JPH11167922A - Surface-treated copper foil and battery electrode using the same - Google Patents
Surface-treated copper foil and battery electrode using the sameInfo
- Publication number
- JPH11167922A JPH11167922A JP9335551A JP33555197A JPH11167922A JP H11167922 A JPH11167922 A JP H11167922A JP 9335551 A JP9335551 A JP 9335551A JP 33555197 A JP33555197 A JP 33555197A JP H11167922 A JPH11167922 A JP H11167922A
- Authority
- JP
- Japan
- Prior art keywords
- foil
- copper foil
- active material
- needle
- material layer
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/38—Improvement of the adhesion between the insulating substrate and the metal
- H05K3/382—Improvement of the adhesion between the insulating substrate and the metal by special treatment of the metal
-
- 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)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は表面処理された銅箔
及びこれを用いた電池用電極に関する。更に詳しくはリ
チウムイオン電池の集電体として用いられる電極に適す
る表面処理銅箔に関するものである。The present invention relates to a surface-treated copper foil and a battery electrode using the same. More specifically, the present invention relates to a surface-treated copper foil suitable for an electrode used as a current collector of a lithium ion battery.
【０００２】[0002]
【従来の技術】この種のリチウムイオン電池の負極は、
圧延銅箔、電解銅箔等の銅箔からなる集電体上に活物質
層を有する。この活物質層は黒鉛のような活物質とバイ
ンダを含むスラリーを塗布し乾燥することにより形成さ
れる。しかし単に活物質スラリーを銅箔の集電体上に塗
布し乾燥しただけでは活物質層の接着力が不十分であっ
て、活物質層が集電体から剥離し易い。このため接着剤
を活物質スラリーに添加混合したり、或はスラリー中の
バインダを接着剤として機能する物質に変えることによ
り、活物質層の集電体への接着力を高めていた。この接
着力を高めた活物質層において、電池の容量を増大させ
るためには活物質を多く配合する必要があるが、活物質
の量を多くすると、接着剤や接着剤として機能していた
バインダの量が相対的に低下して再び接着力が劣り、集
電体から活物質層が剥離する問題を生じる。そのため、
従来より箔状の集電体の表面をサンドブラスト法により
粗面化する方法（特開平９−２２６９９）又は箔状の集
電体を凹凸が付いたガイドローラに通して粗面化する方
法（特開平８−１９５２０２）などにより、集電体から
の活物質層の剥離を抑制することが提案されている。2. Description of the Related Art The negative electrode of this type of lithium ion battery is:
An active material layer is provided on a current collector made of a copper foil such as a rolled copper foil and an electrolytic copper foil. This active material layer is formed by applying and drying a slurry containing an active material such as graphite and a binder. However, simply applying the active material slurry on a copper foil current collector and drying it is insufficient in the adhesive force of the active material layer, and the active material layer is easily peeled off from the current collector. For this reason, the adhesive force of the active material layer to the current collector has been increased by adding and mixing the adhesive to the active material slurry or changing the binder in the slurry to a material that functions as an adhesive. In this active material layer with increased adhesive strength, it is necessary to mix a large amount of active material in order to increase the capacity of the battery. However, if the amount of active material is increased, the adhesive or the binder functioning as an adhesive is required. , The adhesive strength is again deteriorated and the active material layer is separated from the current collector. for that reason,
Conventionally, a method of roughening the surface of a foil-shaped current collector by a sandblast method (Japanese Patent Laid-Open No. 9-22699) or a method of roughening the surface of a foil-shaped current collector by passing it through a guide roller having irregularities (particularly, For example, Japanese Unexamined Patent Publication No. 8-195202) proposes to suppress the separation of the active material layer from the current collector.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記２つの公
報に開示された方法による粗面化では、集電体からの活
物質層の剥離の抑制効果が不十分で、活物質層中に活物
質を多く配合した場合には、活物質層が集電体から剥離
してしまう問題点が依然として残されていた。本発明の
目的は、活物質の配合を多くした活物質層を箔表面に形
成して電池の容量を増大させても、活物質層が剥離する
ことのない表面処理銅箔及びこれを用いた電池用電極を
提供することにある。However, the surface roughening by the methods disclosed in the above two publications has an insufficient effect of suppressing the separation of the active material layer from the current collector, and the active material in the active material layer does not have sufficient effect. When many substances are blended, there still remains a problem that the active material layer is separated from the current collector. An object of the present invention is to use a surface-treated copper foil in which an active material layer is not peeled off even when an active material layer containing a large amount of an active material is formed on a foil surface to increase the capacity of a battery, and using the same. An object of the present invention is to provide a battery electrode.
【０００４】[0004]
【課題を解決するための手段】請求項１に係る発明は、
図１に示すように、箔本体１０の表面から針状体１１が
前記表面に５〜９００本／μｍ2の平均密度で前記表面
から突出して形成された表面処理銅箔である。請求項２
に係る発明は、請求項１に係る発明であって、針状体１
１の平均長さが０．０５〜２．０μｍである表面処理銅
箔である。請求項３に係る発明は、図４に示すように、
請求項１又は２記載の表面処理銅箔を集電体として用い
た電池用電極である。The invention according to claim 1 is
As shown in FIG. 1, the surface-treated copper foil is formed by projecting needle-like bodies 11 from the surface of the foil main body 10 at an average density of 5 to 900 pieces / μm 2 from the surface. Claim 2
The invention according to claim 1 is the invention according to claim 1, wherein the needle-like body 1
1 is a surface-treated copper foil having an average length of 0.05 to 2.0 μm. The invention according to claim 3 is, as shown in FIG.
A battery electrode using the surface-treated copper foil according to claim 1 or 2 as a current collector.
【０００５】この表面処理銅箔を電池用電極の集電体と
して用いる場合に、図４に示すように箔表面に活物質ス
ラリーを塗布し乾燥して活物質層１２を形成すると、箔
本体１０の表面に高密度で突出して形成された針状体１
１が活物質層１２の内部に食込み、投錨効果を生じる。
この針状体１１の投錨効果により活物質層１２が箔本体
１０と強固に接着する。従って活物質層１２中の活物質
の配合量を多くしても箔本体１０から活物質層１２が剥
離することなく電池の高容量化が可能となる。When this surface-treated copper foil is used as a current collector for a battery electrode, an active material slurry is applied to the foil surface and dried to form an active material layer 12 as shown in FIG. Needle-like body 1 protruding at high density on the surface of
1 penetrates into the active material layer 12 to produce an anchoring effect.
The active material layer 12 is firmly adhered to the foil main body 10 by the anchor effect of the needle-like body 11. Therefore, even if the amount of the active material in the active material layer 12 is increased, the capacity of the battery can be increased without the active material layer 12 peeling off from the foil body 10.
【０００６】[0006]
【発明の実施の形態】本発明の銅箔は、純銅からなる箔
に限らず、銅を基とする合金からなる箔を包含する。ま
た銅の針状体も、純銅からなる針状体に限らず、銅を基
とする合金からなる針状体を包含する。この銅箔の厚さ
は、本発明の銅箔の用途に応じて決められる。電池の電
極とする場合には、図１に示す箔本体１０の厚さは５〜
１００μｍ、好ましくは１０〜３０μｍである。５μｍ
未満の場合には、集電体としての強度が不足し、１００
μｍを超えると体積当りの容量が低下し好ましくない。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The copper foil of the present invention is not limited to a foil made of pure copper, but includes a foil made of a copper-based alloy. The copper needles are not limited to the needles made of pure copper, but include needles made of an alloy based on copper. The thickness of the copper foil is determined according to the use of the copper foil of the present invention. When used as a battery electrode, the thickness of the foil body 10 shown in FIG.
It is 100 μm, preferably 10 to 30 μm. 5 μm
If less, the strength as a current collector is insufficient, and
If it exceeds μm, the capacity per volume is undesirably reduced.
【０００７】図１に示すように、この表面処理された銅
箔は、箔本体１０の表面の垂直方向に突出して形成され
る針状体１１は以下のように形成される。先ず銅箔を酸
化処理することにより酸化銅の針状体を箔本体から成長
させて箔表面に形成する。この酸化処理の方法としては
加熱するか、或は亜塩素酸、ペルオキソ二硫酸塩等の酸
化剤を含むアルカリ又は中性の水溶液に浸漬して行われ
る。次いで酸化処理された銅箔を陰極に用いた電解処理
を行うことにより、銅箔の表面に形成されていた針状体
の酸化銅を還元して銅からなる針状体１１を形成する。
この電解処理の電解液としてはＮａＯＨ、Ｈ2ＳＯ4、Ｎ
ａ3ＰＯ4のようなアルカリ、酸、塩を１種類以上溶解さ
せた水溶液が挙げられる。電解液のｐＨは好ましくは７
以上である。As shown in FIG. 1, this surface-treated copper foil has a needle-like body 11 formed so as to protrude in the vertical direction on the surface of a foil body 10 as follows. First, copper oxide needles are grown from the foil body by oxidizing the copper foil and formed on the foil surface. This oxidation treatment is carried out by heating or immersing in an alkali or neutral aqueous solution containing an oxidizing agent such as chlorous acid or peroxodisulfate. Next, by performing electrolytic treatment using the oxidized copper foil as a cathode, the acicular copper oxide formed on the surface of the copper foil is reduced to form the acicular body 11 made of copper.
As the electrolytic solution for this electrolytic treatment, NaOH, H 2 SO 4 , N
An aqueous solution in which one or more alkalis, acids, and salts such as a 3 PO 4 are dissolved is exemplified. The pH of the electrolyte is preferably 7
That is all.
【０００８】上記銅箔の処理温度、処理時間、処理雰囲
気、処理液組成等の酸化条件を制御することにより、針
状体の密度及び長さを調整することができる。この箔本
体の表面に形成される針状体の好ましい平均密度は２０
〜１００本／μｍ2である。密度が５本／μｍ2未満の場
合には、後工程で箔本体１０の表面に形成される活物質
層に対する投錨効果が不十分となり、９００本／μｍ2
を超えると活物質層の箔本体への密着が困難になる。ま
たこの箔本体の表面に形成される針状体の好ましい平均
長さは０．１〜０．５μｍである。長さが０．０５μｍ
未満の場合及び２．０μｍを超える場合にはいずれも上
記投錨効果が不十分となる。The density and length of the needle-shaped body can be adjusted by controlling the oxidizing conditions such as the processing temperature, processing time, processing atmosphere, and processing solution composition of the copper foil. The preferred average density of the needles formed on the surface of the foil body is 20.
１００100 / μm 2 . When the density is less than 5 / μm 2 , the anchoring effect on the active material layer formed on the surface of the foil body 10 in a later step becomes insufficient, and 900 / μm 2.
If it exceeds 300, it will be difficult to adhere the active material layer to the foil body. The preferred average length of the needle-shaped body formed on the surface of the foil body is 0.1 to 0.5 μm. Length is 0.05μm
When the diameter is less than 2.0 μm or less than 2.0 μm, the anchoring effect becomes insufficient.
【０００９】[0009]
【実施例】次に本発明の具体的態様を示すために、本発
明の実施例を比較例とともに説明する。 ＜実施例１＞ (a) 銅箔の酸化 厚さ１８μｍの圧延銅箔をＮａＣｌＯ2を４０ｇ／ｌ、
ＮａＯＨを１５ｇ／ｌ、及びＮａ3ＰＯ4・１２Ｈ2Ｏを
１２ｇ／ｌの割合で含む９５℃の水溶液に３分間浸漬し
て表面に酸化銅の針状体を形成した後、２０℃のイオン
交換水で１分間洗浄した。EXAMPLES Next, examples of the present invention will be described together with comparative examples in order to show specific embodiments of the present invention. <Example 1> (a) Oxidation of copper foil A rolled copper foil having a thickness of 18 µm was prepared by adding 40 g / l of NaClO 2 ,
After immersing in a 95 ° C. aqueous solution containing 15 g / l of NaOH and 12 g / l of Na 3 PO 4 .12H 2 O for 3 minutes to form needles of copper oxide on the surface, ions at 20 ° C. Washed for 1 minute with exchanged water.
【００１０】(b) 銅箔の電解 ＮａＯＨを４０ｇ／ｌ含む２５℃の水溶液中において、
上記工程(a)で酸化した銅箔を陰極とし、ステンレス鋼
（ＳＵＳ３０４）を陽極として１．５Ｖの定電圧で電解
を行った。電流値が次第に減少して、一定値を示すよう
になったところで電解を終了し、電解処理した銅箔を２
０℃のイオン交換水で１分間洗浄し、乾燥した。電解し
た銅箔の一部を窒素で脱気した２０℃の１０％硫酸に浸
漬したが、変化は認められず、このことから表面の酸化
銅が銅に還元されたことが明らかとなった。電解後の銅
箔の走査型電子顕微鏡（ＳＥＭ）写真を図２及び図３に
示す。(B) Electrolysis of copper foil In a 25 ° C. aqueous solution containing 40 g / l of NaOH,
Electrolysis was performed at a constant voltage of 1.5 V using the copper foil oxidized in the above step (a) as a cathode and stainless steel (SUS304) as an anode. When the current value gradually decreases and reaches a constant value, the electrolysis is terminated, and the electrolytically treated copper foil is removed.
It was washed with ion exchanged water at 0 ° C. for 1 minute and dried. A part of the electrolyzed copper foil was immersed in 10% sulfuric acid at 20 ° C. degassed with nitrogen, but no change was observed. This revealed that copper oxide on the surface was reduced to copper. FIGS. 2 and 3 show scanning electron microscope (SEM) photographs of the copper foil after the electrolysis.
【００１１】(c) 電池の負極の作製 平均粒径２０μｍの黒鉛粉末からなる活物質９０重量％
と、ポリフッ化ビニリデンからなるバインダ１０重量％
をＮ−メチルピロリドンからなる溶媒に分散させて活物
質スラリーを調製した。上記工程(b)で電解した銅箔の
表面にこのスラリーをドクターブレードを使用して塗
布、乾燥した後、８０％の厚さまでロールプレスし、１
００μｍの厚さにした。こうして、図４に示すように圧
延銅箔１０の電解処理面に活物質層１２が形成された厚
さ１００μｍの実施例１のリチウムイオン電池の負極を
作製した。(C) Preparation of negative electrode for battery 90% by weight of active material comprising graphite powder having an average particle size of 20 μm
And 10% by weight of a binder made of polyvinylidene fluoride
Was dispersed in a solvent composed of N-methylpyrrolidone to prepare an active material slurry. This slurry was applied to the surface of the copper foil electrolyzed in the above step (b) using a doctor blade, dried, and then roll-pressed to a thickness of 80%.
The thickness was set to 00 μm. Thus, a negative electrode of the lithium ion battery of Example 1 having a thickness of 100 μm in which the active material layer 12 was formed on the electrolytically treated surface of the rolled copper foil 10 as shown in FIG. 4 was produced.
【００１２】＜比較例１＞実施例１と同一の厚さ１８μ
ｍの圧延銅箔を用い、この圧延銅箔に対し、上記工程
(a)及び上記工程(b)を実施しないで、これ以外は実質的
に実施例１の方法で圧延銅箔の表面に活物質層が形成さ
れた厚さ１００μｍの比較例１のリチウムイオン電池の
負極を作製した。ここで、実施例１及び比較例１のリチ
ウムイオン電池の負極の銅箔表面から活物質層表面まで
の電気抵抗値をデジタルマルチメータで測定したが、同
等の値であった。このことからも実施例１の銅箔表面に
酸化銅は残留していないことが明らかである。<Comparative Example 1> The same thickness of 18 μm as in Example 1
m rolled copper foil and the above process
The lithium ion battery of Comparative Example 1 having a thickness of 100 μm and having the active material layer formed on the surface of the rolled copper foil by the method of Example 1 except that (a) and the step (b) were not performed Was produced. Here, the electric resistance value from the copper foil surface of the negative electrode of the lithium ion batteries of Example 1 and Comparative Example 1 to the surface of the active material layer was measured by a digital multimeter and found to be equivalent. From this, it is clear that no copper oxide remains on the copper foil surface of Example 1.
【００１３】＜比較評価＞実施例１及び比較例１のリチ
ウムイオン電池の負極について、それぞれの負極を構成
する活物質層から銅箔を引き剥がす試験を実施した。こ
の引き剥がし試験では、先ず負極を１０ｍｍ×１８０ｍ
ｍの大きさに切断し、次いで両面テープで活物質層表面
を銅板に貼付けた。次に銅箔の１０ｍｍ×１０ｍｍ部分
を剥離させ、引張り試験器のつかみ具でつかみ、銅板に
対して垂直方向に毎分１００ｍｍで引上げ、引き剥がし
荷重を測定した。測定結果はＪＩＳ−Ｋ６８５４（接着
剤のはく離接着強さ試験方法）に準拠して処理した。そ
の結果を表１に示す。<Comparative Evaluation> With respect to the negative electrodes of the lithium ion batteries of Example 1 and Comparative Example 1, a test was conducted in which a copper foil was peeled off from the active material layer constituting each negative electrode. In this peeling test, first, the negative electrode was 10 mm × 180 m
m, and the surface of the active material layer was attached to a copper plate with a double-sided tape. Next, a 10 mm × 10 mm portion of the copper foil was peeled off, gripped with a gripper of a tensile tester, pulled up in a direction perpendicular to the copper plate at 100 mm / min, and the peeling load was measured. The measurement results were processed in accordance with JIS-K6854 (test method for peel strength of adhesive). Table 1 shows the results.
【００１４】[0014]
【表１】 [Table 1]
【００１５】表１より明らかなように、本発明の銅箔を
用いて作製した実施例１のリチウムイオン電池の負極は
表面処理を施していない圧延銅箔を用いて作製した比較
例１のリチウムイオン電池の負極に比べて活物質層と銅
箔との接着力が大きい。比較例１のリチウムイオン電池
の負極においては界面破壊が生じたのに対し、実施例１
のリチウムイオン電池の負極においては活物質層の凝集
破壊が生じたことから、本発明の表面処理銅箔を用いる
ことにより、界面の相互作用が増大し、十分な界面にお
ける接着力が得られたことが明らかとなった。As is clear from Table 1, the negative electrode of the lithium ion battery of Example 1 manufactured using the copper foil of the present invention was manufactured using the rolled copper foil having no surface treatment. The adhesive force between the active material layer and the copper foil is larger than that of the negative electrode of the ion battery. In the negative electrode of the lithium ion battery of Comparative Example 1, interfacial breakdown occurred.
In the negative electrode of the lithium ion battery, cohesive failure of the active material layer occurred, and thus, by using the surface-treated copper foil of the present invention, interaction at the interface was increased, and sufficient adhesive force at the interface was obtained. It became clear.
【００１６】[0016]
【発明の効果】以上述べたように、本発明によれば、箔
本体の箔表面から針状体を５〜９００本／μｍ2の平均
密度で表面から突出して形成するようにしたので、箔本
体の表面に形成される活物質層の内部に針状体が食込む
ことにより、活物質層が箔本体と強固に接着する。従っ
て活物質層中の活物質の量を相対的に多く配合しても、
活物質層の箔本体に対する接着力は低下せず、活物質層
が箔本体から活物質層が剥離することなく、電池を高容
量化することが可能となる。As described above, according to the present invention, the needle-like bodies are formed so as to protrude from the foil surface of the foil body at an average density of 5 to 900 needles / μm 2 from the foil surface. The active material layer is firmly adhered to the foil main body when the needle-like body bites into the active material layer formed on the surface of the main body. Therefore, even if the amount of the active material in the active material layer is relatively large,
The adhesive strength of the active material layer to the foil main body does not decrease, and the active material layer does not peel off from the foil main body, so that the capacity of the battery can be increased.
【図１】本発明の表面処理銅箔の要部の拡大して模式的
に示す断面図。FIG. 1 is a cross-sectional view schematically showing an enlarged main part of a surface-treated copper foil of the present invention.
【図２】図３の銅箔表面を倍率を高めて撮影した走査型
電子顕微鏡写真図。FIG. 2 is a scanning electron micrograph of the copper foil surface of FIG. 3 taken at an increased magnification.
【図３】電解処理後の実施例１の銅箔表面を斜めから撮
影した走査型電子顕微鏡写真図。FIG. 3 is a scanning electron micrograph showing a surface of the copper foil of Example 1 after the electrolytic treatment, taken obliquely.
【図４】図１の表面処理銅箔の表面に活物質層を形成し
た状態を拡大して模式的に示す断面図。FIG. 4 is an enlarged cross-sectional view schematically showing a state in which an active material layer is formed on the surface of the surface-treated copper foil of FIG. 1;
１０ 箔本体 １１ 針状体 １２ 活物質層 Reference Signs List 10 foil body 11 needle-shaped body 12 active material layer
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【手続補正書】[Procedure amendment]
【提出日】平成９年１２月５日[Submission date] December 5, 1997
【手続補正１】[Procedure amendment 1]
【補正対象書類名】図面[Document name to be amended] Drawing
【補正対象項目名】図２[Correction target item name] Figure 2
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【図２】 FIG. 2
【手続補正２】[Procedure amendment 2]
【補正対象書類名】図面[Document name to be amended] Drawing
【補正対象項目名】図３[Correction target item name] Figure 3
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【図３】 FIG. 3
Claims (3)
前記表面に５〜９００本／μｍ2の平均密度で前記表面
から突出して形成された表面処理銅箔。1. A surface-treated copper foil formed by projecting copper needles (11) from the surface of the foil main body (10) at an average density of 5 to 900 wires / μm 2 from the surface.
２．０μｍである請求項１記載の表面処理銅箔。2. An average length of the copper acicular body (11) is 0.05 to
The surface-treated copper foil according to claim 1, which has a thickness of 2.0 µm.
電体として用いた電池用電極。3. A battery electrode using the surface-treated copper foil according to claim 1 as a current collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9335551A JPH11167922A (en) | 1997-12-05 | 1997-12-05 | Surface-treated copper foil and battery electrode using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9335551A JPH11167922A (en) | 1997-12-05 | 1997-12-05 | Surface-treated copper foil and battery electrode using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11167922A true JPH11167922A (en) | 1999-06-22 |
Family
ID=18289853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9335551A Withdrawn JPH11167922A (en) | 1997-12-05 | 1997-12-05 | Surface-treated copper foil and battery electrode using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11167922A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999056332A1 (en) * | 1998-04-24 | 1999-11-04 | Hitachi, Ltd. | Lithium secondary cell |
| EP1069635A1 (en) * | 1999-07-13 | 2001-01-17 | Hughes Electronics Corporation | Lithium-ion battery cell having an oxidized/reduced negative current collector |
| JP2002313348A (en) * | 2001-04-12 | 2002-10-25 | Nec Corp | Secondary battery |
| JP2006278882A (en) * | 2005-03-30 | 2006-10-12 | Furukawa Circuit Foil Kk | Copper foil and copper foil for inner layer substrate |
| JP2008103118A (en) * | 2006-10-17 | 2008-05-01 | Nissan Motor Co Ltd | Electrode for battery |
| CN111600036A (en) * | 2020-06-01 | 2020-08-28 | 南开大学 | Three-dimensional porous copper oxide modified copper foil for lithium metal battery current collector and preparation method and application thereof |
| WO2020179183A1 (en) * | 2019-03-04 | 2020-09-10 | ナミックス株式会社 | Copper foil, negative electrode current collector for lithium ion battery including same, and production method therefor |
| WO2020179181A1 (en) * | 2019-03-04 | 2020-09-10 | ナミックス株式会社 | Copper foil and lithium ion battery negative electrode current collector including said copper foil, and manufacturing method thereof |
-
1997
- 1997-12-05 JP JP9335551A patent/JPH11167922A/en not_active Withdrawn
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999056332A1 (en) * | 1998-04-24 | 1999-11-04 | Hitachi, Ltd. | Lithium secondary cell |
| JPH11307102A (en) * | 1998-04-24 | 1999-11-05 | Hitachi Ltd | Lithium secondary battery and manufacture thereof |
| EP1069635A1 (en) * | 1999-07-13 | 2001-01-17 | Hughes Electronics Corporation | Lithium-ion battery cell having an oxidized/reduced negative current collector |
| JP2004095537A (en) * | 1999-07-13 | 2004-03-25 | Hughes Electronics Corp | Manufacturing method of lithium ion battery cell having oxidized/reduced negative current collector |
| JP2002313348A (en) * | 2001-04-12 | 2002-10-25 | Nec Corp | Secondary battery |
| JP2006278882A (en) * | 2005-03-30 | 2006-10-12 | Furukawa Circuit Foil Kk | Copper foil and copper foil for inner layer substrate |
| JP4532322B2 (en) * | 2005-03-30 | 2010-08-25 | 古河電気工業株式会社 | Copper foil for built-up board inner layer |
| JP2008103118A (en) * | 2006-10-17 | 2008-05-01 | Nissan Motor Co Ltd | Electrode for battery |
| JP2020194615A (en) * | 2019-03-04 | 2020-12-03 | ナミックス株式会社 | Copper foil and negative electrode collector of lithium ion battery including the same and manufacturing method thereof |
| WO2020179183A1 (en) * | 2019-03-04 | 2020-09-10 | ナミックス株式会社 | Copper foil, negative electrode current collector for lithium ion battery including same, and production method therefor |
| WO2020179181A1 (en) * | 2019-03-04 | 2020-09-10 | ナミックス株式会社 | Copper foil and lithium ion battery negative electrode current collector including said copper foil, and manufacturing method thereof |
| JP2020145002A (en) * | 2019-03-04 | 2020-09-10 | ナミックス株式会社 | Copper foil and negative electrode current collector of lithium ion battery including the same, and method for manufacturing the same |
| CN113286917A (en) * | 2019-03-04 | 2021-08-20 | 纳美仕有限公司 | Copper foil, negative electrode collector of lithium ion battery containing copper foil, and method for producing same |
| CN113330611A (en) * | 2019-03-04 | 2021-08-31 | 纳美仕有限公司 | Copper foil, negative electrode collector for lithium ion battery comprising same, and method for producing same |
| TWI821504B (en) * | 2019-03-04 | 2023-11-11 | 日商納美仕有限公司 | Copper foil, negative electrode current collector of lithium ion battery including the copper foil, and method of manufacturing the negative electrode current collector |
| CN113286917B (en) * | 2019-03-04 | 2024-03-01 | 纳美仕有限公司 | Copper foil, negative electrode current collector for lithium ion battery containing copper foil, and method for producing same |
| CN113330611B (en) * | 2019-03-04 | 2024-07-09 | 纳美仕有限公司 | Copper foil, negative electrode current collector of lithium ion battery comprising same, and method for manufacturing same |
| CN111600036A (en) * | 2020-06-01 | 2020-08-28 | 南开大学 | Three-dimensional porous copper oxide modified copper foil for lithium metal battery current collector and preparation method and application thereof |
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Legal Events
| Date | Code | Title | Description |
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| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20050301 |