KR100274890B1 - Method for manufacturing electrode of secondary battery - Google Patents

Method for manufacturing electrode of secondary battery Download PDF

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Publication number
KR100274890B1
KR100274890B1 KR1019980016435A KR19980016435A KR100274890B1 KR 100274890 B1 KR100274890 B1 KR 100274890B1 KR 1019980016435 A KR1019980016435 A KR 1019980016435A KR 19980016435 A KR19980016435 A KR 19980016435A KR 100274890 B1 KR100274890 B1 KR 100274890B1
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South Korea
Prior art keywords
binder
electrode
active material
electrode substrate
secondary battery
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KR1019980016435A
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Korean (ko)
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KR19990084565A (en
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이진욱
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김순택
삼성에스디아이주식회사
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0404—Methods of deposition of the material by coating on electrode collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/621—Binders
    • 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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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

PURPOSE: Provided is a method for manufacturing electrode capable of preventing the falling-off of active material in battery which can be charged and discharged, and substantially enhancing a capability of the battery. CONSTITUTION: The method comprises the steps of disposing a binder(16) to the surface of electrode substrate(10) in the pole plate group, and disposing a slurry of active material containing a binder(16) to the top of the binder. The battery is manufactured by winding a pole plate group consisting of separator cohered with electrode substrate(10) around can and inserting the pole plate group into the can, infusing an electrolyte into the can, providing cap assembly connected to anode substrate of the pole plate group, and insulating gasket which insulates the can from the cap assembly, and then sealing the battery.

Description

2차 전지의 전극 제조 방법Electrode Manufacturing Method of Secondary Battery

본 발명은 2차 전지에 관한 것으로서, 더 상세하게는 2차 전지의 내부에 삽입되는 전극의 제조 방법에 관한 것이다.The present invention relates to a secondary battery, and more particularly to a method for manufacturing an electrode inserted into the secondary battery.

2차 전지는 활물질이 도포된 양극 기재(substrate)와 음극 기재를 세퍼레이터와 함께 권취하여 캔에 삽입한 후 이 캔에 전해물질을 주입하고, 양극과 음극을 연결했을 때 전해액의 분자들과 활물질 사이에서 발생하는 물리화학적 반응을 이용한 전지인데, 기존의 1차 전지와 달리 전기 전자제품의 사용에 의해 소모된 에너지를 충전기에 의해 재충전하여 반복 사용할 수 있는 충전과 방전이 가능한 전지로서, 포터블화하는 전기 전자제품과 더불어 급속한 신장을 보이고 있다.In the secondary battery, a cathode and an anode substrate coated with an active material are wound together with a separator, inserted into a can, and an electrolyte is injected into the can, and when the cathode and the anode are connected, the molecules of the electrolyte and the active material are connected. It is a battery using a physicochemical reaction generated in the battery. Unlike conventional primary batteries, the battery can be recharged and recharged by recharging energy consumed by the use of electrical and electronic products by a charger. Along with electronics, it is growing rapidly.

이러한 2차 전지의 제조과정은, 양·음극판(이하 전극 기재)에 페이스트상으로 된 활물질 슬러리(slurry)를 일정두께로 도포한 후 롤 프레싱(Roll Pressing)하고 건조시키면, 소정의 두께를 갖는 전극 기재가 형성된다. 이 전극 기재를 원하는 크기로 절단한 다음 세퍼레이터와 함께 밀착시켜 극판군(群)을 형성하고, 밀착된 극판군을 스파이럴 모양으로 권취(捲取)한 후 소정의 캔에 넣는다. 그리고, 권취 중심부, 즉 극판군의 선단부에 지지체를 조립한다. 그런 다음 캔의 내부에 전해액을 주입한 후 캔의 개구부에 절연가스킷을 덧대고 그 내쪽에 안전변이 내장된 캡어셈블리를 위치시키고 캔을 밀봉한다.In the manufacturing process of such a secondary battery, an electrode having a predetermined thickness is applied to a positive electrode plate (hereinafter referred to as an electrode base material) by applying a paste-shaped active material slurry to a predetermined thickness, followed by roll pressing and drying. The substrate is formed. The electrode base material is cut to a desired size, and then adhered together with the separator to form a plate group. The plate group is wound in a spiral shape and placed in a predetermined can. And a support body is assembled to a winding center part, ie, the front-end | tip part of a pole plate group. Then, after the electrolyte is injected into the can, an insulating gasket is applied to the can's opening, and a cap assembly with a safety valve is placed inside the can and the can is sealed.

여기서 전극 기재에 활물질이 도포되는 과정을 살펴보면, 증점제, 도전제, 바인더가 페이스트(paste)상으로 혼합된 활물질 슬러리가 호퍼(hopper)의 내부에 일정 수위를 유지하며 충만되고, 시트(sheet)상으로 제조된 전극 기재는 구동로울러에 의해 테이크업(take up)되어서 호퍼 내부의 활물질 슬러리를 통과하는 데, 이 때 활물질 슬러리는 이의 내부에 설치된 충전로울러에 의해 가압되면서 전극 기재의 양면에 일정두께로 도포된다. 도포된 활물질 슬러리는 닥터블레이드(doctor blade)에 의해 규정치의 두께로 긁혀지고, 이후 고온분위기의 로(爐)를 거쳐 건조된다.Here, looking at the process of applying the active material to the electrode substrate, the active material slurry mixed with a thickener, a conductive agent, a binder in the form of a paste (fille) is filled while maintaining a certain level in the interior of the hopper (sheet) The electrode substrate manufactured by the present invention is taken up by a driving roller and passes through the active material slurry in the hopper, wherein the active material slurry is pressed by a filling roller installed therein to a predetermined thickness on both sides of the electrode substrate. Is applied. The applied active material slurry is scraped to a prescribed thickness by a doctor blade, and then dried through a furnace in a high temperature atmosphere.

이와같은 제조과정에서 도 4에 도시한 바와 같이 전극 기재(10)에 일정두께로 활물질(12)이 코팅되는 데, 전극 기재(10)는 Al, Ni, 동박을 사용하고, 이러한 전극 기재(10)와 활물질(12) 사이의 결합력을 높이기 위하여 활물질 슬러리에 바인더를 첨가한다.In this manufacturing process, as shown in FIG. 4, the active material 12 is coated on the electrode substrate 10 with a predetermined thickness. The electrode substrate 10 uses Al, Ni, and copper foil, and the electrode substrate 10 ) And a binder is added to the active material slurry in order to increase the bonding force between the active material 12 and the active material 12.

여기서 슬러리에 바인더가 너무 많이 첨가되면 활물질(12)의 양이 상대적으로 감소됨으로 전지의 성능이 저하되고, 너무 적게 함유되면 전극 기재(10)에 도포된 활물질이 탈락하는 문제점이 있어 적정량의 바인더를 슬러리에 함유해야만 한다.If too much binder is added to the slurry, the amount of the active material 12 is relatively reduced, and thus the performance of the battery is lowered. If too much binder is contained, there is a problem in that the active material applied to the electrode substrate 10 is dropped. Must be contained in the slurry.

그러나 슬러리에 적정량으로 바인더를 첨가하여도 전극 기재로 사용되는 알루미늄, 니켈 혹은 동박은 표면이 매끄럽기 때문에 슬러리를 도포할 때, 외부의 작은 힘에도 쉽게 벗겨지는 현상이 발생하고, 아울러 2차 전지의 충방전시 또는 외부에서의 작은 스트레스에도 전극 기재에서 활물질이 탈락하여 용량과 전지의 수명이 적어지는 주요인이 되며, 또한 리튬 이온 2차 전지의 경우에는 활물질의 탈락이 리튬 금속의 석출 원인이 될 수 있어 안전사고의 위험성마저 내포하고 있다.However, even if a binder is added in an appropriate amount to the slurry, aluminum, nickel, or copper foil used as an electrode substrate has a smooth surface, so when the slurry is applied, a phenomenon occurs that easily peels off even when the external force is applied. During charging and discharging or a small stress on the outside, the active material is dropped from the electrode base material, leading to a decrease in capacity and battery life. Also, in the case of a lithium ion secondary battery, the dropping of the active material may be a cause of precipitation of lithium metal. There is a risk of safety accidents.

이와 같은 종래의 문제점을 해결하기 위하여 본 발명은, 충방전이 가능한 2차 전지에서 활물질의 탈락을 방지할 수 있는 전극의 제조방법을 제공하는 것이 목적이다.In order to solve such a conventional problem, an object of the present invention is to provide a method for producing an electrode that can prevent the active material from falling off in a secondary battery capable of charging and discharging.

본 발명은 이러한 목적을 달성하기 위해서, 캔에 전극 기재와 세펄이터가 함께 밀착된 극판군을 권취하여 삽입하고, 이 캔의 내부에 전해물질을 주입하며, 상기 극판군의 양극 기재와 연결되는 캡어셈블리와 상기 캔과 캡어셈블리가 절연되게 하는 절연가스킷을 구비한 후 밀봉하는 구조로 이루어진 2차 전지의 전극 제조방법에 있어서, 상기 극판군의 전극 기재 표면에 1차로 바인더를 개재하고, 상기 바인더의 상부에 2차로 바인더가 함유된 활물질 슬러리를 개재함을 기술적 구성으로 한다. 특히 전극 기재에 1차로 개재된 바인더의 농도가 2차로 개재된 슬러리에 함유된 바인더의 농도와 같거나 많으며, 전극 기재에 1차로 개재된 바인더를 100 내지 200 도로 열처리하여 가교 결합시킨다.In order to achieve the above object, the present invention includes a cap that is wound and inserted into an electrode substrate and a separator group in close contact with the can, and injects an electrolytic material into the can, and is connected to the cathode substrate of the electrode plate. A method of manufacturing an electrode of a secondary battery having a structure including an assembly, an insulating gasket to insulate the can and the cap assembly, and sealing the electrode, wherein the electrode is first interposed with a binder on an electrode substrate surface of the electrode plate group. The technical configuration of interposing an active material slurry containing a binder in the upper portion is secondary. In particular, the concentration of the binder primarily interposed on the electrode substrate is equal to or greater than the concentration of the binder contained in the slurry interposed secondly, and the binder interposed primarily on the electrode substrate is heat-treated at 100 to 200 degrees to crosslink.

도 1은 본 발명에 관련된 2차 전지의 전극 기재에 1차로 바인더를 개재하는 장치를 도시한 개략도BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing an apparatus primarily interposing a binder on an electrode substrate of a secondary battery according to the present invention.

도 2는 본 발명에 관련된 2차 전지의 전극 기재에 2차로 활물질을 개재하는 장치를 도시한 개략도2 is a schematic view showing a device interposing an active material in a secondary electrode base of a secondary battery according to the present invention.

도 3은 본 발명에 관련된 2차 전지의 전극을 도시한 단면도3 is a cross-sectional view showing an electrode of a secondary battery according to the present invention.

도 4는 종래의 전극에 도포된 활물질을 도시한 단면도4 is a cross-sectional view showing an active material applied to a conventional electrode.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

4 : 호퍼 6 : 충전로울러4: hopper 6: charging roller

8 : 구동로울러 10 : 양·음극판8: driving roller 10: positive / negative plate

12 : 닥터블레이드 14 : 활물질12: doctor blade 14: active material

16 : 바인더16: binder

이하 본 발명에 관련된 바람직한 실시예를 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

참고로 본 발명을 설명함에 있어, 종래 기술에서 인용된 도면과 동일한 본 발명의 구성에 대해서는 설명의 명료성을 위해 동일한 부호를 사용한다.For reference, in describing the present invention, the same reference numerals are used for the clarity of the configuration of the present invention as the drawings cited in the prior art.

2차 전지의 제조과정은, Al, Ni, 동박으로 이루어진 전극 기재에 페이스트상으로 된 활물질 슬러리를 일정두께로 도포한 후 롤 프레싱하고 건조시키면, 일정두께의 활물질이 도포된 전극 기재가 형성된다.In the manufacturing process of the secondary battery, an electrode substrate made of Al, Ni, and copper foil is applied to a predetermined thickness of an active material slurry in a paste form, and then roll-pressed and dried to form an electrode substrate coated with an active material of a predetermined thickness.

이러한 전극 기재를 원하는 크기로 절단한 다음 세퍼레이터와 함께 밀착시켜 극판군을 형성하고, 밀착된 극판군의 선단부에 맨드렐(mandrel)을 끼워 스파이럴 모양으로 권취한 후 양극 기재에는 양극탭을, 음극기재에는 음극리드를 접속한다.The electrode substrate is cut to a desired size and then adhered together with the separator to form a plate group. The mandrel is wound around the tip of the plate group and wound in a spiral shape. Connect the negative lead.

그리고 극판군의 양단부에 절연링을 대면시킨 후 캔에 넣고, 음극리드를 캔의 내부 하단면에 용접한다. 이러한 캔의 내부에 전해액을 주입한 후 캔의 개구부에 절연가스킷을 덧대고 그 내쪽에 안전변이 내장된 캡어셈블리를 위치시킨 다음 캔을 밀봉한다.Then, both ends of the electrode group face the insulating ring and put it in the can, and the negative lead is welded to the inner bottom surface of the can. After the electrolyte is injected into the can, an insulating gasket is applied to the opening of the can, and a cap assembly having a safety valve is placed therein, and then the can is sealed.

이와같은 2차 전지의 제조과정에서 전극 기재의 양면에 활물질을 도포시키는 과정은 도 1과 도 2에 도시한 바와 같이 종래의 장치를 이용하여 이루어진다.The process of coating the active material on both sides of the electrode substrate in the manufacturing process of such a secondary battery is performed using a conventional apparatus as shown in Figs.

도 1에서, 접착력을 지닌 바인더 용액이 호퍼(4)의 내부에 일정 수위를 유지하며 충만되고, 시트상으로 제조된 전극 기재(10)는 구동로울러(8)에 의해 테이그업되어서 호퍼(4) 내부의 바인더(16) 용액을 통과하는 데, 이 때 전극 기재(10)의 양면에는 바인더(16) 용액이 개재되며, 개재된 바인더(16) 용액은 호퍼(4)와 구동로울러(8)의 사이에 설치되는 닥터블레이드(12)로 인하여 전극 기재의 양면에 일정 두께로 긁혀지고, 이렇게 바인더(16)가 개재된 전극 기재는 고온의 로를 거쳐 건조됨으로써 바인더 상호간에 가교결합하여 전극 기재(10)에 견고하게 접착된다. 특히 바인더(16)는 통상적으로 알려진 러버(rubber)계, 실리콘(silicone)계, 불소계, 우레탄계를 사용하며, 바인더의 건조온도는 100~200도 사이를 유지한다. 또한 바인더의 두께를 너무 두껍게 하면 활물질과 기판 사이의 도전성이 떨어지므로 최대한 얇은 두께로 도포한다.In Fig. 1, a binder solution having an adhesive force is filled while maintaining a constant level inside the hopper 4, and the electrode substrate 10 manufactured in the form of a sheet is taken up by the driving roller 8 so that the hopper 4 Through the solution of the binder 16 inside, the binder 16 solution is interposed on both sides of the electrode substrate 10, and the interposed binder 16 solution of the hopper 4 and the driving roller 8 is separated. Due to the doctor blades 12 disposed therebetween, both sides of the electrode substrate are scratched to a certain thickness, and thus the electrode substrate having the binder 16 interposed therebetween is dried through a high temperature furnace to crosslink between the binder and the electrode substrate 10. ) Is firmly adhered to. In particular, the binder 16 is commonly used rubber (rubber), silicon (silicone), fluorine-based, urethane-based, the drying temperature of the binder is maintained between 100 ~ 200 degrees. In addition, if the thickness of the binder is too thick, the conductivity between the active material and the substrate is reduced, so that the coating is as thin as possible.

이와같이 1차로 바인더가 도포된 기판의 양면에 2차로 활물질 슬러리를 도포하게 되는 데, 도 2에서 2차 도포과정을 나타내고 있다.In this way, the active material slurry is secondarily applied to both surfaces of the substrate to which the binder is first applied, and a second coating process is illustrated in FIG. 2.

호퍼(4)의 내부에는 증점제, 도전제, 바인더가 혼합된 페이스트상의 활물질 슬러리(14)가 일정 수위로 채워지는 데, 여기서 바인더의 농도는 1차로 전극 기재에 도포된 바인더의 농도와 같거나 작게 유지한다.The inside of the hopper 4 is filled with a paste-like active material slurry 14 mixed with a thickener, a conductive agent, and a binder at a predetermined level, where the concentration of the binder is equal to or less than the concentration of the binder applied to the electrode substrate. Keep it.

시트상으로 제조된 전극 기재(10)는 호퍼(4)의 상부에 설치된 구동로울러(8)에 의해 테이크업되어서 호퍼(4) 내부의 활물질 슬러리(14)를 통과하는 데, 이 때 활물질 슬러리(14)는 이의 내부에 설치된 충전로울러(6)에 의해 가압되면서 전극 기재(10)의 양면에 일정두께로 도포된다. 도포된 활물질 슬러리(14)는 닥터블레이드(12)에 의해 규정치의 두께로 긁혀지고, 이후 고온의 로를 거쳐 건조된다.The electrode substrate 10 manufactured in the form of a sheet is taken up by a driving roller 8 installed on the top of the hopper 4 and passes through the active material slurry 14 inside the hopper 4. 14 is applied to both sides of the electrode substrate 10 by a predetermined thickness while being pressed by the filling roller 6 installed therein. The applied active material slurry 14 is scratched to a prescribed thickness by the doctor blade 12 and then dried over a high temperature furnace.

이와같이 전극 기재는 도 3에 도시한 바와 같이 1,2차 도포과정을 거치면서 양면에 일정 두께의 바인더(16) 층과 활물질(14) 층을 갖는다. 특히 1차로 전극 기재의 양면에 도포된 바인더의 농도가 2차로 도포되는 활물질의 내부에 함유된 바인더의 농도와 같거나 더 진하기 때문에 전극 기재와 바인더 사이의 접착력이 바인더와 활물질의 접착력보다 견고하고, 이에 따라 기판(10)의 완성 후 극판군을 권취할 때나 2차 전지의 충방전시 기판에서 활물질이 탈락되는 것을 방지할 수 있다.As described above, the electrode substrate has a binder 16 layer and an active material layer 14 having a predetermined thickness on both surfaces thereof through the first and second coating processes as shown in FIG. 3. In particular, since the concentration of the binder applied on both sides of the electrode substrate firstly is equal to or greater than the concentration of the binder contained in the active material applied secondly, the adhesive force between the electrode substrate and the binder is stronger than that of the binder and the active material. Accordingly, the active material can be prevented from falling off from the substrate when the electrode group is wound up after completion of the substrate 10 or when the secondary battery is charged and discharged.

이상에서 설명된 구성 및 제조방법을 통하여 알 수 있듯이, 본 발명에 의한 2차 전지의 전극 제조방법은 종래 기술의 문제점을 실질적으로 해소하고 있다.As can be seen through the configuration and manufacturing method described above, the electrode manufacturing method of the secondary battery according to the present invention substantially solves the problems of the prior art.

즉, 본 발명은 전극 기재의 양면에 1차로 바인더를 도포하고 2차로 활물질이 도포되기 때문에 알루미늄, 니켈, 동박인 기판이 매끄럽더라도 활물질의 접착력이 극대화된다.That is, in the present invention, since the binder is first applied to both surfaces of the electrode substrate and the active material is applied second, the adhesive strength of the active material is maximized even if the substrate made of aluminum, nickel, or copper foil is smooth.

따라서 극판군를 권취할 때나 2차 전지의 충방전시 기판에서 활물질이 탈락되는 것을 방지할 수 있다. 나아가 전지의 성능을 크게 향상시킬 수 있고 리튬 이온 2차 전지의 경우에는 안전사고에 대한 위험성을 감소시킬 수 있는 효과를 얻을 수 있다.Therefore, it is possible to prevent the active material from falling off from the substrate when the electrode plate group is wound or when the secondary battery is charged and discharged. Furthermore, the performance of the battery can be greatly improved, and in the case of a lithium ion secondary battery, an effect of reducing the risk of a safety accident can be obtained.

Claims (3)

캔에 전극 기재와 세퍼레이터가 함께 밀착된 극판군을 권취하여 삽입하고, 이 캔의 내부에 전해물질을 주입하며, 상기 극판군의 양극 기재와 연결되는 캡어셈블리와 상기 캔과 캡어셈블리가 절연되게 하는 절연가스킷을 구비한 후 밀봉하는 구조로 이루어진 2차 전지의 전극 제조방법에 있어서,Winding and inserting the electrode plate group in which the electrode substrate and the separator are in close contact with the can, and injecting an electrolytic material into the can, insulates the cap assembly connected to the positive electrode substrate of the electrode plate group and the can and the cap assembly In the electrode manufacturing method of the secondary battery consisting of a structure that is sealed after having an insulating gasket, 상기 극판군의 전극 기재 표면에 1차로 바인더를 개재하고, 상기 바인더의 상부에 2차로 바인더가 함유된 활물질 슬러리를 개재하는 것이 특징인 2차 전지의 양·음극 제조 방법.A method for producing a positive and negative electrode for a secondary battery, characterized in that a binder is first interposed on the surface of the electrode substrate of the electrode plate group, and an active material slurry containing a binder is secondly disposed on the binder. 제 1 항에 있어서, 상기 전극 기재에 1차로 개재된 바인더의 농도가 2차로 개재된 슬러리에 함유된 바인더의 농도와 같거나 많은 것이 특징인 2차 전지의 양·음극 제조 방법.The method of claim 1, wherein the concentration of the binder interposed primarily on the electrode substrate is equal to or greater than the concentration of the binder contained in the slurry interposed secondly. 제 1 항에 있어서, 상기 전극 기재에 1차로 개재된 바인더를 100 내지 200 도로 열처리하여 가교 결합시키는 것을 특징으로 하는 2차 전지의 양·음극 제조 방법.The method for manufacturing a positive and negative electrode of a secondary battery according to claim 1, wherein the binder primarily interposed in the electrode base material is subjected to heat treatment at 100 to 200 degrees to crosslink.
KR1019980016435A 1998-05-08 1998-05-08 Method for manufacturing electrode of secondary battery KR100274890B1 (en)

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