WO2000060690A1 - Method of bonding a separator and an electrode, more particularly a cathode or an anode, as well as a battery - Google Patents

Method of bonding a separator and an electrode, more particularly a cathode or an anode, as well as a battery Download PDF

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Publication number
WO2000060690A1
WO2000060690A1 PCT/EP2000/002086 EP0002086W WO0060690A1 WO 2000060690 A1 WO2000060690 A1 WO 2000060690A1 EP 0002086 W EP0002086 W EP 0002086W WO 0060690 A1 WO0060690 A1 WO 0060690A1
Authority
WO
WIPO (PCT)
Prior art keywords
separator
anode
cathode
electrode
adhesive
Prior art date
Application number
PCT/EP2000/002086
Other languages
French (fr)
Inventor
Rifat A. M. Hikmet
Original Assignee
Koninklijke Philips Electronics N.V.
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
Application filed by Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Publication of WO2000060690A1 publication Critical patent/WO2000060690A1/en

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Classifications

    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • 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
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
    • H01M50/461—Separators, membranes or diaphragms characterised by their combination with electrodes with adhesive layers between electrodes and separators
    • 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

Definitions

  • Method of bonding a separator and an electrode more particularly a cathode or an anode, as well as a battery.
  • the present invention relates to a method of bonding a separator and an electrode, more particularly a cathode or an anode.
  • the present invention further relates to a battery composed of, in succession, one or more layers of a current collector, an anode, a separator, a cathode, a current collector and an electrolyte.
  • a method of bonding a separator and an electrode is known from United
  • the separator membrane element known from this United State patent specification is generally prepared from a composition of vinylidene fluoride, hexafluoropropene copolymer and a compatible organic softening agent. Such a copolymer composition is also used to manufacture the electrode membrane elements because it enables the compatibility of the laminate interface to be guaranteed.
  • the final battery is subsequently obtained by laminating the individual elements while subjecting them to heat and pressure. Subsequently, the solvent is removed and the construction is dried. Such a dry construction can be subsequently immersed in an electrolyte, and the battery is activated.
  • the present invention to provide a method which enables different types of separators to be used in combination with different anode and cathode materials.
  • the method as mentioned in the opening paragraph is characterized in accordance with the present invention in that the separator is made from another matrix material than the electrode, and the adhesion between the separator and the electrode is brought about by means of an adhesive which cannot be dissolved in the electrolyte.
  • cathode as used herein is to be taken to mean a positive electrode
  • anode is to be taken to mean a negative electrode.
  • the adhesive use is preferably made of a thermal or polymerizable adhesive, said adhesive being provided, in particular, in a dotted manner.
  • anode and/or cathode are subjected to an oxidation treatment, in particular a plasma oxidation, solution oxidation or radical oxidation. It is further preferred to subject the surface of the separator, anode and/or cathode chemically functionalized as described hereinabove to a modification treatment using reactive groups. Suitable reactive groups include acrylate groups, vinylether groups, epoxide groups and thiolene groups.
  • the present invention further relates to a battery which is built up of, in succession, a current collector, an anode, a separator, a cathode, a current collector and an electrolyte, which battery is characterized in accordance with the invention in that the anode, separator and cathode are interconnected in accordance with the present method.
  • a mixture of 5.3 g meso-carbon micro-grains, 5 g decalin and 0.1 g UHMWPE having a molecular weight above 1 million is prepared.
  • the mixture is heated to 160 °C and a film is cast. After removing the excess solvent, the film is further densified by rolling.
  • the cathode is manufactured in the same manner as the anode, with the exception that first a mixture is prepared comprising 5 g LiCoO , 5 g decalin, 0.1 g UHMWPE and 0.3 g soot. The polymer is subsequently heated and treated in the same manner as the negative electrode. After removal of the solvent, dry plates are obtained. Subsequently, current collectors are provided in a customary manner on both the cathode and the anode. Adhesion between separator and electrode
  • the anode and cathode materials which are obtained as described hereinabove, are provided in accordance with a special dotted pattern with a thermal adhesive on the basis of paraffin.
  • a separator made from porous polypropene is subsequently provided between the cathode and anode materials and bonded thereto by exposure to heat and pressure.
  • the dry battery construction is subsequently immersed in an electrolyte consisting of 1 mol LiPF 6 in EC:DEC is 1 :1.
  • the battery can be subjected to a cycle.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

The invention relates to a method of bonding a separator and an electrode containing different matrix materials by means of an adhesive insoluble in the electrolyte. Preferably a thermal or polymerizable adhesive is used and the surface of separator or electrode is subjected to an oxidation treatment, such as plasma oxidation or solution oxidation.

Description

Method of bonding a separator and an electrode, more particularly a cathode or an anode, as well as a battery.
The present invention relates to a method of bonding a separator and an electrode, more particularly a cathode or an anode. The present invention further relates to a battery composed of, in succession, one or more layers of a current collector, an anode, a separator, a cathode, a current collector and an electrolyte. Such a method of bonding a separator and an electrode is known from United
States patent specification 5,470,357. The separator membrane element known from this United State patent specification is generally prepared from a composition of vinylidene fluoride, hexafluoropropene copolymer and a compatible organic softening agent. Such a copolymer composition is also used to manufacture the electrode membrane elements because it enables the compatibility of the laminate interface to be guaranteed. The final battery is subsequently obtained by laminating the individual elements while subjecting them to heat and pressure. Subsequently, the solvent is removed and the construction is dried. Such a dry construction can be subsequently immersed in an electrolyte, and the battery is activated.
The drawback of such a lamination method is that there is a limited choice of the separator type which can be used in the battery. Thus, as is well known, special separators have been developed which have an internal fuse function. Above a certain temperature, a separator having such a fuse function is no longer porous and hence no longer ion-conducting. Consequently, the use of such a separator having a fuse function is desirable because it offers additional protection to the lithium battery. If the battery is charged to excess or an internal short-circuit occurs, the internal temperature increases and the battery automatically stops functioning.
Therefore, it is an object of the present invention to provide a method which enables different types of separators to be used in combination with different anode and cathode materials. The method as mentioned in the opening paragraph is characterized in accordance with the present invention in that the separator is made from another matrix material than the electrode, and the adhesion between the separator and the electrode is brought about by means of an adhesive which cannot be dissolved in the electrolyte. It should be clear that the term cathode as used herein is to be taken to mean a positive electrode, and the term anode is to be taken to mean a negative electrode.
For the adhesive use is preferably made of a thermal or polymerizable adhesive, said adhesive being provided, in particular, in a dotted manner. By providing the adhesive in accordance with a particular pattern, it is precluded that the porous character of the electrode and/or separator is lost.
To improve the adhesion between the electrode and the separator, preferably the surfaces of the separator, anode and/or cathode are subjected to an oxidation treatment, in particular a plasma oxidation, solution oxidation or radical oxidation. It is further preferred to subject the surface of the separator, anode and/or cathode chemically functionalized as described hereinabove to a modification treatment using reactive groups. Suitable reactive groups include acrylate groups, vinylether groups, epoxide groups and thiolene groups.
The present invention further relates to a battery which is built up of, in succession, a current collector, an anode, a separator, a cathode, a current collector and an electrolyte, which battery is characterized in accordance with the invention in that the anode, separator and cathode are interconnected in accordance with the present method. These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter; it is to be noted that the present invention is in no way limited to the materials used in particular. Manufacture of an anode
A mixture of 5.3 g meso-carbon micro-grains, 5 g decalin and 0.1 g UHMWPE having a molecular weight above 1 million is prepared. The mixture is heated to 160 °C and a film is cast. After removing the excess solvent, the film is further densified by rolling. Manufacture of a cathode
The cathode is manufactured in the same manner as the anode, with the exception that first a mixture is prepared comprising 5 g LiCoO , 5 g decalin, 0.1 g UHMWPE and 0.3 g soot. The polymer is subsequently heated and treated in the same manner as the negative electrode. After removal of the solvent, dry plates are obtained. Subsequently, current collectors are provided in a customary manner on both the cathode and the anode. Adhesion between separator and electrode
The anode and cathode materials, which are obtained as described hereinabove, are provided in accordance with a special dotted pattern with a thermal adhesive on the basis of paraffin. A separator made from porous polypropene is subsequently provided between the cathode and anode materials and bonded thereto by exposure to heat and pressure. The dry battery construction is subsequently immersed in an electrolyte consisting of 1 mol LiPF6 in EC:DEC is 1 :1. The battery can be subjected to a cycle.

Claims

CLAIMS:
1. A method of bonding a separator and an electrode, more particularly a cathode or an anode, characterized in that the separator is made from another matrix material than the electrode, and the adhesion between the separator and the electrode is brought about by means of an adhesive which cannot be dissolved in electrolyte.
2. A method as claimed in claim 1 , characterized in that a thermal adhesive is used.
3. A method as claimed in claim 1 , characterized in that a polymerizable adhesive is used.
4. A method as claimed in claims 1-3, characterized in that the adhesive is provided in a dotted manner.
5. A method as claimed in claim 1 , characterized in that the surface of the separator, anode and/or cathode is subjected to an oxidation treatment to improve the adhesion.
6. A method as claimed in claim 5, characterized in that the oxidation treatment comprises plasma oxidation, solution oxidation or radical oxidation.
7. A method as claimed in claims 5-6, characterized in that the surface of the separator, anode and/or cathode thus chemically functionalized is modified using reactive groups.
8. A method as claimed in claim 7, characterized in that for the reactive groups use is made of acrylate groups, vinylether groups, epoxide groups and thiolene groups. A battery built up of, in succession, one or more layers of a current collector, an anode, a separator, a cathode, a current collector and an electrolyte, characterized in that the anode, separator and cathode are interconnected in accordance with a method as described in claims 1-8.
PCT/EP2000/002086 1999-03-31 2000-03-09 Method of bonding a separator and an electrode, more particularly a cathode or an anode, as well as a battery WO2000060690A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP99201021 1999-03-31
EP99201021.5 1999-03-31

Publications (1)

Publication Number Publication Date
WO2000060690A1 true WO2000060690A1 (en) 2000-10-12

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Country Status (1)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001065625A1 (en) * 2000-03-03 2001-09-07 Koninklijke Philips Electronics N.V. Method of manufacturing a thin lithium battery
EP2248209A2 (en) * 2008-01-30 2010-11-10 LG Chem, Ltd. Separator for progressing united force to electrode and electrochemical containing the same
KR20180018177A (en) * 2016-08-12 2018-02-21 주식회사 엘지화학 Electrode assembly and Method for preparing the same
KR20180032763A (en) * 2016-09-23 2018-04-02 주식회사 엘지화학 Electrode Assembly Applied with Partially Binding between Electrode and Separator
EP3471187A4 (en) * 2016-08-12 2019-07-31 LG Chem, Ltd. Electrode assembly in which electrode and separation film are partially bonded
CN112086677A (en) * 2019-06-13 2020-12-15 万向一二三股份公司 Integrated lithium ion battery and preparation method thereof
CN113270690A (en) * 2016-02-16 2021-08-17 株式会社Lg化学 Electrode assembly and method of manufacturing the same

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02253569A (en) * 1989-03-27 1990-10-12 Matsushita Electric Ind Co Ltd Manufacture of solid state secondary battery
US5091272A (en) * 1990-05-29 1992-02-25 Duracell Inc. Separator for electrochemical cells
US5340672A (en) * 1992-07-06 1994-08-23 Fuji Photo Film Co., Ltd. Secondary battery
US5691005A (en) * 1993-10-07 1997-11-25 Matsushita Electric Industrial Co., Ltd. Manufacturing method of a separator for a lithium secondary battery and an organic electrolyte lithium secondary battery using the same separator
WO1998004015A1 (en) * 1996-07-22 1998-01-29 Motorola Inc. Electrochemical cell and method of making same
EP0849819A2 (en) * 1996-12-17 1998-06-24 Mitsubishi Denki Kabushiki Kaisha Lithium ion secondary battery and method of fabricating thereof
EP0862236A2 (en) * 1997-02-28 1998-09-02 Mitsubishi Denki Kabushiki Kaisha Adhesive for battery, battery using the same and method of fabricating the same
EP0866511A2 (en) * 1997-01-28 1998-09-23 Mitsubishi Denki Kabushiki Kaisha Litium ion secondary battery and method of fabricating the same
EP0892454A1 (en) * 1997-07-17 1999-01-20 Alcatel Polymer separator, process of preparation and secondary battery containing said separator
EP0982790A1 (en) * 1998-03-17 2000-03-01 Mitsubishi Denki Kabushiki Kaisha Lithium ion battery and method for forming the same

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02253569A (en) * 1989-03-27 1990-10-12 Matsushita Electric Ind Co Ltd Manufacture of solid state secondary battery
US5091272A (en) * 1990-05-29 1992-02-25 Duracell Inc. Separator for electrochemical cells
US5340672A (en) * 1992-07-06 1994-08-23 Fuji Photo Film Co., Ltd. Secondary battery
US5691005A (en) * 1993-10-07 1997-11-25 Matsushita Electric Industrial Co., Ltd. Manufacturing method of a separator for a lithium secondary battery and an organic electrolyte lithium secondary battery using the same separator
WO1998004015A1 (en) * 1996-07-22 1998-01-29 Motorola Inc. Electrochemical cell and method of making same
EP0849819A2 (en) * 1996-12-17 1998-06-24 Mitsubishi Denki Kabushiki Kaisha Lithium ion secondary battery and method of fabricating thereof
EP0866511A2 (en) * 1997-01-28 1998-09-23 Mitsubishi Denki Kabushiki Kaisha Litium ion secondary battery and method of fabricating the same
EP0862236A2 (en) * 1997-02-28 1998-09-02 Mitsubishi Denki Kabushiki Kaisha Adhesive for battery, battery using the same and method of fabricating the same
EP0892454A1 (en) * 1997-07-17 1999-01-20 Alcatel Polymer separator, process of preparation and secondary battery containing said separator
EP0982790A1 (en) * 1998-03-17 2000-03-01 Mitsubishi Denki Kabushiki Kaisha Lithium ion battery and method for forming the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 580 (E - 1017) 25 December 1990 (1990-12-25) *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001065625A1 (en) * 2000-03-03 2001-09-07 Koninklijke Philips Electronics N.V. Method of manufacturing a thin lithium battery
US6673129B2 (en) * 2000-03-03 2004-01-06 Koninklijke Philips Electronics N.V. Method of manufacturing a lithium battery
EP2248209A2 (en) * 2008-01-30 2010-11-10 LG Chem, Ltd. Separator for progressing united force to electrode and electrochemical containing the same
EP2248209A4 (en) * 2008-01-30 2013-01-23 Lg Chemical Ltd Separator for progressing united force to electrode and electrochemical containing the same
EP2927993A1 (en) * 2008-01-30 2015-10-07 Lg Chem, Ltd. Separator for an electrochemical device
CN113270690B (en) * 2016-02-16 2022-11-25 株式会社Lg新能源 Electrode assembly and method of manufacturing the same
CN113270690A (en) * 2016-02-16 2021-08-17 株式会社Lg化学 Electrode assembly and method of manufacturing the same
KR102169371B1 (en) 2016-08-12 2020-10-23 주식회사 엘지화학 Electrode assembly and Method for preparing the same
EP3471187A4 (en) * 2016-08-12 2019-07-31 LG Chem, Ltd. Electrode assembly in which electrode and separation film are partially bonded
US10826039B2 (en) 2016-08-12 2020-11-03 Lg Chem, Ltd. Electrode assembly including electrode and separator partially bonded to each other
KR20180018177A (en) * 2016-08-12 2018-02-21 주식회사 엘지화학 Electrode assembly and Method for preparing the same
KR102135150B1 (en) 2016-09-23 2020-07-17 주식회사 엘지화학 Electrode Assembly Applied with Partially Binding between Electrode and Separator
KR20180032763A (en) * 2016-09-23 2018-04-02 주식회사 엘지화학 Electrode Assembly Applied with Partially Binding between Electrode and Separator
CN112086677A (en) * 2019-06-13 2020-12-15 万向一二三股份公司 Integrated lithium ion battery and preparation method thereof
CN112086677B (en) * 2019-06-13 2022-04-12 万向一二三股份公司 Integrated lithium ion battery and preparation method thereof

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