KR101810625B1 - Mehtod for manufacturing electrode of electric double layer capacitor - Google Patents

Mehtod for manufacturing electrode of electric double layer capacitor Download PDF

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KR101810625B1
KR101810625B1 KR1020160032746A KR20160032746A KR101810625B1 KR 101810625 B1 KR101810625 B1 KR 101810625B1 KR 1020160032746 A KR1020160032746 A KR 1020160032746A KR 20160032746 A KR20160032746 A KR 20160032746A KR 101810625 B1 KR101810625 B1 KR 101810625B1
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South Korea
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activated carbon
electrode
powder
layer
mixed
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KR1020160032746A
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Korean (ko)
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KR20170108597A (en
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김기효
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삼화전기 주식회사
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
    • H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22—Electrodes
    • H01G11/30—Electrodes characterised by their material
    • H01G11/32—Carbon-based
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/66—Current collectors
    • H01G11/68—Current collectors characterised by their material
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Abstract

The present invention relates to a method of manufacturing an electrode of an electric double layer capacitor capable of improving the energy density while maintaining the output density of the electric double layer capacitor by mixing activated carbon and one of the positive electrode and negative electrode material powder into the electrode of the electric double layer capacitor According to another aspect of the present invention, there is provided a method of manufacturing an electrode of an electric double layer capacitor, comprising: preparing a metal current collector; Applying an activated carbon layer to the surface of the metal current collector; And applying a mixed electrode layer to the surface of the activated carbon layer. In the step of applying the mixed electrode layer, the mixed electrode layer is formed by mixing the activated carbon powder and the electrode auxiliary material powder, and the electrode auxiliary material powder includes the anode material and the anode material One of LiCoO 2 and LiMn 2 O 4 is used as an anode material, and one of graphite, soft carbon and hard carbon is used as an anode material.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electrode for an electric double layer capacitor,

The present invention relates to a method of manufacturing an electrode of an electric double layer capacitor, and more particularly to a method of manufacturing an electrode of an electric double layer capacitor, in which an electrode of an electric double layer capacitor is formed by mixing activated carbon with one of anode and cathode powder, thereby improving the energy density while maintaining the output density of the electric double layer capacitor To an electrode for an electrode of an electric double layer capacitor.

Electric double layer capacitors (EDLC) are being applied to smart phones, hybrid vehicles, energy storage devices for electric vehicles and solar power generation. Such an electric double layer capacitor uses an activated carbon as a cathode material or an anode material, and disclosed in the prior art to which a method for manufacturing an activated carbon is attached.

Korean Patent Laid-Open Publication No. 2011-0063472 (Patent Document 1) relates to a method for manufacturing carbonaceous materials for electric double layer capacitors, and a method for manufacturing carbonaceous materials for electric double layer capacitors, In order to produce carbon materials using carbon materials, the starting materials are calcined under an oxidizing atmosphere, carbon particles are controlled in particle size, and then carbon materials are activated.

In the conventional electric double layer capacitor as in Patent Document 1, since the electrode material is formed of activated carbon, there is a problem that the output density is high but the energy density is low.

Patent Document 1: Korean Published Patent Application No. 2011-0063472 (Published on June 10, 2011)

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide an electric double layer capacitor which can improve the energy density while maintaining the output density of the electric double layer capacitor by mixing the electrode of the electric double layer capacitor with one of the anode and cathode powder, And a method of manufacturing an electrode of an electric double layer capacitor.

A method of manufacturing an electrode of an electric double layer capacitor according to the present invention includes: preparing a metal current collector; Applying an activated carbon layer to the surface of the metal current collector; And applying a mixed electrode layer to the surface of the activated carbon layer, wherein in the step of applying the mixed electrode layer, the mixed electrode layer is formed by mixing activated carbon powder and an electrode auxiliary material powder, and the electrode auxiliary material powder comprises an anode material One of the cathode materials is selected and used, and one of LiCoO 2 and LiMn 2 O 4 is used as the cathode material, and the anode material is selected from the group consisting of graphite, soft carbon, and hard carbon One is used.

The method for manufacturing an electrode of an electric double layer capacitor of the present invention has an advantage that an electrode of an electric double layer capacitor is formed by mixing active carbon and one of anode and cathode powder to maintain the output density of the electric double layer capacitor and improve the energy density .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram showing a method of manufacturing an electrode of an electric double layer capacitor of the present invention;
FIGS. 2 to 4 are cross-sectional views illustrating a method of manufacturing an electrode of an electric double layer capacitor of the present invention shown in FIG. 1,
5 is a cross-sectional view of an electric double layer capacitor manufactured using an electrode manufactured by the method of manufacturing an electrode of the electric double layer capacitor of the present invention shown in FIG.

Hereinafter, embodiments of a method of manufacturing an electrode of an electric double layer capacitor of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 to 4, in the method of manufacturing the electrode 10 of the electric double layer capacitor of the present invention, a metal current collector 11 is prepared (S10). When the metal current collector 11 is prepared, the active carbon layer 12 is coated on the surface of the metal current collector 11 (S20). When the activated carbon layer 12 is applied, the mixed electrode layer 13 is applied to the surface of the activated carbon layer 12 (S30). In the step S30 of applying the mixed electrode layer 13, the mixed electrode layer 13 is formed by mixing the activated carbon powder AP and the electrode auxiliary material powder HP, and the electrode auxiliary material powder HP is formed by mixing the anode material and the cathode One of the materials is selected and used. One of LiCoO 2 and LiMn 2 O 4 is used as an anode material, and one of graphite, soft carbon and hard carbon is used as an anode material. do.

The method for manufacturing the first electrode 10 of the electric double layer capacitor of the present invention will be described in detail as follows.

The step S10 of preparing the metal current collector 11 is performed by connecting the anode electrode 120 and the cathode electrode 130 to the outside and the electric device (not shown) And the metal current collector 11 is made of an aluminum foil having a thickness Th1 of 50 to 200 mu m. Here, FIG. 2 shows a cross-sectional view of the metal current collector 11.

When the metal collector 11 is prepared, the activated carbon layer 12 is applied. The step S20 of applying the activated carbon layer 12 to the surface of the metal current collector 11 is performed by using a silk printing method in which the activated carbon powder AP is formed into a paste state as shown in Figs. 1 and 3, Is applied to the surface of the metal current collector 11 so as to be thinner than the thickness Th3 of the mixed electrode layer 13 to form the activated carbon layer 12. [ That is, the activated carbon layer 12 is prepared by applying a powdery activated carbon (AP) prepared in a paste state by a known method for producing a paste by a silk printing method and then drying it using a drying device (not shown). The thickness Th2 of the activated carbon layer 12 that has been dried is 50 to 150 占 퐉. The activated carbon powder AP has a plurality of pores H and an average particle diameter D1 of 2 to 25 占 퐉 Is used. An average particle diameter (D2) of a plurality of pores (H) is 100 to 300 nm. The average particle diameter D2 of the plurality of pores H is set to maximize the surface area of the activated carbon powder AP to increase the energy density. 3 shows a cross-sectional view of the state in which the active carbon layer 12 is applied on the surface of the metal current collector 11 so that a part of the metal current collector 11 is exposed.

When the activated carbon layer 12 is applied and dried, the mixed electrode layer 13 is applied. The step S40 of applying the mixed electrode layer 13 to the surface of the activated carbon layer 12 may be performed by mixing the activated carbon powder AP and the electrode auxiliary material powder HP as shown in FIGS. Is applied to the surface of the activated carbon layer 12 by a post-silk printing method to form the mixed electrode layer 13. [ That is, the mixed electrode layer 13 is formed by mixing one of activated carbon powder (AP), anode material powder (PP) and anode material powder (NP) mixed in a paste state by a known method for producing a paste by a silk printing method Followed by drying using a drying device (not shown). Here, FIG. 4 shows a cross-sectional view of a state in which the mixed electrode layer 13 is coated on the surface of the activated carbon layer 12.

The thickness Th3 of the dried mixed electrode layer 13 is formed to be 160 to 250 占 퐉 so as to be thicker than the thickness Th2 of the activated carbon layer 12. [ The mixed electrode layer 13 mixes the active carbon powder AP and the electrode auxiliary material powder HP so that the activated carbon powder AP is mixed more than the electrode auxiliary material powder HP in the paste state. For example, the mixed electrode layer 13 is mixed with 60 to 70 wt% of the activated carbon powder AP and 30 to 40 wt% of the electrode auxiliary material powder HP to form a paste state. When the electrode 10 of the present invention is applied to the electric double layer capacitor by mixing the activated carbon powder AP with more than the electrode auxiliary material powder HP in forming the mixed electrode layer 13 as described above, So as to improve the energy density while maintaining the output density characteristic.

The activated carbon powder AP used for forming the mixed electrode layer 13 has a plurality of pores H and an average particle diameter D3 of 2 to 25 mu m, (D4) is 2 to 100 nm smaller than the average particle diameter (D2) of the plurality of pores (H) formed in the activated carbon powder (AP) of the activated carbon layer (12). The average particle size D5 of the electrode auxiliary material powder HP is 100 to 300 nm so as to be larger than the average particle size D4 of the pore H of the activated carbon powder AP. That is, by forming the pores H of the activated carbon powder AP used in the mixed electrode layer 13 to be smaller than the positive electrode material powder PP or the electrode auxiliary material powder HP, the electrode- The surface area of the activated carbon powder AP is prevented from being reduced due to penetration into the pores H of the AP. The average particle diameter D4 of the pores H formed in the activated carbon powder AP forming the mixed electrode layer 13 is set to be smaller than the average particle diameter D5 of the electrode auxiliary material powder HP, The electrode auxiliary material powder HP adheres to the surface of the activated carbon powder AP by preventing the auxiliary material powder HP from penetrating into the inside of the pores H to reduce the surface area of the activated carbon powder AP, In order to prevent it from getting smaller.

An electric double layer capacitor was prepared by using the electrode 10 manufactured by the above-described method of manufacturing an electrode for an electric double layer capacitor of the present invention.

 The electric double layer capacitor to which the electrode 10 manufactured by the method for manufacturing an electrode of the electric double layer capacitor of the present invention is applied has the case 110, the anode electrode 120, the cathode electrode 130, the separator 140, And an electrolyte (150).

The case 110 generally supports the electric double layer capacitor as shown in FIG. 5, and is formed of an insulating material.

The anode electrode 120 is disposed inside the case 110 and is manufactured by the electrode manufacturing method of the electric double layer capacitor of the present invention shown in Figs. 1 and 2, and includes a metal collector 11, an activated carbon layer 12, And a mixed electrode layer (13).

The metal collector 11 supports the anode electrode 120 and the activated carbon layer 12 is formed on one surface of the metal collector 11 so that a part of the metal collector 11 is partially exposed and used as an anode . The mixed electrode layer 13 is formed on one surface of the activated carbon layer 12 and is formed by mixing the activated carbon powder AP and the electrode auxiliary material powder HP. Here, the electrode auxiliary material powder (HP) is made of an anode material, and one of LiCoO 2 powder and LiMn 2 O 4 powder is used as an anode material.

The cathode electrode 130 is disposed on one side or the other side of the anode electrode 120 on the inner side of the case 110 and on the inner side of the case 110. The electric double layer capacitor of the present invention shown in Figs. And comprises a metal current collector 11, an activated carbon layer 12, and a mixed electrode layer 13.

The metal collector 11 supports the cathode electrode 130 and the activated carbon layer 12 is formed on the other surface of the metal collector 11 so that a part of the metal collector 11 is partially exposed and used as a cathode . The mixed electrode layer 13 is formed on the other surface of the activated carbon layer 12 and is formed by mixing the activated carbon powder AP and the electrode auxiliary material powder HP. Here, the electrode auxiliary material powder HP is made of a negative electrode material, and one of graphite, soft carbon and hard carbon is used as a negative electrode material.

An aluminum foil having a thickness (Th1: shown in FIG. 2) of 50 to 200 占 퐉 is used as the metal current collector 11 applied to the anode electrode 120 and the cathode electrode 130 described above. The activated carbon layer 12 is formed to have a thickness of 50 to 150 占 퐉 so that the thickness Th2 (shown in Fig. 3) is thinner than the thickness (Th3: shown in Fig. 4) of the mixed electrode layer 13 by using the activated carbon powder AP The activated carbon powder AP has a plurality of pores H and an average particle diameter D1 of 2 to 25 mu m and an average particle diameter D2 of the pores H of 100 to 300 nm Is used.

The mixed electrode layer 13 is formed to be 160 to 250 μm so that the thickness Th3 is larger than the thickness Th2 of the activated carbon layer 12 and the activated carbon powder AP is mixed more than the electrode auxiliary material powder HP . The activated carbon powder (AP) has a plurality of pores (H) formed therein and has an average particle diameter (D3) of 2 to 25 mu m. The average particle size D4 of the plurality of pores H formed in the activated carbon powder AP is smaller than the average particle size D2 of the plurality of pores H formed in the activated carbon powder AP forming the activated carbon layer 12. [ And the average particle size D5 of the electrode auxiliary material powder HP is 100 to 300 nm so as to be larger than the average particle size D4 of the pore H of the activated carbon powder AP.

3, the separator 140 is disposed between the anode electrode 120 and the cathode electrode 130 to prevent physical contact between the anode electrode 120 and the cathode electrode 130, , Polypropylene (PP) and a porous film are used.

The electrolyte 150 is injected into the case 110 as shown in FIG. 3, and a salt and an additive are mixed and used. One of ACN (acetonitrile), EC (ethylene carbonate) and PC (propylene carbonate) is used as the organic solvent used in the electrolyte 150 and the salt is one of LiBF 4 , LiPF 6 , LiClO 4 and LiAsF 6 and TEA ammonium, and triethylmethyl ammonium (TEMA). One of VC (vinylene carbonate) and VEC (vinyl ethylene carbonate) is used as an additive. Here, one of LiBF 4 , LiPF 6 , LiClO 4 and LiAsF 6 is such that lithium ions desorbed from the positive electrode material powder (PP) are transferred to the negative electrode material powder (NP) and inserted into the negative electrode material powder (NP) one of tetraethyl ammonium and triethylmethyl ammonium allows ions to be adsorbed and desorbed on the activated carbon powder AP on the anode electrode 120 and the cathode electrode 130, respectively.

As described above, the electric double layer capacitor using the electrode 10 manufactured by the method of manufacturing the electrode of the electric double layer capacitor of the present invention can be manufactured by mixing the electrode with one of the anode and cathode powder and the activated carbon, The energy density can be improved while maintaining the density characteristics.

The method of manufacturing an electrode of an electric double layer capacitor of the present invention is applied to the manufacturing industry of an electric double layer capacitor.

10: electrode
11: metal collector
12: Activated carbon layer
14: mixed electrode layer

Claims (6)

Preparing a metal current collector;
Applying an activated carbon layer to the surface of the metal current collector; And
And applying a mixed electrode layer to the surface of the activated carbon layer,
The step of applying the activated carbon layer to the surface of the metal current collector is performed by using a silk printing method in which the activated carbon powder is formed into a paste state and is coated on the surface of the metal current collector so as to be thinner than the thickness of the mixed electrode layer to form an activated carbon layer , The activated carbon layer is formed to have a thickness of 50 to 150 mu m, the activated carbon powder has a plurality of pores formed therein, an average particle diameter of 2 to 25 mu m, and an average particle diameter of the pores is 100 to 300 nm Is used,
In the step of applying the mixed electrode layer, the mixed electrode layer is formed by mixing activated carbon powder and an electrode auxiliary material powder, and the electrode auxiliary material powder is selected from one of an anode material and an anode material, and the anode material is LiCoO 2 LiMn 2 O 4 is used as the negative electrode material, and one of graphite, soft carbon, and hard carbon is used as the negative electrode material. The method according to claim 1,
Wherein the metal current collector is an aluminum foil having a thickness of 50 to 200 mu m in the step of preparing the metal current collector. delete The method according to claim 1,
The step of applying the mixed electrode layer to the surface of the activated carbon layer may be performed by mixing the activated carbon powder and the electrode auxiliary material powder to prepare a paste state and then applying the mixed powder to the surface of the activated carbon layer by a silk printing method to form a mixed electrode layer, Is formed to be 160 to 250 占 퐉 so as to be thicker than the thickness of the activated carbon layer. The method according to claim 1,
Wherein the mixed electrode layer is mixed with the activated carbon powder more than the electrode auxiliary material powder in the step of applying the mixed electrode layer to the surface of the activated carbon layer. The method according to claim 1,
Wherein the mixed electrode layer is formed by mixing 30 to 40 wt% of electrode auxiliary material powder in 60 to 70 wt% of activated carbon powder in the step of coating the mixed electrode layer on the surface of the activated carbon layer, and the activated carbon powder in the mixed electrode layer has a plurality of pores Wherein an average particle diameter of the pores is 2 to 100 nm smaller than an average particle diameter of a plurality of pores formed in the activated carbon powder of the activated carbon layer, Wherein an average particle diameter of the powder is 100 to 300 nm so as to be larger than an average particle diameter of pores of the activated carbon powder of the mixed electrode layer.
KR1020160032746A 2016-03-18 2016-03-18 Mehtod for manufacturing electrode of electric double layer capacitor KR101810625B1 (en)

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CN108766781B (en) * 2018-05-28 2020-05-08 浙江微创新能源有限公司 Positive electrode slurry, positive electrode plate and preparation method of positive electrode plate

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100700711B1 (en) * 2005-04-15 2007-03-27 주식회사 에너랜드 Hybrid electrical energy storage apparatus
KR101184777B1 (en) * 2011-09-19 2012-09-20 삼성전기주식회사 Electrode for an energe storage and mehtod for manufacturing the same
KR101287676B1 (en) * 2011-12-28 2013-08-23 삼성전기주식회사 Electrode of energy storage and method for manufacturing the same
JP2014022585A (en) * 2012-07-19 2014-02-03 Rohm Co Ltd Energy device electrode structure and manufacturing method therefor, and energy device
JP2014225574A (en) * 2013-05-16 2014-12-04 住友電気工業株式会社 Capacitor and charge and discharge method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100700711B1 (en) * 2005-04-15 2007-03-27 주식회사 에너랜드 Hybrid electrical energy storage apparatus
KR101184777B1 (en) * 2011-09-19 2012-09-20 삼성전기주식회사 Electrode for an energe storage and mehtod for manufacturing the same
KR101287676B1 (en) * 2011-12-28 2013-08-23 삼성전기주식회사 Electrode of energy storage and method for manufacturing the same
JP2014022585A (en) * 2012-07-19 2014-02-03 Rohm Co Ltd Energy device electrode structure and manufacturing method therefor, and energy device
JP2014225574A (en) * 2013-05-16 2014-12-04 住友電気工業株式会社 Capacitor and charge and discharge method thereof

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