WO2002041420A1 - Nonaqueous lithium secondary cell - Google Patents
Nonaqueous lithium secondary cell Download PDFInfo
- Publication number
- WO2002041420A1 WO2002041420A1 PCT/JP2001/009710 JP0109710W WO0241420A1 WO 2002041420 A1 WO2002041420 A1 WO 2002041420A1 JP 0109710 W JP0109710 W JP 0109710W WO 0241420 A1 WO0241420 A1 WO 0241420A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- negative electrode
- surface area
- lithium
- specific surface
- electrode
- Prior art date
Links
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 72
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000000463 material Substances 0.000 claims abstract description 49
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 40
- 238000004438 BET method Methods 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 239000011255 nonaqueous electrolyte Substances 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 67
- 239000007773 negative electrode material Substances 0.000 claims description 23
- 101150107341 RERE gene Proteins 0.000 claims description 2
- 239000003792 electrolyte Substances 0.000 description 17
- 239000002245 particle Substances 0.000 description 16
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 12
- 229910001416 lithium ion Inorganic materials 0.000 description 12
- -1 manganese hydride Chemical compound 0.000 description 12
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- 229910052782 aluminium Inorganic materials 0.000 description 10
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- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910000428 cobalt oxide Inorganic materials 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
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- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/24—Electrodes characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- H01G11/34—Carbon-based characterised by carbonisation or activation of carbon
-
- 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
- H01M10/052—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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/04—Hybrid capacitors
- H01G11/06—Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/50—Electrodes characterised by their material specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation
-
- 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
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- 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
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- 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
- 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
- Y02E60/13—Energy storage using capacitors
-
- 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 non-aqueous lithium secondary battery having both high energy density and high output.
- the second requirement is that the output characteristics be stable.
- a high-efficiency engine and a power storage system for example, a hybrid electric vehicle
- a fuel cell and a power storage system for example, a fuel cell electric vehicle
- the engine or fuel cell is the largest.
- the power storage system In order to operate efficiently, it is necessary to operate at a constant output.To cope with load-side output fluctuations or energy regeneration, the power storage system must have high output discharge characteristics and / or high rate charging acceptance characteristics. Is required.
- the nickel-metal hydride battery currently used in hybrid electric vehicles has achieved a high output of 2 kW / l or more, and has an energy density of about 160 WW1.
- research is being actively conducted to further improve the reliability by further increasing the energy density and further improving the stability at high temperatures.
- Research is also underway on increasing the output of lithium-ion batteries.
- the development of lithium-ion batteries capable of obtaining a high output exceeding 3 kW / l at a DOD of 50% The energy density is less than 100 WM, and the high energy density, which is the largest glue of lithium-ion batteries, is deliberately suppressed. It has a designed design.
- LiCo0 2, LiMn 2 0 4s LiNi0 2 lithium composite oxide typified used as a cathode material for lithium ion batteries, as well as the graphite-based materials used as the negative electrode, for example, of 5 minutes level rapid In discharging, the capacity is significantly lower than that in 1C discharging, so a large breakthrough is still required to improve the performance of lithium-based secondary batteries. .
- active carbon used for a capacitor that is a high-output device generally has a specific surface area of 1000 m 2 / g or more.
- the efficiency and remarkably low electrode density of the activated carbon make the activated carbon high output and high capacity. It was difficult to use it for a battery that had a combination.
- an object of the present invention is to provide a lithium secondary battery having high energy density, high power, and high output.
- the present invention provides the following non-aqueous lithium secondary battery:
- the positive electrode, the specific surface area by BET method of 500 meters 2 / g or more porous carbonaceous material is Rere electrochemically occluding has a BET specific surface area of 500 meters 2 / g or more porous carbonaceous material and lithium And a mixture with releasable materials,
- a non-aqueous lithium secondary battery wherein the negative electrode is made of a carbonaceous material having a specific surface area of 20 to 100 mg by the BET method.
- the positive electrode is made of a porous carbonaceous material having a specific surface area of 500 m 2 / g or more by the BET method and a material capable of electrochemically occluding and releasing lithium, from 100/0 to 30/70 (weight 2.
- non-aqueous lithium secondary battery according to any one of items 1 to 4, wherein the negative electrode material is a material in which the surface of activated carbon is coated with a carbonaceous material.
- FIG. 1 is a graph showing characteristics of a non-aqueous lithium secondary battery according to Example 3 of the present invention and characteristics of a non-aqueous lithium secondary battery according to Comparative Example 1.
- the positive electrode material in the lithium-based secondary battery of the present invention is a porous carbonaceous material having a specific surface area of 500 m 2 / g or more by the BET method alone or a porous carbon material having a specific surface area of 500 m 2 / g or more. Consists of a mixture with materials that can be chemically stored and released.
- the specific surface area by the BET method If not more than 500 m 2 / g (hereinafter, simply referred to as “specific surface area” unless necessary), the raw material is not limited, and examples thereof include activated carbon and carbon black such as Ketjen black.
- the specific surface area of the porous carbonaceous material must be 500 m 2 / g or more, more preferably 1000 m 2 / g or more, and further preferably 1500 m 2 / g or more. If the specific surface area of the porous carbon material is too low, the doping amount of the anion species described below decreases, and sufficient capacity cannot be obtained during high-power discharge.
- the specific surface area of the porous carbonaceous material used for the positive electrode is preferably 2500 m 2 / g or less from the viewpoint of the filling rate.
- a porous carbonaceous material and a material capable of occluding and releasing lithium can be used in combination (hereinafter, such a material used in combination is simply referred to as a “combined material”). Sometimes).
- Such a combined material is not limited as long as it can occlude and release lithium in an electrically conductive manner. Examples thereof include lithium composite cobalt oxide, lithium composite nickel oxide, lithium composite manganese oxide, and lithium composite manganese oxide.
- a mixture of oxides, these composite oxides or composites are mixed with a mixture of composite oxides, and further mixed metal elements (for cobalt-based oxide, Ni, Mn, Fe, V, Al, Mg, etc .; for Ni-based oxide) , Co, Mn, Fe, V, Al, M, etc .; a composite manganese sulfide which is obtained by adding at least one of Co, Ni, Fe, V, Al, Mg, etc. to a manganese hydride. Can be used.
- the amount of the dissimilar metal element to be added can be appropriately selected according to the required performance of the combined material, the combination of the metals constituting the composite oxide, and the like.
- the “combined material capable of occluding and releasing lithium electrically” does not include the above-described porous carbonaceous material having a specific surface area of 500 m 2 / g or more.
- the porous carbonaceous material is doped with an anion in the electrolyte at the time of charging the battery, and the anion is dedoped at the time of discharging.
- This doping / de-doping reaction is extremely fast, for example, capable of following the high power discharges of cells above 10C.
- porous carbon is used as the positive electrode.
- the material can be used alone.
- it is necessary to achieve a high output and a high capacity: ⁇ uses a porous carbon material and a combination material together.
- the capacity of the combined material in the present invention varies depending on its specific gravity, but a material capable of utilizing a specific capacity of at least 100 mAh / g or more is preferable.
- a specific surface area of 500 meters 2 / g or more or a porous carbonaceous material alone or a specific surface area of 500 meters 2 / g or more porous carbonaceous material Department electrically I ⁇ absorbing and lithium Force of using a mixed material in combination with a releasable material ⁇ How to determine the mixing ratio when a mixed material is used is appropriately determined according to the specifications of the intended battery. For example, when a battery is used in a hybrid electric vehicle, the time required for high output is relatively short, and it can be used if it lasts 10 seconds. Can be.
- the mixing ratio of the combined material is 70% or less based on the total weight of both materials. It is more preferable that the content be 50% or less. If the mixing ratio of the combined materials exceeds 70%, sufficient output cannot be obtained.
- the negative electrode of the present invention is made of a carbonaceous material having a specific surface area of usually 20 to 1000 m 2 , more preferably 50 to 800 m 2 / g, and still more preferably 100 to 600 m 2 / g by the BET method. If the specific surface area is too small, a sufficient output cannot be obtained, whereas if the specific surface area is too large, the initial charge / discharge efficiency of lithium ions is significantly reduced and the electrode using the negative electrode material is used. Density decreases, and the capacity per volume decreases. In addition, in order to increase the transfer rate of lithium ions from the negative electrode to the electrolyte, it is necessary to allow the electrolyte to sufficiently enter the inside of the active material. It is preferred to control the amount appropriately.
- the negative electrode material for a lithium secondary battery according to the present invention has the above-described characteristics and structure, and As far as possible, the material is not particularly limited. However, in consideration of the movement of lithium ions in the active material, an amorphous carbon material is more preferable. Amorphous carbon materials have a gentler charge / discharge curve than crystalline materials such as graphite, so they can charge and discharge lithium at a higher rate than crystalline materials. It is also preferable in this respect.
- the capacity of the negative electrode material of the lithium secondary battery according to the present invention is 400 mAJb / g or more, particularly preferably 500 mA / g or more.
- a material of about 200 to 300 mAh / g as a negative electrode active material of a lithium ion battery.
- the porosity of the negative electrode that holds the electrolyte (the porosity of the negative electrode material itself and the porosity caused by the gap between the negative electrode material particles in the molded negative electrode) (Total) is preferably set to be about 35 to 60%.
- the active material capacity is less than 400 mAh / g, the energy density of the battery tends to decrease.
- Preferable negative electrode materials for lithium-based secondary batteries satisfying the above requirements include amorphous carbon (polyacene-based material, amorphous carbon, etc.). More specifically, it can be obtained by forming a coating layer made of an amorphous carbonaceous material (polyacene-based material, amorphous carbon, etc.) on the surface of the core carbon particles (core carbon particles). Surface area 20 ⁇ : Carbonaceous material (laminated particle material) with about I000m 2 / g is more preferable. Such a laminated particle material can be manufactured, for example, as follows.
- nuclear carbon particles having an average particle diameter of about 1 to 500 ⁇ m (more preferably about 1 to 50 ⁇ m) and a specific surface area of 100 m 2 / g or more (more preferably 600 m 2 / g or less) (active , Charcoal, polyacene-based substances, etc .; hereinafter referred to as “activated carbon”), such as phenolic resin, polyparaffinylene, polyphenylene sulfide, mesocarbon microbeads, pitch, pitch type » Coating to form a coating layer on the surface by performing heat treatment in the co-presence; or carbon precursor capable of forming a coating layer by heat treatment (liquid organic substance, tar, pitch, synthetic resin dissolved in organic solvent) Solid carbon material) on the activated carbon surface and then heat-treating to form a coating layer; or xylene, base, which can form a coating layer by heat treatment in the gas phase.
- activated carbon such as phenolic resin, polyparaffinylene, polyphenylene
- Heat-treating the activated carbon in an inert atmosphere containing hydrocarbon gas such as It is manufactured by any method.
- the activated carbon is not limited in its raw material as long as the obtained laminated particle material exhibits desired characteristics, and is a commercially available product obtained from various raw materials such as petroleum, coal, plant, and polymer. Can be used.
- the heat treatment is preferably performed at a temperature of about 500 to 1500 ° C., particularly about 500 to 70 ° C., in order to coat the activated carbon surface with an amorphous carbonaceous material such as an amorphous carbon or a polyacene-based substance. It is desirable to coat the activated carbon surface with a polyacene-based material by heat treatment.
- the laminated particle material provided with the coating layer made of the polyacene-based material is suitable from the viewpoint of safety because the heat generated by the reaction with the electrolyte at a temperature of about 150 ° C. in the state doped with lithium is small, .
- the amount of the carbonaceous material that coats the activated carbon may be appropriately determined according to the structure or properties (pore diameter, porosity, etc.) of the activated carbon used as a raw material, and is not limited. It is about 80%.
- the negative electrode material in the present invention has an initial efficiency of 30% or more (preferably 50% or more) and a capacity of 300 mAh / g or more (preferably 320 mA / g or more, more preferably 400 mAh or more) at a discharge rate of 4000 mA / g. / g or more).
- This value can be measured by, for example, an electrode obtained by the above-described method using the negative electrode material for a lithium secondary battery of the present invention.
- the carbon source has a specific surface area according to the BET method of 20 to: L000 mg but does not have the above-mentioned initial efficiency and / or capacity, in the case where the desired high energy density and high output are obtained, It is not possible to obtain a lithium-based secondary battery that combines
- the negative electrode material in the present invention can be doped with lithium in advance. By doping lithium in advance, the initial efficiency, capacity, output characteristics, etc. of the battery can be controlled.
- the predoping of the negative electrode material in the present invention is preferably performed electrochemically after forming the negative electrode material of the present invention into an electrode. More specifically, a method of pre-doping a non-aqueous electrolyte solution to be described later in a state where an electric drama system using lithium metal is assembled as a counter electrode before battery assembly, and a negative electrode impregnated with the electrolyte solution And a method of laminating lithium metal.
- a lithium source such as lithium metal is attached to the negative electrode, and the electrolyte is injected into the battery while both are electrically inverted. By doing so, it can be done.
- the method of forming the positive electrode material and the negative electrode material of the present invention into an electrode can be appropriately selected from known methods according to the desired shape and characteristics of the nonaqueous secondary battery.
- an electrode can be obtained by mixing a positive electrode material (or a negative electrode material), a binder resin, and, if necessary, a conductive agent, and then molding.
- the type of the binder resin is not particularly limited, but fluorine resins such as polyvinylidene fluoride and polytetrafluoroethylene, fluorine rubber, SBR, acrylic resin, and polyolefins such as polyethylene and polypropylene. And the like.
- the amount of the binder mixed in the positive electrode and the negative electrode is not particularly limited, and may be appropriately determined according to the type, particle size, shape, thickness, strength, and the like of the positive electrode material and the negative electrode material of the present invention. For example, it is usually preferable to set the ratio to about 1 to 30% of the weight of the positive electrode material or the negative electrode material of the present invention.
- the material of the current collector is not particularly limited, and a copper foil, a stainless steel foil, a titanium foil, or the like can be used. Further, a structure in which an electrode can be formed on a metal foil or in a gap between metals, for example, an expanded metal, a net material, or the like can be used as a current collector.
- the electrolyte in the battery of the present invention a known nonaqueous electrolyte such as a nonaqueous electrolyte containing a lithium salt, a polymer monoelectrolyte, and a polymer gel electrolyte can be used.
- the type of the positive electrode material, the properties of the negative electrode material, and the charge It is determined as appropriate depending on usage conditions such as voltage.
- the electrolyte preferably has a conductivity of lxl (J 3 S / cni or more, and has a conductivity of 3xl (J3 ⁇ 4 / cm or more). more preferable.
- non-aqueous electrolyte solution containing a lithium salt e.g., LiPF s, LiBF 4, LiC10 4 propylene carbonate lithium salt such as, ethylene carbonate, di-E chill carbonate, dimethyl carbonate, methylate Honoré ethyl Honoré carbonate, dimethyl
- a lithium salt e.g., LiPF s, LiBF 4, LiC10 4 propylene carbonate lithium salt
- the concentration of the electrolyte is not particularly limited, Generally, it is practically about 0.5 to 2 mol / l It is naturally desirable that the water content in the electrolyte is as low as possible, and 100 ppm or less. Preferred.
- the term "non-aqueous electrolyte” includes not nonaqueous electrolyte and chromatic Mobile ⁇ only, a gel and a solid electrolyte of Means an electrolyte containing
- the shape and size of the non-aqueous secondary battery of the present invention are not particularly limited, and an arbitrary form such as a cylindrical type, a square type, a film battery, and a box type can be selected according to the application. it can.
- a non-aqueous lithium secondary battery having high energy density and high power can be obtained.
- the weight of the obtained carbonaceous material-coated activated carbon after heat treatment was 50% greater than that of the raw material pitch-based activated carbon, and the specific surface area (measurement equipment: Yuasa Ionicsune; "NOVA1200”) was measured by the BET method. As a result, it was 550 m 2 / g.
- lithium metal as a counter electrode and a reference electrode
- LiPF 6 at a concentration of lmol / 1 in a mixed solvent of ethylene carbonate and methyl ethyl carbonate at a 3: 7 weight ratio.
- An electrochemical cell was prepared in an argon dry box using a solution in which was dissolved as an electrolyte. The doping of lithium is based on the weight of active material until it reaches ImV with respect to lithium potential. Doping was performed at a rate of lOOmA / g! / ⁇ , and an imV constant [] 3 ⁇ 4 for lithium potential was applied for 20 hours to complete the doping.
- the capacity was measured while changing the charge rate and the discharge rate.
- discharge at 4000 mA / g or 5 minutes at a rate of 4000 roA / g with respect to the active material weight until ImV with respect to lithium potential, and apply a constant voltage of ImV with respect to lithium potential.
- the total charging time was 5 minutes), and a capacity of 400 mAh / g or more was obtained.
- the created battery was charged to 4.2V with a current of 2mA, and then a constant-current constant-voltage charge of applying a constant voltage of 4.2V was performed for 8 hours. Then, the battery was discharged to 2.5 V at a constant current of 2 mA. The discharge capacity was 6 mAh.
- the battery is charged to 4.2V with a current of 5mA, and then a constant-current constant-voltage charge of applying a constant voltage of 4.2V is performed for 8 hours, followed by a 10-second discharge at a current of 750mA, and a 1-minute (Current: 750mA)
- the charging operation was repeated 10 times, but the current could be extracted at a high rate exceeding 30C.
- the electrodes (50 mm x 30 mm) prepared in (1) were used as a positive electrode and a negative electrode, and were opposed to each other via a separator (electrolytic capacitor paper: 52 mm x 32 mm) to assemble an electric double layer capacitor.
- electrolytic solution a solution obtained by dissolving triethylmethylammonium tetrafluoroborate in propylene carbonate at a concentration of 1.5 mol / l was used.
- the prepared electric double layer capacitor was charged to 2.5V with a current of 2mA, and then a constant current constant voltage charge of applying a constant voltage of 2.5V was performed for 8 hours. Subsequently, the battery was discharged to IV at a constant current of 1 mA.
- the discharge capacity was 2.7 mAli. Next, charge the battery to 2.5 V with a current of 2 mA, then apply a constant voltage of 2.5 V.After 8 hours of constant current and constant charge, discharge with a current of 500 mA. It became.
- the obtained carbonaceous material-coated activated carbon after heat treatment has a 29% increase in weight compared to the raw pitch-based activated carbon, and has a specific surface area by the BET method (measurement equipment: Yuasa Ionicsune: "NOVA1200").
- Weight-based activated carbon has a 29% increase in weight compared to the raw pitch-based activated carbon, and has a specific surface area by the BET method (measurement equipment: Yuasa Ionicsune: "NOVA1200").
- the prepared battery was charged to 4.0 V with a current of 2 mA, and then a constant current and constant voltage charge of applying a constant voltage of 4.0 V was performed for 8 hours. Subsequently, the battery was discharged to 2.0 V at a constant current of 13 mA. The discharge capacity was 11.3 mAli.
- the battery was charged to 4.0 V with a current of 2 mA, and thereafter, a constant-current constant-voltage charge of applying a constant voltage of 4.0 V was performed for 8 hours. Then, the battery was discharged to 2.0 V at a constant current of 130 mA. The discharge capacity was 9.8 mAh. After charging in the same manner, the battery was discharged to 2.0 V at a constant current of 780 mA. The discharge capacity was 7 mAh.
- FIG. 1 shows the discharge curves of the batteries obtained in Example 3 and Comparative Example 2 under each condition.
- Comparative Example 2 (1) 100 parts by weight of commercially available pitch-based activated carbon (particle size: ⁇ ; specific surface area: 2000 m 2 / g), 5 parts by weight of Ketjen black, 250 parts by weight of PVdFlO, and 250 parts by weight of NMP I got This slurry is applied to both sides of a 20 ⁇ m-thick aluminum foil as a current collector, dried and pressed, and used as a positive electrode and a negative electrode in a 320 ⁇ -thick electrode C ((2) below). To do). In addition, one side of a 20-inch thick aluminum foil is coated, dried and pressed to obtain an electrode D having a thickness of 170 ⁇ ⁇ (used as a positive electrode and a negative electrode in (2) below). Was. The density of both the obtained electrodes was 0.62 g / cc in the deviation.
- the created battery was charged to 2.5 V with a current of 2 mA, and then a constant current and constant voltage charge of applying a constant voltage of 2.5 V was performed for 8 hours. Subsequently, the battery was discharged to 0 V at a constant current of 10 mA. The discharge capacity was 7.5 mA.
- the battery was charged to 4.0 V with a current of 2 mA, and thereafter, a constant-current constant-voltage charge of applying a constant voltage of 4.0 V was performed for 8 hours, followed by discharging to 0 V at a constant current of 100 mA.
- the discharge capacity was 6.8 mAh.
- the battery was discharged to 0 V at a constant current of 600 mA.
- the discharge capacity was 5.5 mAh.
- the nonaqueous secondary battery according to the present invention using a porous carbonaceous material for the negative electrode has a higher voltage and capacity than a conventional electric double layer capacitor. It is clear that the output characteristics are excellent.
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Priority Applications (9)
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KR1020037003523A KR100807702B1 (ko) | 2000-11-17 | 2001-11-07 | 비수계 리튬 2차 전지 |
DK01980993.8T DK1341247T3 (da) | 2000-11-17 | 2001-11-07 | Ikke-vandig lithium-sekundærcelle |
AU2002212716A AU2002212716B2 (en) | 2000-11-17 | 2001-11-07 | Nonaqueous lithium secondary cell |
JP2002543720A JP4288465B2 (ja) | 2000-11-17 | 2001-11-07 | 非水系リチウム二次電池 |
US10/381,513 US7838150B2 (en) | 2000-11-17 | 2001-11-07 | Nonaqueous lithium secondary battery with carbon electrodes |
AU1271602A AU1271602A (en) | 2000-11-17 | 2001-11-07 | Nonaqueous lithium secondary cell |
AT01980993T ATE528820T1 (de) | 2000-11-17 | 2001-11-07 | Wasserfreie lithium-sekundärzelle |
EP01980993A EP1341247B1 (en) | 2000-11-17 | 2001-11-07 | Nonaqueous lithium secondary cell |
CA2423043A CA2423043C (en) | 2000-11-17 | 2001-11-07 | Nonaqueous lithium secondary battery |
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US (1) | US7838150B2 (ja) |
EP (1) | EP1341247B1 (ja) |
JP (2) | JP4288465B2 (ja) |
KR (1) | KR100807702B1 (ja) |
CN (1) | CN1224122C (ja) |
AT (1) | ATE528820T1 (ja) |
AU (2) | AU1271602A (ja) |
CA (1) | CA2423043C (ja) |
DK (1) | DK1341247T3 (ja) |
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- 2001-11-07 CN CNB018156770A patent/CN1224122C/zh not_active Expired - Fee Related
- 2001-11-07 DK DK01980993.8T patent/DK1341247T3/da active
- 2001-11-07 US US10/381,513 patent/US7838150B2/en not_active Expired - Fee Related
- 2001-11-07 PT PT01980993T patent/PT1341247E/pt unknown
- 2001-11-07 AU AU1271602A patent/AU1271602A/xx active Pending
- 2001-11-07 AT AT01980993T patent/ATE528820T1/de active
- 2001-11-07 ES ES01980993T patent/ES2370703T3/es not_active Expired - Lifetime
- 2001-11-07 CA CA2423043A patent/CA2423043C/en not_active Expired - Lifetime
- 2001-11-07 WO PCT/JP2001/009710 patent/WO2002041420A1/ja active Application Filing
- 2001-11-07 AU AU2002212716A patent/AU2002212716B2/en not_active Ceased
- 2001-11-07 EP EP01980993A patent/EP1341247B1/en not_active Expired - Lifetime
- 2001-11-07 KR KR1020037003523A patent/KR100807702B1/ko active IP Right Grant
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Cited By (26)
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JP2003077458A (ja) * | 2001-09-06 | 2003-03-14 | Denso Corp | リチウム二次電池電極及びリチウム二次電池 |
JP4527931B2 (ja) * | 2002-08-16 | 2010-08-18 | 旭化成株式会社 | 非水系リチウム型蓄電素子 |
JP2004079321A (ja) * | 2002-08-16 | 2004-03-11 | Asahi Kasei Electronics Co Ltd | 非水系リチウム型蓄電素子 |
US20040185330A1 (en) * | 2003-01-20 | 2004-09-23 | Akira Yamaguchi | Non-aqueous electrolyte battery |
US9219257B2 (en) * | 2003-01-20 | 2015-12-22 | Sony Corporation | Non-aqueous electrolyte battery with gas adsorbing carbon material |
JP2005019762A (ja) * | 2003-06-27 | 2005-01-20 | Asahi Kasei Electronics Co Ltd | 非水系リチウム型蓄電素子 |
JP2005039139A (ja) * | 2003-07-18 | 2005-02-10 | Asahi Kasei Electronics Co Ltd | 非水系リチウム型蓄電素子および製造方法 |
JP2005158719A (ja) * | 2003-10-30 | 2005-06-16 | Yuasa Corp | リチウムイオン二次電池 |
JP2006164689A (ja) * | 2004-12-06 | 2006-06-22 | Enerstruct Kk | 電極構造体、二次電池及びキャパシタ |
JP2006278234A (ja) * | 2005-03-30 | 2006-10-12 | Tdk Corp | 電気化学デバイス |
US9012089B2 (en) | 2007-07-17 | 2015-04-21 | Fuji Jukogyo Kabushiki Kaisha | Electric storage device |
EP2017911A1 (en) | 2007-07-17 | 2009-01-21 | Fuji Jukogyo Kabushiki Kaisha | Electric Storage Device |
EP2040320A1 (en) | 2007-09-18 | 2009-03-25 | Fuji Jukogyo Kabushiki Kaisha | Electric Storage Device |
US8283072B2 (en) | 2007-09-18 | 2012-10-09 | Fuji Jukogyo Kabushiki Kaisha | Electric storage device |
US8007936B2 (en) | 2007-11-12 | 2011-08-30 | Fuji Jukogyo Kabushiki Kaisha | Electric storage device |
JP2009135540A (ja) * | 2009-03-17 | 2009-06-18 | Asahi Kasei Corp | 非水系リチウム型蓄電素子および製造方法 |
JP2010267875A (ja) * | 2009-05-15 | 2010-11-25 | Asahi Kasei Corp | 非水系リチウム型蓄電素子用負極、及びそれを用いた非水系リチウム型蓄電素子 |
WO2012001988A1 (ja) | 2010-07-01 | 2012-01-05 | パナソニック株式会社 | 非水電解質二次電池 |
US8530086B2 (en) | 2010-07-01 | 2013-09-10 | Panasonic Corporation | Non-aqueous electrolyte secondary battery |
WO2014088074A1 (ja) | 2012-12-06 | 2014-06-12 | 旭化成株式会社 | 非水系リチウム型蓄電素子 |
US9748045B2 (en) | 2012-12-06 | 2017-08-29 | Asahi Kasei Kabushiki Kaisha | Nonaqueous lithium storage element |
WO2015080253A1 (ja) | 2013-11-29 | 2015-06-04 | 旭化成株式会社 | リチウムイオンキャパシタ |
US10002718B2 (en) | 2013-11-29 | 2018-06-19 | Asahi Kasei Kabushiki Kaisha | Lithium ion capacitor |
WO2017126686A1 (ja) | 2016-01-22 | 2017-07-27 | 旭化成株式会社 | 非水系リチウム蓄電素子 |
KR20180087421A (ko) | 2016-01-22 | 2018-08-01 | 아사히 가세이 가부시키가이샤 | 비수계 리튬 축전 소자 |
US10403447B2 (en) | 2016-01-22 | 2019-09-03 | Asahi Kasei Kabushiki Kaisha | Nonaqueous lithium storage element |
Also Published As
Publication number | Publication date |
---|---|
JP2009105052A (ja) | 2009-05-14 |
US7838150B2 (en) | 2010-11-23 |
EP1341247A1 (en) | 2003-09-03 |
PT1341247E (pt) | 2011-11-09 |
CN1224122C (zh) | 2005-10-19 |
KR20030066613A (ko) | 2003-08-09 |
CN1459132A (zh) | 2003-11-26 |
JPWO2002041420A1 (ja) | 2004-03-25 |
CA2423043A1 (en) | 2003-03-19 |
KR100807702B1 (ko) | 2008-03-03 |
DK1341247T3 (da) | 2011-11-21 |
ES2370703T3 (es) | 2011-12-22 |
US20040023118A1 (en) | 2004-02-05 |
AU2002212716B2 (en) | 2006-10-05 |
CA2423043C (en) | 2011-04-19 |
EP1341247B1 (en) | 2011-10-12 |
JP4288465B2 (ja) | 2009-07-01 |
AU1271602A (en) | 2002-05-27 |
ATE528820T1 (de) | 2011-10-15 |
JP5008637B2 (ja) | 2012-08-22 |
EP1341247A4 (en) | 2005-03-02 |
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