WO2012133564A1 - 二次電池負極集電体用電解銅箔及びその製造方法 - Google Patents
二次電池負極集電体用電解銅箔及びその製造方法 Download PDFInfo
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- WO2012133564A1 WO2012133564A1 PCT/JP2012/058200 JP2012058200W WO2012133564A1 WO 2012133564 A1 WO2012133564 A1 WO 2012133564A1 JP 2012058200 W JP2012058200 W JP 2012058200W WO 2012133564 A1 WO2012133564 A1 WO 2012133564A1
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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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D1/00—Electroforming
- C25D1/04—Wires; Strips; Foils
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/38—Electroplating: Baths therefor from solutions of copper
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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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
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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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/668—Composites of electroconductive material and synthetic resins
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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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- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12431—Foil or filament smaller than 6 mils
Definitions
- the present invention relates to an electrolytic copper foil for a secondary battery negative electrode current collector and a method for producing the same.
- a lithium ion battery has a positive electrode and a negative electrode in non-aqueous and aqueous electrolytes, a positive electrode active material bound on the surface of the positive electrode current collector, and a negative electrode active material bound on the surface of the negative electrode current collector. It becomes the composition.
- the evaluation is insufficient only by the correlation between the macro physical properties of the current collector such as tensile strength and elongation and the cycle properties. In some cases, the characteristics of the current collector cannot be sufficiently improved even if controlled.
- the present invention provides an electrolytic copper foil for a secondary battery negative electrode current collector that has high strength and is excellent in extensibility that can withstand changes in expansion and contraction in fine units, and a method for producing the same. Let it be an issue.
- the present inventor manufactured an electrolytic copper foil by setting the additive and electrolytic conditions to be added to the electrolytic solution during the production of the electrolytic copper foil to appropriate conditions.
- an electrolytic copper foil excellent in local elongation was obtained.
- the characteristics of the obtained electrolytic copper foil when comparing the nominal stress strain curve with the conventional electrolytic copper foil, the tensile strength, the elongation rate, and the relationship between the tensile strength and the breaking stress I found a point.
- the present invention completed on the basis of such knowledge, in one aspect, has a tensile strength of 45 to 70 kg / mm 2 in the nominal stress-strain curve, the tensile strength value is greater than the breaking stress value, and the elongation is
- This is an electrolytic copper foil for a secondary battery negative electrode current collector of 5% or more.
- the electrolytic copper foil for a secondary battery negative electrode current collector according to the present invention has a ratio of breaking stress / tensile strength of 90% to 99%.
- the electrolytic copper foil for a secondary battery negative electrode current collector according to the present invention has a tensile strength of 85% or more of the normal tensile strength after heating at 200 ° C. for 30 minutes.
- the thickness of the electrolytic copper foil is 6 to 20 ⁇ m.
- a copper sulfate electrolyte containing 2 to 5 mass ppm of glue as an additive is electrolyzed at an electrolysis temperature of 60 to 65 ° C. and a current density of 60 to 120 A / dm 2 , thereby It is a manufacturing method of the electrolytic copper foil for secondary battery negative electrode collectors including manufacturing an electrolytic copper foil.
- an electrolytic copper foil for a secondary battery negative electrode current collector that has high strength and is excellent in extensibility that can withstand changes in expansion and contraction in fine units, and a method for producing the same.
- the electrolytic copper foil according to the embodiment of the present invention has certain characteristics in terms of strength and elongation characteristics when a nominal stress-strain curve (SS curve) is observed. More specifically, as shown in the embodiment of FIG. 1, the value of tensile strength, which is the maximum stress in the nominal stress-strain curve (stress-strain diagram), is the value of the rupture stress indicating the value of the stress when ruptured. The value is larger than the value.
- SS curve nominal stress-strain curve
- the normal tensile strength of the electrolytic copper foil according to the embodiment of the present invention is that the tensile strength is 45 to 70 kg / mm 2 in the nominal stress-strain curve, and the tensile strength value is greater than the breaking stress value.
- the elongation is 5% or more.
- the ratio of the value of breaking stress / tensile strength is 90% or more and less than 100%, more preferably 92 to 99%, still more preferably 95 to 99%.
- the elongation of the electrolytic copper foil varies depending on the thickness of the electrolytic copper foil, but if the electrolytic copper foil has a thickness of about 10 ⁇ m, the elongation is 5% or more, more specifically 5 to 10%, more specifically. A large elongation of 5 to 8% can be obtained.
- the tensile strength of the electrolytic copper foil according to the embodiment of the present invention after heat treatment at 200 ° C. for 30 minutes is 85% or more of the normal tensile strength, and even in this case, the tensile strength value is the breaking stress. It is larger than the value and the elongation is 5% or more.
- the ratio of the value of the breaking stress / tensile strength of the electrolytic copper foil after heat treatment at 200 ° C. for 30 minutes is 90% or more and less than 100%, more preferably 92 to 99%, still more preferably 95 to 99%. is there.
- the elongation is 5% or more, more specifically 5 A large elongation of up to 10%, more specifically 5 to 8% can be obtained.
- tensile strength indicates a value when a tensile strength test based on IPC-TM-650 is performed
- breaking stress indicates a value when a test piece breaks.
- the “nominal stress strain curve (stress strain diagram)” for evaluating the characteristics of the electrolytic copper foil in the present invention is a graph showing the strain and the corresponding stress. A constant load is applied to the material at a constant speed. The stress and strain at the time of pulling with can be created using data obtained by a material test that simultaneously and continuously measures. “Elongation rate” indicates the amount of deformation when the test piece breaks in the above test.
- the nominal stress-strain curve (stress-strain diagram) is the basis for understanding the properties of a material, and was obtained from a material test in which a material was loaded and stress and strain were measured simultaneously and continuously. Can be created using data.
- FIG. 2 shows a typical schematic nominal stress-strain curve of oxygen-free copper. As the load is gradually applied to the material, the strain increases as the stress increases. Then, after the stress shows the maximum stress, the stress does not increase even if the strain further increases, and a phenomenon of decreasing is seen. This is because as the material stretches, a cross-sectional deformation (necking) occurs in a part of the material, and the cross-sectional area of the test piece decreases.
- the above-described nominal stress-strain curve is a diagram based on the nominal stress and the nominal strain.
- the nominal stress is a value obtained by dividing the load by the cross-sectional area before deformation, and is based on the cross-sectional area before deformation even if the deformation progresses and the cross-sectional area changes.
- the nominal strain is a value obtained by simply dividing the deformation amount by the length before deformation.
- the stress tends to increase as the elongation increases, but the true stress-strain curve in the present invention has a constant stress.
- a material having a “nominal stress-strain curve” that shows a maximum stress and then tends to break while reducing the stress is a material that breaks while part of the material undergoes cross-sectional deformation (necking). is there.
- the conventional copper foil so far does not apply to such a tendency.
- the differential value shows a maximum value twice in the nominal stress-strain curve
- the strain of the material increases (or grows) while the stress becomes constant or gradually increases, and the fracture and maximum stress values ( Tensile strength). This is because the copper foil is thin (for example, 20 ⁇ m or less) and is less affected by cross-sectional deformation.
- a foil with low elongation breaks from a portion that is likely to break before it undergoes cross-sectional deformation, whereas a foil with elongation has a uniform cross-section because the entire foil stretches uniformly, and after exhibiting constant elongation It is considered that the fracture occurs without deforming the cross section from the portion that is easily broken.
- the trend of the conventional electrolytic copper foil is shown in the example of FIG. 1 despite the thin foil shape of 6 to 20 ⁇ m.
- an electrolytic copper foil having a “nominal stress-strain curve” that tends to break while decreasing in stress after exhibiting maximum stress, it has a large elongation while having high strength. That is, this tendency is that the electrolytic copper foil according to the present invention is a thin foil, but after exhibiting the maximum stress, the electrolytic copper foil locally undergoes cross-sectional deformation (local elongation) and has a large elongation, leading to breakage. It shows that it is an electrolytic copper foil.
- the electrolytic copper foil according to the present invention is an electrolytic copper foil having high strength and large elongation, and further having the property of local elongation.
- the characteristics of the electrolytic copper foil according to the present invention that is excellent in extensibility while having high strength are, when used as an electrolytic copper foil for a secondary battery negative electrode current collector, a large volume of an active material during charging and discharging. It exhibits an advantageous effect in absorbing a large stress applied to the foil accompanying the change.
- excellent local elongation is considered to be the most excellent characteristic in absorbing variation in volume expansion of the active material.
- electrolytic copper foil according to the embodiment of the present invention contains relatively large crystal grains and small crystal grains in an appropriate ratio.
- the particle shape in the structure of the electrolytic copper foil can be evaluated by observing the cross section of the electrolytic copper foil using an electron microscope. That is, in the electrolytic copper foil according to the embodiment of the present invention, the crystal particles in the cross section can be classified into fine particles having an aspect ratio of less than 2.0 and columnar particles having an aspect ratio of 2.0 or more. The total area is 10 to 55%, and the remainder is fine particles. It is desirable that the fine particles present in the electrolytic copper foil, that is, the fine particles having an aspect ratio of less than 2.0 have an average particle size of 0.2 ⁇ m or less.
- the “aspect ratio” represents the ratio between the maximum diameter and the minimum diameter of the particles when the cross section of the electrolytic copper foil is observed with a microscope. Relatively large crystal grains contribute to the development of large elongation, and small crystal grains play a role of increasing strength.
- the area of the columnar particles means the area of the columnar particles having an aspect ratio of 2.0 or more that can be observed in the cross section of the electrolytic copper foil.
- the amount of columnar particles is too small, that is, when the area ratio of the columnar particles is less than 10%, the elongation rate may decrease and the warpage amount may increase.
- the area ratio exceeds 55%, the number of fine particles is relatively decreased, so that the strength may be lowered. Therefore, the total area of the columnar particles when the cross section is observed is 10 to 55% of the entire cross section.
- the lower limit of the average particle size is not particularly limited.
- the average particle size of the fine particles increases, the strength decreases and the difference between the columnar particles and the fine particles decreases, resulting in a peculiarity that “the stress decreases after showing the maximum stress”. No nominal stress-strain curve can be obtained. Therefore, it is a desirable form that the average particle size of the fine particles is 0.2 ⁇ m or less.
- the “average particle diameter” represents an average value when a copper layer cross section is observed by EBSP and the observed drawing is evaluated by a line segment method.
- the electrolytic copper foil according to the embodiment of the present invention has the above characteristics, so that the tensile strength after heating at 200 ° C. for 30 minutes is 85% or more of the normal tensile strength, more preferably 90% or more. More preferably, it is 95% or more. Thereby, the electrolytic copper foil excellent in press workability and slit workability is obtained.
- the electrolytic copper foil according to the embodiment of the present invention has a surface roughness Rz smaller than that of a conventional electrolytic copper foil, a surface roughness Rz of 2.0 ⁇ m or less, further 1.8 ⁇ m or less, and further 1.2 to 1 0.7 ⁇ m.
- the value of “surface roughness Rz” indicates a result measured by a roughness test based on JIS-B-0601. Thereby, adhesiveness with the antirust layer etc. which are apply
- the thickness of the electrolytic copper foil is not limited to the following, but when used as an electrolytic copper foil for a secondary battery negative electrode current collector, for example, 20 ⁇ m or less, preferably 18 ⁇ m or less, more preferably 15 ⁇ m or less, the above characteristics. You can get enough.
- the lower limit of the thickness is not limited to the following, but is, for example, 6 ⁇ m or more.
- a sulfuric acid-based electrolytic solution to which 2 to 5 mass ppm of glue is added is used at an electrolysis temperature of 60 to 65 ° C. and a current density of 60 to 120 A / dm 2 .
- electrolysis More specifically, an electrolytic cell in which a rotating drum made of titanium or stainless steel having a diameter of about 3000 mm and a width of about 2500 mm and an electrode is disposed around the drum with an inter-electrode distance of about 3 to 10 mm. It can manufacture using a copper foil manufacturing apparatus. Note that this example of the device is an example, and the specification of the device is not particularly limited.
- a glue concentration: 2.0 to 10.0 mass ppm is added to a sulfuric acid electrolyte having a copper concentration of 80 to 110 g / L and a sulfuric acid concentration of 70 to 110 g / L.
- the linear velocity was adjusted to 1.5 to 5.0 m / s
- the electrolyte temperature was adjusted to 60 to 65 ° C.
- the current density was adjusted to 60 to 120 A / dm 2 to deposit copper on the surface of the rotating drum.
- the copper deposited on the surface is peeled off to continuously produce an electrolytic copper foil.
- electrolysis with an electrolytic solution temperature of 60 to 65 ° C. and a current density of 60 to 120 A / dm 2 is a suitable condition for obtaining an electrolytic copper foil having the above-mentioned characteristics.
- the temperature adjustment is characteristic.
- the rust prevention treatment is a coating treatment of chromium oxide alone or a mixture coating treatment of chromium oxide and zinc / zinc oxide.
- Chromium oxide and zinc / zinc oxide mixture film treatment is a method of forming zinc or zinc oxide comprising zinc oxide and chromium oxide by electroplating using a plating bath containing zinc salt or zinc oxide and chromate. It is the process which coat
- a mixed aqueous solution of at least one of dichromates such as K 2 Cr 2 O 7 and Na 2 Cr 2 O 7 , CrO 3 and the like, an alkali hydroxide and an acid is used.
- a mixed aqueous solution of the above aqueous solution and at least one of water-soluble zinc salts such as ZnO 4 and ZnSO 4 .7H 2 O can also be used.
- Roughening treatment can be performed as needed before rust prevention treatment.
- roughening particles one kind of plating of copper, cobalt, nickel or alloy plating of two or more kinds thereof can be formed.
- roughened particles are formed by three-part alloy plating of copper, cobalt, and nickel.
- the copper foil for the negative electrode current collector for the secondary battery is provided with a cobalt-nickel alloy plating layer, a zinc-nickel alloy on the roughened surface on both the front and back surfaces in order to improve heat resistance and weather resistance (corrosion resistance). It is desirable to form at least one rust-proofing layer or heat-resistant layer and / or silane coupling layer selected from a plating layer and a chromate layer.
- a silane treatment in which a silane coupling agent is applied to both surfaces or the deposited surface on the rust preventive layer may be performed.
- the silane coupling agent used for the silane treatment include olefin silane, epoxy silane, acrylic silane, amino silane, and mercapto silane, which can be appropriately selected and used.
- the application method may be any of spraying a silane coupling agent solution by spraying, coating with a coater, dipping, pouring and the like.
- Example 1 In the electrolytic cell, a titanium rotating drum having a diameter of about 3133 mm and a width of 2476.5 mm and an electrode distance of about 5 mm were arranged around the drum. A copper concentration: 90 g / L, a sulfuric acid concentration: 80 g / L, and a glue concentration: 3 mass ppm were introduced into the electrolytic cell to obtain an electrolytic solution. Then, the electrolyte temperature was adjusted to 60 ° C., the current density was adjusted to 85 A / dm 2 , copper was deposited on the surface of the rotating drum, the copper deposited on the surface of the rotating drum was peeled off, and the thickness was continuously 10 ⁇ m. An electrolytic copper foil having a roughness Ra of 1.6 ⁇ m was produced.
- the electrolytic copper foil of Example 1 was subjected to a tensile strength test based on IPC-TM-650 to evaluate the tensile strength, breaking stress, and elongation, and prepare a nominal stress strain curve. The results are shown in FIG. In Example 1, the tensile strength was 62.3 kg / mm 2 , the breaking stress was 59.6 kg / mm 2 , the elongation was 7%, and the tensile strength value was larger than the breaking stress value. As a result of observing the cross section of the electrolytic copper foil of Example 1 using EBSP, fine particles having an aspect ratio of less than 2.0 and columnar particles of 2.0 or more were present. The total area of the columnar particles with respect to the entire cross section was 31%.
- the average particle size of the fine particles was 0.2 ⁇ m.
- the electrolytic copper foil of Example 1 was subjected to a tensile strength test based on IPC-TM-650 for the normal state (23 ° C.) and the electrolytic copper foil after heating at 200 ° C. for 30 minutes. The tensile strength after heating for 30 minutes was 97% of the normal tensile strength.
- Comparative Example 1 An ingot containing Sn 0.07% based on oxygen-free copper is made into a plate having a thickness of about 10 mm by hot rolling, then cold rolling and recrystallization annealing are repeated, and finally finished to a thickness of 10 ⁇ m by cold rolling. The final rolling degree was in the range of 85 to 95%.
- a tensile strength test similar to that of Example 1 was performed on the rolled copper foil of Comparative Example 1, and the tensile strength, breaking stress, and elongation rate were evaluated, and a nominal stress-strain curve was prepared. The results are shown in FIG.
- Example 3 The electrolytic copper foil of Comparative Example 3 was subjected to the same tensile strength test as in Example 1 to evaluate the tensile strength, breaking stress, and elongation rate, and prepare a nominal stress strain curve. The results are shown in FIG.
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Abstract
Description
電解槽の中に、直径約3133mm、幅2476.5mmのチタン製の回転ドラムと、ドラムの周囲に5mm程度の極間距離を置いて電極を配置した。この電解槽の中に、銅濃度:90g/L、硫酸濃度:80g/L、にかわ濃度:3質量ppmを導入して電解液とした。そして、電解液温:60℃、電流密度:85A/dm2に調節し、回転ドラムの表面に銅を析出させ、回転ドラムの表面に析出した銅を剥ぎ取り、連続的に厚さ10μm、表面粗さRa1.6μmの電解銅箔を製造した。
実施例1の電解銅箔に対して、IPC-TM-650に基づき引張り強さ試験を実施し、引張り強さ、破断応力、伸び率を評価するとともに、公称応力ひずみ曲線を作製した。結果を図1に示す。
実施例1の引張り強さは62.3kg/mm2、破断応力は59.6kg/mm2、伸び率は7%であり、引張り強さの値が破断応力の値よりも大きくなった。
実施例1の電解銅箔の断面をEBSPを用いて観察した結果、アスペクト比が2.0未満の微細粒子と2.0以上の柱状粒子が存在していた。断面全体に対する柱状粒子の面積の合計は31%であった。微細粒子の平均粒径は0.2μmであった。
実施例1の電解銅箔に対し、常態(23℃)の場合と、200℃30分間加熱した後の電解銅箔についてそれぞれIPC-TM-650に基づく引張強さ試験を実施したところ、200℃30分間加熱した後の引張り強さが常態引張り強さの97%であった。
無酸素銅ベースのSn0.07%入りインゴットを熱間圧延により厚さ10mm程度の板とし、その後冷間圧延と再結晶焼鈍を繰り返し、最後に冷間圧延で10μmの厚みに仕上げる。最終圧延加工度は85~95%の範囲で実施した。
比較例1の圧延銅箔に対して、実施例1と同様の引張り強さ試験を実施し、引張り強さ、破断応力、伸び率を評価するとともに、公称応力ひずみ曲線を作製した。結果を図1に示す。
電解槽の中に、直径約3133mm、幅2476.5mmのチタン製の回転ドラムと、ドラムの周囲に5mm程度の極間距離を置いて電極を配置した。この電解槽の中に、銅濃度:90g/L、硫酸濃度:80g/L、さらに添加剤ビス(3-スルホプロピル)ジスルフィド:30ppm、1分子中に1個以上のエポキシ基を有する化合物とアミン化合物とを付加反応させることにより得られる特定骨格を有するアミン化合物:30ppm、塩素イオン:60ppmを導入して電解液とした。そして、電解液温:53℃、電流密度:60A/dm2に調節し、回転ドラムの表面に銅を析出させ、回転ドラムの表面に析出した銅を剥ぎ取り、連続的に厚さ10μmの電解銅箔を製造した。
比較例2の電解銅箔に対して、実施例1と同様の引張り強さ試験を実施し、引張り強さ、破断応力、伸び率を評価するとともに、公称応力ひずみ曲線を作製した。結果を図1に示す。
電解槽の中に、直径約3133mm、幅2476.5mmのチタン製の回転ドラムと、ドラムの周囲に5mm程度の極間距離を置いて電極を配置した。この電解槽の中に、銅濃度:90g/L、硫酸濃度:80g/L、さらに添加剤にかわ:3ppm、塩素イオン:60ppm導入して電解液とした。そして、電解液温:53℃、電流密度:106A/dm2に調節し、回転ドラムの表面に銅を析出させ、回転ドラムの表面に析出した銅を剥ぎ取り、連続的に厚さ10μmの電解銅箔を製造した。
比較例3の電解銅箔に対して、実施例1と同様の引張り強さ試験を実施し、引張り強さ、破断応力、伸び率を評価するとともに、公称応力ひずみ曲線を作製した。結果を図1に示す。
Claims (5)
- 公称応力ひずみ曲線において、引張り強さが45~70kg/mm2であり、引張り強さの値が破断応力の値よりも大きく、伸び率が5%以上である二次電池負極集電体用電解銅箔。
- 破断応力/引張り強さの値の比が90%以上99%以下である請求項1に記載の二次電池負極集電体用電解銅箔。
- 200℃30分間加熱した後の引張り強さが、常態引張り強さの85%以上である請求項1又は2に記載の二次電池負極集電体用電解銅箔。
- 前記電解銅箔の厚みが6~20μmである請求項1~3のいずれか1項に記載の二次電池負極集電体用電解銅箔。
- 添加剤としてニカワを2~5質量ppm加えた硫酸銅電解液を、電解温度60~65℃、電流密度60~120A/dm2で電解することにより、請求項1~4のいずれか1項に記載の電解銅箔を製造することを含む二次電池負極集電体用電解銅箔の製造方法。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201280016217.0A CN103460464B (zh) | 2011-03-30 | 2012-03-28 | 二次电池负极集电体用电解铜箔及其制造方法 |
| US14/009,041 US20140030591A1 (en) | 2011-03-30 | 2012-03-28 | Electrolytic copper foil for an anode of a negative electrode collector in a secondary battery and method of producing the same |
| EP12764898.8A EP2693542A1 (en) | 2011-03-30 | 2012-03-28 | Electrolytic copper foil for secondary battery anode collector and method for producing same |
| KR1020137026280A KR20130130860A (ko) | 2011-03-30 | 2012-03-28 | 이차 전지 부극 집전체용 전해 동박 및 그 제조 방법 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011076629A JP5074611B2 (ja) | 2011-03-30 | 2011-03-30 | 二次電池負極集電体用電解銅箔及びその製造方法 |
| JP2011-076629 | 2011-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012133564A1 true WO2012133564A1 (ja) | 2012-10-04 |
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|---|---|
| US (1) | US20140030591A1 (ja) |
| EP (1) | EP2693542A1 (ja) |
| JP (1) | JP5074611B2 (ja) |
| KR (1) | KR20130130860A (ja) |
| CN (1) | CN103460464B (ja) |
| MY (1) | MY164458A (ja) |
| TW (1) | TWI460915B (ja) |
| WO (1) | WO2012133564A1 (ja) |
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| WO2014038717A1 (ja) * | 2012-09-10 | 2014-03-13 | Jx日鉱日石金属株式会社 | 表面処理銅箔及びそれを用いた積層板 |
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| JP5362922B1 (ja) * | 2012-10-12 | 2013-12-11 | Jx日鉱日石金属株式会社 | 表面処理銅箔及びそれを用いた積層板 |
| JP5362923B1 (ja) * | 2012-10-12 | 2013-12-11 | Jx日鉱日石金属株式会社 | 表面処理銅箔及びそれを用いた積層板 |
| JP5362924B1 (ja) * | 2012-11-09 | 2013-12-11 | Jx日鉱日石金属株式会社 | 表面処理銅箔及びそれを用いた積層板 |
| JP5362921B1 (ja) * | 2012-11-09 | 2013-12-11 | Jx日鉱日石金属株式会社 | 表面処理銅箔及びそれを用いた積層板 |
| TWI484073B (zh) * | 2012-11-09 | 2015-05-11 | Jx Nippon Mining & Metals Corp | Surface treatment of copper foil and the use of its laminated board, copper laminated board, printed wiring board and electronic equipment |
| KR20150070380A (ko) * | 2012-11-09 | 2015-06-24 | 제이엑스 닛코 닛세키 킨조쿠 가부시키가이샤 | 표면 처리 동박 및 그것을 사용한 적층판, 구리 피복 적층판, 프린트 배선판 그리고 전자 기기 |
| CN104781451A (zh) * | 2012-11-09 | 2015-07-15 | Jx日矿日石金属株式会社 | 表面处理铜箔及使用其的积层板 |
| US9232650B2 (en) | 2012-11-09 | 2016-01-05 | Jx Nippon Mining & Metals Corporation | Surface treated copper foil and laminate using the same |
| JP5362898B1 (ja) * | 2012-11-09 | 2013-12-11 | Jx日鉱日石金属株式会社 | 表面処理銅箔及びそれを用いた積層板、プリント配線板並びに銅張積層板 |
| KR101660663B1 (ko) | 2012-11-09 | 2016-09-27 | 제이엑스금속주식회사 | 표면 처리 동박 및 그것을 사용한 적층판, 구리 피복 적층판, 프린트 배선판 그리고 전자 기기 |
| US9504149B2 (en) | 2012-11-09 | 2016-11-22 | Jx Nippon Mining & Metals Corporation | Surface treated copper foil and laminate using the same |
| US9730332B2 (en) | 2012-11-09 | 2017-08-08 | Jx Nippon Mining & Metals Corporation | Surface treated copper foil and laminate using the same, printed wiring board, and copper clad laminate |
| JP2016223018A (ja) * | 2016-08-23 | 2016-12-28 | 三井金属鉱業株式会社 | 表面処理銅箔、負極集電体及び非水系二次電池の負極材 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20130130860A (ko) | 2013-12-02 |
| EP2693542A1 (en) | 2014-02-05 |
| CN103460464A (zh) | 2013-12-18 |
| JP2012212529A (ja) | 2012-11-01 |
| TWI460915B (zh) | 2014-11-11 |
| MY164458A (en) | 2017-12-15 |
| JP5074611B2 (ja) | 2012-11-14 |
| TW201246675A (en) | 2012-11-16 |
| US20140030591A1 (en) | 2014-01-30 |
| CN103460464B (zh) | 2017-08-29 |
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