JP2000268826A - Copper material for negative electrode collector of li ion battery, and li ion battery - Google Patents
Copper material for negative electrode collector of li ion battery, and li ion batteryInfo
- Publication number
- JP2000268826A JP2000268826A JP11074908A JP7490899A JP2000268826A JP 2000268826 A JP2000268826 A JP 2000268826A JP 11074908 A JP11074908 A JP 11074908A JP 7490899 A JP7490899 A JP 7490899A JP 2000268826 A JP2000268826 A JP 2000268826A
- Authority
- JP
- Japan
- Prior art keywords
- negative electrode
- ion battery
- carbon layer
- copper foil
- current collector
- 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
- Cell Electrode Carriers And Collectors (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、Ｌｉイオン電池の
負極集電体用銅材およびＬｉイオン電池に関し、特に、
カーボン層との密着性に優れたＬｉイオン電池の負極集
電体用銅材とこれを使用したＬｉイオン電池に関する。The present invention relates to a copper material for a negative electrode current collector of a Li-ion battery and a Li-ion battery.
The present invention relates to a copper material for a negative electrode current collector of a Li-ion battery having excellent adhesion to a carbon layer, and a Li-ion battery using the same.
【０００２】[0002]
【従来の技術】単位体積および単位重量当たりのエネル
ギー密度において、Ｌｉイオン電池は、他のたとえばＮ
ｉ‐Ｃｄ電池、ＮｉＭＨ電池等に比べて高い性能を有し
ており、小型・軽量化が進む携帯用情報機器の電源（二
次電池）としての需要の伸びが期待されている。2. Description of the Related Art In terms of energy density per unit volume and unit weight, a Li-ion battery has other properties, such as N 2
It has higher performance than i-Cd batteries, NiMH batteries, and the like, and is expected to grow in demand as a power source (secondary battery) for portable information devices that are becoming smaller and lighter.
【０００３】図１にＬｉイオン電池の概要を示す。Ｌｉ
イオン電池は、正極集電体としてのアルミニウム箔１に
正極としてのコバルト酸リチウム（ＬｉＣｏＯ2 ）２を
形成し、負極集電体としての銅箔３に負極としての黒鉛
等のカーボン層４を形成し、正極２と負極４の間にセパ
レータ５を位置させて円筒形に巻き、これらを有機電解
液６に接触させた構成を有する。FIG. 1 shows an outline of a Li-ion battery. Li
In the ion battery, a lithium cobalt oxide (LiCoO 2 ) 2 as a positive electrode is formed on an aluminum foil 1 as a positive electrode current collector, and a carbon layer 4 such as graphite as a negative electrode is formed on a copper foil 3 as a negative electrode current collector. Then, the separator 5 is positioned between the positive electrode 2 and the negative electrode 4 and wound into a cylindrical shape, and these are brought into contact with the organic electrolyte 6.
【０００４】Ｌｉイオン電池の充電と放電は、以下のよ
うにして行われる。即ち、充電は、スイッチＳが端子Ｔ
1 にオンしたときに行われ、負極においてＬｉとＣが、
黒鉛層間に原子や原子団をドープした層間化合物ＧＩＣ
（Ｇｒａｐｈｉｔｅ Ｉｎｔｅｒｃａｌａｔｉｏｎ Ｃ
ｏｍｐｏｕｎｄ。このＧＩＣの理論組成はＬｉＣ6 に相
当）を作ることで行われる。一方、放電は、スイッチＳ
が端子Ｔ2 にオンしたときに行われ、黒鉛の負極からＬ
ｉが放出され、これが正極に取り込まれてＬｉＣｏＯ2
が形成されることによって行われる。図２（ａ）、
（ｂ）はＬｉＣ6 の構造を示す。[0004] Charging and discharging of a Li-ion battery are performed as follows. That is, when the switch S is connected to the terminal T
This is performed when the power is turned on to 1. At the negative electrode, Li and C
Interlayer compound GIC doped with atoms and atomic groups between graphite layers
(Graphite Intercalation C
ompound. The theoretical composition of this GIC is equivalent to LiC 6 ). On the other hand, the discharge
There occurs when turned on to the terminal T 2, L from the negative electrode graphite
i is released, and this is taken into the positive electrode and LiCoO 2
Is formed. FIG. 2 (a),
(B) shows the structure of LiC 6 .
【０００５】負極集電体を構成する銅箔３としては、厚
さが１０μｍ程度のものが使用され、これには、肉厚の
素条から圧延加工された圧延銅箔と、銅イオンを含む電
解液から金属銅を析出させて所定の厚さの箔状体とした
電解銅箔が使用されている。The copper foil 3 constituting the negative electrode current collector has a thickness of about 10 μm, and includes a rolled copper foil rolled from a thick strip and copper ions. 2. Description of the Related Art Electrolytic copper foils are used in which metallic copper is precipitated from an electrolytic solution to form a foil having a predetermined thickness.
【０００６】これらの銅箔は、前者は表面が不清浄で強
度が高く、後者は表面が清浄で強度が弱いことによって
特徴づけられる。即ち、圧延銅箔の場合には、圧延加工
工程において加工油が不可欠となることから、表面に加
工油が付着して不清浄であり、これに対し後者の電解銅
箔は、加工油の使用を一切必要としないことから清浄な
表面状態を呈している。[0006] These copper foils are characterized by the former having an unclean surface and high strength, and the latter having a clean surface and low strength. That is, in the case of rolled copper foil, since the processing oil is indispensable in the rolling process, the processing oil adheres to the surface and is unclean. In contrast, the latter electrolytic copper foil uses the processing oil. Since it does not require any surface, a clean surface state is exhibited.
【０００７】しかし、機械的強度の面においては逆の評
価となり、繰り返しの圧延加工によって製造される圧延
銅箔が電解銅箔よりも優れている。いずれの銅箔も、こ
れらの特質に対する個別配慮のもとに負極集電体用銅材
の好適な構成材として使用されている。[0007] However, the mechanical strength is reversed, and the rolled copper foil produced by repeated rolling is superior to the electrolytic copper foil. Any of the copper foils is used as a suitable constituent material of the copper material for the negative electrode current collector in consideration of these characteristics individually.
【０００８】負極を構成するカーボン層４は、平均粒径
が１０数μｍ程度のカーボン粉、人造黒鉛、天然黒鉛、
あるいはコークス等をバインダーとともに溶剤に分散
し、スラリー化した液を塗布した後、これを乾燥するこ
とによって形成され、１００μｍ程度の厚さに形成され
る。通常、バインダーとしてはＰＶｄＦ（ポリ弗化ビニ
リデン）が使用され、分散液剤としてはＮＭＰ（Ｎ−メ
チル−２−ピロリドン）が使用される。The carbon layer 4 constituting the negative electrode has a carbon powder having an average particle size of about 10 μm, artificial graphite, natural graphite,
Alternatively, it is formed by dispersing coke and the like together with a binder in a solvent, applying a slurried liquid, and then drying the slurried liquid to a thickness of about 100 μm. Usually, PVdF (polyvinylidene fluoride) is used as the binder, and NMP (N-methyl-2-pyrrolidone) is used as the dispersion agent.
【０００９】以上のように構成されるＬｉイオン電池の
重要事項として、負極における銅箔３とカーボン層４の
密着性が挙げられる。これら両者の密着性は、充放電時
の負極からのカーボンの脱落とこれを原因とする電極間
の短絡、電池容量の低下、あるいはサイクル特性の低下
等を防止するうえにおいて重要であり、電池性能を大き
く左右する。An important matter of the Li-ion battery configured as described above is the adhesion between the copper foil 3 and the carbon layer 4 in the negative electrode. The adhesion between the two is important in preventing carbon from dropping from the negative electrode during charging and discharging and preventing short-circuiting between electrodes due to this, reduction in battery capacity, reduction in cycle characteristics, etc. Greatly influences
【００１０】負極集電体用銅材とカーボン層の密着性を
向上させる手段として、たとえば、負極集電体を構成す
る銅箔の表面を電解処理によって粗化する方法、あるい
はカーボンスラリー中のバインダーの割合を多くする方
法などが提案されている。Means for improving the adhesion between the copper material for the negative electrode current collector and the carbon layer include, for example, a method of roughening the surface of a copper foil constituting the negative electrode current collector by electrolytic treatment, or a method of forming a binder in a carbon slurry. A method of increasing the ratio has been proposed.
【００１１】[0011]
【発明が解決しようとする課題】しかし、このような従
来の対策によると、前者の電解処理による粗化の場合、
粗化の度合がμｍオーダー以下と極小であるのに比べ、
カーボン粒子は１０数μｍと格段に大きく、従って、こ
れらの組み合わせによってカーボン粒子を銅箔の表面に
固定することは困難である。また、後者の方法にして
も、実際にこれを行った結果によれば、カーボン粒子間
の密着性の向上には効果があるが、銅箔とカーボン層の
密着性には影響が認められない。However, according to such conventional measures, in the case of roughening by the former electrolytic treatment,
The degree of roughening is extremely small, on the order of μm or less,
The carbon particles are much larger than 10 μm, and it is therefore difficult to fix the carbon particles on the surface of the copper foil by a combination of these. Also, even in the latter method, according to the result of actually performing this, there is an effect on improving the adhesion between the carbon particles, but no effect is observed on the adhesion between the copper foil and the carbon layer. .
【００１２】従って、本発明の目的は、カーボン層との
密着性を向上させたＬｉイオン電池の負極集電体用銅材
とこれを使用したＬｉイオン電池を提供することにあ
る。Accordingly, it is an object of the present invention to provide a copper material for a negative electrode current collector of a Li-ion battery having improved adhesion to a carbon layer, and a Li-ion battery using the same.
【００１３】[0013]
【課題を解決するための手段】本発明は、上記の目的を
達成するため、銅箔から構成されるＬｉイオン電池の負
極集電体用銅材において、前記銅箔は、その表面に凹部
または凸部、あるいは凹部および凸部を有することを特
徴とするＬｉイオン電池の負極集電体用銅材を提供する
ものである。According to the present invention, there is provided a copper material for a negative electrode current collector of a Li-ion battery comprising a copper foil, wherein the copper foil has a concave portion or a concave portion on its surface. An object of the present invention is to provide a copper material for a negative electrode current collector of a Li-ion battery, having a convex portion, or a concave portion and a convex portion.
【００１４】また、本発明は、上記の目的を達成するた
め、集電体用銅材の表面にカーボン層を形成した負極
と、正極と、前記負極および正極の間に位置させられた
セパレータと、前記負極、正極およびセパレータと接触
させられた有機電解液から構成されるＬｉイオン電池に
おいて、前記集電体用銅材は、凹部または凸部、あるい
は凹部および凸部を表面に有する銅箔によって構成され
ることを特徴とするＬｉイオン電池を提供するものであ
る。In order to achieve the above object, the present invention provides a negative electrode having a carbon layer formed on a surface of a copper material for a current collector, a positive electrode, and a separator positioned between the negative electrode and the positive electrode. In the Li-ion battery including the negative electrode, the positive electrode, and the organic electrolyte contacted with the separator, the copper material for the current collector is formed by a concave or convex portion, or a copper foil having a concave and a convex portion on the surface. It is intended to provide a Li-ion battery characterized by being constituted.
【００１５】本発明においては、負極集電体用銅材の表
面に凹部あるいは凸部を形成することによって銅材表面
でのカーボン層の動きを抑え、これによりカーボン層の
剥離を抑制するものである。従って、このためには、凹
部と凸部の形成ピッチを制限することが好ましく、２０
μｍ以上１０００μｍ未満のピッチで形成すべきであ
る。In the present invention, the concave portion or the convex portion is formed on the surface of the copper material for the negative electrode current collector to suppress the movement of the carbon layer on the surface of the copper material, thereby suppressing the peeling of the carbon layer. is there. Therefore, for this purpose, it is preferable to limit the formation pitch of the concave portion and the convex portion.
It should be formed at a pitch of not less than μm and less than 1000 μm.
【００１６】形成ピッチが２０μｍよりも小さくなる
と、１０数μｍの粒径を有するカーボン粒子が凸部間に
入り込むことが難しくなるためカーボン層の密着性が劣
るようになり、逆に、１０００μｍ以上になると、凹
部、凸部によるピンニング効果が不足することから、密
着性の向上に充分な結果を得ることが困難になる。When the formation pitch is smaller than 20 μm, it becomes difficult for carbon particles having a particle diameter of about 10 μm to enter between the projections, so that the adhesion of the carbon layer becomes inferior. Then, since the pinning effect by the concave and convex portions is insufficient, it is difficult to obtain a sufficient result for improving the adhesion.
【００１７】また、凹部の深さと凸部の高さは、少なく
とも５μｍ以上でかつ銅箔の上に形成されるカーボン層
の厚さよりも小さいことが好ましい。深さと高さが５μ
ｍを切る場合には、カーボン層の動きを抑えることが難
しくなり、逆に、カーボン層の厚さよりも大きくなる
と、カーボン層から凸部が突出することから、充電時に
Ｌｉイオンがこの銅の凸部に電着するようになり、充電
が困難になる。Preferably, the depth of the concave portion and the height of the convex portion are at least 5 μm or more and smaller than the thickness of the carbon layer formed on the copper foil. 5μ depth and height
m, it is difficult to suppress the movement of the carbon layer. Conversely, if the thickness is larger than the thickness of the carbon layer, the projections protrude from the carbon layer. Parts, and charging becomes difficult.
【００１８】銅箔に対する凹部と凸部の配列は、カーボ
ン層との密着性を高めるために銅箔の幅方向、長さ方
向、あるいは斜め方向など所定の方向に連続したものと
することが好ましい。凹部、凸部の形成は、エッチング
処理、あるいはロール加工等によって行われる。The arrangement of the concave portions and the convex portions with respect to the copper foil is preferably continuous in a predetermined direction such as the width direction, the length direction, or the oblique direction of the copper foil in order to enhance the adhesion to the carbon layer. . The formation of the concave portions and the convex portions is performed by an etching process, a roll process, or the like.
【００１９】[0019]
【発明の実施の形態】次に、本発明によるＬｉイオン電
池の負極集電体用銅材およびＬｉイオン電池の実施の形
態を説明する。Next, an embodiment of a copper material for a negative electrode current collector of a Li-ion battery and a Li-ion battery according to the present invention will be described.
【００２０】幅２１０ｍｍ、長さ２９７ｍｍ、および厚
さ３０μｍの圧延銅箔にフォトレジストを塗布し、これ
に、所定の形状と大きさの貫通孔を有するマスクに基づ
いた露光と現像を施した後、銅箔の露出部に対して完全
に溶出させないハーフエッチングを施すことによって表
面に多数の凸部を有する各実施例の負極集電体用銅材を
製作した。A photoresist is applied to a rolled copper foil having a width of 210 mm, a length of 297 mm, and a thickness of 30 μm, and after exposing and developing based on a mask having a through hole having a predetermined shape and size, The exposed portion of the copper foil was subjected to half-etching so as not to completely elute, thereby producing a copper material for a negative electrode current collector of each embodiment having a large number of convex portions on the surface.
【００２１】一方、カーボンとＰＶｄＦの重量比を９
５：５に設定し、分散液剤としてＮＭＰを使用したカー
ボンスラリーを準備して、これを各実施例の負極集電体
用銅材に塗布し、乾燥することにより各実施例に基づく
Ｌｉイオン電池用負極材をそれぞれ製作した。On the other hand, when the weight ratio between carbon and PVdF is 9
5: 5, a carbon slurry using NMP as a dispersing agent was prepared, applied to the copper material for a negative electrode current collector of each example, and dried to obtain a Li-ion battery based on each example. Negative electrode materials were manufactured.
【００２２】表１は、各実施例の負極集電体用銅材の構
成と、これを使用した負極材に対する試験結果をまとめ
たものである。試験は、銅材とカーボン層の密着強度を
測定することによって行われ、幅５０ｍｍの粘着テープ
をカーボン層に貼り付け、このテープを１ｍｍ／分の速
度で９０°方向に引っ張ったときの銅材とカーボン層が
剥離するときの最大引張強度を密着強度とした。従来例
としては、厚さ３０μｍｍの圧延銅箔を使用した。Table 1 summarizes the structure of the copper material for the negative electrode current collector of each embodiment and the test results for the negative electrode material using the same. The test was performed by measuring the adhesion strength between the copper material and the carbon layer. A 50 mm wide adhesive tape was attached to the carbon layer, and the tape was pulled in a 90 ° direction at a speed of 1 mm / min. And the maximum tensile strength when the carbon layer was peeled off was taken as the adhesion strength. As a conventional example, a rolled copper foil having a thickness of 30 μm was used.
【００２３】[0023]
【表１】 [Table 1]
【００２４】表１によれば、凸部を形成しない従来例の
密着強度が８．６ｋｇｆｍｍ-1であるのに対し、実施例
１〜４は１１．２〜１３．６ｋｇｆｍｍ-1と格段に高い
密着強度を示しており、本発明の効果が如実に現れてい
る。According to Table 1, while the adhesion strength of the conventional example having no projection is 8.6 kgfmm -1 , Examples 1-4 are remarkably high at 11.2 to 13.6 kgfmm -1. It shows the adhesion strength, and the effect of the present invention is clearly shown.
【００２５】なお、参考例１は、凸部間のピッチを５μ
ｍに設定した例であり、参考例２は、凸部のピッチを１
０００μｍに設定した例であるが、いずれも従来例と同
レベルの密着強度しか得られていない。本発明の実施に
際しては、凸部の形成ピッチに配慮する必要がある。ま
た、凸部の高さを５μｍに設定した実施例３に比べ、２
μｍに設定した参考例３が不充分な結果となっているよ
うに、凸部の高さについても配慮をする必要がある。In Reference Example 1, the pitch between the protrusions was 5 μm.
m, and in Reference Example 2, the pitch of the protrusions is 1
In each of the examples, the adhesion strength was the same level as that of the conventional example. In carrying out the present invention, it is necessary to consider the pitch at which the projections are formed. In addition, compared with the third embodiment in which the height of the projection is set to 5 μm,
It is necessary to consider the height of the projections so that Reference Example 3 set to μm gives an insufficient result.
【００２６】[0026]
【実施例II】表面を鏡面仕上げされた１組みのロールの
一方に、８００μｍピッチで深さ２０μｍの傷様の凹み
をロールの円周方向にスパイラル状に配列した圧延ロー
ルを準備し、鏡面仕上げされたロールとスパイラル状に
凹部を設けたロールの組合わせを、最終圧延パスに用
い、２０μｍまで圧延した。同様に、１０００μｍピッ
チで深さ２０μｍの傷様凹みを設けたロールを最終圧延
パスに用い、２０μｍまで圧延した。EXAMPLE II One roll of a pair of mirror-finished surfaces is provided with a roll of rolls in which scratch-like dents having a pitch of 800 μm and a depth of 20 μm are spirally arranged in the circumferential direction of the roll. The combination of the set roll and the roll having a spiral concave portion was used for a final rolling pass, and was rolled to 20 μm. Similarly, a roll provided with a scratch-like dent having a pitch of 1000 μm and a depth of 20 μm was used for the final rolling pass, and was rolled to 20 μm.
【００２７】表２は、以上により表面に凸部を形成され
た負極集電体用銅材にTable 2 shows the copper material for a negative electrode current collector having a projection formed on the surface as described above.
【実施例Ｉ】と同じカーボン層を形成することによって
Ｌｉイオン電池用負極材を構成し、A negative electrode material for a Li-ion battery was formed by forming the same carbon layer as in Example I.
【実施例Ｉ】と同様にして銅材とカーボン層の密着強度
を測定した結果を示したものである。This shows the result of measuring the adhesion strength between the copper material and the carbon layer in the same manner as in Example I.
【００２８】[0028]
【表２】 [Table 2]
【００２９】表２によれば、凹みの形成ピッチを８００
μｍに設定した圧延ロールによって製造された実施例５
による銅材が、カーボン層との間に１０．８ｋｇｆｍｍ
-1の密着強度を示しており、凸部のない従来例の密着強
度８．６ｋｇｆｍｍ-1に比べ高い特性を示している。こ
の結果は、ロール加工によってもエッチング加工と同様
の凸部の効果が得られることを意味する。参考例４の密
着強度が低いのは、凸部の形成ピッチが大きすぎること
による。According to Table 2, the pitch for forming the dents is 800
Example 5 manufactured by a rolling roll set to μm
10.8kgfmm between the copper material and the carbon layer
−1 , which is higher than the conventional adhesion strength of 8.6 kgfmm −1 having no projections. This result means that the same effect of the convex portion as the etching process can be obtained by the roll process. The reason why the adhesion strength of Reference Example 4 is low is that the pitch at which the projections are formed is too large.
【００３０】以上の実施例Ｉ、IIにおいては、いずれも
凸部を形成した例について示したが、凹部を形成すると
き、あるいは凹部と凸部を同時に形成するときにも同様
の効果が得られることは明白であり、また、このような
負極集電体用銅材を使用したＬｉイオン電池が良好な性
能を示すことも明白である。In the above embodiments I and II, the example in which the convex portion is formed is shown. However, the same effect can be obtained when the concave portion is formed, or when the concave portion and the convex portion are formed simultaneously. This is clear, and it is also clear that a Li-ion battery using such a copper material for a negative electrode current collector exhibits good performance.
【００３１】[0031]
【発明の効果】以上のように、本発明によるＬｉイオン
電池の負極集電体用銅材およびこれを使用したＬｉイオ
ン電池によれば、表面に凹部または（および）凸部を形
成した銅箔を負極集電体用銅材として使用するものであ
るので、凹部や凸部の存在がカーボン層の動きを抑制す
ることになり、従って、集電体用銅材とカーボン層の密
着強度を向上させることができる。As described above, according to the copper material for the negative electrode current collector of the Li-ion battery and the Li-ion battery using the same according to the present invention, the copper foil having the concave portion and / or the convex portion formed on the surface is provided. Is used as the copper material for the negative electrode current collector, so the presence of the concave portions and the convex portions suppresses the movement of the carbon layer, and therefore, the adhesion strength between the copper material for the current collector and the carbon layer is improved. Can be done.
【図１】Ｌｉイオン電池の説明図。FIG. 1 is an explanatory diagram of a Li-ion battery.
【図２】ＬｉＣ6 の構造図。FIG. 2 is a structural diagram of LiC 6 .
１ アルミニウム箔 ２ コバルト酸リチウム ３ 銅箔 ４ カーボン層 ５ セパレータ ６ 有機電解液 Ｓ スイッチ DESCRIPTION OF SYMBOLS 1 Aluminum foil 2 Lithium cobaltate 3 Copper foil 4 Carbon layer 5 Separator 6 Organic electrolyte S switch
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5H014 AA04 CC04 EE05 EE08 HH06 5H017 AA03 AS10 BB06 CC01 CC03 DD01 EE01 HH03 5H029 AJ04 AJ05 AK03 AL06 AL07 AL08 AM02 BJ12 DJ07 DJ14 EJ01 EJ04 HJ04 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H014 AA04 CC04 EE05 EE08 HH06 5H017 AA03 AS10 BB06 CC01 CC03 DD01 EE01 HH03 5H029 AJ04 AJ05 AK03 AL06 AL07 AL08 AM02 BJ12 DJ07 DJ14 EJ01 EJ04 HJ04
Claims (5)
集電体用銅材において、 前記銅箔は、その表面に凹部または凸部、あるいは凹部
および凸部を有することを特徴とするＬｉイオン電池の
負極集電体用銅材。1. A copper material for a negative electrode current collector of a Li-ion battery comprising a copper foil, wherein the copper foil has a concave portion or a convex portion, or a concave portion and a convex portion on a surface thereof. Copper material for negative electrode current collector of ion battery.
凸部は、２０μｍ以上１０００μｍ未満のピッチで形成
されることを特徴とする請求項１項記載のＬｉイオン電
池の負極集電体用銅材。2. The copper material for a negative electrode current collector of a Li-ion battery according to claim 1, wherein the concave portions or the convex portions or the concave portions and the convex portions are formed at a pitch of 20 μm or more and less than 1000 μm. .
凸部は、前記銅箔の幅方向あるいは長さ方向等所定の方
向に連続して形成されることを特徴とする請求項１項記
載のＬｉイオン電池の負極集電体用銅材。3. The method according to claim 1, wherein the concave or convex portions or the concave and convex portions are formed continuously in a predetermined direction such as a width direction or a length direction of the copper foil. Copper material for negative electrode current collector of Li-ion battery.
前記銅箔の上に形成されるカーボン層の厚さよりも小さ
く、かつ５μｍ以上に設定されることを特徴とする請求
項１項記載のＬｉイオン電池の負極集電体用銅材。4. The depth of the concave portion and the height of the convex portion,
2. The copper material for a negative electrode current collector of a Li-ion battery according to claim 1, wherein the thickness is set to be smaller than 5 μm and smaller than a thickness of a carbon layer formed on the copper foil. 3.
た負極と、正極と、前記負極よび正極の間に位置させら
れたセパレータと、前記負極、正極およびセパレータと
接触させられた有機電解液から構成されるＬｉイオン電
池において、 前記集電体用銅材は、凹部または凸部、あるいは凹部お
よび凸部を表面に有する銅箔によって構成されることを
特徴とするＬｉイオン電池。5. A negative electrode having a carbon layer formed on the surface of a current collector copper material, a positive electrode, a separator positioned between the negative electrode and the positive electrode, and contacted with the negative electrode, the positive electrode, and the separator. A Li-ion battery comprising an organic electrolyte, wherein the copper material for a current collector is constituted by a copper foil having a concave portion or a convex portion, or a concave portion and a convex portion on the surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11074908A JP2000268826A (en) | 1999-03-19 | 1999-03-19 | Copper material for negative electrode collector of li ion battery, and li ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11074908A JP2000268826A (en) | 1999-03-19 | 1999-03-19 | Copper material for negative electrode collector of li ion battery, and li ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000268826A true JP2000268826A (en) | 2000-09-29 |
Family
ID=13560967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11074908A Pending JP2000268826A (en) | 1999-03-19 | 1999-03-19 | Copper material for negative electrode collector of li ion battery, and li ion battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000268826A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8202642B2 (en) * | 2006-11-15 | 2012-06-19 | Panasonic Corporation | Current collector for non-aqueous secondary battery, electrode plate for non-aqueous secondary battery using the same, and non-aqueous secondary battery |
| WO2012131972A1 (en) * | 2011-03-31 | 2012-10-04 | 株式会社日立製作所 | Nonaqueous electrolyte battery |
| US20130302671A1 (en) * | 2007-12-12 | 2013-11-14 | Li-Tec Battery Gmbh | Current conductor comprising a segment with reduced thickness for a galvanic cell |
-
1999
- 1999-03-19 JP JP11074908A patent/JP2000268826A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8202642B2 (en) * | 2006-11-15 | 2012-06-19 | Panasonic Corporation | Current collector for non-aqueous secondary battery, electrode plate for non-aqueous secondary battery using the same, and non-aqueous secondary battery |
| US20130302671A1 (en) * | 2007-12-12 | 2013-11-14 | Li-Tec Battery Gmbh | Current conductor comprising a segment with reduced thickness for a galvanic cell |
| WO2012131972A1 (en) * | 2011-03-31 | 2012-10-04 | 株式会社日立製作所 | Nonaqueous electrolyte battery |
| JPWO2012131972A1 (en) * | 2011-03-31 | 2014-07-24 | 株式会社日立製作所 | Non-aqueous electrolyte battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3482443B2 (en) | Electrode for non-aqueous electrolyte secondary battery and method for producing the same | |
| JP5334156B2 (en) | Method for producing non-aqueous electrolyte secondary battery | |
| JP6300619B2 (en) | Method and apparatus for manufacturing electrode plate of lithium ion secondary battery | |
| JP2010186738A (en) | Anode plate for nonaqueous battery, electrode group for nonaqueous battery and its manufacturing method, and cylindrical nonaqueous secondary battery and its manufacturing method | |
| JP2015026607A (en) | Energy storage element and energy storage module | |
| CN114365306A (en) | Apparatus and method for manufacturing electrode of secondary battery using laser and electrode of secondary battery manufactured thereby | |
| JP3534031B2 (en) | Method for manufacturing electrode for battery / capacitor | |
| JP3157079B2 (en) | Manufacturing method of lithium secondary battery | |
| JP2003249223A (en) | Lithium ion secondary battery and its manufacturing method | |
| JPH11219709A (en) | Positive electrode plate of nonaqueous electrolyte battery | |
| KR20190129594A (en) | Method for recycling positive electrode material | |
| JPH09134726A (en) | Collector of electrochemical element, and manufacture of electrochemical element and collector of electrochemical element | |
| CN110911640A (en) | Multi-layer anode and lithium secondary battery comprising same | |
| JP3440963B2 (en) | Anode plate for lithium secondary battery | |
| JP2000294250A (en) | COPPER MATERIAL FOR NEGATIVE ELECTRODE CURRENT COLLECTOR OF Li ION BATTERY AND Li ION BATTERY | |
| JP5590173B2 (en) | Negative electrode for lithium ion secondary battery and lithium ion secondary battery | |
| JP3508455B2 (en) | Negative electrode plate for lithium ion battery and method for producing the same | |
| JPH1021928A (en) | Electrode material for secondary battery | |
| JP2007273124A (en) | Forming method of porous heatproof layer and forming device of porous heatproof layer | |
| JPH06260168A (en) | Lithium secondary battery | |
| JP2004139954A (en) | Negative electrode for non-aqueous electrolytic solution secondary battery and its manufacturing method as well as non-aqueous electrolytic solution secondary battery | |
| JPH0256871A (en) | Nonaqueous electrolyte secondary battery | |
| JP5325326B2 (en) | Current collector, electrode, secondary battery, and method of manufacturing secondary battery | |
| JP2000268826A (en) | Copper material for negative electrode collector of li ion battery, and li ion battery | |
| JP7168473B2 (en) | Negative electrode for all-solid-state battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20041101 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20041116 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20050322 |