JP2002279999A - Metal foil for secondary battery collector, and method of manufacturing the same - Google Patents
Metal foil for secondary battery collector, and method of manufacturing the sameInfo
- Publication number
- JP2002279999A JP2002279999A JP2001075351A JP2001075351A JP2002279999A JP 2002279999 A JP2002279999 A JP 2002279999A JP 2001075351 A JP2001075351 A JP 2001075351A JP 2001075351 A JP2001075351 A JP 2001075351A JP 2002279999 A JP2002279999 A JP 2002279999A
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- Japan
- Prior art keywords
- metal foil
- active material
- hardness
- thickness
- foil
- Prior art date
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Classifications
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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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- Cell Electrode Carriers And Collectors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、主としてニッケ
ル、銅、鉄、アルミニウム、さらにはそれらをマトリッ
クスとする合金等の金属を素材とする二次電池用集電材
に適した金属箔およびそれを製造する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal foil suitable for a current collector for a secondary battery mainly made of a metal such as nickel, copper, iron, and aluminum, and an alloy containing them as a matrix, and to manufacture the same. On how to do it.
【０００２】[0002]
【従来の技術】近年、パソコンや携帯電話など電子機器
の急激な普及に伴い、ニッケル水素二次電池やリチウム
・イオン二次電池、さらにはリチウムポリマー二次電池
など大量の充放電可能な電池が使用されている。また、
最近では、電気自動車などの動力源としてもこれらの電
池が使用されている。2. Description of the Related Art In recent years, with the rapid spread of electronic devices such as personal computers and mobile phones, a large number of rechargeable batteries such as nickel-metal hydride secondary batteries, lithium ion secondary batteries, and lithium polymer secondary batteries have become available. It is used. Also,
Recently, these batteries have also been used as power sources for electric vehicles and the like.
【０００３】この二次電池の基本構造は、箔状の金属
集電体、集電体に可逆的に電気化学反応を起こす物
質、いわゆる活物質を塗布した電極、正極および負極
を分離するセパレーター、電解液および電池ケースか
らなっている。The basic structure of this secondary battery is as follows: a foil-shaped metal current collector, an electrode coated with a substance which causes a reversible electrochemical reaction on the current collector, a so-called active material, a separator for separating a positive electrode and a negative electrode, It consists of an electrolyte and a battery case.
【０００４】この様な二次電池において、上記にあげ
る箔状の金属集電体に必要な特性として、活物質の担持
性が挙げられる。この活物質の担持性を改善する方法と
して、金属箔に貫通する孔を多数個設け、金属箔の両面
に付着させる活物質を活物質どうしの結合力で担持性を
改善しようとする方法（特開平11-323593号公報、参
照）が知られている。[0004] In such a secondary battery, the properties required for the above-mentioned foil-shaped metal current collector include the ability to support an active material. As a method of improving the supportability of the active material, a method of providing a large number of holes penetrating through the metal foil and trying to improve the supportability of the active material to be attached to both surfaces of the metal foil by the binding force between the active materials (particularly, Japanese Unexamined Patent Publication No. Hei 11-323593) is known.
【０００５】[0005]
【発明が解決しようとする課題】前述したように二次電
池は、いろいろな電子機器で用いられるため、その大き
さや形状は多種多様である。特に、小型化が進む携帯用
電子機器では、小さなボタン状の二次電池が使用され
る。この様な場合、金属箔に貫通する孔を多数個設けて
活物質の担持性を改善する方法は、集電体としての体積
が減少することから集電能力を低下させる。As described above, since secondary batteries are used in various electronic devices, their sizes and shapes are various. In particular, a small button-shaped secondary battery is used in a portable electronic device that is being miniaturized. In such a case, a method of improving the supportability of the active material by providing a large number of holes penetrating through the metal foil decreases the current collecting ability because the volume as the current collector is reduced.
【０００６】前記にあげた活物質を塗布した電極は、
金属箔の両面に活物質を塗布した後、加熱して乾燥およ
び焼結などを行った後、圧着加工の工程を経て製造され
る。このため、金属箔に貫通する孔を多数個設けること
は、強度低下をもたらし、前記の工程中に破断すること
がある。このような破断を解消するためには、箔の強度
低下に合わせて製造設備の改造などが必要となる。The electrode coated with the active material described above is
After the active material is applied to both surfaces of the metal foil, it is heated, dried, sintered, and the like, and then manufactured through a pressure bonding process. For this reason, providing a large number of holes penetrating through the metal foil causes a reduction in strength and may cause breakage during the above process. In order to eliminate such breakage, it is necessary to remodel the manufacturing equipment in accordance with the reduction in the strength of the foil.
【０００７】本発明は、多孔にしなくとも活物質と金属
との担持性に優れ、上記のような破断などの問題を生じ
ない二次電池集電体用金属箔を提供することにある。An object of the present invention is to provide a metal foil for a secondary battery current collector which is excellent in supporting properties of an active material and a metal even if it is not porous, and does not cause the above-mentioned problems such as breakage.
【０００８】[0008]
【課題を解決するための手段】本発明者らは、金属箔と
電極となる活物質との担持性に優れる金属箔について鋭
意研究した結果、金属箔に付与すべき性能として下記の
点を明らかにし、本発明を完成した。Means for Solving the Problems The inventors of the present invention have conducted intensive studies on metal foils having excellent supportability of a metal foil and an active material serving as an electrode, and as a result, the following points have been clarified as properties to be imparted to the metal foil. Thus, the present invention has been completed.
【０００９】電極は、活物質を金属箔に塗布、乾燥した
後、ロールなどで圧着加工を行って製造される。この圧
着工程で金属箔は、活物質の粒子に押圧されて塑性変形
を起こし、粒子を食い込ませ、密着力を高める。また、
圧着工程では、金属箔が複数の粒子で構成される凹凸に
よって曲げ変形しながら粒子を包み込み、密着力を高め
る。The electrode is manufactured by applying an active material to a metal foil, drying the applied material, and performing pressure bonding with a roll or the like. In this compression bonding step, the metal foil is pressed by the particles of the active material and undergoes plastic deformation, causing the particles to bite and increasing the adhesion. Also,
In the pressure bonding step, the metal foil wraps the particles while being bent and deformed by the unevenness composed of a plurality of particles, thereby increasing the adhesion.
【００１０】すなわち、電極の集電体となる金属箔に
は、厚さが薄く、軟らかく、ある程度の強度が必要であ
る。本発明は、金属箔の厚さと硬さを最適に規定するこ
とによってこれを実現した。That is, the metal foil serving as the current collector of the electrode needs to be thin, soft, and have some strength. The present invention has achieved this by optimally defining the thickness and hardness of the metal foil.
【００１１】本発明の要旨は、下記に示す二次電池集電
体用金属箔およびそれを製造する方法にある。The gist of the present invention resides in the following metal foil for a secondary battery current collector and a method for producing the same.
【００１２】電解析出法によって形成された金属箔であ
つて、厚さ（T）が8〜40μｍ、硬さ（H）がビッカース
硬さで40以上であり、かつ硬さ（H）と厚さ（T）の２倍
との和（H＋2T）が90〜250であることを特徴とする二次
電池集電体用金属箔。A metal foil formed by an electrolytic deposition method, having a thickness (T) of 8 to 40 μm, a hardness (H) of 40 or more as Vickers hardness, and a hardness (H) and a thickness A metal foil for a secondary battery current collector, wherein the sum (H + 2T) of twice the length (T) is 90 to 250.
【００１３】金属箔は、ニッケル箔であることが望まし
く、これらは軟化焼鈍することによって製造することが
できる。焼鈍炉は、連続炉であっても、バッチ炉であっ
てもよい。[0013] The metal foil is preferably a nickel foil, which can be produced by soft annealing. The annealing furnace may be a continuous furnace or a batch furnace.
【００１４】[0014]
【発明の実施の形態】本発明の二次電池集電体用金属箔
は、厚さが薄く、軟らかく、ある程度の強度を有するも
のである。BEST MODE FOR CARRYING OUT THE INVENTION The metal foil for a secondary battery current collector of the present invention has a small thickness, is soft, and has a certain strength.
【００１５】本発明の金属箔が電池用活物質と十分な密
着力を発揮するには、金属箔の厚さ（T）が8〜40μｍで
あり、硬さ（H）と厚さとの関係（H＋2T）が90〜250で
あればよい。In order for the metal foil of the present invention to exhibit sufficient adhesion to the active material for a battery, the thickness (T) of the metal foil is 8 to 40 μm, and the relationship between hardness (H) and thickness ( H + 2T) should be 90 to 250.
【００１６】金属箔の厚さ（T）が8μｍ未満では、電極
としたとき電気抵抗が大きくなり集電体として適さなく
なる。また、箔の製造時、または活物質の圧着工程で破
断する。厚さが40μｍを超えると、活物質の担持性が悪
くなる。厚さの好ましい範囲は10〜30μｍである。If the thickness (T) of the metal foil is less than 8 μm, the electrical resistance of the electrode when used as an electrode becomes large, and the electrode is not suitable as a current collector. Also, it breaks during the production of the foil or in the step of pressing the active material. If the thickness exceeds 40 μm, the supporting property of the active material deteriorates. The preferred range of the thickness is 10 to 30 μm.
【００１７】金属箔の硬さ（H）がビッカース硬さ（H
v）で40未満では、活物質の圧着工程で塑性変形が大き
くなり過ぎ、逆に活物質の密着力が低下する。The hardness (H) of the metal foil is Vickers hardness (H)
If the value of v) is less than 40, the plastic deformation becomes too large in the step of pressing the active material, and conversely, the adhesion of the active material decreases.
【００１８】（H＋2T）の値を90〜250とする理由：金属
箔の曲げ変形によって活物質を包み込むためには、厚さ
（T）が小さいほど良く、また硬さ（H）が低い程良い。
このためには、（H＋2T）の値を250以下にすれば良い。
しかし、90未満では活物質の圧着工程で形状不安定が発
生しやすく、活物質の担持性にも部分的に差が生じる。
電池の極板としての不良率が増大する。The reason for setting the value of (H + 2T) to 90 to 250: In order to wrap the active material by bending deformation of the metal foil, the smaller the thickness (T), the better the hardness (H). .
For this purpose, the value of (H + 2T) may be set to 250 or less.
However, when the ratio is less than 90, shape instability is likely to occur in the step of pressing the active material, and there is a partial difference in the supportability of the active material.
The defective rate as a battery electrode plate increases.
【００１９】金属箔の活物質の担持性は、箔の曲げ変形
による活物質の包み込みと活物質の金属箔への食い込み
によって定まる。包み込みは金属箔が薄いほど、また食
い込みは金属箔の硬さが低いほど効果的であり、良好な
担持性はそれらの和の上限規定で実現される。上限値25
0は、実験値である。The supporting property of the metal foil for the active material is determined by the wrapping of the active material due to the bending deformation of the foil and the biting of the active material into the metal foil. The wrapping is effective as the metal foil is thinner and the digging is effective as the hardness of the metal foil is lower, and good supportability is realized by the upper limit of the sum of them. Upper limit 25
0 is an experimental value.
【００２０】硬さ（H）が40未満、厚さ（T）が8μｍ未
満では、箔のハンドリング性が悪く、製造ラインでの通
板が非常に国難となる。また、硬さ（H）が40以上、厚
さ（T）が8μｍ以上であれば、通板は可能であるが、
（H＋2T）の値が90未満では、活物質の圧着工程で不具
合が生じる。すなわち、活物質の圧着時にラインの張力
によって片伸びなどの形状不安定が発生しやすくなり、
活物質の食い込みに部分的な差が生じる。その結果、活
物質の担持性にも良好な部分とそうでない部分が生じ、
電池の極板として使用する場合に不良率が高くなる。If the hardness (H) is less than 40 and the thickness (T) is less than 8 μm, the handleability of the foil is poor, and it becomes very difficult to pass a sheet through a production line. If the hardness (H) is 40 or more and the thickness (T) is 8 μm or more, threading is possible,
When the value of (H + 2T) is less than 90, a problem occurs in the active material pressing step. In other words, when the active material is pressed, shape instability such as one-sided stretching tends to occur due to line tension,
There is a partial difference in the penetration of the active material. As a result, a good portion and a poor portion also occur in the active material supportability,
When used as an electrode plate of a battery, the defective rate increases.
【００２１】上記の諸特性を満足すれば、金属箔の材質
はニッケル、銅、鉄、およびそれらの合金のいずれであ
ってもよい。また、それらの金属を積層させてもよい。As long as the above properties are satisfied, the material of the metal foil may be any of nickel, copper, iron and alloys thereof. Moreover, you may laminate | stack these metals.
【００２２】[0022]
【実施例】本例では、回転ドラム式電解析出装置を用
い、表１に示す金属箔を製造した。このときの電解液お
よび電解条件は下記のとおりとした。EXAMPLE In this example, metal foils shown in Table 1 were produced using a rotary drum type electrolytic deposition apparatus. The electrolytic solution and the electrolytic conditions at this time were as follows.
【００２３】[0023]
【表１】 [Table 1]
【００２４】(1) ニッケル金属箔 電解液 硫酸ニッケル 250 g/L 塩化ニッケル 45 g/L ほう酸 40 g/L pH 3.5 温度 50℃ 電流密度 80 A/dm２ (2) 鉄箔 電解液 硫酸第一鉄 250 g/L 硫酸アンモニウム 45 g/L pH 2.2 温度 50℃ 電流密度 10 A/dm２ (3) 銅箔 電解液 硫酸銅 200 g/L 硫酸 50 g/L 温度 35℃ 電流密度 40 A/dm２ (1) Nickel metal foil electrolyte Nickel sulfate 250 g / L Nickel chloride 45 g / L Boric acid 40 g / L pH 3.5 Temperature 50 ° C Current density 80 A / dm 2 (2) Iron foil electrolyte Sulfuric acid first Iron 250 g / L Ammonium sulfate 45 g / L pH 2.2 Temperature 50 ° C Current density 10 A / dm 2 (3) Copper foil Electrolyte Copper sulfate 200 g / L Sulfuric acid 50 g / L Temperature 35 ° C Current density 40 A / dm 2
【００２５】得られた金属箔の焼鈍は、水素還元炉（10
％H２＋N２）を用い、材料の昇温速度を10℃／分、保持
時間を10秒として表１に示す材料温度で加熱した後N２
ガスによる徐冷を施した。これは、連続焼鈍炉の条件を
模擬したものである。The obtained metal foil was annealed in a hydrogen reduction furnace (10
% H 2 + N 2 ), the material was heated at the material temperature shown in Table 1 at a temperature rising rate of 10 ° C./min and a holding time of 10 seconds, and then N 2
Slow cooling with gas was performed. This simulates the conditions of a continuous annealing furnace.
【００２６】活物質の担持性を評価するのに次に示す試
験を行った。幅50mm、長さ150mmの長方形の金属箔の両
面に活物質を塗布し、加熱、圧着して電極とした。活物
質の塗布量は、乾燥状態で両面当たり500μｍとした。
この電極を直径が1mmのステンレス鋼製ワイヤに巻き付
け、巻き戻しを行った。活物質の脱落量（剥離量）は、
電子天秤によって測定した。それらの試験結果を表１に
示す。The following tests were performed to evaluate the supportability of the active material. An active material was applied to both sides of a rectangular metal foil having a width of 50 mm and a length of 150 mm, and heated and pressed to form electrodes. The coating amount of the active material was 500 μm per both surfaces in a dry state.
This electrode was wound around a stainless steel wire having a diameter of 1 mm, and unwound. The amount of active material falling off (peeling amount)
It was measured by an electronic balance. Table 1 shows the test results.
【００２７】評価基準は、活物質剥離量が0〜0.5％以下
を◎、0.5％を超え〜1.0％以下を○、1.0％を超え〜3.0
％以下を△、3.0％超えを×とした。The evaluation criteria are as follows: 剥離: 0 to 0.5% or less, ○: more than 0.5% to 1.0%, ○: more than 1.0% to 3.0%
% Or less, and 3.0% or more as x.
【００２８】表１から明らかなように、発明例の番号１
から26までの金属箔は、厚さ（T）が8〜38μｍ、硬さ
（H）がビッカース硬さ（Hv）で60〜200、かつ硬さと厚
さの２倍との和（H＋2T）が91〜246の範囲にあり、活物
質の担持性はいずれも良好である。As is clear from Table 1, the invention example No. 1
Metal foils from to 26 have a thickness (T) of 8 to 38 µm, a hardness (H) of 60 to 200 in Vickers hardness (Hv), and the sum of hardness and twice the thickness (H + 2T) It is in the range of 91 to 246, and the supportability of the active material is all good.
【００２９】これに対し、比較例の番号27のNi箔は、厚
さ（T）が7μｍと薄く、硬さと厚さの２倍との和（H＋2
T）が68と小さいため、活物質の担持性に劣る。On the other hand, the Ni foil of No. 27 of the comparative example has a thin thickness (T) of 7 μm, and the sum of hardness and twice the thickness (H + 2)
Since T) is as small as 68, the supportability of the active material is poor.
【００３０】番号28および29のNi箔は、いずれも焼鈍温
度が850℃と高いため、硬さと厚さの２倍との和（H＋2
T）が70および88と小さい。このため、活物質の担持性
に劣る。Since the Ni foils of Nos. 28 and 29 both have an annealing temperature as high as 850 ° C., the sum of hardness and twice the thickness (H + 2)
T) is as small as 70 and 88. For this reason, the supportability of the active material is poor.
【００３１】番号30および31のNi箔は、焼鈍温度が450
℃および490℃と低いため、硬さと厚さの２倍との和（H
＋2T）がいずれも255と大きい。このため、活物質の担
持性に劣る。The Ni foils of Nos. 30 and 31 have an annealing temperature of 450
° C and 490 ° C, the sum of hardness and twice the thickness (H
+ 2T) is as large as 255. For this reason, the supportability of the active material is poor.
【００３２】番号32のNi箔は、厚さが50μｍと大きいた
め、硬さと厚さの２倍との和（H＋2T）が260と大きくな
り、活物質の担持性に劣る。Since the Ni foil of No. 32 has a large thickness of 50 μm, the sum of hardness and twice the thickness (H + 2T) is as large as 260, which is inferior in the active material supportability.
【００３３】番号33のFe箔は、厚さ（T）が7μｍと薄
く、しかも焼鈍温度が850℃と高いため、硬さと厚さの
２倍との和（H＋2T）が86と小さいため、活物質の担持
性に劣る。The Fe foil No. 33 has a thin thickness (T) of 7 μm and an annealing temperature as high as 850 ° C., and has a small sum of hardness and twice the thickness (H + 2T) of 86. Poor ability to carry substances.
【００３４】番号34のCu箔は、焼鈍温度が820℃と高い
ため、硬さ（H）がビッカース硬さ（Hv）で40と低く、
かつ硬さと厚さの２倍との和（H＋2T）が80と小さいた
め、活物質の担持性に劣る。The Cu foil No. 34 has a low hardness (H) of 40 as Vickers hardness (Hv) because the annealing temperature is as high as 820 ° C.
In addition, since the sum of hardness and twice the thickness (H + 2T) is as small as 80, the supportability of the active material is poor.
【００３５】[0035]
【発明の効果】本発明の金属箔は、厚さと硬さとの関係
で好ましい範囲に規定されいているので、電極の製造過
程で破断することなく、しかも活物質の担持性と電気伝
導性に優れている。これを二次電池集電材に用いれば、
電池性能を高めることができる。The metal foil of the present invention is defined in a preferable range in relation to the thickness and hardness, so that it does not break during the manufacturing process of the electrode, and has excellent supportability of the active material and excellent electrical conductivity. ing. If this is used for the secondary battery current collector,
Battery performance can be improved.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 塩田 俊明 兵庫県尼崎市扶桑町１番21号住友金属建材 株式会社内 (72)発明者 能見 亮一 兵庫県尼崎市扶桑町１番21号住友金属建材 株式会社内 (72)発明者 福井 国博 大阪府大阪市中央区北浜４丁目５番33号住 友金属工業株式会社内 (72)発明者 木本 雅也 大阪府大阪市中央区北浜４丁目５番33号住 友金属工業株式会社内 Ｆターム(参考） 5H017 AA02 AA03 BB01 BB16 CC01 EE04 HH00 HH03 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshiaki Shiota 1-121 Fuso-cho, Amagasaki-shi, Hyogo Sumitomo Metal Building Materials Co., Ltd. (72) Inventor Ryoichi Nomi 1-21 Fuso-cho, Amagasaki-shi, Hyogo Sumitomo Metal Building Materials Inside (72) Kunihiro Fukui 4-5-33 Kitahama, Chuo-ku, Osaka-shi, Osaka Prefecture Inside Sumitomo Metal Industries Co., Ltd. (72) Masaya Kimoto 4-5-33 Kitahama, Chuo-ku, Osaka, Osaka No. Sumitomo Metal Industries Co., Ltd. F-term (reference) 5H017 AA02 AA03 BB01 BB16 CC01 EE04 HH00 HH03
Claims (3)
つて、厚さ（T）が8〜40μｍ、硬さ（H）がビッカース
硬さで40以上であり、かつ硬さ（H）と厚さ（T）の２倍
との和（H＋2T）が90〜250であることを特徴とする二次
電池集電体用金属箔。1. A metal foil formed by an electrolytic deposition method, having a thickness (T) of 8 to 40 μm, a hardness (H) of 40 or more as Vickers hardness, and a hardness (H). A metal foil for a secondary battery current collector, wherein the sum (H + 2T) of the sum of the thickness and the thickness (T) is 90 to 250.
る請求項１に記載の二次電池集電体用金属箔。2. The metal foil for a secondary battery current collector according to claim 1, wherein the metal foil is a nickel foil.
化焼鈍することを特徴とする請求項１または２に記載の
二次電池集電体用金属箔の製造方法。3. The method for producing a metal foil for a secondary battery current collector according to claim 1, wherein the metal foil formed by the electrolytic deposition method is softened and annealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001075351A JP3744369B2 (en) | 2001-03-16 | 2001-03-16 | Nickel foil for nickel-hydrogen secondary battery current collector and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001075351A JP3744369B2 (en) | 2001-03-16 | 2001-03-16 | Nickel foil for nickel-hydrogen secondary battery current collector and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002279999A true JP2002279999A (en) | 2002-09-27 |
| JP3744369B2 JP3744369B2 (en) | 2006-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001075351A Expired - Fee Related JP3744369B2 (en) | 2001-03-16 | 2001-03-16 | Nickel foil for nickel-hydrogen secondary battery current collector and method for producing the same |
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| Country | Link |
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| JP (1) | JP3744369B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006134762A (en) * | 2004-11-08 | 2006-05-25 | Sony Corp | Secondary battery |
| KR100985606B1 (en) | 2007-05-24 | 2010-10-05 | 닛산 지도우샤 가부시키가이샤 | Current collector for nonaqueous solvent secondary battery, and electrode and battery, which use the current collector |
| EP2450476A1 (en) * | 2009-06-29 | 2012-05-09 | Hitachi Metals, Ltd. | Method for manufacturing aluminum foil |
-
2001
- 2001-03-16 JP JP2001075351A patent/JP3744369B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006134762A (en) * | 2004-11-08 | 2006-05-25 | Sony Corp | Secondary battery |
| KR100985606B1 (en) | 2007-05-24 | 2010-10-05 | 닛산 지도우샤 가부시키가이샤 | Current collector for nonaqueous solvent secondary battery, and electrode and battery, which use the current collector |
| US9017877B2 (en) | 2007-05-24 | 2015-04-28 | Nissan Motor Co., Ltd. | Current collector for nonaqueous solvent secondary battery, and electrode and battery, which use the current collector |
| EP2450476A1 (en) * | 2009-06-29 | 2012-05-09 | Hitachi Metals, Ltd. | Method for manufacturing aluminum foil |
| EP2450476A4 (en) * | 2009-06-29 | 2014-01-22 | Hitachi Metals Ltd | Method for manufacturing aluminum foil |
| US9219279B2 (en) | 2009-06-29 | 2015-12-22 | Hitachi Metals, Ltd. | Method for producing aluminum foil |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3744369B2 (en) | 2006-02-08 |
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