WO2007086289A1 - 非水電解質二次電池とその製造方法、実装方法 - Google Patents
非水電解質二次電池とその製造方法、実装方法 Download PDFInfo
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- WO2007086289A1 WO2007086289A1 PCT/JP2007/050578 JP2007050578W WO2007086289A1 WO 2007086289 A1 WO2007086289 A1 WO 2007086289A1 JP 2007050578 W JP2007050578 W JP 2007050578W WO 2007086289 A1 WO2007086289 A1 WO 2007086289A1
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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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
- H01M10/05—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
- 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
- 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
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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- 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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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
Definitions
- Non-aqueous electrolyte secondary battery manufacturing method and mounting method thereof
- the present invention relates to a non-aqueous electrolyte secondary battery that is strong against external short-circuiting and reverse charging and that can be easily mounted on a substrate.
- Lithium secondary batteries are often used for the main power source and backup power source of portable devices.
- a lithium secondary battery for knock-up use for example, a lithium aluminum alloy is used as an active material, and vanadium pentoxide, lithium-containing manganate or niobium pentoxide is used as an active material, respectively.
- lithium ion secondary batteries for main power supply for example, graphite spinel type lithium titanate is used for the negative electrode and lithium conoleate is used for the positive electrode.
- the knock-up lithium secondary battery shows a voltage of about 3V when the battery is configured.
- lithium-ion secondary batteries for main power supply have a voltage of about 0.2 to 0.3 V when the battery is configured, and develop a predetermined voltage such as 4 V or 2.5 V when charged.
- a lithium secondary battery that exhibits a voltage of about 3V when the battery is configured causes a significant performance deterioration due to a current flow caused by an external short circuit.
- external current shorts cause corrosion reactions of the current collector and outer cans, structural deterioration of the active material, and the like, leading to reduced battery performance.
- a lithium secondary battery for knock-up is mainly coin-shaped. Such a battery is attached by manually soldering or inserting it into the battery holder after the components are almost reflow-mounted.
- Patent Document 1 describes the resistance of each material.
- a larger current flows than at the actual specification (room temperature) because the resistance decreases at high temperatures. In some cases, a large current exceeding the battery's performance may cause the battery to deteriorate significantly.
- Patent Document 1 Japanese Patent Laid-Open No. 2000-48859
- the non-aqueous electrolyte secondary battery of the present invention includes a positive electrode, a negative electrode, and a non-aqueous electrolyte interposed between the positive electrode and the negative electrode.
- the positive electrode contains an active material capable of reversibly inserting and extracting lithium.
- the negative electrode includes an active material having the same composition as the active material of the positive electrode.
- a non-aqueous electrolyte secondary battery having such a configuration is easier to manufacture because its characteristics are unlikely to deteriorate even when an external short circuit occurs. It is also stable against reverse charging. Furthermore, almost no current flows in reflow mounting, so there is no need to apply a special design structure to the board. This non-aqueous electrolyte secondary battery generates voltage only when it is charged. Also, when reflow mounting, if it is mounted and force charged, it will not adversely affect the components on the board.
- FIG. 1 is a cross-sectional view of a coin-type battery that is a non-aqueous electrolyte secondary battery in an embodiment of the present invention.
- FIG. 2 is a cross-sectional view of a symmetrical battery that is a nonaqueous electrolyte secondary battery in an embodiment of the present invention.
- FIG. 1 is a cross-sectional view of a coin-type battery that is a non-aqueous electrolyte secondary battery in an embodiment of the present invention.
- This battery has a positive electrode 4, a negative electrode 5, and a nonaqueous electrolyte (not shown) interposed between the positive electrode 4 and the negative electrode 5.
- the positive electrode 4 is joined by one positive electrode can through conductive carbon as a current collector 7C.
- the negative electrode 5 is also joined to the negative electrode can 2 through the conductive carbon that is the current collector 7A.
- the positive electrode 4 and the negative electrode 5 are superposed via a separator 6 containing an organic electrolyte that is a non-aqueous electrolyte.
- the positive electrode can 1 is combined with the negative electrode can 2 through the gasket 3 and is then urged together with the negative electrode can 2 to form an outer can that seals the positive electrode 4, the negative electrode 5, the nonaqueous electrolyte, and the like.
- a single microporous film of polypropylene or polyethylene, a single non-woven fabric, a microporous film of a mixture, a non-woven fabric of a mixture, a non-woven fabric of polyphenylene sulfide, a glass fiber separator, a cellulose separator, or the like can be used.
- the organic electrolyte include ethylene carbonate, propylene carbonate, butylene power, boronate, y butyllatatane, sulfolane, 3-methylsulfolane, methyltetragram, 1,2-dimethoxyethane, methyldiglyme, methyltriglyme.
- LiPF LiBF, LiCIO, LiN (CF SO), LiN as a solute in a single solvent or mixed solvent such as butyl diglyme, dimethylol carbonate, ethyl methyl carbonate, and jetinole carbonate
- a solvent containing at least one of sulfolane, 3-methylsulfolane, and methyltetraglyme having a boiling point of 270 ° C. or higher it is preferable to use a solvent containing at least one of sulfolane, 3-methylsulfolane, and methyltetraglyme having a boiling point of 270 ° C. or higher.
- a solid electrolyte may be used as the non-aqueous electrolyte.
- a polymer solid electrolyte or an inorganic solid electrolyte may be used.
- Polymeric solid electrolytes include polyethylene oxide (PEO), polymethyl methacrylate (PMMA), polyfuckerbi-redene (P VDF) with LiN (CF SO) as a solute, and some of the organic solvents mentioned above Gel type
- the electrolyte can be used.
- inorganic solid electrolytes include lithium-containing metal oxide glasses such as LiPON (Lithium Phosphorus Nitride) and Li Zn (GeO), and Li
- lithium-containing sulfides such as S-SiS and thiolysicon.
- solid electrolyte lithium-containing sulfides such as S-SiS and thiolysicon.
- the separator 6 is not always necessary.
- the positive electrode 4 and the negative electrode 5 contain an active material having the same composition. That is, the positive electrode 4 includes an active material capable of reversibly occluding and releasing lithium, and the negative electrode 5 includes an active material having the same composition as the active material of the positive electrode 5.
- the voltage shows a value close to 0V when the battery is configured.
- the active material contained in the negative electrode 5 occludes lithium from the nonaqueous electrolyte. In this way, the composition ratio of lithium in the active material changes between the positive electrode 4 and the negative electrode 5 by charging, and this battery generates a voltage.
- the characteristics of the nonaqueous electrolyte secondary battery according to the present embodiment are unlikely to deteriorate even if an external short circuit occurs immediately after assembly. Therefore, when no voltage is required until it is installed in the device, the production can be simplified and made efficient without worrying about performance degradation due to external short circuit, etc., and productivity is remarkably improved. Also, when connecting terminals etc. to the battery, work without worrying about external short circuits. It can be changed greatly, and the product accuracy and the like are greatly improved. In addition, defects due to external short-circuits that have occurred in the past can be reduced and the defect rate can be reduced. Moreover, since the positive electrode 4 and the negative electrode 5 have the same configuration during reverse charging, problems such as severe deterioration and liquid leakage are eliminated. In addition, almost no current flows in reflow mounting, eliminating the need for a special design structure on the board. Even after charging and discharging, the same effect can be obtained by discharging until the voltage drops below 0.4.
- a transition metal oxide containing lithium that can insert and desorb lithium can be used as the active material.
- lithium-containing transition metal oxides having lithium insertion and desorption sites or transition metal oxides having lithium insertion and desorption sites may be mixed.
- the active material preferably contains a lithium-containing manganate salt.
- lithium-containing manganese oxides In addition to being able to reversibly insert and desorb lithium, lithium-containing manganese oxides
- lithium More than the amount of lithium contained in a stable state in the atmosphere, lithium can be occluded.
- lithium-containing manganates examples include lithiated ramsdellite-type manganese dioxide, orthorhombic Li-MnO, spinel-type Li-MnO (0 ⁇ X ⁇ 0.33) or
- Li Mn AO (A is Cr, Ni, l + X 2-X-y 4
- the active materials are LiCoO, LiNiO, LiNi Co O (0 to X 1) and LiCo Ni
- the metal oxide can desorb the contained lithium and can be used as a lithium source for the reaction. If mixed with lithium-containing manganate, the amount of lithium necessary for the reaction can be increased, and the application range of the charge / discharge conditions can be expanded.
- lithium-containing transition metal oxides that can insert and desorb the above-described lithium include Mn O, V O, V O, Nb O, WO, TiO, MoO, and lithium titanate Li Ti O
- Ti element substituted with a transition metal oxide can be mixed.
- Mn O, VO, VO, Nb O, WO, TiO and MoO do not contain lithium, but
- Li Ti O and its substitutes are transition metals containing lithium
- the contained lithium cannot be used in the reaction.
- external lithium can be inserted and removed.
- such a transition metal oxide plays a role of storing lithium during charging, and in addition, the application range of charging and discharging conditions can be expanded.
- the positive electrode 4 and the negative electrode 5 may contain a conductive agent and a binder in addition to the above various active materials!
- conductive agent graphite, carbon black, acetylene black, vapor grown carbon fiber (VGCF) or the like can be used.
- Styrene is preferred as the binder, such as polyterofluoroethylene (PTF E), tetrafluoroethylene, hexafluoropropylene copolymer (FEP), polyvinylidene fluoride (P VDF), etc.
- PPF E polyterofluoroethylene
- FEP tetrafluoroethylene
- P VDF polyvinylidene fluoride
- rubber-based materials such as butadiene rubber (SBR) and ethylene propylene gen rubber (EPDM).
- the materials of the positive electrode can 1 and the negative electrode can 2 that are exterior cans have the same composition.
- the positive electrode 4 and the negative electrode 5 have the same composition, so the voltage is almost 0V. Therefore, almost no current flows even when an external short circuit occurs.
- the materials of the positive electrode can 1 and the negative electrode can 2 are different, there is a subtle difference in potential between 0 and IV. This is because the stable potential of the outer can itself is different. The active material may be slightly deteriorated by this potential difference. Therefore, it is more preferable that the positive electrode can 1 and the negative electrode can 2 have the same composition. With this configuration, the stability is further increased, and the battery voltage is closer to 0V.
- the material for the outer can it is preferable to use aluminum or an aluminum alloy, and the aluminum alloy is more preferable than pure aluminum in terms of strength and corrosion resistance.
- an aluminum alloy containing manganese, magnesium or the like is preferable.
- the strength and corrosion resistance can be further increased by using a clad material of stainless steel or iron such as SUS30 4N with good workability and aluminum or aluminum alloy.
- stainless steel and iron with good workability such as SUS304N have low corrosion resistance, so they should be placed out of contact with the electrolyte.
- the ability to apply nickel plating to the surface of this clad material By using a three-layer clad of nickel Z stainless steel Z aluminum (aluminum alloy) from the beginning, the battery can be obtained with low contact resistance. It is done.
- an alloy containing at least one of iron, nickel and chromium and having a pitting corrosion index of 22 or more is very effective for corrosion resistance.
- the pitting corrosion index PRE (Pitting Resistance Equivalent) also leads to their content power.
- PRE is 0/0 Cr + 3. is defined by 3 X% Mo + 20 X% N, which is an indicator of corrosion resistance in Shioi ⁇ environment.
- Examples of such stainless alloys include SUS444, SUS329J3L, and SUS316.
- An alloy mainly composed of nickel and chromium may be used. These have very high strength and are preferably used for outer cans.
- the outer can also functions as a current collector.
- a cylindrical battery or a rectangular battery is preferably applied to an outer can, and a configuration in which aluminum is used for the positive and negative electrode current collectors is preferable.
- aluminum alloy, clad material, or alloy containing at least one of iron, nickel and chromium and having a pitting corrosion index of 22 or more and 70 or less an alloy mainly composed of nickel or chromium, use in combination. It is also possible.
- the coin-type secondary battery according to the present embodiment is preferably charged after being mounted by reflowing in a discharged state of 0. IV or less (uncharged or after charging / discharging). Since the battery itself has almost no voltage, almost no current flows through the circuit during reflow mounting, and the board components are not adversely affected! After mounting, the main power supply is connected and charged so that it has a voltage. When applying reflow mounting, there is no need to make a special design, which makes it possible to simplify the board design and reduce the number of components.
- the present invention may be applied to a non-aqueous electrolyte secondary battery in which the positive electrode can and the negative electrode can whose sectional view is shown in FIG. 2 are symmetrical.
- an electrode 11 having the same composition, weight and shape is opposed to an outer can 9 constituting a positive electrode can and a negative electrode can by a separator 12 containing an organic electrolyte.
- the outer cans 9 are sealed with each other by, for example, heat welding with an insulating sealing member 10 having a polyethylene force, thereby forming a symmetrical non-aqueous electrolyte secondary battery.
- the shape of the positive electrode can and the shape of the negative electrode can are symmetrical, the same discharge capacity can be obtained regardless of the polarity.
- This symmetrical non-aqueous electrolyte secondary battery In a pond, the positive and negative electrodes can be arbitrarily determined without first having to distinguish between forces, thus expanding the options for connecting devices. As a result, more margin can be obtained in the design and shape of the equipment.
- the battery itself can have a simpler configuration, which improves productivity.
- the positive electrode can 1 and the negative electrode can 2 that are outer cans each serve as a current collector, but in a cylindrical battery or a square battery, a sealing member provided with a terminal is provided.
- the plate is joined to the outer can.
- the positive electrode and the negative electrode each have a current collector and an active material layer provided thereon. Therefore, it is more preferable to use the outer can, the terminal, and the current collector having the same composition that is preferable to use the above-mentioned materials.
- LiNO and MnO were mixed at a molar ratio of 1: 3, pre-fired at 260 ° C for 5 hours, and then 340 ° C.
- the lithiated ramsteride-type manganate was prepared by baking for 5 hours.
- the acid mixture was mixed with carbon black as a conductive agent and PTFE as a binder to prepare an electrode mixture.
- the mixing ratio was 88: 5: 7 by weight.
- This electrode mixture was pressed into pellets having a diameter of 10 mm at 2 ton / cm 2 , and then dried in air at 250 ° C. to prepare positive electrode 4 and negative electrode 5, respectively.
- the weight ratio of the positive electrode 4 to the negative electrode 5 was 1.1: 1. That is, the weight of the positive electrode 4 was 1.1 times the weight of the negative electrode 5.
- the positive electrode 4 and the negative electrode 5 produced as described above were joined to the positive electrode can 1 and the negative electrode can 2 through conductive carbons as current collectors 7C and 7A, respectively. Note that a solution in which pitch was diluted with toluene in advance was applied to the inner periphery of the positive electrode can 1 and the outer periphery of the negative electrode can 2, and a sealant having a pitch force was provided by evaporating the toluene.
- a separator 6 made of polypropylene having a non-woven fabric force was placed on the positive electrode 4, and an organic electrolyte was dropped.
- the organic electrolyte was prepared by dissolving LiPF in an ImolZL (M) solution in a 1: 1 volume ratio of ethylene carbonate (EC) and dimethyl carbonate (DMC).
- the gasket 3 made of polypropylene is attached to the outer periphery of the negative electrode can 2, and the negative electrode can 1 is
- the electrode can 2 was fitted, and an organic electrolyte as a non-aqueous electrolyte was interposed between the positive electrode 4 and the negative electrode 5.
- the coin-type battery was completed by applying force to the positive electrode can 1.
- the battery dimensions were 16 mm in diameter and 1.6 mm in thickness.
- batteries B to M were produced in the same manner as battery A, except that the active material was changed.
- Na MnO is mixed with a mixture of LiNO and LiOH as the active material, and in the air
- Li MnO obtained by performing NaZLi exchange reaction by heating for 5 hours was used. Electric
- Battery D uses LiOH, MnO, B as active materials
- Li Mn B O was used.
- Battery E uses LiOH and MnO as active materials.
- Li Mn O obtained by mixing at a molar ratio of 1. 1 1. 85 0. 05 4 2 and firing at 450 ° C. for 5 hours was used.
- LiOH and MnO are mixed at a molar ratio of 1: 1 as the active material and fired at 450 ° C for 5 hours.
- Battery B uses Li as the active material
- MnO and LiMnO of battery C were mixed at a 1: 1 ratio.
- LiMn O and LiNiO are mixed as active materials in a 9: 1 molar ratio.
- LiMn O and LiCo Ni O are mixed in a 9: 1 molar ratio as active materials.
- Battery K uses LiMn O and LiCo Ni Mn O as active materials 9:
- LiMn O and WO of battery E are mixed at a 9: 1 molar ratio as the active material.
- LiCoO and WO were mixed at a 5: 5 molar ratio as the active material.
- the positive electrode active material is LiMn 2 O 3.
- the batteries A to M and the comparative battery were externally short-circuited in an atmosphere of 60 ° C, and then left in that state for 20 days. Thereafter, batteries A to M were charged to 1.5 V with a constant current of 0.5 mA, then discharged to 0.5 V with a constant current of 0.5 mA, and the discharge capacity after the test was measured. The comparative battery was charged to 4.2 V at a constant current of 0.5 mA, then discharged to 2.5 V at a constant current of 0.5 mA, and the discharge capacity was measured. For each battery, the initial discharge capacity was taken as 100, and the discharge capacity after the test was calculated. The results are shown in Table 1.
- Positive electrode can: Ni / SUS304 / AI
- Negative electrode can: SUS316
- Nonaqueous electrolyte 1M LiPF 6 / EC + DMC (1: 1)
- the batteries A to M in which the positive electrode 4 and the negative electrode 5 contain active materials having the same composition exhibited a discharge capacity of 90% or more even after the short-circuit test.
- the comparison battery is compared to battery A to battery M A large deterioration rate was exhibited.
- NiZSUS304ZAl aluminum cladding was used for positive electrode can 1 and negative electrode can 2.
- SUS316 (Cr: 16.1% by weight, Mo: 2.0% by weight, Ni: 1.2% by weight, Fe: 69% by weight, pitting corrosion index: 22.7) was used for the positive electrode can 1 and the negative electrode can 2.
- Cell in P cathode can 1, a negative electrode can 2 SUS329J3L (Cr: 22.0 wt 0/0, Mo: 3.1 wt 0/0, Ni: 4.84 wt 0/0, N: 0. 10 wt%, Fe: 68.5 wt % Pitting corrosion index: 34.2) was used.
- Battery Q cathode can 1, and the negative electrode can 2 SUS444 (Cr: 18.5 wt 0/0, Mo:. 2 1 wt 0/0, Fe: 77.8 wt%, pitting index: 25.4) was used.
- Battery R contains positive electrode can 1 and negative electrode can 2 with nickel: Cr: 23.2 wt%, Mo: 7.4 wt%, Ni: 35.4 wt%, N: 0.22 wt%, Fe: 33.4 wt% and pitting corrosion index 52.4 An alloy was used.
- Active material Li 1/3 Mn0 2
- Non-aqueous electrolyte 1M LiPF 6 / EC + DMC (1: 1)
- LiMn 2O similar to battery C was used as the electrode mixture. This electrode mixture is 0.1 ton / cm 2
- the weight ratio of the positive electrode 4 to the negative electrode 5 was 1.1: 1. That is, the weight of the positive electrode 4 was 1.1 times the weight of the negative electrode 5.
- a battery T having the above configuration and a diameter of 4.8 mm and a thickness of 1.4 mm was produced. Terminals were welded to positive electrode can 1 and negative electrode can 2 respectively.
- Battery U a solvent in which tetraglyme (TG) and diglyme (DG) were mixed at a volume ratio of 3: 7 instead of sulfolane was used as the solvent for the organic electrolyte. Otherwise, Battery U was fabricated in the same manner as Battery T. In battery al, the concentration of LiN (CF 2 SO 4) was set to 1.25M. That
- a battery al was produced in the same manner as Battery T, except for the above.
- the battery choke, U, al, a2, a3, and a4 thus prepared were passed through a reflow furnace.
- the reflow conditions are as follows.
- the temperature of the preheating zone is 150 ° C and the transit time is 2 minutes. did.
- the temperature was changed in the order of 180 ° C ⁇ 250 ° C ⁇ 180 ° C in about 80 seconds.
- the voltages of the battery T and the battery U before mounting were 0.004V and 0.003V, respectively.
- the voltages of batteries al, a2, a3, and a4 were also less than 0. IV.
- each battery was charged with a charge voltage of 1.5 V and a charge protection resistance of 3 k ⁇ . In addition, 0.
- the discharge capacity after reflow was measured by discharging to 0.5 V at a constant current of 005 mA. Separate batteries T, U, al, a2, a3, and a4 were prepared, charged and discharged under the above conditions without passing through a reflow furnace, and the initial discharge capacity was measured. Then, assuming the initial discharge capacity as 100, the ratio of the discharge capacity after reflow was calculated.
- Each battery was reflow-mounted so that the positive electrode side and the negative electrode side were reversed, and charging / discharging was performed under the above-described conditions.
- charge / discharge was performed under the above-mentioned conditions, and the discharge capacity was measured.
- the initial discharge capacity was set to 100, and the ratio of the discharge capacity after the reverse charge test was calculated. The results are shown in Table 3.
- TG Tetraglyme
- DG Diglyme
- batteries T, U, al, a2, a3, and a4 showed high capacity retention rates. In addition, it showed a capacity of 80% or more with no leakage even after reverse charging.
- a battery using SLF, TG, or DG as a solvent can maintain its discharge capacity even when exposed to high temperatures by reflow.
- a battery that can withstand reverse charging can be provided by forming the battery using the active material having the same composition for the positive electrode 4 and the negative electrode 5.
- sulfolane was used as the solvent of the organic electrolyte, and the concentration of LiN (CF SO) was 1.25M.
- the ratios with CoO were 9: 1, 8: 2, 7: 3, and 5: 5, respectively. Other than these are the same as battery a3
- Table 4 shows the results of evaluation similar to battery a3 for battery bl to battery b4 produced in this manner.
- Nonaqueous electrolyte 1.25M SLF
- the mixing ratio of LiMn O and LiCo Ni Mn O is 9 respectively.
- battery cl to battery c4 were produced in the same manner as battery bl.
- Table 5 shows the results of evaluations similar to those of batteries c1 to c4 produced in this way! /, And battery a3.
- Electrolyte 1.25M LiN (CF 3 S0 2 ) 2 / SLF
- battery a3 has a different composition ratio of Li and Mn.
- Li Mn O is used as the active material
- Battery dl is the same as battery al except that Li Mn O is used as the active material.
- a battery dl was produced in the same manner.
- the battery dl thus produced was evaluated in the same manner as battery T, and the results of battery al are shown in Table 6 (Table 6).
- Electrolyte 1.25 ⁇ LiN (CF 3 S0 2 ) 2 / SLF
- the battery dl showed a high capacity retention rate even after passing through reflow. In addition, it showed a capacity of 80% or more with no leakage even after reverse charging. Thus, regardless of the composition ratio of Li and Mn, the battery according to the present embodiment has high reflow resistance and reverse charge resistance.
- Each aluminum can 9 contains the same LiMn O as battery C.
- Electrode 11 of one configuration was joined. Then, the electrodes 11 were opposed to each other through a separator 12 containing an organic electrolyte, and a polyethylene insulating sealing member 10 was sealed by thermal welding to produce a symmetrical battery.
- a separator 12 containing an organic electrolyte As the organic electrolyte, a solution having the same composition and the same concentration as battery A was used. Battery V was fabricated with the above configuration.
- the coin shape is mainly used as the shape.
- the present invention is not limited to this. Similar results can be obtained with shapes such as cylindrical, square, and aluminum laminate.
- the non-aqueous electrolyte secondary battery according to the present invention is stable against reverse charging in a highly productive device, and can simplify the board design of the device. Its industrial value is extremely high.
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Abstract
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007800000480A CN101213704B (zh) | 2006-01-25 | 2007-01-17 | 非水电解液二次电池及其制造方法、安装方法 |
JP2007525891A JPWO2007086289A1 (ja) | 2006-01-25 | 2007-01-17 | 非水電解質二次電池とその製造方法、実装方法 |
US11/917,545 US20090087739A1 (en) | 2006-01-25 | 2007-01-17 | Non-aqueous electrolyte secondary battery, method for producing the same, and method for mounting the same |
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JP (1) | JPWO2007086289A1 (ja) |
KR (1) | KR100870814B1 (ja) |
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JP2008235260A (ja) * | 2007-02-24 | 2008-10-02 | Kyushu Univ | 二次電池 |
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JP2008235260A (ja) * | 2007-02-24 | 2008-10-02 | Kyushu Univ | 二次電池 |
EP1986255A3 (en) * | 2007-04-20 | 2010-04-28 | Nissan Motor Co., Ltd. | Secondary battery with non-aqueous electrolyte and corrosion-resistant collector |
JP2009123389A (ja) * | 2007-11-12 | 2009-06-04 | Kyushu Univ | 全固体二次電池 |
JP2009211965A (ja) * | 2008-03-05 | 2009-09-17 | Murata Mfg Co Ltd | リチウムイオン二次電池 |
JP2010205718A (ja) * | 2009-02-03 | 2010-09-16 | Sony Corp | 薄膜固体リチウムイオン二次電池及びその製造方法 |
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JP2011070861A (ja) * | 2009-03-31 | 2011-04-07 | Equos Research Co Ltd | 電池ケース及びそれを用いたリチウムイオン電池 |
JP2012527737A (ja) * | 2009-05-20 | 2012-11-08 | インフィニット パワー ソリューションズ, インコーポレイテッド | 電気化学デバイスを固定具の中および固定具上に一体化する方法 |
JP2016197595A (ja) * | 2009-05-20 | 2016-11-24 | インフィニット パワー ソリューションズ, インコーポレイテッド | 電気化学デバイスを固定具の中および固定具上に一体化する方法 |
JP2011129474A (ja) * | 2009-12-21 | 2011-06-30 | Namics Corp | リチウムイオン二次電池 |
WO2011077964A1 (ja) * | 2009-12-21 | 2011-06-30 | ナミックス株式会社 | リチウムイオン二次電池 |
CN102754269A (zh) * | 2009-12-21 | 2012-10-24 | 那米克斯公司 | 锂离子二次电池 |
JP2012174485A (ja) * | 2011-02-22 | 2012-09-10 | Fuji Heavy Ind Ltd | 正極活物質、これを用いたリチウムイオン蓄電デバイス、及びその製造方法 |
JP2013004421A (ja) * | 2011-06-20 | 2013-01-07 | Namics Corp | リチウムイオン二次電池 |
US9793573B2 (en) | 2011-06-20 | 2017-10-17 | Namics Corporation | Lithium ion secondary battery containing a non-polar active material |
WO2012176604A1 (ja) * | 2011-06-20 | 2012-12-27 | ナミックス株式会社 | リチウムイオン二次電池 |
JP2013191457A (ja) * | 2012-03-14 | 2013-09-26 | Seiko Instruments Inc | 非水電解質二次電池用の電解液及びこれを用いた非水電解質二次電池 |
WO2016051653A1 (ja) * | 2014-09-30 | 2016-04-07 | 三洋電機株式会社 | 非水電解質二次電池用正極及びそれを用いた非水電解質二次電池 |
JPWO2016051653A1 (ja) * | 2014-09-30 | 2017-07-13 | 三洋電機株式会社 | 非水電解質二次電池用正極及びそれを用いた非水電解質二次電池 |
US10601029B2 (en) | 2014-09-30 | 2020-03-24 | Sanyo Electric Co., Ltd. | Positive electrode for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery using the same |
JP2016100122A (ja) * | 2014-11-19 | 2016-05-30 | セイコーインスツル株式会社 | 電気化学セル及び電気化学セルの製造方法 |
WO2017057359A1 (ja) * | 2015-09-29 | 2017-04-06 | 株式会社村田製作所 | 非水電解質二次電池、蓄電デバイス、その製造方法、および蓄電回路 |
JPWO2017057359A1 (ja) * | 2015-09-29 | 2018-05-31 | 株式会社村田製作所 | 非水電解質二次電池、蓄電デバイス、その製造方法、および蓄電回路 |
CN108140893A (zh) * | 2015-09-29 | 2018-06-08 | 株式会社村田制作所 | 非水电解质二次电池、蓄电设备、其制造方法以及蓄电池电路 |
JP2019160618A (ja) * | 2018-03-14 | 2019-09-19 | セイコーインスツル株式会社 | 非水電解質二次電池 |
JP2021011620A (ja) * | 2019-07-09 | 2021-02-04 | Jfeスチール株式会社 | 硫化物系固体電池の集電体用のフェライト系ステンレス鋼板 |
JP7014754B2 (ja) | 2019-07-09 | 2022-02-01 | Jfeスチール株式会社 | 硫化物系固体電池の集電体用のフェライト系ステンレス鋼板 |
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Also Published As
Publication number | Publication date |
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US20090087739A1 (en) | 2009-04-02 |
TW200746498A (en) | 2007-12-16 |
KR100870814B1 (ko) | 2008-11-27 |
CN101213704A (zh) | 2008-07-02 |
KR20070095369A (ko) | 2007-09-28 |
CN101213704B (zh) | 2010-09-15 |
JPWO2007086289A1 (ja) | 2009-06-18 |
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