-butadiene copolymer and butadiene-acrylonitrile copolymer.

In the first or second construction, the thermoplastic elastomer is preferably one selected from polystyrene type, polyolefin type, polyester type, polyurethane type and polyamide.

Further, in the first or second constitution, it is preferable that the organic solvent is one selected from propylene carbonate, gamma butyl lactone, or a mixed solvent thereof.

In the first or second structure, it is preferable that the electrolyte salt is one selected from tetraethylammonium perchlorate, tetraethylammonium borofluoride, and lithium perchlorate.

In the first or second construction, the polarizable electrode is preferably one selected from phenol-based, pitch-based, polyacrylonitrile (PAN) -based powdered or fibrous activated carbon. .

In the second structure, the metals capable of inserting and extracting lithium are zinc, bismuth, tin,
One metal selected from lead, cadmium, and indium, or various alloys which can be combined in the above metals are preferable.

The first method for producing an electric double layer capacitor according to the present invention is such that an electrolyte salt and a rubber latex or a thermoplastic elastomer are mixed and solidified, and an organic solvent is further added to give a rubbery ion conductivity. It is characterized in that an electrolyte is formed, polarizable electrodes made of activated carbon are opposed to each other through the rubber-like ion conductive electrolyte, and a collector made of a metal or a conductive resin is further formed on the polarizable electrode.

A second method for producing an electric double layer capacitor according to the present invention is to mix and solidify an electrolyte salt of lithium and a rubber latex or a thermoplastic elastomer,
Further, an organic solvent is added to form a rubber-like ion conductive electrolyte, and the polarizable electrode of the positive electrode made of activated carbon and lithium or a negative electrode made of a metal capable of inserting and extracting lithium through the rubber-like ion conductive electrolyte. The polarizable electrodes are opposed to each other, and a current collector made of metal or conductive resin is formed on the positive electrode and the negative electrode.

Further, in the construction of the first or second manufacturing method, the thermoplastic elastomer is polystyrene.
Polyolefin type, polyester type, polyurethane type,
It is preferably one selected from polyamides.

Further, in the constitution of the first or second manufacturing method, it is preferable that the organic solvent is one selected from propylene carbonate, gamma butyl lactone, or a mixed solvent thereof.

Further, in the structure of the first or second manufacturing method, it is preferable that the electrolyte salt is one selected from tetraethylammonium perchlorate, tetraethylammonium borofluoride, and lithium perchlorate.

In the construction of the first or second manufacturing method, the polarizable electrode is one selected from phenol-based, pitch-based, polyacrylonitrile (PAN) -based powdered or fibrous activated carbon. Is preferred.

In the structure of the second manufacturing method, the metal capable of inserting and extracting lithium is one metal selected from zinc, bismuth, tin, lead, cadmium and indium, or various combinations of the above metals. Is preferably an alloy of

[0023]

According to the constitution of the first invention of the present invention, since the rubber-like ion conductive electrolyte comprising the rubber matrix, the organic solvent and the electrolyte salt is used as the electrolyte, the decomposition voltage becomes high, and In the uncrystallized rubber matrix, the internal resistance can be reduced because the ions move more easily than in the crystal, and the rubber-like ion-conducting electrolyte is macroscopically solid so that leakage of liquid Not be reliable. In addition, since activated carbon is used for the polarizable electrodes of the positive electrode and the negative electrode, no electrochemical reaction occurs, and particularly no corrosion reaction occurs. Therefore,
It is possible to realize a highly reliable electric double layer capacitor without a portion that is deteriorated by an electrochemical reaction.

Further, according to the second aspect of the present invention, since the positive electrode polarizable electrode is made of activated carbon and the negative electrode non-polarizable electrode is made of lithium or a metal capable of absorbing and releasing lithium, Larger electric double layer capacity (eg,
It is possible to realize an electric double layer capacitor which is about twice as high as the first invention) and has high reliability.

In the first or second configuration,
The rubber latex is one selected from natural rubber, styrene-butadiene copolymer and butadiene-acrylonitrile copolymer, and the thermoplastic elastomer is one selected from polystyrene, polyolefin, polyester, polyurethane and polyamide. According to a preferred configuration in which the electrolyte salt is one selected from tetraethylammonium perchlorate, tetraethylammonium borofluoride, and lithium perchlorate, the internal resistance can be made particularly small and complete leakage can be achieved. It can be prevented.

In the first or second configuration,
According to a preferred configuration in which the polarizable electrode is one selected from phenol-based, pitch-based, polyacrylonitrile (PAN) -based powdered or fibrous activated carbon, these activated carbons have a higher purity than coconut shell charcoal. The electric double layer capacity can be further increased and the reliability can be enhanced because the electric double layer capacity is high and the specific surface area is about twice or more.

In the second structure, the metals capable of inserting and extracting lithium are zinc, bismuth, tin, lead,
According to a preferable structure in which one metal selected from cadmium and indium or various alloys that can be combined with the above metals are used, the charge / discharge characteristics can be improved and the reliability can be further increased.

According to the first or second manufacturing method of the present invention, the electric double layer capacitor having the first or second structure can be efficiently and reasonably manufactured.

[0029]

EXAMPLES The present invention will be described in more detail below with reference to examples. The rubber-like ion conductive electrolyte used in the present invention is a mixture of a rubber matrix, an organic solvent and an electrolyte salt having ion conductivity, and is not particularly limited, and various rubber matrices, organic solvents and electrolytes are used. be able to. Especially as a rubber matrix,
Since they are chemically stable, it is preferable to use natural rubber, styrene-butadiene copolymer, butadiene-acrylonitrile copolymer, polystyrene-based, polyolefin-based, polyester-based, polyurethane-based, or polyamide. Further, as the organic solvent, it is preferable to use propylene carbonate, gamma butyl lactone, a mixed solvent thereof or the like, because they are electrochemically stable and have a high boiling point. Further, as the electrolyte salt, it is preferable to use tetraethylammonium perchlorate, tetraethylammonium borofluoride, lithium perchlorate, or the like because they are electrochemically stable and have high electric conductivity.

When a combination of the above-mentioned rubber matrix, organic solvent and electrolyte salt is used as the rubber-like ion conductive electrolyte, it exhibits an electric conductivity of 10 ⁻³ S · cm ⁻¹ or more at room temperature.

The rubber-like ion conductive electrolyte used in the present invention is preferably in the form of a sheet, and more specifically, the one having a film thickness of about 500 to 1000 μm is preferably formed by a coating method or the like.

The activated carbon used as the polarizable electrode in the present invention is not particularly limited, and various kinds of activated carbon can be used. The form is preferably in the form of fine particles, and more specifically, the form having a particle size of 5 to 100 μm is preferable. Moreover, a fibrous material can also be used.

In particular, when a powdery or fibrous activated carbon of a phenol type, a pitch type, or a polyacrylonitrile type is used, the specific surface area is 2000 times as large as that of palm shell coal or more.
m ² g ^-1 and the pore size is 2 to 4n
Since it can be controlled in the range of m, the electric double layer capacity can be increased.

Further, as the non-polarizable electrode of the negative electrode in the second aspect of the present invention, it is preferable to use lithium, a metal capable of inserting and extracting lithium, or silver. In particular, if a single metal selected from zinc, bismuth, tin, lead, cadmium, and indium as the metal capable of inserting and extracting lithium is used, or various alloys that can be combined in the above metals are used, the charge and discharge characteristics of the electric double layer capacitor can be obtained. Can be improved.

The present invention will be described in more detail with reference to specific examples. Example 1 0.5 mol of tetraethylammonium perchlorate was dissolved in natural rubber, the mixed solution was solidified at room temperature, and then dried at 40 ° C. for 3 hours to obtain a film having a thickness of 500 μm. A rubber-like sheet was produced. Further, this sheet was immersed in a propylene carbonate solution in a dry atmosphere to absorb the solution, and then the excess solution adhering to the surface was removed to prepare a rubber-like ion conductive electrolyte. The electric conductivity of this rubbery ion conductive electrolyte was 4 × 10 ⁻³ S · cm ⁻¹ at room temperature. As the polarizable electrode, phenol-based activated carbon particles having a specific surface area of 2000 m ² g ^-1 (average particle size 20 μm) were used.

Further, 0.5 mol of tetraethylammonium perchlorate and activated carbon particles were mixed with natural rubber, solidified at room temperature, and dried at 40 ° C. for 3 hours to obtain activated carbon particles and natural rubber, respectively. 50 to 50
A polarizable electrode having a film thickness of 500 μm mixed in a weight ratio of was prepared. Further, this sheet was immersed in a propylene carbonate solution in a dry atmosphere to absorb the solution, and then the excess solution adhering to the surface was removed and dried at 40 ° C. for 3 hours.

A coin-type electric double layer capacitor was constructed by using the rubber-like ion conductive electrolyte sheet and the polarizable electrode produced as described above. The schematic sectional view is shown in FIG. In FIG. 1, 1 and 2 are polarizable electrodes, 3 and 4,
Is a current collector made of stainless steel mesh and 5 is a rubber-like ion conductive electrolyte.

A current collector 3 via an ion-conducting electrolyte 5,
4 facing each other, the upper member 6 of the casing (sealing plate),
The lower member 7 (case) is made of polypropylene packing 8
The caulking was sealed via. Stainless steel was used for the upper member 6 and the lower member 7. The above series of steps was performed in a dry atmosphere.

After charging this capacitor at 2.0 V,
When discharged at a constant current of 10 μA, the electric capacity was 0.2 F,
An impedance of 210Ω was obtained. When 2.0 V was constantly applied in the atmosphere of 70 ° C., the capacity reduction rate after 1000 hours was 19% with respect to the initial capacity.

As the rubber matrix, styrene-butadiene copolymer or butadiene-polymer is used instead of natural rubber.
Even when the acrylonitrile copolymer was used, it was possible to produce a capacitor having substantially the same characteristics as the above.

Further, even if gamma-butyl lactone or a mixed solvent of propylene carbonate and gamma-butyl lactone was used as the organic solvent in place of propylene carbonate, a capacitor having substantially the same characteristics as the above could be manufactured. .

Further, even if tetraethylammonium borofluoride or lithium perchlorate was used as the electrolyte salt instead of tetraethylammonium perchlorate, a capacitor having almost the same characteristics as the above could be produced.

Further, even if pitch-based or polyacrylonitrile (PAN) -based activated carbon particles were used in place of the phenol-based activated carbon particles, the same characteristics as those of the above capacitor were exhibited.

On the other hand, a coin-type electric double layer capacitor having a similar structure was prepared using an organic electrolytic solution prepared by dissolving a conventional tetraalkylammonium perchlorate in an organic solvent of propylene carbonate, and was prepared under an atmosphere of 70 ° C. Always 2.
When 0 V was applied, the capacity reduction rate after 1000 hours was 28% with respect to the initial capacity. After the end of this test, leakage was found in 0.9% of the conventional capacitors.

(Embodiment 2) In the same manner as in Embodiment 1,
A 500 μm film was obtained by dissolving 0.5 mol of tetraethylammonium perchlorate in polystyrene elastomer (hard phase polystyrene, soft phase polybutadiene), solidifying the mixed solution at room temperature, and drying at 40 ° C. for 3 hours. A rubbery sheet having a thickness was produced. Further, this sheet was immersed in a propylene carbonate solution in a dry atmosphere to absorb the solution, and then the excess solution adhering to the surface was removed and dried at 40 ° C. for 3 hours. The electric conductivity of this rubbery ion conductive electrolyte was 8 × 10 ⁻³ S · cm ⁻¹ at room temperature. Also,
As the polarizable electrode, phenol-based activated carbon particles (average particle size 20 μm) having a specific surface area of 2000 m ² g ⁻¹ were used.

Further, 0.5 mol of tetraethylammonium perchlorate and activated carbon particles were mixed with polystyrene elastomer, solidified at room temperature, and dried at 40 ° C. for 3 hours to obtain 50 parts of activated carbon particles and 50% polystyrene elastomer, respectively. A polarizable electrode having a film thickness of 500 μm mixed in a weight ratio of 50 was prepared. Further, this sheet was immersed in a propylene carbonate solution in a dry atmosphere to absorb the solution, and then the excess solution adhering to the surface was removed and dried at 40 ° C. for 3 hours.

A coin-type electric double layer capacitor similar to that shown in FIG. 1 was constructed using the rubber-like ion conductive electrolyte sheet and the polarizable electrode produced as described above. The above series of steps was performed in a dry atmosphere.

This capacitor was charged at 2.0 V and then discharged at a constant current of 10 μA.
3F and an impedance of 110Ω were obtained. When 2.0 V was constantly applied in an atmosphere of 70 ° C., the capacity reduction rate after 1000 hours was 16% with respect to the initial capacity.

As the thermoplastic elastomer, instead of polystyrene type, polyolefin type (hard phase polyethylene, soft phase butyl rubber), polyester type (hard phase polyester, soft phase polyether), polyurethane type (hard phase urethane, soft phase poly). By using (ether) or polyamide (hard phase polyamide, soft phase polyether), a capacitor having almost the same characteristics as the above could be manufactured.

Further, even if gamma-butyl lactone or a mixed solvent of propylene carbonate and gamma-butyl lactone was used as the organic solvent instead of propylene carbonate, a capacitor having almost the same characteristics as the above could be produced. .

Further, even if tetraethylammonium borofluoride or lithium perchlorate was used as the electrolyte salt instead of tetraethylammonium perchlorate, a capacitor having substantially the same characteristics as the above could be produced.

Further, even if pitch-based or polyacrylonitrile (PAN) -based activated carbon particles were used in place of the phenol-based activated carbon particles, the same characteristics as those of the above capacitor were exhibited.

On the other hand, a coin-type electric double layer capacitor having a similar structure was prepared by using an organic electrolytic solution prepared by dissolving a conventional tetraalkylammonium perchlorate in an organic solvent of propylene carbonate, and under an atmosphere of 70 ° C. Always 2.
When 0 V was applied, the capacity reduction rate after 1000 hours was 28% with respect to the initial capacity. After the end of this test, leakage was found in 0.9% of the conventional capacitors.

(Embodiment 3) In the same manner as in Embodiment 2,
Dissolve 0.5 mol of lithium perchlorate in polystyrene elastomer (hard phase polystyrene, soft phase polybutadiene), solidify this mixed solution at room temperature, and
A rubber-like sheet having a film thickness of 500 μm was produced by drying at 3 ° C. for 3 hours. Further, this sheet was immersed in a propylene carbonate solution in a dry atmosphere to absorb the solution, and then the excess solution adhering to the surface was removed and dried at 40 ° C. for 3 hours. The electric conductivity of this rubber-like ion conductive electrolyte is 8.
It was 6 × 10 ⁻³ S · cm ⁻¹ . As the polarizable electrode, phenol-based activated carbon particles having a specific surface area of 2000 m ² g ^-1 (average particle size 20 μm) were used.

Further, 0.5 mol of lithium perchlorate and activated carbon particles were mixed with polystyrene elastomer,
By solidifying at room temperature, a polarizable electrode having a thickness of 500 μm was produced in which activated carbon particles and polystyrene elastomer were mixed in a weight ratio of 50:50, respectively. further,
This sheet was immersed in a propylene carbonate solution in a dry atmosphere to absorb the solution, and then the excess solution adhering to the surface was removed and dried at 40 ° C. for 3 hours.

A positive electrode comprising activated carbon particles and polystyrene elastomer produced as described above, and a thickness of 100 μm
A coin-type electric double layer capacitor was constructed by using the negative electrode made of the lithium metal foil of. The schematic sectional view is shown in FIG. In FIG. 2, 9 is a positive electrode made of a mixture of a rubbery ion conductive electrolyte and activated carbon, 3 and 4 are collectors made of stainless steel mesh, and 10 is a negative electrode made of lithium metal foil.

The current collectors 3 and 4 are opposed to each other with the rubber-like ion conductive electrolyte 5 interposed therebetween, and the upper member 6 (sealing plate) and the lower member 7 (case) of the casing are caulked and sealed with a polypropylene packing 8. did. Stainless steel was used for the upper member 6 and the lower member 7. In addition, the above series of steps,
It was performed under a dry atmosphere.

This capacitor was charged at 2.4 V and then discharged at a constant current of 10 μA.
5F and an impedance of 150Ω were obtained. When 2.4 V was constantly applied in the atmosphere of 70 ° C., the capacity reduction rate after 1000 hours was 14% with respect to the initial capacity.

As the thermoplastic elastomer, instead of polystyrene type, polyolefin type (hard phase polyethylene, soft phase butyl rubber), polyester type (hard phase polyester, soft phase polyether), polyurethane type (hard phase urethane, soft phase poly). By using (ether) or polyamide (hard phase polyamide, soft phase polyether), a capacitor having almost the same characteristics as the above could be manufactured.

Further, even if gamma-butyl lactone or a mixed solvent of propylene carbonate and gamma-butyl lactone was used as the organic solvent in place of propylene carbonate, a capacitor having substantially the same characteristics as the above could be produced.

Further, even if tetraethylammonium borofluoride or tetraethylammonium perchlorate was used as the electrolyte salt instead of lithium perchlorate, a capacitor having substantially the same characteristics as the above could be manufactured.

(Embodiment 4) The thickness of Embodiment 3 is 300 μm.
m lithium metal foil negative electrode instead of Pb (75%)-C
A capacitor was constructed using a negative electrode obtained by electrochemically alloying lithium metal (10 mg) with an alloy (100 mg) composed of d (25%). Other configurations are the same as those in FIG.

When this capacitor was charged at 2.4 V and then discharged at a constant current of 10 μA, the capacity was 0.46.
F, an impedance of 170Ω was obtained. When 3.0 V was constantly applied in the atmosphere of 70 ° C., the capacity reduction rate after 1000 hours was 13% with respect to the initial capacity. Furthermore, this capacitor is 1000V in the voltage range of 2-3V.
After repeated charge and discharge, the capacity was 5 compared to the initial value.
It fell by%.

[0064]

As described above, according to the constitution of the first invention of the present invention, since the rubber-like ion conductive electrolyte comprising the rubber matrix, the organic solvent and the electrolyte salt is used as the electrolyte, The decomposition voltage becomes high, and
In the uncrystallized rubber matrix, the internal resistance can be reduced because the ions move more easily than in the crystal, and the rubber-like ion-conducting electrolyte is macroscopically solid and does not leak. It will be reliable.
In addition, since activated carbon is used for the polarizable electrodes of the positive electrode and the negative electrode, no electrochemical reaction occurs, and particularly no corrosion reaction occurs. Therefore, it is possible to realize a highly reliable electric double layer capacitor without a portion that is deteriorated by an electrochemical reaction.

According to the second aspect of the present invention,
Since the positive electrode polarizable electrode uses activated carbon and the negative electrode non-polarizable electrode uses lithium or a metal capable of occluding and releasing lithium, the electric double layer capacity is larger (for example, the first
It is possible to realize an electric double layer capacitor which is about twice as high as that of the invention) and has high reliability.

In the first or second configuration,
The rubber latex is one selected from natural rubber, styrene-butadiene copolymer and butadiene-acrylonitrile copolymer, and the thermoplastic elastomer is one selected from polystyrene, polyolefin, polyester, polyurethane and polyamide. According to a preferred configuration in which the electrolyte salt is one selected from tetraethylammonium perchlorate, tetraethylammonium borofluoride, and lithium perchlorate, the internal resistance can be made particularly small, and complete leakage can be achieved. It can be prevented.

In the first or second configuration,
According to a preferred configuration in which the polarizable electrode is one selected from phenol-based, pitch-based, polyacrylonitrile (PAN) -based powdered or fibrous activated carbon, these activated carbons have a higher purity than coconut shell charcoal. The electric double layer capacity can be further increased and the reliability can be enhanced because the electric double layer capacity is high and the specific surface area is about twice or more.

In the second structure, the metals capable of inserting and extracting lithium are zinc, bismuth, tin, lead,
According to a preferable structure in which one metal selected from cadmium and indium or various alloys that can be combined with the above metals are used, the charge / discharge characteristics can be improved and the reliability can be further increased.

Further, according to the first or second manufacturing method of the present invention, the electric double layer capacitor having the first or second structure can be efficiently and rationally manufactured.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of an electric double layer capacitor according to the present invention.

FIG. 2 is a schematic cross-sectional view showing another embodiment of the electric double layer capacitor according to the present invention.

[Explanation of symbols]

 1, 2 Mixture of polar electrode and rubber-like ionic electrolyte 3, 4 Current collector 5 Rubber-like ionic conductive electrolyte 6 Upper member (sealing plate) 7 Lower member (case) 8 Packing 9 Positive electrode 10 Negative electrode

Claims (10)

[Claims] 1. An electric double layer capacitor in which a rubber-like ion conductive electrolyte comprising a rubber matrix, an organic solvent and an electrolyte salt is used as the electrolyte, and activated carbon is used as the polarizable electrodes of the positive electrode and the negative electrode. 2. A rubber-like ion conductive electrolyte comprising a rubber matrix, an organic solvent and an electrolyte salt is used as the electrolyte, activated carbon is used as the polarizable electrode of the positive electrode, and lithium or lithium is occluded as the nonpolarizable electrode of the negative electrode. Electric double layer capacitor using a metal that can be released. 3. An electrolyte salt and a rubber latex or a thermoplastic elastomer are mixed and solidified, and an organic solvent is further added to form a rubber-like ion conductive electrolyte, and activated carbon is passed through this rubber-like ion conductive electrolyte. A method of manufacturing an electric double-layer capacitor, wherein polarizable electrodes made of, are opposed to each other, and a collector made of metal or conductive resin is formed on the polarizable electrodes. 4. An electrolyte salt of lithium and a rubber latex or a thermoplastic elastomer are mixed and solidified, and an organic solvent is further added to form a rubber-like ion conductive electrolyte. Positive electrode polarizable electrode made of activated carbon and lithium or lithium is occluded,
A method for producing an electric double layer capacitor, comprising: disposing a non-polarizable electrode of a negative electrode made of a metal that can be released, and further forming a current collector made of a metal or a conductive resin on the positive and negative electrodes. 5. The rubber latex is natural rubber or styrene.
It is one selected from a butadiene copolymer and a butadiene-acrylonitrile copolymer, The manufacturing method of the electric double layer capacitor according to claim 1 or 2 or the electric double layer capacitor according to claim 3 or 4. 6. The electric double layer capacitor according to claim 1 or 2, or the thermoplastic double elastomer according to claim 3 or 4, wherein the thermoplastic elastomer is one selected from polystyrene type, polyolefin type, polyester type, polyurethane type and polyamide. Method for manufacturing electric double layer capacitor. 7. The electric double layer capacitor according to claim 1 or 2, or the electric double layer capacitor according to claim 3 or 4, wherein the organic solvent is one selected from propylene carbonate, gamma butyl lactone, or a mixed solvent thereof. Method of manufacturing multilayer capacitor. 8. The electrolyte salt is one selected from tetraethylammonium perchlorate, tetraethylammonium borofluoride, and lithium perchlorate.
The electric double layer capacitor according to claim 3 or 4.
A method for manufacturing the electric double layer capacitor according to. 9. The polarizable electrode is phenol-based, pitch-based,
The method for producing the electric double layer capacitor according to claim 1 or 2, or the electric double layer capacitor according to claim 3 or 4, which is one selected from polyacrylonitrile (PAN) -based powdery or fibrous activated carbon. 10. The electricity according to claim 2, wherein the metal capable of inserting and extracting lithium is one metal selected from zinc, bismuth, tin, lead, cadmium, and indium, or various alloys which can be combined in the metal. A method for manufacturing a double layer capacitor or the electric double layer capacitor according to claim 4.