JPH0619987B2 - Manufacturing method of cadmium negative electrode plate for alkaline storage battery - Google Patents
Manufacturing method of cadmium negative electrode plate for alkaline storage batteryInfo
- Publication number
- JPH0619987B2 JPH0619987B2 JP60083562A JP8356285A JPH0619987B2 JP H0619987 B2 JPH0619987 B2 JP H0619987B2 JP 60083562 A JP60083562 A JP 60083562A JP 8356285 A JP8356285 A JP 8356285A JP H0619987 B2 JPH0619987 B2 JP H0619987B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode plate
- negative electrode
- water
- cadmium
- storage battery
- 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
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
-
- 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
- H01M4/24—Electrodes for alkaline accumulators
- H01M4/26—Processes of manufacture
-
- 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)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (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。TECHNICAL FIELD The present invention relates to a method for producing a paste type cadmium negative electrode plate for an alkaline storage battery.
従来の技術・発明が解決しようとする問題点 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、金属カドミウムは価
格が高く且つ粒子が大きく活性が低いため、活物質の主
原料として使用することは困難である。また水酸化カド
ミウムは酸化カドミウム，金属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
いう不都合がある。原料コスト，エネルギー密度及び極
板性能から、活物質原料としては酸化カドミウムを用い
るのが望ましいと考えられる。Problems to be Solved by Conventional Techniques and Inventions Metal cadmium, cadmium hydroxide, and cadmium oxide can be considered as raw material active material powders when manufacturing a paste type cadmium negative electrode plate, but metal cadmium is expensive and particles. Is large and the activity is low, it is difficult to use it as the main raw material of the active material. Further, cadmium hydroxide has a disadvantage that its density is lower than that of cadmium oxide and metallic cadmium, and the energy density per electrode plate volume is low. From the raw material cost, energy density and electrode plate performance, it is considered preferable to use cadmium oxide as the raw material for the active material.
一方、溶媒としては有機溶剤及び水が考えられるが、原
料コストの安い水を使った場合、酸化カドミウムは短時
間のうちに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だけでなく、活
物質ペーストが硬化して作業性が著しく低下するため、
従来はやむを得ず溶媒として有機溶剤を用いていた。有
機溶剤を用いた場合は酸化カドミウムと反応して、水酸
化カドミウムを生成することがないため、作業性がよ
く、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る反面、その
原料コストが水に比して高く、取扱いにおいては公害、
作業環境の面から種々の対策を必要とし、そのため製造
工程が複雑になり、溶媒に水を用いた場合に比べ製造コ
ストがかなり高くなる。On the other hand, organic solvents and water can be considered as the solvent, but when water with a low raw material cost is used, cadmium oxide reacts with water in a short time and changes to cadmium hydroxide, and the energy per electrode plate volume is changed. Not only the density decreases, but the active material paste hardens and the workability deteriorates significantly.
Conventionally, an organic solvent has been used as a solvent. When an organic solvent is used, it does not react with cadmium oxide to form cadmium hydroxide, so workability is good, and a paste-type cadmium negative electrode plate with a high energy density per electrode plate volume and a high active material utilization rate is used. On the other hand, the raw material cost is higher than that of water, and the pollution is
Various measures are required from the viewpoint of the working environment, which complicates the manufacturing process and considerably increases the manufacturing cost as compared with the case of using water as the solvent.
これらのこと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質の
高い負極板が得られるコストの安い製造法が望まれてい
た。For these reasons, as a paste-type cadmium negative electrode plate, a low-cost manufacturing method that can obtain a negative electrode plate having a high energy density per electrode plate volume and a high quality of active material utilization is desired.
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 is intended to solve the problems of the conventional techniques as described above.
問題点を解決するための手段 即ち、本発明はアルカリ蓄電池用ペースト式カドミウム
負極板の製造において、酸化カドミウムを含む活物質粉
末を非糖質性結着剤と水とで混練してペーストとするに
際し、水溶性糖質及びその塩のうちの少なくとも１つを
添加することにより、上述した如き目的を達成するもの
である。Means for Solving Problems That is, the present invention, in the production of a paste type cadmium negative electrode plate for alkaline storage batteries, an active material powder containing cadmium oxide is kneaded with a non-saccharide binder and water to form a paste. At this time, the above-mentioned object is achieved by adding at least one of the water-soluble sugar and its salt.
尚、本発明において非糖質性結着剤とは、糖質以外の物
質よりなる結着剤を意味するものとする。In the present invention, the non-carbohydrate binder means a binder made of a substance other than sugar.
このような非糖質性結着剤としては、アルカリ蓄電池に
一般的に用いられているポリテトラフルオロエチレンデ
ィスパージョン、ポリビニルアルコール、ラッテクス、
ポリアクリル酸ソーダ等がある。また、「非糖質性結着
剤と水とで」とは、「非糖質性結着剤と水のみとで」を
意味するものとする。As such a non-carbohydrate binder, polytetrafluoroethylene dispersion generally used in alkaline storage batteries, polyvinyl alcohol, latex,
Examples include sodium polyacrylate. In addition, "with non-sugar binding agent and water" means "with non-sugar binding agent and water only".
作 用 酸化カドミウムを含む活物質粉末を非糖質性結着剤と水
とで混練してペーストとするに際し、水溶性糖質及びそ
の塩のうちの少くとも１つを添加することによって、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
ることが抑制される。その理由は定かでないが、酸化カ
ドミウム粒子の表面で水に不溶性の化合物が形成される
ことが考えられる。この作用効果は、糖質がカドミウム
負極板中に存在することにより永続発揮されるものであ
り、本発明にかかるカドミウム負極板から水溶性糖質を
溶出除去せしめては目的効果を得ることができない。When the active material powder containing cadmium oxide is kneaded with a non-sugar binder and water to form a paste, it is oxidized by adding at least one of water-soluble sugar and its salt. Cadmium is suppressed from reacting with water and changing into cadmium hydroxide. The reason is not clear, but it is considered that a water-insoluble compound is formed on the surface of the cadmium oxide particles. This action effect is permanently exhibited by the presence of the sugar in the cadmium negative electrode plate, and the objective effect cannot be obtained by eluting and removing the water-soluble sugar from the cadmium negative electrode plate according to the present invention. .
従って上記の効果を用いれば原料及び製造のコストが安
い水を溶媒として使用した場合でも、その作業性や極板
のエネルギー密度及び活物質利用率は溶媒に有機溶剤を
用いた場合と同等の効果が得られる。Therefore, if the above effects are used, even if water is used as a solvent, which is low in raw material and manufacturing costs, the workability, the energy density of the electrode plate and the active material utilization rate are the same as those obtained when an organic solvent is used as the solvent. Is obtained.
実施例 以下、本発明の実施例について詳述する。Examples Hereinafter, examples of the present invention will be described in detail.
１．酸化カドミウム100部、ニッケル粉末10部、非糖質
性結着剤の一つであるポリテトラフルオロエチレンのデ
ィスパージョン４部、水溶性単糖類のＤ−アラビノース
Ｃ5Ｈ10Ｏ50.4部と水60部を混練してペーストとし、こ
れを厚み0.1mmのニッケルメッキした鉄板からなる金属
多孔板に所定の厚さ塗布した後、90℃にて乾燥し、最終
的に加圧工程で厚さ調節するという本発明による製造法
で負極板を作製し、これを試料Ａとした。1. 100 parts of cadmium oxide, 10 parts of nickel powder, 4 parts of dispersion of polytetrafluoroethylene which is one of non-sugar binders, 0.4 part of water-soluble monosaccharide D-arabinose C 5 H 10 O 5 and water. 60 parts are kneaded to form a paste, which is applied to a perforated metal plate made of nickel-plated iron with a thickness of 0.1 mm to a predetermined thickness, dried at 90 ° C, and finally the thickness is adjusted by a pressure process. A negative electrode plate was manufactured by the manufacturing method according to the present invention, which was referred to as Sample A.
２．前記実施例１におけるＤ−アラビノースの代わりに
水溶性単糖類に属するＤ−グルクロン酸Ｃ6Ｈ10Ｏ7のナ
トリウム塩を用い、実施例１と同様の方法で本発明製造
法による負極板を作製し、これを試料Ｂとした。2. Using a water-soluble monosaccharides belonging D- sodium salt of glucuronic acid C 6 H 10 O 7 instead of D- arabinose in Example 1, production of the negative plate according to the present invention production process in the same manner as in Example 1 This was designated as Sample B.
３．前記実施例１におけるＤ−アラビノースの代わりに
水溶性オリゴ糖類の２糖に属するアガロビオースＣ12Ｈ
20Ｏ10を用い、実施例１と同様の方法で本発明製造法に
よる負極板を作製し、これを試料Ｃとした。3. Instead of D-arabinose in Example 1, agarobiose C 12 H belonging to the disaccharide of water-soluble oligosaccharides
A negative electrode plate was manufactured by the manufacturing method of the present invention in the same manner as in Example 1 using 20 O 10 , and this was designated as Sample C.
４．前記実施例１におけるＤ−アラビノースの代わりに
水溶性多糖類に属するアガロースを用い、実施例と同様
の方法で本発明製造法による負極板を作製し、これを試
料Ｄとした。4. A negative electrode plate according to the production method of the present invention was produced in the same manner as in Example 1 except that agarose belonging to a water-soluble polysaccharide was used instead of D-arabinose in Example 1 above, and this was used as Sample D.
５．また比較のために、前記実施例１からＤ−アラビノ
ースを除いた配合で、実施例１と同様の方法で従来の製
造法による負極板を作製し、これを試料Ｅとした。5. For comparison, a negative electrode plate was prepared by the conventional manufacturing method in the same manner as in Example 1 except that D-arabinose was removed from Example 1, and this was used as Sample E.
以上のようにして得た試料Ａ〜Ｅを40×40mmの寸法に切
断したのち、比重１．２５０（20℃）のＫＯＨ水溶液中
で試料と同寸法の焼結式ニッケル正極板２枚を対極とし
て用い、試料の理論容量に対し０．２Ｃ（Ａ）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 to E obtained as described above were cut into a size of 40 × 40 mm, and two pieces of sintered nickel positive electrode plates having the same size as the sample were counter-electroded in a KOH aqueous solution having a specific gravity of 1.250 (20 ° C.). Fig. 1 shows the utilization rate of the active material during discharge when the sample was charged and discharged with a current of 0.2 C (A) with respect to the theoretical capacity of
The amount of discharged electricity is shown in FIG.
これらの図から明らかなように、水溶性糖質あるいはそ
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〜Ｄはそうでない試料Ｅ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水溶性糖質あるいはその
塩を添加した実施例１〜４の場合、約15〜40時間である
のに対し、添加しない場合は約20分ほどであった。これ
らのことから水溶性糖質及びその塩の添加効果は明らか
である。As is clear from these figures, Samples A to D in which water-soluble saccharides or salts thereof were added to suppress the change of cadmium oxide to cadmium hydroxide had much better electrode plate performance than Sample E which did not. Has been done. Also, the pot life until the active material paste is hardened is about 15 to 40 hours in the case of Examples 1 to 4 in which the water-soluble sugar or its salt is added, whereas it is about 20 minutes when it is not added. Met. From these facts, the effect of adding the water-soluble sugar and its salt is clear.
発明の効果 以上のように本発明に基づき、酸化カドミウムを含む活
物質粉末を非糖質性結着剤と水とで混練してペーストと
するに際し、水溶性糖質及びその塩のうちの少くとも１
つを添加することによって、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ことが出来る。As described above, according to the present invention, when the active material powder containing cadmium oxide is kneaded with the non-saccharide binder and water to form a paste, a small amount of water-soluble sugar and its salt is contained. With 1
Addition of cadmium oxide suppresses the reaction of cadmium oxide with water to change to cadmium hydroxide and prevents deterioration of workability, and obtains a paste type cadmium negative electrode plate with high energy density and active material utilization rate. You can
【図面の簡単な説明】 第１図および第２図は本発明製造法および従来の製造法
によって得られたペースト式カドミウム負極板の充放電
サイクルに伴なう放電時活物質利用率および放電電気量
を比較して示す特性図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 2 show the utilization rate of active material during discharge and the discharge electricity of a paste-type cadmium negative electrode plate obtained by the production method of the present invention and the conventional production method, during charge and discharge cycles. It is a characteristic view which compares and shows quantity.
Claims (5)
性結着剤と水とで混練してペースト状となし、該ペース
トを芯体に塗布、乾燥してカドミウム負極板とするもの
において、前記ペースト中に、水溶性の糖質及びその塩
のうちの少なくとも１つを添加することを特徴とするア
ルカリ蓄電池用カドミウム負極板の製造法。1. A method for preparing a cadmium negative electrode plate by kneading an active material powder containing cadmium oxide with a non-saccharide binder and water to form a paste, coating the paste on a core and drying the paste. A method for producing a cadmium negative electrode plate for an alkaline storage battery, which comprises adding at least one of a water-soluble sugar and a salt thereof to the paste.
ドミウムに対し重量比で０．０５〜５％である特許請求
の範囲第（１）項記載のアルカリ蓄電池用カドミウム負
極板の製造法。2. A cadmium negative electrode plate for an alkaline storage battery according to claim 1, wherein the addition amount of the water-soluble sugar and its salt is 0.05 to 5% by weight ratio to cadmium oxide. Manufacturing method.
囲第（１）項記載のアルカリ蓄電池用カドミウム負極板
の製造法。3. The method for producing a cadmium negative electrode plate for an alkaline storage battery according to claim 1, wherein the water-soluble sugar is a monosaccharide.
の範囲第（１）項記載のアルカリ蓄電池用カドミウム負
極板の製造法。4. The method for producing a cadmium negative electrode plate for an alkaline storage battery according to claim 1, wherein the water-soluble sugar is an oligosaccharide.
囲第（１）項記載のアルカリ蓄電池用カドミウム負極板
の製造法。5. The method for producing a cadmium negative electrode plate for an alkaline storage battery according to claim 1, wherein the water-soluble sugar is a polysaccharide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60083562A JPH0619987B2 (en) | 1985-04-17 | 1985-04-17 | Manufacturing method of cadmium negative electrode plate for alkaline storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60083562A JPH0619987B2 (en) | 1985-04-17 | 1985-04-17 | Manufacturing method of cadmium negative electrode plate for alkaline storage battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61240580A JPS61240580A (en) | 1986-10-25 |
| JPH0619987B2 true JPH0619987B2 (en) | 1994-03-16 |
Family
ID=13805954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60083562A Expired - Lifetime JPH0619987B2 (en) | 1985-04-17 | 1985-04-17 | Manufacturing method of cadmium negative electrode plate for alkaline storage battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0619987B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0670904B2 (en) * | 1985-07-23 | 1994-09-07 | 湯浅電池株式会社 | Cadmium negative plate |
| JP4570804B2 (en) * | 2001-03-30 | 2010-10-27 | ニチコン株式会社 | Electrolytic capacitor drive electrolyte |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5053842A (en) * | 1973-09-13 | 1975-05-13 | ||
| JPS5723465A (en) * | 1980-07-16 | 1982-02-06 | Matsushita Electric Ind Co Ltd | Manufacture of cadmium negative electrode for alkaline cell |
-
1985
- 1985-04-17 JP JP60083562A patent/JPH0619987B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61240580A (en) | 1986-10-25 |
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