JPH0554221B2 - - Google Patents
Info
- Publication number
- JPH0554221B2 JPH0554221B2 JP60045558A JP4555885A JPH0554221B2 JP H0554221 B2 JPH0554221 B2 JP H0554221B2 JP 60045558 A JP60045558 A JP 60045558A JP 4555885 A JP4555885 A JP 4555885A JP H0554221 B2 JPH0554221 B2 JP H0554221B2
- Authority
- JP
- Japan
- Prior art keywords
- paste
- cadmium
- active material
- water
- nitrilotriacetic acid
- 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.)
- Expired - Lifetime
Links
- 239000011149 active material Substances 0.000 claims description 16
- CXKCTMHTOKXKQT-UHFFFAOYSA-N cadmium oxide Inorganic materials [Cd]=O CXKCTMHTOKXKQT-UHFFFAOYSA-N 0.000 claims description 14
- CFEAAQFZALKQPA-UHFFFAOYSA-N cadmium(2+);oxygen(2-) Chemical compound [O-2].[Cd+2] CFEAAQFZALKQPA-UHFFFAOYSA-N 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 claims description 12
- 229910052793 cadmium Inorganic materials 0.000 claims description 9
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 150000003839 salts Chemical class 0.000 claims description 9
- 239000002904 solvent Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 3
- PLLZRTNVEXYBNA-UHFFFAOYSA-L cadmium hydroxide Chemical compound [OH-].[OH-].[Cd+2] PLLZRTNVEXYBNA-UHFFFAOYSA-L 0.000 description 6
- 239000003960 organic solvent Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000013006 addition curing Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- RHPXYIKALIRNFA-UHFFFAOYSA-L disodium;2-[carboxylatomethyl(carboxymethyl)amino]acetate Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CC([O-])=O RHPXYIKALIRNFA-UHFFFAOYSA-L 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 238000003825 pressing 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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- 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)
- Battery Electrode And Active Subsutance (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明はアルカリ蓄電池用ペースト式カドミウ
ム負極板の製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing a paste-type cadmium negative electrode plate for alkaline storage batteries.
従来の技術とその問題点
ペースト式カドミウム負極板を製造するに際し
原料活物質粉末としては、金属カドミウム、水酸
化カドミウム及び酸化カドミウムが考えられる
が、金属カドミウムはコストが高く且つ粒子が大
きく活性が低いため、活物質の主原料としては不
適当である。また水酸化カドミウムは酸化カドミ
ウムに比して密度が小さく、極板体積当りのエネ
ルギー密度が低くなるという短所がある。これら
の事から、コスト及びエネルギー密度の点で酸化
カドミウムを活物質原料とするのが望ましい。Conventional technology and its problems Metal cadmium, cadmium hydroxide, and cadmium oxide are considered as the raw material active material powder when manufacturing a paste-type cadmium negative electrode plate, but metal cadmium is expensive, has large particles, and has low activity. Therefore, it is unsuitable as a main raw material for active materials. Furthermore, cadmium hydroxide has a lower density than cadmium oxide, and has the disadvantage that the energy density per electrode plate volume is lower. For these reasons, it is desirable to use cadmium oxide as the raw material for the active material in terms of cost and energy density.
溶媒としては有機溶剤及び水が考えられるが、
コストの安い水を使つた場合、酸化カドミウムは
水と反応して水酸化カドミウムに変化し、極板体
積当りのエネルギー密度が低下するのみならず、
ペーストの硬化が短時間のうちに起こり作業性が
著しく低下するため、従来は溶媒として有機溶剤
を用いていた。有機溶剤は酸化カドミウムと反応
しないので、極板体積当りのエネルギー密度及び
活物質利用率の高いペースト式カドミウム負極板
が得られ、また作業性も良い等の利点がある一
方、原料コストが水に比して高いのみならず、有
機溶剤を除去する方法が制限されており、製造工
程が複雑になり製造コストが高くなる。また火災
の危険性もある。これらの事からペースト式カド
ミウム負極板としては、極板体積当りのエネルギ
ー密度及び活物質利用率が高く、コストの安い製
造法が望まれていた。 Organic solvents and water can be considered as solvents, but
When cheap water is used, cadmium oxide reacts with water and changes to cadmium hydroxide, which not only lowers the energy density per plate volume, but also
Conventionally, organic solvents have been used as solvents because the paste hardens within a short period of time, significantly reducing workability. Since organic solvents do not react with cadmium oxide, paste-type cadmium negative electrode plates with high energy density and active material utilization per plate volume can be obtained, and while they have advantages such as good workability, raw material costs are low due to water consumption. Not only is the method of removing the organic solvent relatively expensive, but the method for removing the organic solvent is limited, making the manufacturing process complicated and increasing the manufacturing cost. There is also a risk of fire. For these reasons, there has been a desire for a paste-type cadmium negative electrode plate that has a high energy density per plate volume, a high active material utilization rate, and a low-cost manufacturing method.
本発明は以上のような従来技術の問題点を解決
することを目的とするものである。 The present invention aims to solve the problems of the prior art as described above.
問題点を解決するための手段
本発明はアルカリ蓄電池用ペースト式カドミウ
ム負極板の製造法において、酸化カドミウムを含
む活物質粉末を結着剤及び水を主体とする溶媒と
共に混練してペーストとするに際し、ニトリロ三
酢酸またはその塩のうち少なくとも１つを添加す
ることを特徴とするものである。Means for Solving the Problems The present invention is a method for producing a paste-type cadmium negative electrode plate for alkaline storage batteries, in which an active material powder containing cadmium oxide is kneaded with a binder and a solvent mainly composed of water to form a paste. , nitrilotriacetic acid, or a salt thereof.
作 用
酸化カドミウムを含む活物質粉末を結着剤及び
水を主体とする溶媒と共に混練してペーストとす
るに際し、ニトリロ三酢酸及びその塩のうち少く
とも１つを添加すると酸化カドミウムが水と反応
して水酸化カドミウムに変化するのを抑制する。
つまり、原料及び製造コストの安い水を溶媒とし
て使用しているにもかかわらず、従来のニトリロ
三酢酸あるいはその塩を添加しない水系の製造法
によつた場合に比し、その作業性や極板のエネル
ギー密度及び活物質利用率が改善され、溶媒に有
機溶媒を用いたのと同様の効果が得られる。Effect When kneading active material powder containing cadmium oxide with a binder and a solvent mainly composed of water to make a paste, adding at least one of nitrilotriacetic acid and its salt causes cadmium oxide to react with water. and inhibits it from changing into cadmium hydroxide.
In other words, even though water is used as a solvent because of its low raw material and production costs, its workability and electrode plates are significantly lower than when using conventional water-based production methods that do not add nitrilotriacetic acid or its salts. The energy density and active material utilization rate are improved, and the same effect as using an organic solvent as the solvent can be obtained.
ニトリロ三酢酸及びその塩が前記の効果を持つ
理由は明らかでないが、酸化カドミウム粒子の表
面で水に不溶性の化合物を形成していると思われ
る。 The reason why nitrilotriacetic acid and its salts have the above effect is not clear, but it is thought that they form a water-insoluble compound on the surface of the cadmium oxide particles.
実施例
１ 酸化カドミウム（活物質粉末）100部とメチ
ルセルロース（結着剤）２部とニトリロ三酢酸
0.6部と水（溶媒）80部とを混練してペースト
状とし、このペーストを鉄にニツケルメツキし
た金属多孔板に所定の厚さに塗布した後、90℃
にて乾燥し、最終的にプレスによつて厚み調節
した負極板を作製し、これを試料Ａとした。Example 1 100 parts of cadmium oxide (active material powder), 2 parts of methyl cellulose (binder), and nitrilotriacetic acid
Knead 0.6 parts and 80 parts of water (solvent) to form a paste, apply this paste to a predetermined thickness on a perforated metal plate made of nickel plated iron, and heat at 90°C.
A negative electrode plate whose thickness was finally adjusted by pressing was produced, and this was designated as Sample A.
２ 上記実施例１におけるニトリロ三酢酸の代り
にニトリロ三酢酸２ナトリウムを用い、実施例
１と同様の方法で負極板を作製し、これを試料
Ｂとした。2 A negative electrode plate was prepared in the same manner as in Example 1, using disodium nitrilotriacetate instead of nitrilotriacetic acid in Example 1, and this was designated as Sample B.
また比較のために、上記実施例１からニトリ
ロ三酢酸を除いた配合で実施例１と同様の方法
で負極板を作製し、これを試料Ｃとした。 For comparison, a negative electrode plate was prepared in the same manner as in Example 1 except that nitrilotriacetic acid was removed from Example 1, and this was designated as Sample C.
以上のようにして得た試料Ａ，Ｂ，Ｃを40×40
mmの寸法に切断したのち、S.G. 1.250（20℃）
KOH中で試料と同寸法の焼結式ニツケル正極２
枚を対極として用い、試料の理論容量に対し
0.2CAの通電電流で充放電した場合の放電時活物
質利用率を第１図に、放電電気量を第２図に示
す。 Samples A, B, and C obtained as above were placed in a 40×40
After cutting into mm dimensions, SG 1.250 (20℃)
Sintered nickel positive electrode 2 with the same dimensions as the sample in KOH
Using a plate as the counter electrode,
Figure 1 shows the active material utilization rate during discharge when charging and discharging with a current of 0.2 CA, and Figure 2 shows the amount of discharged electricity.
これらの図から明らかなように、ニトリロ三酢
酸あるいはその塩を添加し、酸化カドミウムが水
酸化カドミウムに変化するのを抑制した試料Ａ，
Ｂはそうでない試料Ｃよりも極板性能がかなり改
善されている。また活物質ペーストが硬化するま
での可使時間はニトリロ三酢酸あるいはその塩を
添加した実施例１及び２の場合、約48〜24時間で
あるのに対し、添加しない場合は約20分ほどであ
つた。これらの事からニトリロ三酢酸及びその塩
の添加硬化は明らかであり、その工業的価値は大
なるものである。 As is clear from these figures, sample A, in which nitrilotriacetic acid or its salt was added to suppress the conversion of cadmium oxide to cadmium hydroxide;
The electrode plate performance of B is considerably improved over that of sample C, which does not have this condition. In addition, the pot life until the active material paste hardens is approximately 48 to 24 hours in the case of Examples 1 and 2 in which nitrilotriacetic acid or its salt is added, whereas it is approximately 20 minutes in the case where the active material paste is not added. It was hot. From these facts, it is clear that addition curing of nitrilotriacetic acid and its salts is of great industrial value.
発明の効果
以上のように本発明では酸化カドミウムを含む
活物質粉末を結着剤及び水を主体とする溶媒と共
に混練してペーストとするに際し、ニトリロ三酢
酸及びその塩のうち少くとも１つを添加する事に
よつて酸化カドミウムが水と反応して水酸化カド
ミウムへ変化するのを抑制して作業性の低下を防
ぐと共にエネルギー密度及び活物質利用率の高い
ペースト式カドミウム負極板を得る事が出来る。Effects of the Invention As described above, in the present invention, when kneading active material powder containing cadmium oxide with a binder and a solvent mainly composed of water to form a paste, at least one of nitrilotriacetic acid and its salt is added. By adding it, it is possible to suppress the reaction of cadmium oxide with water and change to cadmium hydroxide, thereby preventing a decrease in workability and obtaining a paste-type cadmium negative electrode plate with high energy density and active material utilization rate. I can do it.
第１図は充放電サイクルに伴なう放電時活物質
利用率を比較した図、第２図はその放電電気量を
比較した図である。
Ａ，Ｂ……本発明品、Ｃ……従来品。
FIG. 1 is a diagram comparing the active material utilization rate during discharge accompanying charge/discharge cycles, and FIG. 2 is a diagram comparing the amount of discharged electricity. A, B...Product of the present invention, C...Conventional product.
Claims (1)
び水を主体とする溶媒と共に混練してペースト状
とし、該ペーストを集電体に塗布、乾燥するもの
において、前記ペースト中にニトリロ三酢酸及び
その塩のうち少くとも１つを添加する事を特徴と
するアルカリ蓄電池用カドミウム負極板の製造
法。1 An active material powder containing cadmium oxide is kneaded with a binder and a solvent mainly composed of water to form a paste, and the paste is applied to a current collector and dried, in which nitrilotriacetic acid and its A method for producing a cadmium negative electrode plate for an alkaline storage battery, characterized by adding at least one salt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60045558A JPS61203567A (en) | 1985-03-06 | 1985-03-06 | Manufacture of negative cadmium plate for alkaline storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60045558A JPS61203567A (en) | 1985-03-06 | 1985-03-06 | Manufacture of negative cadmium plate for alkaline storage battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61203567A JPS61203567A (en) | 1986-09-09 |
| JPH0554221B2 true JPH0554221B2 (en) | 1993-08-12 |
Family
ID=12722688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60045558A Granted JPS61203567A (en) | 1985-03-06 | 1985-03-06 | Manufacture of negative cadmium plate for alkaline storage battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61203567A (en) |
-
1985
- 1985-03-06 JP JP60045558A patent/JPS61203567A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61203567A (en) | 1986-09-09 |
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