WO2019039815A2 - Électrode de batterie rechargeable, son procédé de fabrication, et ensemble électrode - Google Patents

Électrode de batterie rechargeable, son procédé de fabrication, et ensemble électrode Download PDF

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Publication number
WO2019039815A2
WO2019039815A2 PCT/KR2018/009533 KR2018009533W WO2019039815A2 WO 2019039815 A2 WO2019039815 A2 WO 2019039815A2 KR 2018009533 W KR2018009533 W KR 2018009533W WO 2019039815 A2 WO2019039815 A2 WO 2019039815A2
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WO
WIPO (PCT)
Prior art keywords
active material
material layer
current collector
electrode
inclined portion
Prior art date
Application number
PCT/KR2018/009533
Other languages
English (en)
Korean (ko)
Other versions
WO2019039815A3 (fr
Inventor
김남원
박필규
송한갑
윤덕중
김대현
정안수
Original Assignee
주식회사 엘지화학
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020180093108A external-priority patent/KR102265849B1/ko
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to JP2019549523A priority Critical patent/JP7047202B2/ja
Priority to EP18849036.1A priority patent/EP3595047A4/fr
Priority to CN201880024191.1A priority patent/CN110495019B/zh
Priority to US16/605,491 priority patent/US11539044B2/en
Publication of WO2019039815A2 publication Critical patent/WO2019039815A2/fr
Publication of WO2019039815A3 publication Critical patent/WO2019039815A3/fr

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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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • 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
    • 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
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to an electrode for a secondary battery, a method of manufacturing the electrode, and an electrode assembly, and more particularly, to an electrode for a secondary battery, a method of manufacturing the electrode, and an electrode assembly for improving the stability of the secondary battery.
  • the secondary battery is an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (HEV), and the like, which are proposed as solutions for air pollution of existing gasoline vehicles and diesel vehicles using fossil fuels (Plug-In HEV) and the like.
  • EV electric vehicle
  • HEV hybrid electric vehicle
  • HEV plug-in hybrid electric vehicle
  • Plug-In HEV fossil fuels
  • a middle- or large-sized battery module such as an automobile is used as a middle- or large-sized battery module in which a plurality of battery cells are electrically connected due to the necessity of a large-
  • the middle- or large-sized battery module is preferably manufactured in a small size and weight
  • a prismatic battery, a pouch-shaped battery, or the like which can be charged with a high degree of integration and has a small weight to capacity, is mainly used as a battery cell have.
  • a pouch-shaped battery using an aluminum laminate sheet or the like as an exterior member has recently attracted a lot of attention due to its advantages such as small weight, low manufacturing cost, and easy shape deformation.
  • the present invention provides an electrode for a secondary battery, a method of manufacturing the electrode, and an electrode assembly that can prevent deformation of the current collector by mitigating the pressure applied to the current collector, and prevent cracks from being generated in the production of the electrode.
  • An electrode for a secondary battery includes: a current collector extended in one direction; A first active material layer formed on one surface of the current collector, the first active material layer including a first inclined portion and a first projected portion; And a second active material layer formed on the other surface of the current collector, the second active material layer including a second inclined portion and a second protruding portion, wherein the second protruding portion is formed so as not to face the first inclined portion The position on the second active material layer is controlled.
  • the second protrusion may be spaced apart from the second inclined portion by a predetermined distance.
  • An unoccupied portion where the first active material layer is not provided may be formed on one surface of the current collector.
  • first inclined portion and the first projected portion are formed on one side of the first active material layer and the second inclined portion and the second projected portion are formed on one side of the second active material layer in the same direction as one side of the first active material layer .
  • the first active material layer and the second active material layer may be formed of an electrode active material for a cathode or an electrode active material for a cathode.
  • a method of manufacturing an electrode for a secondary battery including: providing a current collector having a first active material layer including a first inclined portion and a first projection on one surface thereof; Transferring the current collector in one direction; And forming a second active material layer including a second inclined portion and a second protruding portion by applying a second active material to the other surface of the current collector.
  • the position of the second projecting portion on the second active material layer is controlled so as to be formed at a position not facing the first inclined portion with respect to the current collector.
  • the second projecting portion may be spaced apart from the second inclined portion by a predetermined distance.
  • An unoccupied portion where the first active material layer is not provided may be formed on one surface of the current collector.
  • the position of the second protrusion can be controlled by adjusting the application pressure of the second active material layer.
  • the position of the second projecting portion can be controlled by adjusting the conveying speed of the current collector.
  • an electrode assembly includes an anode, a cathode, and a separator interposed between the anode and the cathode, wherein at least one of the anode and the cathode includes any one of the above- .
  • the position of the protrusion formed on the second active material layer is controlled to a position not facing the inclined portion of the first active material layer, thus, it is possible to prevent the deformation of the current collector by reducing the pressure applied to the current collector, and to prevent the generation of cracks during the production of the electrode.
  • the shape of the first active material layer and the second active material layer formed on both surfaces of the current collector is controlled so that the thickness of the electrode does not increase abruptly to obtain an electrode for a secondary battery of uniform thickness And can improve product stability, economy, and yield.
  • Fig. 1 is a view showing a general secondary battery electrode.
  • FIG. 2 is a view showing a state where a pressure is applied to a current collector in a general secondary cell electrode.
  • FIG 3 is a view showing a position where cracks are generated in a current collector in a general secondary cell electrode.
  • FIG. 4 is a graph showing the plastic strain of a current collector in a general secondary cell electrode.
  • FIG. 5 is a view showing an electrode for a secondary battery according to an embodiment of the present invention.
  • FIG. 6 is a view showing an electrode for a secondary battery according to another embodiment of the present invention.
  • FIG. 7 is a view showing a state where a pressure is applied to a current collector in an electrode for a secondary battery according to an embodiment of the present invention.
  • FIG. 8 is a graph showing the plastic strain of a current collector in an electrode for a secondary battery according to an embodiment of the present invention.
  • a middle- or large-sized battery module such as an automobile is used as a middle- or large-sized battery module in which a plurality of battery cells are electrically connected due to the necessity of a large-
  • the electrodes such as the positive electrode and the negative electrode included in the electrode assembly of the secondary battery include a step of forming the electrode active material layer on the current collector.
  • the step of forming the electrode active material layer includes the steps of applying the active material slurry in which the electrode active material particles are injected into the binder solution to the current collector and drying the active material slurry applied to the current collector to remove the solution and moisture present in the active material slurry Thereby forming an electrode active material layer on the current collector.
  • the active material slurry has a high viscosity coefficient due to its physical characteristics. Therefore, when the electrode active material layer is formed on the current collector, an inclined portion which is defined as a drag region and is sharply formed at the tip portion of the application region is formed, and is defined as a balcony region and is convexly formed at a position spaced apart from the inclined portion A protrusion is formed.
  • a general secondary cell electrode includes a current collector 100 extending in one direction, and a first inclined portion 210 and a first protruding portion 220, (200) is formed.
  • the second active material layer 300 including the second inclined portion 310 and the second protruding portion 320 is formed on the other surface of the current collector 100.
  • the inclined portion refers to a drag region that is sharply generated at the tip portion of the application region as described above, and the projected portion refers to a balcony region that is convexly generated at a predetermined interval from the inclined portion.
  • the second protruding portion 320 of the second active material layer 300 When the second protruding portion 320 of the second active material layer 300 is positioned in the region of the first active material layer 200 facing the first inclined portion 210 of the first active material layer 300, The thickness of the electrode in the region where the second protrusion 320 is located is rapidly increased, and the rolling rate is locally increased in the region, so that deformation of the current collector 100 occurs. 2, the current collector 100 maintains a thickness of about 16.7 ⁇ m between the first active material layer 200 and the second active material layer 300. However, the first active material layer 200, The current collector 100 is deformed to a thickness of about 12.8 ⁇ ⁇ in a region where the second projecting portion 320 of the second active material layer 300 is opposed to the first inclined portion 210 of the current collector 100 .
  • the current collector 100 at a length of 15 to 20 mm from the end of the collector increases the peak value of the plastic strain PEEQ of the current collector 100 by increasing the local rolling rate Is increased to a value of about 0.06 or more so that deformation occurs in the current collector 100 and cracks, that is, disconnection, occur at the time of winding.
  • the first inclined portion 210 and the first projected portion 220 are formed on one side of the first active material layer 200 and the second inclined portion 310 and the second projected portion 320 are formed on the first active material layer 200 200 formed on one side of the second active material layer 300, which are located in the same direction as the first active material layer 300. 5 and 6, the first inclined portion 210 and the first projected portion 220 may be formed on the left side of the first active material layer 200 and the second inclined portion 210 310 and the second protrusion 320 may be formed on the left side of the second active material layer 300 in the same direction.
  • the non-coated portion N may be formed to have a length of 10 to 20 mm along the extending direction of the current collector 100.
  • the first inclined portion 210 may be formed at the end portion of the first active material layer 200,
  • the second inclined portion 310 refers to a drag region formed in the shape of a sharp point at the end portion of the second active material layer 300.
  • the process of preparing the current collector 100 in which the first active material layer 200 including the first inclined portion 210 and the first protruding portion 220 is formed on one side is performed by the coating device described above,
  • the active material slurry is coated on one surface of the entire body 100 and dried to form the first active material layer 200.
  • the first active material layer 200 may be formed at a position spaced apart from the ends of the current collector 100 by a length of 10 to 20 mm to form a plain weave N on one surface of the current collector 100,
  • a first inclined portion 210 is formed at an end of the first active material layer 200 and a first protrusion 220 is formed at a position spaced apart from the first inclined portion 210 by a predetermined distance.
  • the positional control of the second protrusion 320 may be performed by adjusting the application pressure of the second active material layer 300. That is, in forming the second active material layer 300 on the other surface of the current collector 100, the position of the second protrusion 320 can be controlled by changing the application pressure of the coating die for supplying the second active material slurry .

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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

La présente invention concerne une électrode de batterie rechargeable, son procédé de fabrication, et un ensemble électrode et, plus spécifiquement, une électrode de batterie rechargeable pour améliorer la stabilité d'une batterie rechargeable, son procédé de fabrication, et un ensemble électrode. L'électrode de batterie rechargeable selon un mode de réalisation de l'invention comprend : un collecteur de courant formé de sorte à s'étendre dans une première direction ; une première couche de matériau actif formée sur une première surface du collecteur de courant et comprenant une première partie d'inclinaison et une première partie de saillie ; et une seconde couche de matériau actif formée sur l'autre surface du collecteur de courant et comprenant une seconde partie d'inclinaison et une seconde partie de saillie, la position de la seconde partie de saillie sur la seconde couche de matériau actif étant contrôlée de telle sorte que la seconde partie de saillie est formée dans une position qui n'est pas opposée à la première partie d'inclinaison avec le collecteur de courant entre celles-ci.
PCT/KR2018/009533 2017-08-21 2018-08-20 Électrode de batterie rechargeable, son procédé de fabrication, et ensemble électrode WO2019039815A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2019549523A JP7047202B2 (ja) 2017-08-21 2018-08-20 二次電池用の電極、この製造方法及び電極組立体
EP18849036.1A EP3595047A4 (fr) 2017-08-21 2018-08-20 Électrode de batterie rechargeable, son procédé de fabrication, et ensemble électrode
CN201880024191.1A CN110495019B (zh) 2017-08-21 2018-08-20 二次电池电极、其制造方法和电极组件
US16/605,491 US11539044B2 (en) 2017-08-21 2018-08-20 Secondary battery electrode, manufacturing method for the same, and electrode assembly

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20170105613 2017-08-21
KR10-2017-0105613 2017-08-21
KR10-2018-0093108 2018-08-09
KR1020180093108A KR102265849B1 (ko) 2017-08-21 2018-08-09 이차 전지용 전극, 이의 제조 방법 및 전극 조립체

Publications (2)

Publication Number Publication Date
WO2019039815A2 true WO2019039815A2 (fr) 2019-02-28
WO2019039815A3 WO2019039815A3 (fr) 2019-04-25

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150054702A (ko) 2013-11-12 2015-05-20 주식회사 엘지화학 젤리-롤형 전극 조립체 및 이를 구비한 이차전지

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011138675A (ja) * 2009-12-28 2011-07-14 Panasonic Corp 非水系二次電池用電極群およびこれを用いた非水系二次電池
JP2011146219A (ja) * 2010-01-14 2011-07-28 Panasonic Corp 非水系二次電池用電極群およびこれを用いた非水系二次電池
WO2014034708A1 (fr) * 2012-08-29 2014-03-06 シャープ株式会社 Plaque électrode et batterie secondaire
KR101675950B1 (ko) * 2014-05-08 2016-11-14 주식회사 엘지화학 교번 배열된 무지부와 코팅부를 포함하고 있는 플렉서블 전극조립체 및 그것을 포함하는 전지셀
KR102484265B1 (ko) * 2015-12-22 2023-01-02 삼성에스디아이 주식회사 전극 조립체 및 이를 이용한 이차 전지

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150054702A (ko) 2013-11-12 2015-05-20 주식회사 엘지화학 젤리-롤형 전극 조립체 및 이를 구비한 이차전지

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3595047A4

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