JPH04248269A - Manufacture of sintered substrate for alkaline storage battery - Google Patents
Manufacture of sintered substrate for alkaline storage batteryInfo
- Publication number
- JPH04248269A JPH04248269A JP3023932A JP2393291A JPH04248269A JP H04248269 A JPH04248269 A JP H04248269A JP 3023932 A JP3023932 A JP 3023932A JP 2393291 A JP2393291 A JP 2393291A JP H04248269 A JPH04248269 A JP H04248269A
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- nickel powder
- sintered substrate
- microballoons
- sintered
- 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
- 239000000758 substrate Substances 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 238000003860 storage Methods 0.000 title claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000002002 slurry Substances 0.000 claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 239000011230 binding agent Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000005245 sintering Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 5
- 239000011148 porous material Substances 0.000 abstract description 12
- 238000001035 drying Methods 0.000 abstract description 3
- 239000002562 thickening agent Substances 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000000178 monomer Substances 0.000 abstract description 2
- 230000000379 polymerizing effect Effects 0.000 abstract description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000002794 monomerizing effect Effects 0.000 abstract 1
- 239000000088 plastic resin Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 26
- 230000000052 comparative effect Effects 0.000 description 15
- 239000011149 active material Substances 0.000 description 14
- 238000003756 stirring Methods 0.000 description 13
- 238000007747 plating Methods 0.000 description 10
- 238000005470 impregnation Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- XIEPJMXMMWZAAV-UHFFFAOYSA-N cadmium nitrate Inorganic materials [Cd+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XIEPJMXMMWZAAV-UHFFFAOYSA-N 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- NMHMNPHRMNGLLB-UHFFFAOYSA-N phloretic acid Chemical compound OC(=O)CCC1=CC=C(O)C=C1 NMHMNPHRMNGLLB-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、アルカリ蓄電池の極板
に活物質保持体として用いられる焼結基板の製造方法に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a sintered substrate used as an active material holder for electrode plates of alkaline storage batteries.
【０００２】0002
【従来の技術】従来よりアルカリ蓄電地用焼結基板は、
スラリーを金属支持体に塗着し、乾燥した後、７００〜
１０００℃で焼結して製造されている。スラリーには、
ニッケルパウダーと、水と、バインダーとが混合される
。焼結工程において、ニッケル粉末は互いに焼結される
。また、ニッケル粉末と金属支持体も結合される。スラ
リーに添加された有機バインダーは、焼結工程において
分解して消失される。この製法で作成された焼結基板は
無数の空隙を有する多孔質となる。多孔質焼結基板の空
隙には、硝酸ニッケルや硝酸カドミウム等の活物質の塩
溶液を含液する。その後、硝酸ニッケルや硝酸カドミウ
ムを、ニッケルまたはカドミウムの水酸化物または酸化
物に変化させることにより、活物質を保持した電極とす
る。[Prior art] Conventionally, sintered substrates for alkaline power storage
After applying the slurry to a metal support and drying it,
Manufactured by sintering at 1000°C. In the slurry,
Nickel powder, water, and binder are mixed. In the sintering process, the nickel powders are sintered together. The nickel powder and metal support are also combined. The organic binder added to the slurry decomposes and disappears during the sintering process. The sintered substrate created by this manufacturing method becomes porous with countless voids. The voids of the porous sintered substrate are filled with a salt solution of an active material such as nickel nitrate or cadmium nitrate. Thereafter, nickel nitrate or cadmium nitrate is changed into a hydroxide or oxide of nickel or cadmium, thereby forming an electrode holding an active material.
【０００３】上述したこの製法によると、焼結基板の多
孔度は７５〜８０％となる。焼結基板の多孔度は、活物
質の保持量を規制する。多孔度を高くできるなら、活物
質の保持量を増加できる。活物質の保持量を増加させ、
極板の高容量をはかるために、焼結基板の多孔度を増加
させることが大切である。このことを実現するために、
種々の製法が提案されている。According to this manufacturing method described above, the porosity of the sintered substrate is 75 to 80%. The porosity of the sintered substrate regulates the amount of active material retained. If the porosity can be increased, the amount of active material retained can be increased. Increases the amount of active material retained,
In order to achieve high capacity of the electrode plate, it is important to increase the porosity of the sintered substrate. To achieve this,
Various manufacturing methods have been proposed.
【０００４】特開昭５８−６６２６７号公報には、焼結
基板の多孔度を増加させる方法が記載されている。この
公報に記載される製法は、スラリーにマイクロバルーン
を添加して多孔質な状態に焼結している。この方法は、
ニッケル粉末とバインダーとからなるスラリーに、造孔
剤としての有機高分子樹脂のマイクロバルーンを混和し
、これを金属支持体に塗着した後焼結している。焼結工
程において、マイクロバルーンが消失し、その部分に空
隙ができて多孔質の焼結基板となる。JP-A-58-66267 describes a method for increasing the porosity of a sintered substrate. In the manufacturing method described in this publication, microballoons are added to slurry and sintered into a porous state. This method is
Microballoons made of organic polymer resin as a pore-forming agent are mixed into a slurry consisting of nickel powder and a binder, and this is applied to a metal support and then sintered. In the sintering process, the microballoons disappear and voids are created in the replaced areas, resulting in a porous sintered substrate.
【０００５】この方法は、マイクロバルーンを造孔剤と
して使用するので、発泡させて多孔質とする方法に比較
して、気孔率を高く、また、強度を改善できる。しかし
ながら、マイクロバルーンは、スラリーに均一に混和す
るのが難しい欠点がある。それは、マイクロバルーンの
比重が、ニッケルパウダーに対してあまりにも小さいこ
とが理由である。このため、マイクロバルーンの周囲に
、ニッケルパウダーを均一に分散させてからませるのに
時間がかかる。このことは、ニッケルパウダーとマイク
ロバルーンとを混練する時に、ニッケルパウダーのチェ
ーンを壊して気孔率を低下させる。それは、混和時間が
長すぎるからである。ニッケルパウダーは、通常、チェ
ーン状につながっているが、混練時間が長くなると、バ
ラバラに壊れる物性がある。さらにまた、軽いマイクロ
バルーンは、静置すると浮上して分離し易く、放置時に
も遂時かくはんする必要がある。このため、この公報に
記載される焼結基板の製造方法は、気孔径が不均一とな
りやすく、また、基板は部分的に強度むらができる欠点
がある。[0005] Since this method uses microballoons as a pore-forming agent, the porosity can be increased and the strength can be improved compared to the method of foaming to make the material porous. However, microballoons have the disadvantage that they are difficult to mix uniformly into slurry. This is because the specific gravity of microballoons is much lower than that of nickel powder. Therefore, it takes time to uniformly disperse and entangle the nickel powder around the microballoon. This causes the nickel powder chains to break and the porosity to decrease when nickel powder and microballoons are kneaded. This is because the mixing time is too long. Nickel powder is usually connected in the form of a chain, but it has the physical property of breaking into pieces if the kneading time is too long. Furthermore, light microballoons tend to float and separate when left still, and require constant stirring even when left standing. For this reason, the method for manufacturing a sintered substrate described in this publication has the drawback that the pore diameter tends to be non-uniform and the strength of the substrate is partially uneven.
【０００６】これらの欠点を解消する方法が、特開昭６
１−３４８６１号公報に記載されている。この公報には
、金属メッキを施したマイクロバルーンを使用して焼結
基板を製造する方法が提案されている。この方法は、焼
結工程において、金属メッキで被覆されたマイクロバル
ーンを消失し、マイクロバルーンのあった部分を空隙と
して焼結基板の気孔率を高くする。焼結工程において、
金属メッキで被覆されたマイクロバルーンは、ガスとな
って焼結基板から消失される。ガス化したマイクロバル
ーンは、金属メッキの極めて微細な隙間から消失される
。[0006] A method to eliminate these drawbacks was disclosed in Japanese Patent Application Laid-open No. 6
It is described in Japanese Patent No. 1-34861. This publication proposes a method of manufacturing a sintered substrate using metal-plated microballoons. In this method, the microballoons covered with metal plating disappear during the sintering process, and the portions where the microballoons used to be are used as voids to increase the porosity of the sintered substrate. In the sintering process,
The microballoons coated with metal plating become gas and disappear from the sintered substrate. The gasified microballoons disappear through extremely fine gaps in the metal plating.
【０００７】[0007]
【発明が解決しようとする課題】この方法は、マイクロ
バルーンによって無数の微細な孔を形成できる。ただ、
この方法で作られた気孔は、表面に薄膜の金属メッキ層
がある。いいかえると、気孔は金属メッキ層で囲まれた
状態となっている。気孔を囲む金属メッキは、内部に活
物質が浸透するのを制限する。それは、気孔を囲む金属
メッキが、ガスを透過できても、粘性のある含浸液を自
由に透過できないからである。このため、気孔がデット
スペースとなり、かえって高容量化に対しては不利とな
る。[Problems to be Solved by the Invention] This method allows the formation of countless fine holes using microballoons. just,
The pores created using this method have a thin metal plating layer on their surface. In other words, the pores are surrounded by a metal plating layer. The metal plating surrounding the pores limits the penetration of active material inside. This is because, although the metal plating surrounding the pores can permeate gas, it cannot freely permeate the viscous impregnating liquid. Therefore, the pores become dead spaces, which is rather disadvantageous for increasing the capacity.
【０００８】電池の高容量化を図るには、極板の高容量
化が必要である。極板の高容量化を達成するには、単位
体積当りの活物質量の多い極板の製造手法が不可決であ
る。具体的には、焼結基板自体を、より多孔質なものに
することが必要であり、９０％程度の気孔率が要求され
る。[0008] In order to increase the capacity of batteries, it is necessary to increase the capacity of the electrode plates. In order to achieve a high capacity of the electrode plate, a method of manufacturing the electrode plate with a large amount of active material per unit volume is unreliable. Specifically, it is necessary to make the sintered substrate itself more porous, and a porosity of about 90% is required.
【０００９】さらに、焼結基板には、高い気孔率に加え
て、充分な強度が要求される。脆い焼結基板は、製造過
程において変形あるいは崩壊し、さらに、巻き取り工程
において、一部が脱落する等の欠点がある。Furthermore, the sintered substrate is required to have sufficient strength in addition to high porosity. The brittle sintered substrate has drawbacks such as deformation or collapse during the manufacturing process, and furthermore, parts falling off during the winding process.
【００１０】この発明は、従来のこれ等の欠点を解決す
ることを目的に開発されたもので、この発明の重要な目
的は、気孔率を高くして強靱にでき、さらに、気孔を均
一に分散できるアルカリ蓄電池用焼結基板の製造方法を
提供するにある。[0010] This invention was developed with the aim of solving these conventional drawbacks, and an important purpose of this invention is to increase the porosity and make it tough, and furthermore, to make the pores uniform. An object of the present invention is to provide a method for manufacturing a sintered substrate for an alkaline storage battery that can be dispersed.
【００１１】[0011]
【課題を解決する為の手段】この発明は、前述の目的を
達成するために、下記の工程でアルカリ蓄電池用焼結基
板を製造する。表面にニッケルパウダーをコーティング
した１０μ以上の粒径を有する有機中空球体と、ニッケ
ルパウダーと、水及びバインダーとを混合してスラリー
とする。このスラリーを、金属支持体に塗着、乾燥した
後、焼結する。[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention manufactures a sintered substrate for an alkaline storage battery through the following steps. A slurry is prepared by mixing organic hollow spheres having a particle size of 10 μm or more whose surfaces are coated with nickel powder, nickel powder, water, and a binder. This slurry is applied to a metal support, dried, and then sintered.
【００１２】有機中空球体の表面にカーボニルニッケル
粉末をコーティングするには、バインダーにより塗着す
る方法、静電的に付着してコーティングする等の方法が
利用できる。[0012] In order to coat the surface of the organic hollow spheres with carbonyl nickel powder, methods such as applying with a binder, electrostatically adhering and coating, etc. can be used.
【００１３】ニッケルパウダーには、平均粒径が３０μ
程度のものが適当である。ただし、ニッケルパウダーは
、チェーン構造であるため長径を粒径として測定した。
ニッケルパウダーを有機中空球体に充分にからまるため
には、有機中空球体の粒径は１０μ以上とするのがよい
。[0013] Nickel powder has an average particle size of 30 μm.
A moderate amount is appropriate. However, since the nickel powder has a chain structure, the major axis was measured as the particle size. In order to sufficiently entangle the nickel powder in the organic hollow spheres, the particle size of the organic hollow spheres is preferably 10 μm or more.
【００１４】[0014]
【実施例】以下、この発明の実施例を説明する。但し、
以下に示す実施例は、この発明の技術思想を具体化する
為の製法を例示すものであって、この発明の方法は、製
造条件や使用材料を下記のものに特定するものでない。
この発明の方法は、特許請求の範囲において、種々の変
更を加えることができる。[Embodiments] Examples of the present invention will be described below. however,
The examples shown below are illustrative of manufacturing methods for embodying the technical idea of the present invention, and the method of the present invention does not specify the manufacturing conditions or materials used as described below. The method of this invention can be modified in various ways within the scope of the claims.
【００１５】［実施例１］■ マイクロバルーンの表
面に、カーボニルニッケル粉末をコーティングする。マ
イクロバルーンは、熱可塑性樹脂モノマー（ポリメチル
メタアクリレートとアクリロントリル１：１の共重合体
）に、液化ガスを分散懸濁させて、加熱、加圧下で重合
して製造する。■ カーボニルニッケル粉末でコーテ
ィングしたマイクロバルーン５部（有機物量として）に
対して、カーボニルニッケル粉末４７部（マイクロバル
ーンの表面のニッケル分も含む）と、増粘剤として３％
のカルボキシメチルセルローズ４７部とを混合する。■
ニーダーを使用して、１０分かくはんしてスラリー
を作成する。■ その後、スラリーの溶液中に金属支
持体を通して、表面にスラリーを塗着し、スリットに通
して、厚み調整を行う。■ 金属支持体の表面に塗布
されたスラリーを乾燥し、５００〜６００℃で５分間加
熱して、有機成分を分解して除去した後、９００℃の還
元雰囲気中で１０分間焼結して焼結基板とする。[Example 1] ■ The surface of a microballoon is coated with carbonyl nickel powder. Microballoons are manufactured by dispersing and suspending liquefied gas in a thermoplastic resin monomer (a 1:1 copolymer of polymethyl methacrylate and acrylontrile) and polymerizing the mixture under heat and pressure. ■ 47 parts of carbonyl nickel powder (including the nickel on the surface of the microballoon) and 3% thickener for 5 parts of microballoon coated with carbonyl nickel powder (as the amount of organic matter)
and 47 parts of carboxymethyl cellulose. ■
Using a kneader, stir for 10 minutes to create a slurry. (2) Thereafter, the metal support is passed through the slurry solution, the slurry is applied to the surface, and the thickness is adjusted by passing it through a slit. ■ Dry the slurry applied to the surface of the metal support, heat it at 500 to 600°C for 5 minutes to decompose and remove organic components, and then sinter it in a reducing atmosphere at 900°C for 10 minutes. Use as a bonding board.
【００１６】［実施例２］スラリーのかくはん時間を１
０分から３０分とする以外、実施例１と同様にして、焼
結基板を製作する。[Example 2] Slurry stirring time was 1
A sintered substrate is manufactured in the same manner as in Example 1 except that the time is changed from 0 minutes to 30 minutes.
【００１７】［実施例３］スラリーのかくはん時間を１
０分から６０分とする以外、実施例１と同様にして、焼
結基板を製作する。実施例１で得られた焼結基板の優れ
た特性を明示するために、下記の工程で比較例１〜４の
焼結基板を試作した。[Example 3] Slurry stirring time was 1
A sintered substrate is manufactured in the same manner as in Example 1 except that the time is changed from 0 minutes to 60 minutes. In order to clearly demonstrate the excellent properties of the sintered substrate obtained in Example 1, sintered substrates of Comparative Examples 1 to 4 were prototyped using the following steps.
【００１８】［比較例１］実施例１に使用したマイクロ
バルーンであって、ニッケル粉末を付着しないマイクロ
バルーン５部に対して、カーボニルニッケル粉末４７部
、増粘剤として３％のカルボキシメチルセルローズ４７
部を混合し、ニーダーにて１０分かくはんしてスラリー
を作成する。その後の工程は、実施例１と同様にして焼
結基板を製作した。[Comparative Example 1] For 5 parts of the microballoon used in Example 1 to which no nickel powder was attached, 47 parts of carbonyl nickel powder and 3% carboxymethyl cellulose 47 as a thickener were added.
A slurry is prepared by mixing the two parts and stirring in a kneader for 10 minutes. The subsequent steps were the same as in Example 1 to produce a sintered substrate.
【００１９】［比較例２］スラリーのかくはん時間を１
０分から３０分とする以外、比較例１と同様にして、焼
結基板を製作する。[Comparative Example 2] Slurry stirring time was 1
A sintered substrate is produced in the same manner as Comparative Example 1 except that the time is changed from 0 minutes to 30 minutes.
【００２０】［比較例３］スラリーのかくはん時間を１
０分から６０分とする以外、比較例１と同様にして、焼
結基板を製作する。[Comparative Example 3] Slurry stirring time was 1
A sintered substrate is manufactured in the same manner as Comparative Example 1 except that the time is changed from 0 minutes to 60 minutes.
【００２１】［比較例４］スラリーのかくはん時間を１
０分から１２０分とする以外、比較例１と同様にして、
焼結基板を製作する。[Comparative Example 4] Slurry stirring time 1
In the same manner as Comparative Example 1 except that the time was from 0 minutes to 120 minutes,
Manufacture a sintered substrate.
【００２２】［比較例５］ニッケルメッキをしたマイク
ロバルーンを使用すると共に、スラリーのかくはん時間
を１０分から６０分とする以外、比較例１と同様にして
、焼結基板を製作する。ニッケルメッキ量は、実施例１
のマイクロバルーンにコーティングした量と同量とした
。[Comparative Example 5] A sintered substrate was produced in the same manner as in Comparative Example 1, except that nickel-plated microballoons were used and the slurry was stirred for 10 to 60 minutes. The amount of nickel plating is as shown in Example 1.
The amount was the same as the amount coated on the microballoon.
【００２３】上記の方法で得られた焼結基板の多孔度と
、三点強度とを測定した。三点強度は１０カ所の平均値
とした。測定結果を表１に示す。The porosity and three-point strength of the sintered substrate obtained by the above method were measured. The three-point strength was the average value of 10 locations. The measurement results are shown in Table 1.
【００２４】[0024]
【発明の効果】表１は、本発明の方法で製造した焼結基
板が、充分な強度を有することを明示している。とくに
、スラリーのかくはん時間を著しく短くして、充分な強
度を持たせることができる。このように、短時間のスラ
リーかくはんで焼結基板を強靱にできるのは、簡単にマ
イクロバルーンを均一分散できるからである。実施例１
で得られた焼結基板は、スラリーのかくはん時間を１０
分と、きわめて短時間として、三点強度のバラツキを極
めて少なくできる。とくに製造工程で問題となる最小強
度を、０．９４ｋｇ／ｍｍ２と相当に強くできる特長が
ある。ちなみに、スラリーのかくはん時間を同じとする
比較例１の焼結基板は、最小強度が０．５０ｋｇ／ｍｍ
２と、本発明品の約半分になる。[Effects of the Invention] Table 1 clearly shows that the sintered substrate produced by the method of the present invention has sufficient strength. In particular, the slurry can be stirred for a significantly shorter time to provide sufficient strength. The reason why the sintered substrate can be made tough by stirring the slurry for a short time is that the microballoons can be easily and uniformly dispersed. Example 1
The sintered substrate obtained by the slurry stirring time was 10
In an extremely short period of time (minutes), variations in the strength at three points can be extremely reduced. In particular, it has the advantage of being able to significantly increase the minimum strength, which is a problem in the manufacturing process, to 0.94 kg/mm2. By the way, the sintered substrate of Comparative Example 1 in which the slurry was stirred for the same time had a minimum strength of 0.50 kg/mm.
2, which is about half that of the product of the present invention.
【００２５】このように、この発明の方法は、短時間の
かくはんで、増孔剤であるマイクロバルーンを均一に分
散できるので、気孔率を高くして、強度のバラツキを少
なくでき、さらに、気孔径を均一にできる特長がある。[0025] As described above, the method of the present invention can uniformly disperse the microballoons as a pore-forming agent by stirring for a short time, thereby increasing the porosity and reducing variations in strength. It has the advantage of making the pore diameter uniform.
【００２６】本発明の方法に対して、従来の方法で製造
された比較例は、かくはん時間を６０分以下とすると、
三点強度のバラツキが大きく、特に最小強度が弱くなる
欠点がある。さらに、マイクロバルーンを均一に分散さ
せるために、かくはん時間を１２０分と長くすると、ニ
ッケルパウダーのチェーンが破壊されて強度が低下し、
さらに、気孔率も低下してしまう欠点がある。In contrast to the method of the present invention, in the comparative example manufactured by the conventional method, when the stirring time was 60 minutes or less,
The disadvantage is that the three-point strength varies widely, and the minimum strength is particularly weak. Furthermore, in order to uniformly disperse the microballoons, if the stirring time was increased to 120 minutes, the nickel powder chains would be broken and the strength would decrease.
Furthermore, there is a drawback that the porosity also decreases.
【００２７】[0027]
【表１】[Table 1]
【００２８】さらに、実施例２と、比較例２および５で
試作した焼結基板に、化学含浸を６回行い、含浸率と、
極板の利用率とを測定した。測定結果を表２に示してい
る。この表に示すように、この発明の方法で製造した実
施例２の焼結基板は、活物質の含浸率が高く、また、利
用率も高くできる特長がある。これに対して、比較例２
の焼結基板は、利用率が著しく低くなる欠点がある。そ
れは、気孔径のバラツキが大きく、部分的に導電度が低
下してくることが理由である。Furthermore, the sintered substrates prototyped in Example 2 and Comparative Examples 2 and 5 were chemically impregnated six times, and the impregnation rate and
The utilization rate of the electrode plate was measured. The measurement results are shown in Table 2. As shown in this table, the sintered substrate of Example 2 manufactured by the method of the present invention has the advantage of having a high impregnation rate of the active material and a high utilization rate. On the other hand, comparative example 2
The disadvantage of this sintered substrate is that its utilization rate is extremely low. The reason for this is that the pore diameter varies widely and the conductivity decreases in some areas.
【００２９】また、この発明の方法で製造された実施例
２の焼結基板に比較すると、比較例５の焼結基板は、活
物質の含浸率が低下する。それは、金属メッキに被覆さ
れる気孔がデッドスペースとなり、活物質が充填されな
いことが理由である。これに対して、この発明で製造し
た焼結基板は、有機中空球体の表面に、金属メッキにか
わって、ニッケルパウダーを付着することによって、活
物質の含浸率を著しく増加できる特長がある。Furthermore, compared to the sintered substrate of Example 2 manufactured by the method of the present invention, the sintered substrate of Comparative Example 5 has a lower impregnation rate of the active material. This is because the pores covered by the metal plating become dead spaces and are not filled with active material. On the other hand, the sintered substrate manufactured according to the present invention has the feature that the impregnation rate of the active material can be significantly increased by attaching nickel powder to the surface of the organic hollow sphere instead of metal plating.
【００３０】[0030]
【表２】[Table 2]
【００３１】ただし、この表において、「※１の含浸率
」は、基板の空間体積当りの活物質充填量を示し、「※
２の利用率」は、０．１Ｃ×１６時間で充電し、１／３
Ｃで放電した時の、実容量／理論容量×１００で計算し
た数値である。However, in this table, "*1 impregnation rate" indicates the amount of active material filled per space volume of the substrate, and "*1 impregnation rate" indicates the amount of active material filled per space volume of the substrate.
The usage rate of 2 is 1/3 when charged at 0.1C x 16 hours.
This is a value calculated by multiplying the actual capacity/theoretical capacity by 100 when discharging at C.
Claims (1)
グした１０μ以上の粒径を有する有機中空球体と、ニッ
ケルパウダーと、水及びバインダーとを混合してなるス
ラリーを、金属支持体に塗着、乾燥した後、焼結するこ
とを特徴とするアルカリ蓄電池用焼結基板の製造方法。Claim 1: A slurry made by mixing organic hollow spheres having a particle size of 10μ or more coated with nickel powder on the surface, nickel powder, water, and a binder is applied to a metal support and dried. A method for producing a sintered substrate for an alkaline storage battery, characterized by sintering the substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3023932A JPH04248269A (en) | 1991-01-23 | 1991-01-23 | Manufacture of sintered substrate for alkaline storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3023932A JPH04248269A (en) | 1991-01-23 | 1991-01-23 | Manufacture of sintered substrate for alkaline storage battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04248269A true JPH04248269A (en) | 1992-09-03 |
Family
ID=12124305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3023932A Pending JPH04248269A (en) | 1991-01-23 | 1991-01-23 | Manufacture of sintered substrate for alkaline storage battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04248269A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6824925B2 (en) | 2001-07-10 | 2004-11-30 | Matsushita Electric Industrial Co., Ltd. | Method for manufacturing base for electrode plate, method for manufacturing positive electrode plate and alkaline storage battery |
| US7306753B2 (en) | 1999-12-29 | 2007-12-11 | Gkn Sinter Metals Gmbh | Method of making a thin porous layer |
| JP4588288B2 (en) * | 2001-07-10 | 2010-11-24 | パナソニック株式会社 | Method for manufacturing substrate for electrode plate, method for manufacturing positive electrode plate, and alkaline storage battery |
| US7976986B2 (en) | 2007-03-31 | 2011-07-12 | Sanyo Electric Co., Ltd. | Sintered substrate and alkaline storage battery using the substrate |
| CN108817403A (en) * | 2018-06-28 | 2018-11-16 | 西北工业大学 | A kind of preparation method of nuclear battery transom porous platinum ventail |
-
1991
- 1991-01-23 JP JP3023932A patent/JPH04248269A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7306753B2 (en) | 1999-12-29 | 2007-12-11 | Gkn Sinter Metals Gmbh | Method of making a thin porous layer |
| US6824925B2 (en) | 2001-07-10 | 2004-11-30 | Matsushita Electric Industrial Co., Ltd. | Method for manufacturing base for electrode plate, method for manufacturing positive electrode plate and alkaline storage battery |
| JP4588288B2 (en) * | 2001-07-10 | 2010-11-24 | パナソニック株式会社 | Method for manufacturing substrate for electrode plate, method for manufacturing positive electrode plate, and alkaline storage battery |
| US7976986B2 (en) | 2007-03-31 | 2011-07-12 | Sanyo Electric Co., Ltd. | Sintered substrate and alkaline storage battery using the substrate |
| CN108817403A (en) * | 2018-06-28 | 2018-11-16 | 西北工业大学 | A kind of preparation method of nuclear battery transom porous platinum ventail |
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