JPH11158652A - Production of electrode material for secondary battery - Google Patents
Production of electrode material for secondary batteryInfo
- Publication number
- JPH11158652A JPH11158652A JP9322702A JP32270297A JPH11158652A JP H11158652 A JPH11158652 A JP H11158652A JP 9322702 A JP9322702 A JP 9322702A JP 32270297 A JP32270297 A JP 32270297A JP H11158652 A JPH11158652 A JP H11158652A
- Authority
- JP
- Japan
- Prior art keywords
- copper foil
- treatment
- bath
- rust
- secondary battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Battery Electrode And Active Subsutance (AREA)
- Chemical Treatment Of Metals (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、二次電池の電極、
特に負極集電体として用いられる銅箔の製造方法に関
し、特にリチウムイオン二次電池用のそれの製造方法に
関する。[0001] The present invention relates to an electrode for a secondary battery,
In particular, the present invention relates to a method for producing a copper foil used as a negative electrode current collector, and particularly to a method for producing the same for a lithium ion secondary battery.
【０００２】[0002]
【従来の技術】近年、携帯電話、ビデオカメラ、ノート
型パソコン等のポータブル機器の普及に伴い、小型で高
容量の二次電池に対する需要が高まっている。現在、使
用量の多い二次電池はニッケル−カドミウム電池及びニ
ッケル−水素電池であるが、軽量でエネルギー密度の高
いリチウムイオン電池に対する需要は著しく、１９９６
年には二次電池の１／３を占めるほどである。2. Description of the Related Art In recent years, with the spread of portable devices such as mobile phones, video cameras, and notebook computers, demand for small-sized and high-capacity secondary batteries has been increasing. At present, secondary batteries that are frequently used are nickel-cadmium batteries and nickel-hydrogen batteries, but the demand for light-weight, high-energy-density lithium-ion batteries is remarkable.
It accounts for one-third of secondary batteries a year.
【０００３】リチウムイオン二次電池は、通常、ＬｉＣ
ｏＯ2 等のリチウムを含む化合物をアルミニウム箔上に
バインダーと共にコーティングしたものを正極にし、負
極にはリチウムを含まない炭素質材料（負極活物質）を
バインダーと共に銅箔上にコーティングしたものが使用
される。[0003] Lithium ion secondary batteries are usually LiC
A positive electrode is obtained by coating a compound containing lithium such as oO 2 on an aluminum foil with a binder, and a negative electrode is obtained by coating a carbonaceous material (anode active material) containing no lithium on a copper foil with a binder. You.
【０００４】前記の銅箔としては、鋳造にて製造された
銅の鋳塊に圧延処理を施して箔状にした「圧延銅箔」
と、硫酸銅を主成分とする溶液を電解してチタン等から
なる陰極ドラム上に銅を析出させ、これを連続的に引き
はがして製造する「電解銅箔」がある。[0004] As the above-mentioned copper foil, a rolled copper ingot produced by casting is subjected to a rolling treatment to form a rolled copper foil.
There is an “electrolytic copper foil” which is produced by electrolyzing a solution containing copper sulfate as a main component to precipitate copper on a cathode drum made of titanium or the like, and continuously peeling the copper.
【０００５】これらの銅箔は、その表面に防錆処理が施
された上で利用される。[0005] These copper foils are used after being subjected to a rust-preventive treatment.
【０００６】この防錆処理としては、ベンゾトリアゾー
ルに代表されるアゾール系誘導体を用いる有機防錆処理
と、無水クロム酸に代表されるクロム化合物系の溶液を
用いるクロメート処理が一般的に行われている。As the rust preventive treatment, an organic rust preventive treatment using an azole derivative represented by benzotriazole and a chromate treatment using a chromium compound-based solution represented by chromic anhydride are generally performed. I have.
【０００７】しかしながら、有機防錆処理を施したもの
は、負極活物質のコーティング工程（先ず、一方の面に
負極活物質をバインダーと共に塗工し、乾燥させた上
で、もう一方の面に同様の操作を行う）において、一回
目の乾燥操作時に乾燥雰囲気に暴露している面が酸化変
色を起こし、該面銅箔と負極活物質との密着性が低下
し、極端な場合、同工程中で負極活物質が剥離するとい
うトラブルを引き起こす。However, the one subjected to the organic rust-preventive treatment is subjected to a negative electrode active material coating step (a negative electrode active material is first coated on one surface together with a binder, dried, and then coated on the other surface. In the first drying operation, the surface exposed to the drying atmosphere undergoes oxidative discoloration, and the adhesion between the surface copper foil and the negative electrode active material decreases. This causes a problem that the negative electrode active material is peeled off.
【０００８】また、有機防錆処理を施したものは、一般
に防錆力が弱いので実用的な防錆力を得るためには防錆
皮膜を厚くする必要があるが、電池に組み込んだ後で電
解液の浸透により該皮膜の密着性が徐々に低下し、充放
電サイクルを繰り返していると突然電圧が低下する、と
いう問題を引き起こすこともある。[0008] In addition, those which have been subjected to an organic rust preventive treatment generally have a low rust preventive force, and therefore, it is necessary to thicken the rust preventive film in order to obtain a practical rust preventive force. In some cases, the adhesion of the film gradually decreases due to the permeation of the electrolytic solution, and the voltage may suddenly decrease when the charge and discharge cycle is repeated.
【０００９】一方、クロメート処理は、一般に、銅箔を
無水クロム酸の酸性溶液に浸漬したり、該浴中で陰極電
解処理を行うことによってなされている。この処理にて
得られる防錆皮膜は防錆力に優れていると共に負極活物
質のコーティング工程にて酸化変色を起こさない、とい
う利点を有しているが、該活物質との密着性は満足し得
るものではない（同工程直後で負極活物質が剥離すると
いうトラブルがままある）。On the other hand, the chromate treatment is generally performed by immersing a copper foil in an acidic solution of chromic anhydride or by performing a cathodic electrolytic treatment in the bath. The rust preventive film obtained by this treatment has the advantage that it has excellent rust preventive power and does not cause oxidative discoloration in the coating process of the negative electrode active material, but the adhesion with the active material is satisfactory. (There is still a problem that the negative electrode active material peels off immediately after the step).
【００１０】[0010]
【発明が解決しようとする課題】本発明は、従来の技術
の課題を解決するためになされたものであって、良好な
防錆力を有すると共に電解液の共存下でも所要の密着性
を維持し得る、ひいては長期間の充放電サイクルを可能
にする二次電池の負極集電体を提供することを目的とす
る。SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art, and has a good rust-preventing ability and maintains a required adhesion even in the presence of an electrolyte. It is an object of the present invention to provide a negative electrode current collector for a secondary battery that can perform a long-term charge / discharge cycle.
【００１１】[0011]
【課題を解決するための手段】本発明は、二次電池の電
極に用いられる銅箔の製造方法であって、該銅箔表面の
防錆処理がアルカリ性のクロメート浴にて行われること
を特徴とする。SUMMARY OF THE INVENTION The present invention relates to a method for producing a copper foil used for an electrode of a secondary battery, characterized in that the surface of the copper foil is rust-proofed in an alkaline chromate bath. And
【００１２】ここで、前記のクロメート浴のｐＨは８〜
１３であることが好ましい。該浴のpHが８未満では処理
後の銅箔表面の液弾き（定義は後記の実施例の記載参
照）が顕著になってしまうし、一方、pHが１３を越える
と処理後の銅箔表面にアルカリ残留痕が著しく多くな
り、また経時において吸湿が進行し酸化変色や錆発生を
生ずる原因となるからである。The pH of the chromate bath is 8 to
It is preferably 13. If the pH of the bath is less than 8, the repelling of the copper foil surface after the treatment (for the definition, refer to the description in the following Examples) becomes remarkable, while if the pH exceeds 13, the surface of the copper foil after the treatment becomes large. This is because the residual alkali marks are significantly increased, and the moisture absorption progresses with the lapse of time, causing oxidation discoloration and rust generation.
【００１３】また、前記のクロメート浴の浴温は１５〜
５０℃であることが好ましい。該浴の浴温が１５℃未満
では、特に、浸漬法を適用した場合に所定のクロム下限
量を得ることができない場合があるし、一方、該浴温が
５０℃を越えると所定のクロム上限量を越えてしまう場
合があるからである。The bath temperature of the chromate bath is 15 to
Preferably it is 50 ° C. When the bath temperature of the bath is lower than 15 ° C., in particular, it may not be possible to obtain a predetermined lower limit of chromium when the immersion method is applied. On the other hand, when the bath temperature exceeds 50 ° C. This is because the limit may be exceeded.
【００１４】更に、前記の防錆処理はクロメート浴へ被
処理銅箔を３〜３０秒間浸漬又は該浴中で陰極電解処理
することにより行われることが好ましい。ここで、浸漬
法は、簡易な設備で処理ができるし、一方、陰極電解処
理は浸漬法に比し設備的には大掛かりになるが、得られ
る銅箔の示す特性が相対的に優れているので、より高い
特性が所望されているか否かに応じて適宜選択すればよ
い。尚、規定された該浴への浸漬時間又は電解処理時間
は、３秒未満では所定のクロム下限量を得ることができ
ない場合があるし、一方、３０秒を越えると所定のクロ
ム上限量を越えてしまう場合があるからである。Further, the rust prevention treatment is preferably carried out by immersing the copper foil to be treated in a chromate bath for 3 to 30 seconds or by performing cathodic electrolysis in the bath. Here, the immersion method can be processed with simple equipment, while the cathodic electrolysis treatment is larger in equipment than the immersion method, but the properties of the obtained copper foil are relatively excellent. Therefore, it may be appropriately selected depending on whether higher characteristics are desired. If the specified immersion time or electrolytic treatment time is less than 3 seconds, the predetermined lower limit of chromium may not be obtained, while if it exceeds 30 seconds, the predetermined upper limit of chromium may be exceeded. This is because there is a case that
【００１５】更に又、前記の防錆処理によって形成され
る皮膜の厚みは、０．００５〜０．０３２mg/dm2のクロ
ムを含有するものであることが好ましい。該皮膜の厚み
が０．００５mg−Ｃｒ/dm2未満では負極活物質の密着性
は問題ないが防錆力が劣り、更に負極活物質のコーティ
ング工程（乾燥温度：１６０℃前後）での酸化変色を起
こすし、０．０３２mg−Ｃｒ/dm2を越えると防錆力は問
題ないが負極活物質の密着性が低下する傾向を示すから
である。Further, it is preferable that the thickness of the film formed by the above rust prevention treatment contains 0.005 to 0.032 mg / dm 2 of chromium. When the thickness of the film is less than 0.005 mg-Cr / dm 2 , there is no problem in the adhesion of the negative electrode active material, but the rust prevention is inferior, and the discoloration due to oxidation in the coating process of the negative electrode active material (drying temperature: around 160 ° C.) If the content exceeds 0.032 mg-Cr / dm 2 , there is no problem in rust prevention, but the adhesiveness of the negative electrode active material tends to decrease.
【００１６】尚、前記の防錆処理を受ける銅箔は電解銅
箔であってもよいし、また圧延銅箔であってもよい。本
発明の方法では、銅箔の種類を選ばないからである。The copper foil subjected to the rust-preventive treatment may be an electrolytic copper foil or a rolled copper foil. This is because in the method of the present invention, the type of copper foil is not selected.
【００１７】[0017]
【発明の実施の形態】以下に、本発明を実施例に基づい
て更に詳しく説明する。但し、本発明はこれらに限定さ
れるものではない。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments. However, the present invention is not limited to these.
【００１８】実施例１ 電解銅箔（厚さ：１０μm ；古河サーキットフォイル
（株）製）を無水クロム酸のアルカリ溶液（無水クロム
酸：６g/l ；水酸化ナトリウム：１５g/l ；pH：１２．
５；浴温：２５℃）に５秒間浸漬し、該銅箔の両面に防
錆皮膜を形成させた。該皮膜の厚みは、光沢面側（陰極
ドラム側）が０．０２４mg−Ｃｒ/dm2、粗面側（電解浴
側）が０．０１８mg−Ｃｒ/dm2であった。 Example 1 An electrolytic copper foil (thickness: 10 μm; manufactured by Furukawa Circuit Foil Co., Ltd.) was treated with an alkali solution of chromic anhydride (chromic anhydride: 6 g / l; sodium hydroxide: 15 g / l; pH: 12). .
5; bath temperature: 25 ° C.) for 5 seconds to form a rust preventive film on both surfaces of the copper foil. The thickness of said coating is glossy surface side (cathode drum side) 0.024mg-Cr / dm 2, the matte side (electrolytic bath side) was 0.018mg-Cr / dm 2.
【００１９】得られた防錆皮膜付き銅箔の特性を下記の
項目についてそれぞれ評価した。The properties of the obtained copper foil with a rust-preventive film were evaluated for the following items.
【００２０】（１）防錆力 恒温恒湿槽（温度：４０℃；相対湿度：９０％に設定）
の中に該銅箔を入れ、酸化変色及び錆の発生程度の経時
変化を目視観察した。評価は、変色が無く最も良好なも
のをＡとし、酸化変色の程度に応じてＡ＞Ｂ＞Ｃ＞Ｄ＞
Ｅの順に評価付けした。(1) Rust prevention power Constant temperature and humidity chamber (temperature: 40 ° C .; relative humidity: 90%)
The copper foil was put into the sample, and the time-dependent changes in the degree of oxidative discoloration and rust were visually observed. The evaluation was A, which was the most favorable without discoloration, and A>B>C>D> according to the degree of oxidative discoloration.
The evaluation was made in the order of E.
【００２１】（２）液弾き性 該銅箔表面に１−メチル−２−ピロリドン溶液を綿棒に
て塗布し、液弾きの度合いを目視観察した。液弾きがま
ったくない状態（該銅箔表面の濡れ性が最も良好なこと
を示す）をＡとし、弾きの程度に応じてＡ＞Ｂ（若干弾
きあり）＞Ｃ（弾きあり）＞Ｄ（弾き顕著）の順に評価
付けした。(2) Liquid repellency A 1-methyl-2-pyrrolidone solution was applied to the surface of the copper foil with a cotton swab, and the degree of liquid repellency was visually observed. A state where there is no liquid repelling (indicating that the wettability of the copper foil surface is the best) is A, and according to the degree of repelling, A> B (slightly repelling)> C (with repelling)> D (flipping) Remarkable).
【００２２】（３）密着力 カーボン粒子（Ｄ50＝２８μm)のペースト（バインダー
としてポリフッ化ビニリデンを、溶剤として１−メチル
−２−ピロリドン溶液（濃度：９９wt％以上）をそれぞ
れ用いた。配合比はカーボン：バインダー：溶剤＝４．
５ｇ：０．５ｇ：５．０mlである）を該銅箔の表面に均
一にコーティングし、加圧し、乾燥させた（カーボン含
有層の厚み：４０〜５０μm)。該カーボン含有層の表面
に鋭利なナイフにて１mm間隔で縦横に碁盤目状の切り込
みを入れ、その上にポリエステルテープを指先の腹部を
適度な圧で押しつけることで密着させ、該テープを引き
はがす際に該テープに該カーボン含有層の剥離付着物が
無いものをＡとし、付着の程度に応じてＡ＞Ｂ＞Ｃ＞Ｄ
＞Ｅの順に評価付けした。(3) Adhesive force A paste of carbon particles (D 50 = 28 μm) (polyvinylidene fluoride as a binder, and a 1-methyl-2-pyrrolidone solution (concentration: 99 wt% or more) as a solvent was used. Is carbon: binder: solvent = 4.
5 g: 0.5 g: 5.0 ml) was uniformly coated on the surface of the copper foil, pressed and dried (thickness of carbon-containing layer: 40 to 50 μm). Make a grid-shaped cut at 1 mm intervals on the surface of the carbon-containing layer with a sharp knife at intervals of 1 mm, and adhere a polyester tape on the cut by pressing the abdomen of the fingertip with an appropriate pressure, and peel off the tape. At this time, a tape having no carbon material-laden adhering matter on the tape is designated as A, and A>B>C> D according to the degree of adhesion.
> E.
【００２３】（４）酸化変色耐性 オーブン（温度：１４０℃，１６０℃及び１８０℃に設
定）中で１０分間加熱した後取り出した該銅箔の表面の
酸化程度を目視観察した。酸化変色を起こさなかったも
のをＡとし、変色の程度に応じてＡ＞Ｂ＞Ｃ＞Ｄ＞Ｅの
順に評価付けした。(4) Resistance to Oxidation Discoloration After heating in an oven (temperature: set at 140 ° C., 160 ° C. and 180 ° C.) for 10 minutes, the degree of oxidation of the surface of the copper foil taken out was visually observed. Samples that did not undergo oxidative discoloration were designated as A, and were evaluated in the order of A>B>C>D> E according to the degree of discoloration.
【００２４】結果を表１に示す。The results are shown in Table 1.
【００２５】実施例２ 浸漬法に代え陰極電解処理法（陰極：被処理銅箔、対極
陽極：酸化イリジウム被覆チタン板、陰極電解電流密
度：０．３A/dm2 、処理時間：３．５秒）を採用し、処
理後の該銅箔表面を水洗した以外、実施例１と同様にし
てクロメート防錆処理を施した銅箔を作製し、実施例１
と同様の特性評価を行った。結果を表１に示す。尚、得
られた皮膜の厚みは、光沢面側（陰極ドラム側）が０．
０２２mg−Ｃｒ/dm2、粗面側（電解浴側）が０．０２０
mg−Ｃｒ/dm2であった。 Example 2 A cathodic electrolysis method (cathode: copper foil to be treated, counter electrode: iridium oxide-coated titanium plate, cathodic electrolysis current density: 0.3 A / dm 2 , treatment time: 3.5 seconds instead of the dipping method) ), And a copper foil subjected to chromate rust prevention treatment was prepared in the same manner as in Example 1 except that the surface of the copper foil after the treatment was washed with water.
The same characteristic evaluation was performed. Table 1 shows the results. Incidentally, the thickness of the obtained film was 0.1 on the glossy side (cathode drum side).
022 mg-Cr / dm 2 , 0.020 on the rough side (electrolytic bath side)
It was a mg-Cr / dm 2.
【００２６】比較例１ クロメート処理浴を酸性浴（無水クロム酸：３．０g/l
；pH：１．７；浴温：２５℃）とした以外、実施例１
と同様にしてクロメート防錆処理を施した銅箔を作製
し、実施例と同様の特性評価を行った。結果を表１に示
す。 Comparative Example 1 A chromate treatment bath was replaced with an acidic bath (chromic anhydride: 3.0 g / l).
Example 1 except that pH: 1.7; bath temperature: 25 ° C.).
A copper foil subjected to chromate rust prevention treatment was prepared in the same manner as described above, and the same property evaluation as in the example was performed. Table 1 shows the results.
【００２７】比較例２ クロメート処理浴をベンゾトリアゾール浴（ベンゾトリ
アゾール：２５０ppm)とした以外、実施例１と同様にし
て有機防錆処理を施した銅箔を作製し、実施例と同様の
特性評価を行った。結果を表１に示す。 Comparative Example 2 A copper foil subjected to an organic rust preventive treatment was prepared in the same manner as in Example 1 except that a benzotriazole bath (benzotriazole: 250 ppm) was used as a chromate treatment bath, and the same characteristic evaluation as in the example was performed. Was done. Table 1 shows the results.
【００２８】比較例３ クロメート処理浴を比較例１のそれとした以外、実施例
２と同様にしてクロメート防錆処理を施した銅箔を作製
し、実施例と同様の特性評価を行った。結果を表１に示
す。 Comparative Example 3 A copper foil subjected to chromate rust prevention treatment was produced in the same manner as in Example 2 except that the chromate treatment bath was changed to that of Comparative Example 1, and the same property evaluation as in the example was performed. Table 1 shows the results.
【００２９】[0029]
【表１】 [Table 1]
【００３０】[0030]
【発明の効果】上記の通り、本発明の方法によれば、優
れた防錆力を有すると共に負極活物質の長期密着性を備
えた二次電池用負極集電体材料を提供することができる
ので、充放電の繰り返しストレスによっても放電容量の
低下が少ない二次電池を提供することができる。As described above, according to the method of the present invention, it is possible to provide a negative electrode current collector material for a secondary battery having excellent rust prevention and long-term adhesion of a negative electrode active material. Therefore, it is possible to provide a secondary battery in which the discharge capacity is less reduced even by the repeated stress of charge and discharge.
Claims (6)
方法であって、該銅箔表面の防錆処理がアルカリ性のク
ロメート浴にて行われることを特徴とする方法。1. A method for producing a copper foil used for an electrode of a secondary battery, wherein the rust-proofing treatment of the surface of the copper foil is performed in an alkaline chromate bath.
ある請求項１に記載の方法。2. The method according to claim 1, wherein the pH of the chromate bath is 8-13.
℃である請求項２に記載の方法。3. The bath temperature of the chromate bath is 15 to 50.
3. The method of claim 2, wherein the temperature is ° C.
銅箔を３〜３０秒間浸漬又は該浴中で陰極電解処理をす
ることにより行われる請求項２又は３に記載の方法。4. The method according to claim 2, wherein the rust prevention treatment is carried out by immersing the copper foil to be treated in a chromate bath for 3 to 30 seconds or performing a cathodic electrolysis treatment in the bath.
が０．００５〜０．０３２mg/dm2のクロムを含有するも
のである請求項１〜４のいずれか１項に記載の方法。5. The method according to claim 1, wherein the coating formed by the rust prevention treatment contains 0.005 to 0.032 mg / dm 2 of chromium.
又は圧延銅箔である請求項５に記載の方法。6. The method according to claim 5, wherein the copper foil subjected to the rust prevention treatment is an electrolytic copper foil or a rolled copper foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9322702A JPH11158652A (en) | 1997-11-25 | 1997-11-25 | Production of electrode material for secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9322702A JPH11158652A (en) | 1997-11-25 | 1997-11-25 | Production of electrode material for secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11158652A true JPH11158652A (en) | 1999-06-15 |
Family
ID=18146674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9322702A Pending JPH11158652A (en) | 1997-11-25 | 1997-11-25 | Production of electrode material for secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11158652A (en) |
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| JPH11273683A (en) * | 1998-03-19 | 1999-10-08 | Furukawa Electric Co Ltd:The | Copper foil for negative electrode current collector of nonaqueous solvent secondary battery and its manufacture |
| US6743369B2 (en) | 2000-12-22 | 2004-06-01 | Sanyo Electric Co., Ltd. | Method for manufacturing electrode for secondary battery |
| WO2008132987A1 (en) * | 2007-04-20 | 2008-11-06 | Nippon Mining & Metals Co., Ltd. | Electrolytic copper foil for lithium rechargeable battery and process for producing the copper foil |
| JP2009068042A (en) * | 2007-09-11 | 2009-04-02 | Furukawa Circuit Foil Kk | Copper foil having excellent ultrasonic weldability, and surface treatment method therefor |
| JP2010192459A (en) * | 2010-04-28 | 2010-09-02 | Hitachi Maxell Ltd | Nonaqueous secondary battery |
| JPWO2012002418A1 (en) * | 2010-06-30 | 2013-08-29 | 三井金属鉱業株式会社 | Method for producing copper foil for negative electrode current collector |
| TWI651421B (en) * | 2015-11-09 | 2019-02-21 | 南韓商Ｋｃｆ科技有限公司 | Electrolytic copper foil, electrode comprising the same, secondary battery comprising the same, and method for manufacturing the same |
| JP2020113485A (en) * | 2019-01-15 | 2020-07-27 | トヨタ自動車株式会社 | Anode |
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-
1997
- 1997-11-25 JP JP9322702A patent/JPH11158652A/en active Pending
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|---|---|---|---|---|
| JPH11273683A (en) * | 1998-03-19 | 1999-10-08 | Furukawa Electric Co Ltd:The | Copper foil for negative electrode current collector of nonaqueous solvent secondary battery and its manufacture |
| US6743369B2 (en) | 2000-12-22 | 2004-06-01 | Sanyo Electric Co., Ltd. | Method for manufacturing electrode for secondary battery |
| JP5351012B2 (en) * | 2007-04-20 | 2013-11-27 | Ｊｘ日鉱日石金属株式会社 | Electrolytic copper foil for lithium secondary battery and method for producing the copper foil |
| WO2008132987A1 (en) * | 2007-04-20 | 2008-11-06 | Nippon Mining & Metals Co., Ltd. | Electrolytic copper foil for lithium rechargeable battery and process for producing the copper foil |
| KR101108911B1 (en) | 2007-04-20 | 2012-01-31 | 제이엑스 닛코 닛세키 킨조쿠 가부시키가이샤 | Electrolytic copper foil for lithium rechargeable battery and process for producing the copper foil |
| TWI381071B (en) * | 2007-04-20 | 2013-01-01 | Jx Nippon Mining & Metals Corp | Electrolytic copper foil for lithium secondary battery and method for manufacturing the same |
| JP2009068042A (en) * | 2007-09-11 | 2009-04-02 | Furukawa Circuit Foil Kk | Copper foil having excellent ultrasonic weldability, and surface treatment method therefor |
| JP2010192459A (en) * | 2010-04-28 | 2010-09-02 | Hitachi Maxell Ltd | Nonaqueous secondary battery |
| JPWO2012002418A1 (en) * | 2010-06-30 | 2013-08-29 | 三井金属鉱業株式会社 | Method for producing copper foil for negative electrode current collector |
| JP5898616B2 (en) * | 2010-06-30 | 2016-04-06 | 三井金属鉱業株式会社 | Method for producing copper foil for negative electrode current collector |
| TWI651421B (en) * | 2015-11-09 | 2019-02-21 | 南韓商Ｋｃｆ科技有限公司 | Electrolytic copper foil, electrode comprising the same, secondary battery comprising the same, and method for manufacturing the same |
| JP2019065400A (en) * | 2015-11-09 | 2019-04-25 | ケイシーエフ テクノロジース カンパニー リミテッド | Electrolytic copper foil, electrode containing the same, secondary battery containing the same, and method for producing the same |
| US11355757B2 (en) | 2015-11-09 | 2022-06-07 | Sk Nexilis Co., Ltd. | Electrolytic copper foil, electrode comprising the same, secondary battery comprising the same, and method for manufacturing the same |
| JP2020113485A (en) * | 2019-01-15 | 2020-07-27 | トヨタ自動車株式会社 | Anode |
| US11271213B2 (en) | 2019-01-15 | 2022-03-08 | Toyota Jidosha Kabushiki Kaisha | Negative electrode |
| KR20210047445A (en) * | 2019-10-22 | 2021-04-30 | 일진머티리얼즈 주식회사 | Electrolytic copper foil for graphene and method for manufacturing thereof |
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