JPS6266573A - Manufacture of plate for alkaline storage battery - Google Patents
Manufacture of plate for alkaline storage batteryInfo
- Publication number
- JPS6266573A JPS6266573A JP60207369A JP20736985A JPS6266573A JP S6266573 A JPS6266573 A JP S6266573A JP 60207369 A JP60207369 A JP 60207369A JP 20736985 A JP20736985 A JP 20736985A JP S6266573 A JPS6266573 A JP S6266573A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- sintering
- active material
- pores
- porous body
- 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
- 238000003860 storage Methods 0.000 title claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 239000000758 substrate Substances 0.000 claims abstract description 45
- 239000011149 active material Substances 0.000 claims abstract description 34
- 238000005245 sintering Methods 0.000 claims abstract description 28
- 239000011148 porous material Substances 0.000 claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 230000003647 oxidation Effects 0.000 abstract description 10
- 238000007254 oxidation reaction Methods 0.000 abstract description 10
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 22
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 15
- 239000007788 liquid Substances 0.000 description 7
- 229910052759 nickel Inorganic materials 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 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
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/80—Porous plates, e.g. sintered carriers
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明はアルカリ蓄電池用極板の製造方法に関し、詳
しくは、ニッケル・カドミウム蓄電池の如きアルカリ蓄
電池に用いられる陽射るいは陰極板の製造方法に関する
ものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for manufacturing electrode plates for alkaline storage batteries, and more specifically, a method for manufacturing solar or cathode plates used in alkaline storage batteries such as nickel-cadmium storage batteries. It is related to.
〈従来の技術〉
上記のようなアルカリ蓄電池に用いる極板としては、カ
ーボニルニッケル粉末を焼結して得た多孔性の基板に、
真空含浸により活物質を含浸し充填する焼結式製法によ
り作られたものが広く用いられている。ところが、この
ような焼結式極板は、放電性能並びにサイクル特性等の
多くの面で優れているものの、高価なカーボニルニッケ
ル粉末を多量に使用するので原料コス１〜が高く、また
活物質含浸作業が複雑且つ長時間を要する等の欠点があ
り、近年、工程の合理化やロス１−低減等のため、非焼
結式製法が検討されている。その一つとして、スポンジ
状金属体や金属繊維マット焼結体のような、三次元的に
連続した空孔を有する金属多孔体（以下「三次元網状構
造金属多孔体」という）を基板として用い、この基板に
活物質を保持させる方法が提案されている。このような
方法は、焼結式製法に較べて製造工程が簡単であり、製
造時間が短くて済み、また原料コストが安価で必り、れ
数工程が合理化されて製造コスト低減化が図れるだけで
なく、得られる極板を焼結式極板より高エネルギー密度
のものとすることができるという特長がある。<Prior art> As the electrode plates used in the above-mentioned alkaline storage batteries, a porous substrate obtained by sintering carbonyl nickel powder is used.
Those made by a sintering method in which active materials are impregnated and filled by vacuum impregnation are widely used. However, although such sintered electrode plates are excellent in many aspects such as discharge performance and cycle characteristics, they use a large amount of expensive carbonyl nickel powder, resulting in a high raw material cost, and they also require active material impregnation. There are disadvantages such as complicated and time-consuming work, and in recent years, non-sintering manufacturing methods have been studied in order to rationalize the process and reduce loss. One of the methods is to use a porous metal body with three-dimensionally continuous pores (hereinafter referred to as "three-dimensional network structure porous metal body"), such as a sponge-like metal body or a sintered metal fiber mat, as a substrate. , a method of holding an active material on this substrate has been proposed. Compared to the sintering method, this method has a simpler manufacturing process, shorter manufacturing time, and lower raw material costs, which streamlines several steps and reduces manufacturing costs. However, it has the advantage that the resulting electrode plate can have a higher energy density than a sintered electrode plate.
このような三次元網状構造金属多孔体を基板として用い
るアルカリ蓄電池用極板の製造方法として、本出願人は
、特開昭５９−１３２５６４号公報に開示したように、
三次元網状構造金属多孔体からなる基板に予め所定の液
体を含浸させておき、次いで乾燥状態の活物質粉末を少
量ずつ上方から基板表面に落下させ、活物質粉末を沈降
により基板空孔内に充填し、活物質粉末に基板空孔内の
液体を吸液させて空孔内に固定する方法を提案した。こ
のような方法によれば、工程合理化により製造設備の簡
易化を図れることは勿論、基板空孔内に活物質をかなり
の高密度に充填できることは上記公報に記載した通りで
ある。As a method for manufacturing an electrode plate for an alkaline storage battery using such a three-dimensional network structure metal porous body as a substrate, the present applicant has disclosed in Japanese Patent Application Laid-Open No. 132564/1982,
A substrate made of a three-dimensional network metal porous material is impregnated with a predetermined liquid in advance, and then dry active material powder is dropped little by little onto the surface of the substrate from above, causing the active material powder to settle into the pores of the substrate. We proposed a method of filling the active material powder with liquid in the pores of the substrate and fixing it in the pores by absorbing the liquid. As described in the above-mentioned publication, according to such a method, it is possible not only to simplify the manufacturing equipment by streamlining the process, but also to fill the pores of the substrate with the active material at a considerably high density.
〈発明が解決しようとする問題点〉
しかしながら、本発明者の検討によれば、上記のように
活物質粉末を三次元網状構造金属多孔体からなる基板に
直接充填する方法を用いた場合には、基板毎あるいは同
一基板内における活物質充填量にバラツキが生じ易く、
充填性を均一なものとできないという問題点があること
がわかった。<Problems to be Solved by the Invention> However, according to the studies of the present inventors, when using the method of directly filling the active material powder into a substrate made of a three-dimensional network structure metal porous body as described above, , variations tend to occur in the amount of active material filled between substrates or within the same substrate,
It was found that there was a problem in that the filling properties could not be made uniform.
〈問題点を解決するための手段〉
本発明者は、上記のような充填量のバラツキの原因につ
いて調査した結果、基板表面の酸化度の大きなものが活
物質充填口が少なく且つ同一基板内における充ｆＸｆｆ
ｉのバラツキが大きいことを見出した。また、基板表面
の酸化度を左右する要因としては、例えば、基板の製造
最終工程において、焼結炉から取出ず際の基板の冷却程
度（温度）が挙げられ、取出し温度が高温になる程基板
表面の酸化度は上がる。そして、本発明者の研究によれ
ば、取出し温度を１４０°Ｃ以下、好ましくは１００
℃以下で行なうことにより、基板表面の酸化度を活物質
の均−且つ多量の充填が可能な程度に抑えることができ
ることがわかり、この発明を完成するに至った。<Means for Solving the Problems> As a result of investigating the causes of the above-mentioned variations in filling amount, the present inventor found that substrates with a high degree of oxidation on the surface have fewer active material filling ports and Full fXff
It was found that there was a large variation in i. In addition, factors that influence the degree of oxidation on the substrate surface include, for example, the degree of cooling (temperature) of the substrate before taking it out from the sintering furnace in the final process of manufacturing the substrate; The degree of oxidation on the surface increases. According to the research of the present inventor, the take-out temperature is 140°C or less, preferably 100°C or less.
It has been found that by carrying out the oxidation at a temperature below .degree. C., the degree of oxidation on the substrate surface can be suppressed to a level that allows even and large amounts of active material to be filled, leading to the completion of this invention.
即ち、この発明のアルカリ蓄電池用極板の製造方法は、
還元雰囲気あるいは真空の焼結炉中で焼結処理して三次
元的に連続した空孔を有する金属多孔体を形成し、焼結
１多焼結炉中で１４０°Ｃ以下まで温度を下げて冷却し
た１身、前記金属多孔体を焼結炉から取出し、この金属
多孔体を基板として前記空孔中に活物質粉末を充填する
ことを要旨とする。That is, the method for manufacturing an electrode plate for an alkaline storage battery of the present invention is as follows:
A metal porous body having three-dimensionally continuous pores is formed by sintering in a reducing atmosphere or vacuum sintering furnace, and the temperature is lowered to 140°C or less in a multi-sintering furnace. The gist of the method is to take out the cooled porous metal body from the sintering furnace, use the porous metal body as a substrate, and fill the pores with active material powder.
〈作 用〉
活物質粉末を基板に直接充填する方法としては、基板に
液体を含有させた後活物質粉末を充填する方法や、液体
、糊料及び活物質粉末からなるペーストを基板に充填す
る方法があり、前記液体としてはコス１〜、作業性等の
点から通常水が用いられるが、基板表面の酸化度が人ぎ
い場合には、基板表面の水との親和性が低下しくつまり
濡れにくくなり）、何れの方法に於いても基板空孔内に
活物質粉末を均一に保持することができない。特に基板
に水を含有させた後活物質粉末を充填する方法では、こ
の影響が顕著に表われ基板空孔内に水を均一に保持でき
なくなり、且つ一旦取り込んだ水が簡単に放出される状
態となるため、活物質粉末を均一に保持することはより
困難である。従って、上記本発明の製造方法によって基
板表面の酸化度を低く抑えることにより、基板表面の親
和性を改善すると、常に均−且つ多量の活物質充填が行
なえるようになる。<Function> Methods of directly filling the substrate with active material powder include a method of filling the substrate with liquid and then filling the active material powder, and a method of filling the substrate with a paste consisting of the liquid, glue, and active material powder. Water is usually used as the liquid from the viewpoint of cost 1~, workability, etc. However, if the degree of oxidation of the substrate surface is too high, the affinity of the substrate surface with water decreases, resulting in clogging and wetting. In either method, the active material powder cannot be held uniformly within the pores of the substrate. In particular, in the method of filling the active material powder after containing water in the substrate, this effect is noticeable, and water cannot be held uniformly in the pores of the substrate, and the water that has been taken in is easily released. Therefore, it is more difficult to maintain the active material powder uniformly. Therefore, if the compatibility of the substrate surface is improved by suppressing the degree of oxidation of the substrate surface by the manufacturing method of the present invention, uniform and large amounts of active material can be filled at all times.
〈実施例〉
繊維径３０１ＩｌｌＩ１１繊維長４Ｑｍｍのニッケル繊
維をマット状に成形した俊、このニッケル繊維マットを
焼結炉中で還元雰囲気中で焼結し、焼結後に１００℃ま
で冷却して焼結炉より取出した。<Example> Nickel fibers with a fiber diameter of 301IllI11 and a fiber length of 4Qmm were formed into a mat shape. This nickel fiber mat was sintered in a reducing atmosphere in a sintering furnace, and after sintering, it was cooled to 100°C and sintered. It was taken out from the furnace.
このようにして得た三次元網状構造金属多孔体を基板と
し、この基板をフッ素樹脂ディスパージョン中に浸漬し
含液させた後に取出す。次いで水平に静置し、上方から
乾燥状態の水酸化ニッケル粉末を少量ずつ落として基板
中に充填した後、乾燥、加圧圧縮して本発明に係るニッ
ケル陽極板（本発明品）を得た。また、焼結後の取出し
温度を２００℃とした他は同様の工程によって比較用の
ニッケル陽極板（比較量）を作製した。The three-dimensional network structure metal porous body thus obtained is used as a substrate, and this substrate is immersed in a fluororesin dispersion to be impregnated with the liquid and then taken out. Next, the substrate was left to stand still horizontally, and dried nickel hydroxide powder was dropped little by little from above to fill the substrate, and then dried and compressed under pressure to obtain a nickel anode plate according to the present invention (product of the present invention). . In addition, a nickel anode plate for comparison (comparative amount) was produced using the same process except that the temperature at which it was taken out after sintering was 200°C.
以上の２つの極板について、活物質充填量（ｇ／ＣＣ）
、充填の均一性、並びに活物質利用率（％）を夫々測定
した。結果は第１表に示す通りでおる。For the above two electrode plates, active material filling amount (g/CC)
, filling uniformity, and active material utilization rate (%) were measured. The results are shown in Table 1.
上表より、本発明品は活物質充填が非常に均一に行なわ
れているのみならず、活物質充＊ｆｆｌ並びに活物質利
用率の面でも非常に優れていることがわかる。From the above table, it can be seen that the products of the present invention are not only filled with active material very uniformly, but also very excellent in terms of active material filling*ffl and active material utilization.
次に、焼結炉からの取出し温度と活物質充填性との関係
を調べるため、取出し温度を種々変えた以外は上記と同
様にして得た基板中に上記と同様の方法で活物質充填を
行なった時の、取出し温度（°Ｃ）と活物質充１ａ皐（
Ｑ／ｃｃ）との関係を第２表に示す。Next, in order to investigate the relationship between the temperature taken out from the sintering furnace and the filling properties of the active material, active material was filled in the same manner as above into the substrates obtained in the same manner as above, except that the taken out temperature was varied. When the extraction temperature (°C) and active material charge 1a (
Table 2 shows the relationship with Q/cc).
上表より、取出し温度が１４０℃以下、好ましくは１０
０℃以下の時に多量の活物質充填を行なえ、また、充填
量の増大により充填性を均一なものとすることができる
ことがわかる。From the above table, the take-out temperature is 140℃ or less, preferably 10
It can be seen that a large amount of active material can be filled when the temperature is below 0° C., and that filling properties can be made uniform by increasing the amount of filling.
尚、以上はニッケル繊維マツ１〜を基板として用いたニ
ッケル陽極について）ホべたが、これに限定されず、発
泡ニッケル体を基板とした場合、必るいはカドミウム陰
極に適用した場合にも同様の効果が得られることは言う
までもない。Although the above description is about a nickel anode using nickel fiber pine 1~ as a substrate, it is not limited to this, and the same applies when a foamed nickel body is used as a substrate, or when applied to a cadmium cathode. Needless to say, it is effective.
〈発明の効果〉
以上のように構成されるこの発明のアルカリ蓄電池用極
板の製造方法によれば、基板表面の酸化度を低く抑える
ことによって基板表面の親和性が改善され、基板への均
−且つ多量の活物質充填が確実に行なえることに加えて
、活物質利用率の向上により、極板性能向上を図れると
いう効果を奏する。<Effects of the Invention> According to the method of manufacturing an electrode plate for an alkaline storage battery of the present invention configured as described above, the affinity of the substrate surface is improved by suppressing the degree of oxidation of the substrate surface, and the uniformity to the substrate is improved. - In addition to being able to reliably fill a large amount of active material, there is an effect that the performance of the electrode plate can be improved by improving the active material utilization rate.
Claims (1)
三次元的に連続した空孔を有する金属多孔体を形成し、
焼結後焼結炉中で１４０℃以下まで温度を下げて冷却し
た後、前記金属多孔体を焼結炉から取出し、この金属多
孔体を基板として前記空孔中に活物質粉末を充填するこ
とを特徴とするアルカリ蓄電池用極板の製造方法。 ２、前記金属多孔体は製造最終工程において焼結炉中で
焼結処理されるものであって、焼結後の冷却を１４０℃
以下まで行なった後に前記金属多孔体を焼結炉から取出
すことを特徴とする特許請求の範囲第１項記載の製造方
法。[Claims] 1. A metal porous body having three-dimensionally continuous pores is formed by sintering in a reducing atmosphere or vacuum sintering furnace,
After sintering, the temperature is lowered to 140° C. or less in a sintering furnace, and then the metal porous body is taken out from the sintering furnace, and the pores are filled with active material powder using this metal porous body as a substrate. A method for producing an electrode plate for an alkaline storage battery, characterized by: 2. The metal porous body is sintered in a sintering furnace in the final manufacturing process, and cooled to 140°C after sintering.
2. The manufacturing method according to claim 1, wherein the porous metal body is taken out from the sintering furnace after the following steps have been carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60207369A JPS6266573A (en) | 1985-09-19 | 1985-09-19 | Manufacture of plate for alkaline storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60207369A JPS6266573A (en) | 1985-09-19 | 1985-09-19 | Manufacture of plate for alkaline storage battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6266573A true JPS6266573A (en) | 1987-03-26 |
Family
ID=16538588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60207369A Pending JPS6266573A (en) | 1985-09-19 | 1985-09-19 | Manufacture of plate for alkaline storage battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6266573A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01272764A (en) * | 1988-04-23 | 1989-10-31 | Sony Corp | Method and device for sputtering |
-
1985
- 1985-09-19 JP JP60207369A patent/JPS6266573A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01272764A (en) * | 1988-04-23 | 1989-10-31 | Sony Corp | Method and device for sputtering |
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