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WO2000060685A1 - Procede d'application d'un collecteur de courant electriquement conducteur sur une electrode autoportante et ensemble d'electrode et de collecteur de courant - Google Patents

Procede d'application d'un collecteur de courant electriquement conducteur sur une electrode autoportante et ensemble d'electrode et de collecteur de courant Download PDF

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Publication number
WO2000060685A1
WO2000060685A1 PCT/EP2000/002076 EP0002076W WO0060685A1 WO 2000060685 A1 WO2000060685 A1 WO 2000060685A1 EP 0002076 W EP0002076 W EP 0002076W WO 0060685 A1 WO0060685 A1 WO 0060685A1
Authority
WO
WIPO (PCT)
Prior art keywords
current collector
electrode
electrically conducting
assembly
cathode
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2000/002076
Other languages
English (en)
Inventor
Rifat A. M. Hikmet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 NV filed Critical Koninklijke Philips Electronics NV
Priority to JP2000610080A priority Critical patent/JP2002541634A/ja
Priority to EP00918781A priority patent/EP1088358A1/fr
Publication of WO2000060685A1 publication Critical patent/WO2000060685A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H01M4/64—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
    • H01M10/05—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
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/661—Metal or alloys, e.g. alloy coatings
    • 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
    • H01M4/70—Carriers or collectors characterised by shape or form
    • 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

  • the invention relates to a method of applying an electrically conducting current collector on a self-supporting electrode. Furthermore, the invention relates to an assembly of an electrode and an electrically conducting current collector obtained by such a method and to a battery built up from, in that order, one or several layers of a current collector, an anode, a separator, a cathode, a current collector, and an electrolyte.
  • Such a method of applying an electrically conducting current collector on a self-supporting electrode is known per se from US patent 5,470,357.
  • a positive electrode film or membrane is separately manufactured as a coated layer of a dispersion of an intercalation electrode assembly, for example an LiMn 2 O 4 powder in a copolymer matrix solution, which is subsequently dried so as to form the membrane.
  • a positive current collector layer of aluminum foil is pretreated with a polymer- type material which is compatible with the matrix copolymer for the purpose of improving the adhesion to the positive electrode which is subsequently laid on the collector.
  • An electrolyte/separator membrane which is formed as a dried coating layer from a composition comprising a solution of NdF: HFP copolymer and a plasticizer is subsequently laid on the positive electrode film.
  • a negative electrode membrane which is formed as a dried coating layer of a powdery carbon dispersion in a copolymer matrix solution, is laid on the separator membrane layer in a corresponding manner, and a negative copper collector foil pretreated in a manner corresponding to that used for the positive collector is laid on the negative electrode layer, thus completing the cell construction.
  • This construction is subsequently heated under pressure for achieving the bond between the plasticized copolymer matrix components and the collector foils, so that a lamination of the cell elements into a coherent flexible battery cell structure is achieved.
  • a disadvantage of such self-supporting electrodes is that the applied current collector does not have a sufficiently good contact with the subjacent electrode, in particular cathode or anode.
  • a good contact must be maintained between the particles of the electrode and the current collectors throughout battery life.
  • the battery is enclosed in canisters in which the pressure can be maintained throughout battery life.
  • the contact between the current collector and the electrode is of a physical nature only in such an embodiment and is thus defined by the contact surface area at the boundary between the electrode and the current collector.
  • Another object of the present invention is to provide a method of applying an electrically conducting current collector on a self-supporting electrode in which any irregularities in the surface of the electrode do not substantially lead to a decrease in the contact surface area between the current collector provided and the self-supporting electrode.
  • the method as mentioned in the opening paragraph of the present document is characterized in that the electrically conducting layer forming the current collector is provided such that the electrically conducting layer follows the surface of the electrode on account of the fact that said layer is formed on said surface in situ.
  • Electrically conducting current collectors may thus be provided on anode and cathode materials by various techniques, such as physical or chemical vapor deposition, sputtering, or electroplating, the physical vapor deposition being preferred on account of the good surface contact between the electrode and the current collector.
  • cathode is used here to indicate a positive electrode and the term “anode” to indicate a negative electrode.
  • the electrically conducting layer is provided in dots on the self-supporting electrode.
  • the expression "in dots” is understood to mean here that not the entire surface area of the electrode is provided with the electrically conducting layer.
  • an electrically conducting layer on the positive self-supporting electrode and an electrically conducting layer on the negative self-supporting electrode. If an electrically conducting layer, preferably of aluminum, is applied on the cathode, an assembly of a positive current collector and cathode will be obtained; if an electrically conducting layer, preferably made of copper, is provided on the anode, an assembly of a negative current collector and anode will be obtained.
  • an electrically conducting layer preferably of aluminum
  • the invention further relates to a battery built up from, in that order, a current collector, an anode, a separator, a cathode, a current collector, and an electrolyte, which battery according to the present invention is characterized in that at least one of the component parts: current collector/anode and current collector/cathode is an assembly according to the invention.
  • a mixture of 5.3 g meso-carbon micrograins, 5 g decaline, and 0.05 g UHMWPE with a molecular weight of more than one million was prepared.
  • the mixture was heated to 160 °C and a film was cast. The excess quantity of solvent was removed and the film was densified by rolling.
  • the cathode was manufactured in the same way as the anode, except that first a mixture was prepared of 5 g LiCoO , 5 g decaline, 0.05 g UHMWPE, and 0.3 g soot. The mixture was then heated and treated in the same manner as for the negative electrode. Dry plates were obtained after removal of the solvent.
  • a cathode material with a thickness of 100 ⁇ m manufactured by the method described above was used, from which material a disc with a diameter of 1.5 cm was cut.
  • a comparison sample was manufactured, using two 10 ⁇ m thick perforated aluminum films with the same surface area as the cathode material which were provided between three cathode discs in an alternating arrangement and laminated under the influence of heat and pressure in the presence of a small quantity of solvent.
  • the sample according to the present invention was prepared by direct evaporation of aluminum electrodes onto the surfaces of the cathode materials. The resistance values of the samples as a function of time were measured after the samples had been moistened with acetone.
  • the electrodes obtained by physical vapor deposition as manufactured in example 1 were used with a porous separator of polythene being interposed between the anode and cathode materials.
  • the battery construction was subsequently provided with an electrolyte composition comprising 1 mole LiPF 6 in EC:DEC of 1 :1. The battery gave no problems when subjected to a charge/discharge cycle.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

L'invention concerne un procédé de dépôt physique ou chimique en phase vapeur, telle que l'évaporation, d'un collecteur de courant métallique sur une électrode autoportante. Ce type d'électrode peut être utilisée dans les batteries aux ions de lithium rechargeables. L'invention se caractérise en que la couche électriquement conductrice formant le collecteur de courant est formée de telle sorte que cette couche suit la surface de l'électrode puisque cette couche est formée sur ladite surface in situ. Des collecteurs de courant électriquement conducteurs peuvent ainsi être constitués par des matériaux d'anode et de cathode par diverses techniques, comme le dépôt physique ou chimique en phase vapeur, la pulvérisation cathodique ou le dépôt électrolytique. Le procédé de dépôt physique en phase vapeur est préféré en raison du bon contact de surface entre l'électrode et le collecteur de courant. L'invention traite par ailleurs d'une batterie constituée, dans cet ordre, d'un collecteur de courant, d'une anode, d'un séparateur, d'une cathode, d'un collecteur de courant et d'un électrolyte, laquelle batterie selon la présente invention se caractérise en ce que, parmi les composants, au moins le collecteur de courant/l'anode et le collecteur de courant/la cathode forme un ensemble selon la présente invention.
PCT/EP2000/002076 1999-03-31 2000-03-09 Procede d'application d'un collecteur de courant electriquement conducteur sur une electrode autoportante et ensemble d'electrode et de collecteur de courant Ceased WO2000060685A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2000610080A JP2002541634A (ja) 1999-03-31 2000-03-09 導電性集電体を自己支持電極上に施与する方法、及び電極と集電体との組立体
EP00918781A EP1088358A1 (fr) 1999-03-31 2000-03-09 Procede d'application d'un collecteur de courant electriquement conducteur sur une electrode autoportante et ensemble d'electrode et de collecteur de courant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP99201022.3 1999-03-31
EP99201022 1999-03-31

Publications (1)

Publication Number Publication Date
WO2000060685A1 true WO2000060685A1 (fr) 2000-10-12

Family

ID=8240054

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/002076 Ceased WO2000060685A1 (fr) 1999-03-31 2000-03-09 Procede d'application d'un collecteur de courant electriquement conducteur sur une electrode autoportante et ensemble d'electrode et de collecteur de courant

Country Status (3)

Country Link
EP (1) EP1088358A1 (fr)
JP (1) JP2002541634A (fr)
WO (1) WO2000060685A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111244434A (zh) * 2020-01-21 2020-06-05 黑龙江科技大学 一种cvd结合mao制备锂离子电池负极材料的方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2503936A1 (fr) * 1981-04-13 1982-10-15 Wonder Procede de preparation de collecteurs de courant pour dispositifs electrochimiques, par depot sur des electrodes pour de tels dispositifs, et ensembles unitaires electrodes-collecteurs obtenus par ce procede
US4440835A (en) * 1981-04-13 1984-04-03 Societe Les Piles Wonder Thin non-flat gas electrode, current collector and process of manufacture
US4581307A (en) * 1984-03-28 1986-04-08 Saft, S.A. High specific energy electrochemical cell with low initial impedance
JPH02158054A (ja) * 1988-12-09 1990-06-18 Komatsu Ltd プラスチック電池
EP0397523A2 (fr) * 1989-05-11 1990-11-14 Mhb Joint Venture Pile électrochimique à électrolyte solide et son collecteur de courant
US5415948A (en) * 1991-09-17 1995-05-16 Hydro-Quebec Current collectors for safe electrochemical generators, process of preparation and generators obtained thereby
US5554460A (en) * 1994-07-05 1996-09-10 Motorola, Inc. Multi-layered coated membrane electrodes for electrochemical cells and cells using same

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2503936A1 (fr) * 1981-04-13 1982-10-15 Wonder Procede de preparation de collecteurs de courant pour dispositifs electrochimiques, par depot sur des electrodes pour de tels dispositifs, et ensembles unitaires electrodes-collecteurs obtenus par ce procede
US4440835A (en) * 1981-04-13 1984-04-03 Societe Les Piles Wonder Thin non-flat gas electrode, current collector and process of manufacture
US4581307A (en) * 1984-03-28 1986-04-08 Saft, S.A. High specific energy electrochemical cell with low initial impedance
JPH02158054A (ja) * 1988-12-09 1990-06-18 Komatsu Ltd プラスチック電池
EP0397523A2 (fr) * 1989-05-11 1990-11-14 Mhb Joint Venture Pile électrochimique à électrolyte solide et son collecteur de courant
US5415948A (en) * 1991-09-17 1995-05-16 Hydro-Quebec Current collectors for safe electrochemical generators, process of preparation and generators obtained thereby
US5554460A (en) * 1994-07-05 1996-09-10 Motorola, Inc. Multi-layered coated membrane electrodes for electrochemical cells and cells using same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 413 (E - 0974) 6 September 1990 (1990-09-06) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111244434A (zh) * 2020-01-21 2020-06-05 黑龙江科技大学 一种cvd结合mao制备锂离子电池负极材料的方法

Also Published As

Publication number Publication date
EP1088358A1 (fr) 2001-04-04
JP2002541634A (ja) 2002-12-03

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