JPH0869814A - Manufacture of battery - Google Patents
Manufacture of batteryInfo
- Publication number
- JPH0869814A JPH0869814A JP6206580A JP20658094A JPH0869814A JP H0869814 A JPH0869814 A JP H0869814A JP 6206580 A JP6206580 A JP 6206580A JP 20658094 A JP20658094 A JP 20658094A JP H0869814 A JPH0869814 A JP H0869814A
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- plating
- electrode
- battery
- tensile strength
- 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- Withdrawn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
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、金属多孔体を電極用支
持体に用いた電池の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a battery using a metal porous body as a support for electrodes.
【０００２】[0002]
【従来の技術】近年、各種電子機器、特に携帯機器用の
電源として高容量のニッケル−カドミウム（Ｎｉ−Ｃ
ｄ）電池やニッケル−水素（Ｎｉ−ＭＨ）電池などのア
ルカリ蓄電池が注目されている。従来、アルカリ蓄電池
の正極には、Ｎｉ粉末を焼結した焼結式基板が用いられ
ていた。しかし、この基板は気孔度が８０％と小さいこ
とから、近年高容量電池には、気孔度が９５％と大き
く、三次元的連続気孔を有する発泡金属や金属不織布な
どが電極支持体として用いられている。2. Description of the Related Art In recent years, high capacity nickel-cadmium (Ni-C) has been used as a power source for various electronic devices, especially portable devices.
d) Attention has been paid to alkaline storage batteries such as batteries and nickel-hydrogen (Ni-MH) batteries. Conventionally, a sintered substrate obtained by sintering Ni powder has been used for the positive electrode of an alkaline storage battery. However, since this substrate has a small porosity of 80%, a high-capacity battery has a large porosity of 95% in recent years, and a metal foam or metal nonwoven fabric having three-dimensional continuous pores is used as an electrode support. ing.
【０００３】発泡金属は、たとえば特公昭５７−３９３
１７号公報に開示されるように、カーボン粉末を発泡ウ
レタン等の基材に塗布し、ドラムめっきと呼ばれる電気
めっきを行ない、この後通常の電気めっきを行なって、
加熱により基材を除去して得られていた。また、特開昭
６１−７６６８６号公報に開示されるように、金属被膜
を気相法によって基材上に形成し、電気めっきを施した
後、基材を除去する方法もある。また最近、基材に無電
解めっきを施した後、電気めっきをさらに行ない基材を
除去して電極支持体を得るという手法も用いられるよう
になってきている。The foam metal is, for example, Japanese Patent Publication No. 57-393.
As disclosed in Japanese Patent Publication No. 17, a carbon powder is applied to a base material such as urethane foam, electroplating called drum plating is performed, and then normal electroplating is performed.
It was obtained by removing the base material by heating. Further, as disclosed in JP-A-61-76686, there is also a method of forming a metal film on a base material by a vapor phase method, performing electroplating, and then removing the base material. Recently, a method has also been used in which after electroless plating is applied to a base material, electroplating is further performed to remove the base material to obtain an electrode support.
【０００４】このようにして得られる金属多孔体に活物
質を塗布、充填して得られた電極と、対極およびセパレ
ータとを捲回して電池を構成する際、金属多孔体に亀裂
等が発生しないようその強度に留意しなければならなか
った。When a battery is constructed by winding an electrode obtained by coating and filling an active material on the porous metal body thus obtained, and a counter electrode and a separator, a crack or the like does not occur in the porous metal body. So I had to pay attention to its strength.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、比較
的脆弱な金属多孔体を電極支持体として用いる電池の製
造において、上述した亀裂等の発生の問題なく、安定し
て電池を組立てることができる方法を提供することにあ
る。SUMMARY OF THE INVENTION An object of the present invention is to stably assemble a battery without the above-mentioned problems such as cracks in the production of a battery using a relatively fragile metal porous body as an electrode support. It is to provide a method that can.
【０００６】[0006]
【課題を解決するための手段】本発明に従う電池の製造
方法は、有機ポリマー繊維からなる不織布を準備し、そ
の縦方向とそれに垂直な横方向のいずれが高い引張強度
を有するか確認する工程と、準備された不織布にめっき
を施す工程と、めっきされた不織布に熱処理を施して前
記不織布を除去した後、前記めっきによる金属多孔体を
得る工程と、得られた金属多孔体において、熱処理の
前、不織布の縦方向と横方向のうち引張強度の高い方向
に対応していた方向（以下Ａ方向とする）を決定する工
程と、金属多孔体に活物質を充填し電極を形成する工程
と、得られた電極と、さらに準備した対極およびセパレ
ータとを前記Ａ方向とほぼ平行な方向に捲回して電池を
構成する工程とを備える。A method for manufacturing a battery according to the present invention comprises the steps of preparing a non-woven fabric made of organic polymer fibers and confirming whether the longitudinal direction or the transverse direction perpendicular thereto has a high tensile strength. A step of plating the prepared non-woven fabric, a step of subjecting the plated non-woven fabric to a heat treatment to remove the non-woven fabric, and then obtaining a metal porous body by the plating; A step of determining a direction (hereinafter referred to as an A direction) corresponding to a direction having a high tensile strength in the longitudinal direction and the transverse direction of the non-woven fabric, and a step of filling the metal porous body with an active material to form an electrode, The method includes a step of winding the obtained electrode and the prepared counter electrode and separator in a direction substantially parallel to the direction A to form a battery.
【０００７】本発明において、有機ポリマー繊維からな
る不織布として、ポリエチレンまたはポリプロピレン等
からなる不織布を用いることができる。不織布には、バ
インダを用いて有機短繊維間を接着したものの他、有機
短繊維を熱溶着したものを用いることができる。In the present invention, a nonwoven fabric made of polyethylene, polypropylene or the like can be used as the nonwoven fabric made of organic polymer fibers. As the non-woven fabric, it is possible to use one in which organic short fibers are bonded together using a binder, or one in which organic short fibers are heat-welded.
【０００８】金属多孔体は、たとえば次のようにして形
成することができる。たとえば、基材上に無電解めっき
を行なって導電性を付与した後、電気めっきを行ない、
次いで、基材を分解除去することにより、めっきによる
金属多孔体が得られる。また、基材にカーボンを塗布し
て導電性を付与した後、電気めっきを行ない、次いで基
材を分解除去することにより、めっきのによる金属多孔
体が得られる。さらに、基材上にスパッタリング等で金
属を蒸着させ、導電性を付与した後、電気めっきを行な
い、次いで基材を分解除去することにより、金属多孔体
が得られる。The metal porous body can be formed, for example, as follows. For example, electroless plating is performed after electroless plating is applied to the base material to impart conductivity,
Then, the base material is decomposed and removed to obtain a porous metal body by plating. Further, by coating the base material with carbon to impart conductivity, electroplating is performed, and then the base material is decomposed and removed to obtain a metal porous body by plating. Furthermore, a metal porous body is obtained by depositing a metal on the base material by sputtering or the like to impart conductivity, then electroplating, and then disassembling and removing the base material.
【０００９】無電解めっきには、還元剤としてたとえば
次亜リン酸またはホウ素化合物を用いた無電解ニッケル
めっきが用いられる。ホウ素化合物には、たとえば水素
化ホウ素化合物、ジメチルアミンボランなどがある。無
電解めっきでは、不織布上にたとえばＰｄ／Ｓｎ触媒を
吸着させた後、触媒を活性化し、次いでニッケルおよび
還元剤を含むめっき液に不織布を浸漬する。このような
無電解ニッケルめっきの後、めっき重量を調節する目的
で、電気ニッケルめっきを行なうことができる。不織布
は、たとえば酸素雰囲気中での熱処理により分解除去す
ることができる。その後、得られた金属多孔体を、たと
えば水素などの還元性雰囲気中で熱処理することによ
り、集電体としての金属多孔体を得ることができる。In electroless plating, electroless nickel plating using, for example, hypophosphorous acid or a boron compound as a reducing agent is used. Examples of the boron compound include borohydride compounds and dimethylamine borane. In electroless plating, for example, a Pd / Sn catalyst is adsorbed on the nonwoven fabric, the catalyst is activated, and then the nonwoven fabric is immersed in a plating solution containing nickel and a reducing agent. After such electroless nickel plating, electric nickel plating can be performed for the purpose of adjusting the plating weight. The non-woven fabric can be decomposed and removed, for example, by heat treatment in an oxygen atmosphere. Then, the obtained metal porous body is heat-treated in a reducing atmosphere such as hydrogen to obtain a metal porous body as a current collector.
【００１０】電極形成のため、得られた集電体としての
金属多孔体には活物質が充填される。活物質には、たと
えば、アルカリ蓄電池の場合、水酸化ニッケルを主成分
とする混合物が用いられる。混合物における他の成分と
しては、たとえばコバルト３〜１５重量％、水酸化コバ
ルト１〜５重量％、酸化亜鉛１〜５重量％を挙げること
ができる。その他に、ポリビニルアルコールやカルボキ
シメチルセルロースなどを水に加えてなる結着剤等を用
いてもよい。To form an electrode, the obtained metal porous body as a current collector is filled with an active material. In the case of an alkaline storage battery, for example, a mixture containing nickel hydroxide as a main component is used as the active material. Other components in the mixture include, for example, 3 to 15% by weight of cobalt, 1 to 5% by weight of cobalt hydroxide, and 1 to 5% by weight of zinc oxide. In addition, a binder or the like prepared by adding polyvinyl alcohol, carboxymethyl cellulose or the like to water may be used.
【００１１】形成された電極は、対極およびセパレータ
とともに電池を構成するため捲回される。本発明は、た
とえばニッケル−カドミウム電池、ニッケル−水素電池
などのアルカリ蓄電池の製造に適用される。The formed electrode, together with the counter electrode and the separator, is wound to form a battery. The present invention is applied to the production of alkaline storage batteries such as nickel-cadmium batteries and nickel-hydrogen batteries.
【００１２】[0012]
【発明の作用効果】図１（ａ）を参照して、本発明によ
れば、有機ポリマー繊維からなる不織布１の縦方向（Ｘ
方向）とそれに垂直な横方向（Ｙ方向）のいずれが高い
引張強度を有するか確認する。方向による引張強度の違
いは、不織布における繊維組織に起因するものである。
ここでＸ方向がＹ方向よりも引張強度が高いと仮定す
る。With reference to FIG. 1 (a), according to the present invention, the longitudinal direction (X
Direction) and the transverse direction (Y direction) perpendicular thereto have a higher tensile strength. The difference in tensile strength depending on the direction is due to the fiber structure in the nonwoven fabric.
Here, it is assumed that the X direction has higher tensile strength than the Y direction.
【００１３】本発明において不織布にはめっきが施され
る。めっきでは、不織布の繊維構造に沿ってめっき層が
形成される。めっき層による金属構造体は、不織布の繊
維構造を反映している。したがって、Ｘ方向がＹ方向よ
りも引張強度が高い不織布を用いた場合、図１（ｂ）に
示すように不織布上にめっきを施した状態において、め
っき層１０による構造体の引張強度もやはりＸ方向のほ
うがＹ方向よりも高くなる。In the present invention, the non-woven fabric is plated. In plating, a plating layer is formed along the fiber structure of the nonwoven fabric. The metal structure of the plated layer reflects the fiber structure of the non-woven fabric. Therefore, when a nonwoven fabric having a higher tensile strength in the X direction than in the Y direction is used, the tensile strength of the structure formed by the plating layer 10 is also X in the state in which the nonwoven fabric is plated as shown in FIG. 1B. The direction is higher than the Y direction.
【００１４】そして、めっきされた不織布を熱処理し、
不織布を分解除去して得られる金属多孔体１１も、不織
布の繊維組織を反映しており、Ｘ方向のほうがＹ方向よ
りも引張強度が高い（図１（ｃ）参照）。このような金
属多孔体に活物質を充填してなる電極を用いる場合、図
１（ｄ）に示すようにＸ方向とほぼ平行にこの電極２１
を他の部材（対極２２およびセパレータ２３）とともに
捲回すれば、捲回による張力に電極は十分耐えることが
でき、安定して電池２０を組立てることができる。一
方、Ｙ方向がＸ方向よりも高い引張強度を有する不織布
を用いる場合、Ｙ方向とほぼ平行な方向を電極の捲回方
向とすればよい。Then, the plated non-woven fabric is heat treated,
The porous metal body 11 obtained by decomposing and removing the nonwoven fabric also reflects the fiber structure of the nonwoven fabric, and the tensile strength in the X direction is higher than that in the Y direction (see FIG. 1 (c)). When an electrode formed by filling such a porous metal body with an active material is used, the electrode 21 is almost parallel to the X direction as shown in FIG.
When is wound with other members (counter electrode 22 and separator 23), the electrode can sufficiently withstand the tension caused by the winding, and the battery 20 can be stably assembled. On the other hand, when a nonwoven fabric having a tensile strength in the Y direction higher than that in the X direction is used, the direction substantially parallel to the Y direction may be set as the winding direction of the electrode.
【００１５】このように本発明は、金属多孔体を形成す
る際に用いる不織布の強度に着目するもので、不織布の
強度が反映した金属多孔体の捲回方向を、上述したよう
に設定することで、電極に関して亀裂等の発生は防止さ
れ、安定して電池を組立てることができる。本発明は、
電池の製造において歩留りの向上に寄与するものであ
る。As described above, the present invention focuses on the strength of the nonwoven fabric used for forming the porous metal body, and the winding direction of the porous metal body, which reflects the strength of the nonwoven fabric, is set as described above. Thus, the occurrence of cracks or the like on the electrodes is prevented, and the battery can be stably assembled. The present invention
This contributes to an improvement in yield in the production of batteries.
【００１６】[0016]
実施例１ 線径１８μｍのポリエステル繊維を乾式法でウェブと
し、エポキシエマルジョンに浸漬、乾燥、硬化させるこ
とにより、目付け６０ｇ／ｍ2 、厚み２．５ｍｍの不織
布を得た。得られた長方形の不織布において、横方向が
縦方向よりも引張強度が高いことを確認した。次に、不
織布に塩化パラジウムと塩化スズからなるコロイド触媒
を吸着させた。硫酸によってＳｎを除去し、触媒を活性
化した後、ニッケル無電解めっきを行なった。このとき
のめっき重量は２０ｇ／ｍ2 であった。次に、不織布上
に電気ニッケルめっきを施した。めっきが施された多孔
体を、十分に水洗、乾燥後、空気中において６００℃で
加熱し、不織布を熱分解除去した。ついで、水素を含む
還元性雰囲気において１０００℃で熱処理し、集電体と
しての金属不織布を得た。Example 1 A nonwoven fabric having a basis weight of 60 g / m 2 and a thickness of 2.5 mm was obtained by forming a polyester fiber having a wire diameter of 18 μm into a web by a dry method, immersing the web in an epoxy emulsion, drying and curing the web. In the obtained rectangular nonwoven fabric, it was confirmed that the transverse direction had higher tensile strength than the longitudinal direction. Next, a colloid catalyst composed of palladium chloride and tin chloride was adsorbed on the non-woven fabric. After removing Sn by sulfuric acid and activating the catalyst, nickel electroless plating was performed. The plating weight at this time was 20 g / m 2 . Next, electroless nickel plating was applied on the non-woven fabric. The plated porous body was thoroughly washed with water, dried, and then heated in air at 600 ° C. to thermally decompose and remove the nonwoven fabric. Then, heat treatment was performed at 1000 ° C. in a reducing atmosphere containing hydrogen to obtain a metal nonwoven fabric as a current collector.
【００１７】得られた金属不織布を矩形に切取り、電極
支持体として用いた。矩形の金属不織布において、対向
する１対の長辺は、用いたポリエステル繊維不織布の横
方向に対応した。金属不織布からなる電極支持体に、水
酸化ニッケルを主成分とするペースト状の活物質を充填
し、プレスしてアルカリ蓄電池用正極板得た。得られた
正極板と、水素吸蔵合金を用いる負極およびポリプロピ
レン不織布製セパレータとを一緒に捲回し、単３型ニッ
ケル−水素電池を作製した。正極は、金属不織布の作製
に用いたポリエステル繊維不織布の横方向に対応する１
対の辺とほぼ平行な方向に捲回された。The obtained metal nonwoven fabric was cut into a rectangular shape and used as an electrode support. In the rectangular metal nonwoven fabric, the pair of long sides facing each other corresponded to the lateral direction of the polyester fiber nonwoven fabric used. An electrode support made of a metallic nonwoven fabric was filled with a paste-like active material containing nickel hydroxide as a main component and pressed to obtain a positive electrode plate for an alkaline storage battery. The obtained positive electrode plate, a negative electrode using a hydrogen storage alloy, and a polypropylene nonwoven fabric separator were wound together to produce an AA-type nickel-hydrogen battery. The positive electrode corresponds to the lateral direction of the polyester fiber non-woven fabric used for producing the metal non-woven fabric 1
It was wound in a direction substantially parallel to the pair of sides.
【００１８】比較例１ ポリエステル繊維不織布の縦方向に対応する１対の辺と
ほぼ平行な方向に正極を捲回した以外は、実施例１と同
様にして電池を作製した。Comparative Example 1 A battery was produced in the same manner as in Example 1 except that the positive electrode was wound in a direction substantially parallel to a pair of sides corresponding to the longitudinal direction of the polyester fiber nonwoven fabric.
【００１９】実施例１および比較例１の結果、実施例１
では電池１００個中短絡はゼロであったが、比較例１で
は１００個中７個の短絡が生じた。As a result of Example 1 and Comparative Example 1, Example 1
In 100 of 100 batteries, no short circuit was found, but in Comparative Example 1, 7 of 100 batteries were short-circuited.
【図１】本発明に従うプロセスにおいて、不織布および
それに対応する金属多孔体における縦方向および横方向
を示す模式図である。FIG. 1 is a schematic view showing a longitudinal direction and a transverse direction in a nonwoven fabric and a metal porous body corresponding thereto in a process according to the present invention.
１ 不織布 1 non-woven fabric
───────────────────────────────────────────────────── フロントページの続き (72)発明者 細江 晃久 大阪市此花区島屋一丁目１番３号 住友電 気工業株式会社大阪製作所内 (72)発明者 花房 幸司 大阪市此花区島屋一丁目１番３号 住友電 気工業株式会社大阪製作所内 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Akihisa Hosoe 1-3-3 Shimaya, Konohana-ku, Osaka City Sumitomo Electric Industries, Ltd. Osaka Works (72) Inventor Koji Hanafusa 1-chome, Shimaya, Osaka No. 3 Sumitomo Electric Industries, Ltd. Osaka Works
Claims (1)
し、その縦方向とそれに垂直な横方向のいずれが高い引
張強度を有するか確認する工程と、 準備された不織布にめっきを施す工程と、 めっきされた不織布に熱処理を施して前記不織布を除去
した後、前記めっきによる金属多孔体を得る工程と、 得られた金属多孔体において、前記熱処理の前、前記不
織布の前記縦方向と前記横方向のうち前記引張強度の高
い方向に対応していた方向（以下Ａ方向とする）を決定
する工程と、 前記金属多孔体に活物質を充填し電極を形成する工程
と、 得られた電極と、さらに準備した対極およびセパレータ
とを前記Ａ方向とほぼ平行な方向に捲回して電池を構成
する工程とを備える、電池の製造方法。1. A step of preparing a non-woven fabric made of organic polymer fibers and confirming which of the longitudinal direction and the transverse direction perpendicular thereto has a high tensile strength, a step of plating the prepared non-woven fabric, and a plating step. A step of obtaining a porous metal body by plating after heat-treating the formed nonwoven fabric to remove the nonwoven fabric, and in the obtained porous metal body, before the heat treatment, in the longitudinal direction and the transverse direction of the nonwoven fabric. Among them, a step of determining a direction corresponding to the direction of high tensile strength (hereinafter referred to as A direction), a step of filling the metal porous body with an active material to form an electrode, the obtained electrode, and Winding the prepared counter electrode and the separator in a direction substantially parallel to the A direction to form a battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6206580A JPH0869814A (en) | 1994-08-31 | 1994-08-31 | Manufacture of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6206580A JPH0869814A (en) | 1994-08-31 | 1994-08-31 | Manufacture of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0869814A true JPH0869814A (en) | 1996-03-12 |
Family
ID=16525763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6206580A Withdrawn JPH0869814A (en) | 1994-08-31 | 1994-08-31 | Manufacture of battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0869814A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012185927A (en) * | 2011-03-03 | 2012-09-27 | Fdk Twicell Co Ltd | Method for manufacturing electrode core, method for manufacturing non-sintered nickel electrode, electrode core and non-sintered nickel electrode |
| WO2023177244A1 (en) * | 2022-03-16 | 2023-09-21 | 주식회사 엘지에너지솔루션 | Film for secondary battery dry electrode |
-
1994
- 1994-08-31 JP JP6206580A patent/JPH0869814A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012185927A (en) * | 2011-03-03 | 2012-09-27 | Fdk Twicell Co Ltd | Method for manufacturing electrode core, method for manufacturing non-sintered nickel electrode, electrode core and non-sintered nickel electrode |
| WO2023177244A1 (en) * | 2022-03-16 | 2023-09-21 | 주식회사 엘지에너지솔루션 | Film for secondary battery dry electrode |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20011106 |