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WO2001091222A1 - Accumulateur au lithium comprenant un electrolyte polymere fabrique par un procede de pulverisation et son procede de fabrication - Google Patents

Accumulateur au lithium comprenant un electrolyte polymere fabrique par un procede de pulverisation et son procede de fabrication Download PDF

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Publication number
WO2001091222A1
WO2001091222A1 PCT/KR2000/000515 KR0000515W WO0191222A1 WO 2001091222 A1 WO2001091222 A1 WO 2001091222A1 KR 0000515 W KR0000515 W KR 0000515W WO 0191222 A1 WO0191222 A1 WO 0191222A1
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WO
WIPO (PCT)
Prior art keywords
lithium secondary
secondary battery
polymer electrolyte
polymer
casing
Prior art date
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Ceased
Application number
PCT/KR2000/000515
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English (en)
Korean (ko)
Inventor
Kyung Suk Yun
Byung Won Cho
Won Il Cho
Hyung Sun Kim
Un Seok Kim
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.)
Korea Institute of Science and Technology KIST
Original Assignee
Korea Institute of Science and Technology KIST
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.)
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Priority to PCT/KR2000/000515 priority Critical patent/WO2001091222A1/fr
Publication of WO2001091222A1 publication Critical patent/WO2001091222A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/36—Accumulators not provided for in groups H01M10/05-H01M10/34
    • H01M10/38—Construction or manufacture
    • 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
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/411—Organic material
    • H01M50/429—Natural polymers
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
    • 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
    • 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
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/411—Organic material
    • H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
    • 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
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0017—Non-aqueous electrolytes
    • H01M2300/0065—Solid electrolytes
    • H01M2300/0082—Organic polymers
    • 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 a lithium secondary battery comprising a polymer electrolyte fabricated by a spray method, and to its fabrication method.
  • a lithium secondary battery has been proposed as one energy source in the aspect that the higher integration of energy is possible because the molecular weight of lithium used in a lithium secondary battery is very low but its energy density is relatively high.
  • the early lithium secondary batteries were fabricated by using metallic lithium or a lithium alloy as an anode.
  • the cycle characteristic of the secondary battery using metallic lithium or a lithium alloy is lowered significantly due to dendrite formation on the anode as a result of repeated charging and discharging of the battery.
  • a lithium ion battery was proposed in order to solve the problem caused by the dendrites.
  • the lithium ion battery developed by SONY Company in Japan and widely used all over the world comprises a cathode active material, an anode active material, an organic electrolyte solution and a separator film.
  • the separator film functions to prevent internal short-circuiting of the lithium ion battery caused by contacting of a cathode and an anode, and to permeate ions.
  • Separator films generally used at the present time are polyethylene (hereinafter referred to as "PE”) or polypropylene (hereinafter referred to as "PP”) separator films.
  • PE polyethylene
  • PP polypropylene
  • the lithium ion battery using the PE or PP separator film still has problems such as instability, intricacy of the fabrication process, restriction of battery shape and limitation of capacity. There have been attempts to solve those problems, but there is no clear result until now.
  • a lithium polymer battery uses a polymer electrolyte having two functions, as a separator film and as an electrolyte, and it is now being viewed with keen interest as a battery being able to solve all of the problems.
  • the lithium polymer battery has an advantage in view of productivity because the electrodes and polymer electrolytes can be laminated in a flat-plate shape and its fabrication process is similar to the fabrication process of a polymer film.
  • a conventional polymer electrolyte is mainly prepared with polyethylene oxide (hereinafter referred to as "PEO"), but its ionic conductivity is merely 10 "8 S/cm at room temperature, and accordingly it can not be used commonly.
  • a polymer electrolyte of a gel type polyacrylonitrile (hereinafter referred to as "PAN") group was disclosed in U.S. Patent No. 5,219,679 to K. M. Abraham et al. and U.S. Patent No.5, 240,790 to D. L. Chua et al.
  • the gel type PAN group polymer electrolyte is prepared by injecting a solvent compound (hereinafter referred to as an "organic electrolyte solution”) prepared with a lithium salt and organic solvents, such as ethylene carbonate and propylene carbonate, etc., into a polymer matrix.
  • a solvent compound hereinafter referred to as an "organic electrolyte solution”
  • organic solvents such as ethylene carbonate and propylene carbonate, etc.
  • PVdF polyvinylidenedifluoride
  • the polymer electrolyte of hybrid type PVdF group is prepared by preparing a polymer separator film having a porosity of below submicron and followed by injecting an organic electrolyte solution into the pores. It has advantages in that its compatibility with an organic electrolyte solution is good, the electrolyte injected into the small pores is not leaked so as to be safe in use and the polymer separator film can be fabricated in the atmosphere because the organic solvent electrolyte is injected later.
  • the fabrication process is intricate because in preparation of the polymer electrolyte, an extraction process of a plasticizer and an impregnation process of the organic solvent electrolyte are required.
  • it has a serious disadvantage in that a process for forming a thin layer by heating and an extraction process are required in fabrication of electrodes and batteries because mechanical strength of the PVdF group electrolyte is good, but its adhesive strength is poor.
  • PMMA polymethylmethacrylate
  • PVC polyvinylchloride
  • an object of the present invention is to provide a new lithium secondary battery having advantages of both a lithium ion battery and a lithium polymer battery.
  • Another object of the present invention is to provide a lithium secondary battery having good adhesion with electrodes, good mechanical strength, good low- and high-temperature characteristics, and good compatibility with organic electrolyte solution used for a lithium secondary battery.
  • Figures 1a to 1c illustrate embodiments of a spray method by an electrostatic induction.
  • Figures 2a and 2b illustrate the fabrication method of a polymer electrolyte using a spraying machine.
  • Figures 3a to 3c illustrate process flow for fabricating lithium secondary batteries according to the present invention.
  • Figure 4 is a graph illustrating charge/discharge characteristics of the lithium secondary batteries of Examples 1-6 and Comparative Examples 1 and 2.
  • Figures 5a and 5b are graphs illustrating low- and high-temperature characteristics of the lithium secondary batteries of Example 2 and Comparative Example 2.
  • Figures 6a and 6b are graphs illustrating high-rate discharge characteristics of the lithium secondary batteries of Example 2 and Comparative Example 2.
  • the present invention relates to a lithium secondary battery comprising a polymer electrolyte fabricated by a spray method, and to its fabrication method. More particularly, it relates to a lithium secondary battery comprising a cathode active material, an anode active material, an organic electrolyte solution in which a lithium salt is dissolved and a polymer electrolyte, wherein the polymer electrolyte is characterized as being one fabricated by a spray method.
  • a polymer electrolyte fabricated by a spray method has a form in which particles or fibers, or a combination thereof having a diameter of 1-3000nm are built up three-dimensionally. Due to the small diameter, the ratio of surface area to volume and the void ratio are very high compared to those of a conventional electrolyte. Therefore, due to the high void ratio, the amount of electrolyte impregnated is large and the ionic conductivity is increased, and due to the large surface area, the contact area with the electrolyte can be increased and the leakage of electrolyte can be minimized in spite of the high void ratio.
  • the process for fabrication of a polymer electrolyte by a spray method comprises a step of obtaining a polymeric solution and a step of fabricating a polymer electrolyte using the obtained polymeric solution.
  • the step of obtaining a polymeric solution can be achieved by dissolving a polymer or polymer mixture in a mixture of plasticizer and an organic electrolyte solution.
  • the examples of the polymer used for forming the polymer electrolyte include polyethylene, polypropylene, cellulose, cellulose acetate, cellulose acetate butylate, cellulose acetate propionate, polyvinylpyrrolidone- vinylacetate, poly[bis(2-(2-methoxyethoxyethoxy))phosphagene], poly- ethyleneimide, polyethyleneoxide, polyethylenesuccinate, polyethylenesulfide, poly(oxymethylene-oligo-oxyethylene), polypropyleneoxide, polyvinylacetate, polyacrylonitrile, poly(acrylonitrile-co-methylacrylate), polymethylmethacrylate, poly(methylmethacrylate-co-ethylacrylate), polyvinylchloride, poly(vinylidene- chloride-co-acrylonitrile), polyvinylldenedifluoride, poly(vinylidenefluoride-co- hexafluoropropylene) or mixtures thereof.
  • plasticizer used for the present invention include propylene carbonate, butylene carbonate, 1 ,4-butyrolactone, diethyl carbonate, dimethyl carbonate, 1 ,2-dimethoxyethane, 1 ,3-dimethyl-2- imidazolidinone, dimethylsulfoxide, ethylene carbonate, ethylmethyl carbonate, N,N-dimethylformamide, N,N-dimethylacetamide, N-methyl-2- pyrrolidone, polyethylenesulforane, tetraethylene glycol dimethyl ether, acetone, alcohol or mixtures thereof, but it is not particularly limited on the above examples.
  • the organic electrolyte solution used for the present invention means a solution in which a lithium salt is dissolved in an organic solvent which does not affect the characteristics of electrodes.
  • the lithium salt used for the lithium secondary battery of the present invention is the same as generally used in the conventional lithium secondary battery. Examples include LiPF 6 , LiCI0 4 , LiAsF 6 , LiBF 4 and LiCF 3 SO 3 , and among them LiPF 6 is more preferable.
  • the organic solvent used for the organic electrolyte solution can include ethylene carbonate, propylene carbonate, diethyl carbonate, dimethyl carbonate, ethylmethyl carbonate or mixtures thereof.
  • an additional solvent such as methyl acetate,
  • butyrolactone 1 ,2-dimethoxyethane, 1 ,2-dimethoxyethane, dimethyl- acetamide, tetrahydrofuran or mixtures thereof, can be added to the above organic solvent.
  • a polymer, a plasticizer and an organic electrolyte solution are mixed in a ratio of 1 : 0.1 - 5 : 1 - 20 by weight.
  • the resulting mixture is stirred at a temperature range of 20-150°C for 30 minutes to 24 hours to obtain a clear polymeric solution.
  • the temperature and stirring time may be changed in accordance with the types of polymers.
  • the step of fabricating a polymer electrolyte with the obtained polymeric solution can be achieved by filling the polymeric solution into a barrel of a spray machine and then by spraying the polymeric solution onto a metal plate or Mylar film electrode using a nozzle at a suitable rate.
  • the polymeric solution can be sprayed directly onto the electrode.
  • FIGs 1a, 1b and 1c when spraying the polymeric solution using a nozzle, they can be sprayed by electrostatic induction.
  • Embodiments of spraying by electrostatic induction can include the following methods.
  • One method is that a nozzle and an electrode are connected to be each given an electrical potential in order that the polymeric solution coming out from the nozzle has an electrostatic charge (Figure 1a).
  • Another method is that an additional electrode for electrostatic induction is located between the nozzle and an electrode in order to charge the polymeric solution sprayed by the nozzle ( Figure 1 b).
  • Another method is to combine the above two methods ( Figure 1c).
  • FIGS. 2a and 2b illustrate the fabrication of a polymer electrolyte using a spray machine.
  • Figure 2a illustrates the fabrication method by spraying all together using a nozzle to get a polymer electrolyte.
  • Figure 2b illustrates the fabrication method by spraying sporadically and continually using separately installed nozzles to get a multi-layered polymer electrolyte.
  • the thickness of the polymer electrolyte can be adjusted by changing the spray rate and spray time.
  • the thickness of the polymer electrolyte is preferably adjusted in the range of 1 ⁇ m - 100 ⁇ m, more preferably in the
  • the diameter of the polymer forming the polymer electrolyte is preferably adjusted in the range of 1 nm - 3000 nm, more preferably 10 nm - 1000nm, and the most preferably 50 nm - 500 nm.
  • the polymer electrolyte fabricated by a spray method can comprise two or more polymers.
  • the polymer electrolyte comprising two or more polymers can be obtained by the following methods. One method is by dissolving two or more polymers in a mixture of a plasticizer and an organic electrolyte solution, filling the resulting solution into a barrel of a spray machine and then spraying the solution using a nozzle, to fabricate the polymer electrolyte. Another method is by respectively dissolving two or more polymers in a mixture of a plasticizer and an organic electrolyte, filling the resulting solutions into separate barrels of a spray machine, and then spraying the respective solutions using nozzles, to fabricate the polymer electrolyte.
  • the polymer electrolyte of the present invention can additionally include a filling agent in order to improve the porosity and mechanical strength.
  • a filling agent can include TiO 2 , BaTiO 3 , Li 2 O, LiF, LiOH, Li 3 N, BaO, Na 2 O, MgO, Li 2 CO 3 , LiAIO 2 , Si0 2 , AI 2 O 3 , PTFE or mixtures thereof. It is preferable that the content of the filling agent is below 20% by weight of the total polymer electrolyte.
  • Typical anode and cathode active materials used in the conventional lithium secondary battery can be used in the lithium secondary battery of the present invention.
  • the anode active material can include graphite, cokes, hard carbon, tin oxide, lithiated compounds thereof, metallic lithium or lithium alloys.
  • the cathode active material can include LiCIO 2 , LiNiO 2 , LiNiCoO 2 , LiMn 2 O 4 , V 2 O 5 or V 6 O 13 .
  • the lithium secondary battery of the present invention can further comprise conducting materials and bonding agents as in the conventional lithium secondary battery.
  • the anode and cathode of the lithium secondary battery are typically fabricated by mixing a certain amount of active materials, conducting materials and bonding agents with an organic solvent, casting the resulting mixture onto both sides of a copper or aluminum foil plate grid, and then drying and compressing all of them.
  • the present invention relates to a fabrication method of a lithium secondary battery, and Figures 3a through 3c illustrate the fabrication process in detail.
  • Figure 3a illustrates a process to fabricate a battery comprising inserting a polymer electrolyte fabricated by a spray method between an anode and a cathode, making the electrolytes and the electrodes into one body by a certain heat lamination process, inserting the resulting plate into a battery casing after laminating or rolling it, injecting an organic electrolyte solution into the battery casing, and then finally sealing the casing.
  • Figure 3b illustrates a process to fabricate a lithium secondary battery comprising coating a polymer electrolyte by spraying polymeric solutions directly onto both sides of a cathode or anode, adhering an electrode having opposite polarity to the coated electrode onto the polymer electrolyte, making the electrolytes and the electrodes into one body by a certain heat lamination process, inserting the resulting plate into a battery casing after laminating or rolling it, injecting an organic electrolyte solution into the battery casing, and then finally sealing the battery casing.
  • Figure 3c illustrates a process to fabricate a lithium secondary battery comprising coating a polymer electrolyte by spraying polymeric solutions directly onto both sides of one of two electrodes and onto one side of the other electrode respectively, adhering the electrodes closely together so the polymer electrolytes are faced to each other, making the electrolytes and the electrodes into one body by a certain heat lamination process, inserting the resulting plate into a battery casing after laminating or rolling it, injecting an organic electrolyte solution into the battery casing, and then finally sealing the battery casing.
  • Examples of the organic electrolyte solution used for the fabrication of the above lithium secondary battery are the same as the examples of the organic electrolyte solution used for dissolving polymers.
  • Example 1-1 The polymer electrolyte prepared in Example 1-1 was inserted between a graphite anode and a LiCoO 2 cathode. The resulting plates were
  • Example 2 2-1 To a mixture of 10Og of 1 M LiPF 6 solution in EC-DMC and 10g of
  • Example 2-1 obtained in Example 2-1.
  • the resulting plate was cut so as to be 3 cm x 4 cm
  • Example 3-1 The LiCoO 2 cathode obtained in Example 3-1 was adhered onto both sides of the graphite anode obtained in Example 2-1 so as to face the polymer electrolyte films to each other.
  • the resulting plate was made into one
  • polymeric solution was filled into a barrel of a spray machine and sprayed onto both sides of a graphite anode using a nozzle at a constant rate, to
  • Example 4-2 The process described In Example 4-1 was applied to one side of a LiCoO 2 cathode instead of to both sides of a graphite anode, to fabricate a LiCoO 2 cathode coated with a polymer electrolyte film on one side of it.
  • Example 4-3 The LiCoO 2 cathode obtained in Example 4-2 was adhered onto both sides of the graphite anode obtained in Example 4-1 so as to face the polymer electrolyte films to each other. The resulting plate was made into one
  • Example 5-1 obtained in Example 5-1 , and the resulting plate was cut so as to be 3 cm x
  • Example 6-1 The process described In Example 6-1 was applied to one side of a LiCoO 2 cathode instead of to both sides of a graphite anode, to fabricate a LiCoO 2 cathode coated with polymer electrolyte films on one side of it.
  • Example 6-3 The LiCoO 2 cathode obtained in Example 6-2 was adhered onto both sides of the graphite anode obtained in Example 6-1 so as to face the polymer electrolyte films to each other. The resulting plate was made into one
  • a lithium secondary battery was fabricated by laminating electrodes and separator films in order of an anode, a PE separator film, a cathode, a PE separator film and an anode, inserting the resulting laminated plate into a vacuum casing, injecting a 1M LiPF 6 solution in EC-DMC into the casing, and then finally vacuum-sealing the casing.
  • Example 7 When a 10,000cps viscosity suitable for casting was obtained, the polymeric solution was cast by die-casting to give a polymer electrolyte film.
  • a lithium secondary battery was fabricated by laminating in order of a graphite anode, an electrolyte, a LiCoO 2 cathode, an electrolyte and a graphite anode, welding terminals onto the electrodes, inserting the resulting laminated plate into a vacuum casing, injecting a 1M LiPF 6 solution in EC-DMC into the casing, and then finally vacuum-sealing the casing.
  • Example 7 Example 7
  • Example 9 High rate discharge characteristics of the lithium secondary batteries of Example 2 and Comparative Example 2 were tested, and Figures 6a and 6b illustrate the results (wherein Figure 6a is for the battery of Example 2 and Figure 6b is for the lithium secondary battery of Comparative example 2).
  • the tests for obtaining the high rate discharge characteristics of the lithium secondary batteries were performed by the charge/discharge method of, after charging the lithium batteries with a C/2 constant current and a 4.2 V constant voltage, discharging while varying the constant current to C/5, C/2,1C and 2C.
  • the lithium secondary battery of Example 2 showed capacities such as 99% at C/2 discharge, 96% at 1 C discharge and 90% at 2C discharge based on the value at C/5 discharge.
  • the lithium secondary battery of Comparative Example 2 showed low capacities such as 87% at 1C discharge and 56% at 2C discharge based on the value at C/5 discharge. Accordingly, it was discovered that the high rate discharge characteristic of the lithium secondary battery of Example 2 was better than that of the lithium secondary battery of Comparative Example 2.

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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
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  • Inorganic Chemistry (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention concerne un accumulateur au lithium et son procédé de fabrication. Elle porte notamment sur un accumulateur au lithium comprenant un électrolyte polymère poreux et sur son procédé de fabrication. Ledit électrolyte polymère est fabriqué selon le procédé suivant : a) dissolution d'au moins un polymère avec des plastifiants et des solvants électrolytiques organiques, de manière qu'au moins une solution électrolytique polymère soit obtenue ; b) addition de ladite solution électrolytique polymère dans une cuve d'une machine de pulvérisation ; et c) pulvérisation de la solution électrolytique polymère sur un substrat, au moyen d'une buse, de manière qu'un film électrolytique polymère poreux soit formé. L'accumulateur au lithium de l'invention est avantageux en ce qu'il adhère mieux aux électrodes, qu'il présente une bonne résistance mécanique, de bonne performances à températures faibles et élevées, une meilleure compatibilité avec les électrolytes organiques d'un accumulateur au lithium.
PCT/KR2000/000515 2000-05-22 2000-05-22 Accumulateur au lithium comprenant un electrolyte polymere fabrique par un procede de pulverisation et son procede de fabrication Ceased WO2001091222A1 (fr)

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Cited By (6)

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DE102007019663B4 (de) * 2007-04-26 2013-05-23 Dilo Trading Ag Separator für Lithium-Batterien und Verfahren zum Herstellen einer Einheit aus Separatormasse und Elektrodenmassen
DE102014009623A1 (de) 2014-06-27 2015-12-31 Daimler Ag Verfahren zur Herstellung einer Batterie und Befüllvorrichtung
US9923237B2 (en) 2014-04-18 2018-03-20 Seeo, Inc. Polymer composition with electrophilic groups for stabilization of lithium sulfur batteries
US10044064B2 (en) 2014-04-18 2018-08-07 Seeo, Inc. Long cycle-life lithium sulfur solid state electrochemical cell
CN110931845A (zh) * 2019-11-04 2020-03-27 浙江锋锂新能源科技有限公司 一种复合正极片、制备方法及固液混合锂蓄电池
JP2021528813A (ja) * 2018-09-28 2021-10-21 エルジー・ケム・リミテッド 電気化学素子用分離膜及びこれを製造する方法

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DE102007019663B4 (de) * 2007-04-26 2013-05-23 Dilo Trading Ag Separator für Lithium-Batterien und Verfahren zum Herstellen einer Einheit aus Separatormasse und Elektrodenmassen
US9923237B2 (en) 2014-04-18 2018-03-20 Seeo, Inc. Polymer composition with electrophilic groups for stabilization of lithium sulfur batteries
US10038217B2 (en) * 2014-04-18 2018-07-31 Seeo, Inc. Polymer composition with electrophilic groups for stabilization of lithium sulfur batteries
US10044065B2 (en) 2014-04-18 2018-08-07 Seeo, Inc. Polymer composition with electrophilic groups for stabilization of lithium sulfur batteries
US10044064B2 (en) 2014-04-18 2018-08-07 Seeo, Inc. Long cycle-life lithium sulfur solid state electrochemical cell
US10141604B2 (en) 2014-04-18 2018-11-27 Seeo, Inc. Polymer composition with electrophilic groups for stabilization of lithium sulfur batteries
US10153514B2 (en) 2014-04-18 2018-12-11 Seeo, Inc. Polymer composition with electrophilic groups for stabilization of lithium sulfur batteries
US10665895B2 (en) 2014-04-18 2020-05-26 Seeo, Inc. Polymer composition with olefinic groups for stabilization of lithium sulfur batteries
DE102014009623A1 (de) 2014-06-27 2015-12-31 Daimler Ag Verfahren zur Herstellung einer Batterie und Befüllvorrichtung
JP2021528813A (ja) * 2018-09-28 2021-10-21 エルジー・ケム・リミテッド 電気化学素子用分離膜及びこれを製造する方法
JP7374134B2 (ja) 2018-09-28 2023-11-06 エルジー エナジー ソリューション リミテッド 電気化学素子用分離膜及びこれを製造する方法
CN110931845A (zh) * 2019-11-04 2020-03-27 浙江锋锂新能源科技有限公司 一种复合正极片、制备方法及固液混合锂蓄电池

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