JPH0560221B2 - - Google Patents
Info
- Publication number
- JPH0560221B2 JPH0560221B2 JP59244138A JP24413884A JPH0560221B2 JP H0560221 B2 JPH0560221 B2 JP H0560221B2 JP 59244138 A JP59244138 A JP 59244138A JP 24413884 A JP24413884 A JP 24413884A JP H0560221 B2 JPH0560221 B2 JP H0560221B2
- Authority
- JP
- Japan
- Prior art keywords
- cadmium
- cathode
- cadmium cathode
- 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
- 229910052793 cadmium Inorganic materials 0.000 claims description 47
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 47
- 238000003860 storage Methods 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 18
- 239000012298 atmosphere Substances 0.000 claims description 12
- CXKCTMHTOKXKQT-UHFFFAOYSA-N cadmium oxide Inorganic materials [Cd]=O CXKCTMHTOKXKQT-UHFFFAOYSA-N 0.000 claims description 7
- CFEAAQFZALKQPA-UHFFFAOYSA-N cadmium(2+);oxygen(2-) Chemical compound [O-2].[Cd+2] CFEAAQFZALKQPA-UHFFFAOYSA-N 0.000 claims description 7
- 239000011149 active material Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 3
- 239000012744 reinforcing agent Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000006258 conductive agent Substances 0.000 description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 7
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 230000006866 deterioration Effects 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910001868 water Inorganic materials 0.000 description 3
- PLLZRTNVEXYBNA-UHFFFAOYSA-L cadmium hydroxide Chemical compound [OH-].[OH-].[Cd+2] PLLZRTNVEXYBNA-UHFFFAOYSA-L 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
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal 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
- 238000010926 purge Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000011835 investigation Methods 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
- 239000000203 mixture Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000005979 thermal decomposition reaction 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
- H01M4/24—Electrodes for alkaline accumulators
- H01M4/246—Cadmium electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/52—Removing gases inside the secondary cell, e.g. by absorption
- H01M10/526—Removing gases inside the secondary cell, e.g. by absorption by gas recombination on the electrode surface or by structuring the electrode surface to improve gas recombination
-
- 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＞
この発明はアルカリ蓄電池用カドミウム陰極の
保存方法に関し、詳しくは、ニツケルカドミウム
蓄電池等に使用されるペースト式カドミウム陰極
を空気雰囲気中において性能劣化することなく保
存できる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 preserving a cadmium cathode for an alkaline storage battery, and more specifically, the present invention relates to a method for preserving a cadmium cathode for an alkaline storage battery. It is about a method that can be saved without
＜従来の技術＞
ニツケルカドミウム蓄電池に代表されるアルカ
リ蓄電池に使用されるカドミウム陰極としては、
焼結式、ペースト式等のものが知られている。こ
のうち、焼結式カドミウム陰極は、多孔性金属板
からなる芯体に、カーボニルニツケル等の焼結用
金属粉末とカルボキシメチルセルロース等の粘着
剤及び水との混合物であるニツケルスラリーを塗
着し乾燥した後、これを焼成して多孔性の焼結基
板を作成し、この焼結基板を硝酸カドミウム水溶
液中に含浸し、爾後、焼結基板の微孔中に保持さ
れた硝酸カドミウムをアルカリ置換、熱分解、電
解等の方法により水酸化カドミウムに置換すると
いう複雑な工程により製造している。これに対し
て、ペースト式カドミウム陰極は、特開昭58−
35870号公報に開示されているように、上記と同
様の芯体に、酸化カドミウムを主体とする活物質
にポリエチレン等の合成樹脂繊維からなる増強剤
及びメチルセルロース等の結着剤等を加えて練合
した混練ペーストを、直接塗着し、爾後、乾燥す
るという極く簡単な工程で作られる。<Conventional technology> Cadmium cathodes used in alkaline storage batteries, such as nickel-cadmium storage batteries, are
Sintering type, paste type, etc. are known. Among these, the sintered cadmium cathode is made by coating a core made of a porous metal plate with nickel slurry, which is a mixture of sintering metal powder such as carbonyl nickel, adhesive such as carboxymethyl cellulose, and water, and then drying it. After that, this is fired to create a porous sintered substrate, this sintered substrate is impregnated in an aqueous cadmium nitrate solution, and then the cadmium nitrate held in the micropores of the sintered substrate is replaced with alkali. It is manufactured through a complicated process of replacing cadmium with cadmium hydroxide using methods such as thermal decomposition and electrolysis. On the other hand, the paste-type cadmium cathode is
As disclosed in Publication No. 35870, an active material mainly composed of cadmium oxide, a reinforcing agent made of synthetic resin fibers such as polyethylene, a binder such as methyl cellulose, etc. are added to the same core as above and kneaded. It is made using an extremely simple process of directly applying the mixed paste and then drying it.
＜発明が解決しようとする問題点＞
ところで、ペースト式カドミウム陰極は、上述
した如く焼結式カドミウム陰極に比較してその製
造工程が簡単であるため、廉価に製造できて電池
のコストを低く抑えることができるという長所が
ある反面、空気雰囲気中に放置しておくと活物質
である酸化カドミウムが空気中の水分、酸素およ
び二酸化炭素と吸収反応する結果、陰極重量及び
厚みが増加し、このため、陰極としての重量効率
や体積効率が低下してしまうという問題がある。<Problems to be Solved by the Invention> By the way, as mentioned above, the manufacturing process of the paste-type cadmium cathode is simpler than that of the sintered-type cadmium cathode, so it can be manufactured at a low cost and the cost of the battery can be kept low. On the other hand, if left in an air atmosphere, the active material cadmium oxide absorbs and reacts with moisture, oxygen, and carbon dioxide in the air, resulting in an increase in the weight and thickness of the cathode. However, there is a problem in that the weight efficiency and volumetric efficiency as a cathode decrease.
また、上記吸収反応によりカドミウム陰極中の
酸化カドミウム表面が水酸化カドミウムに変化す
る結果、カドミウム陰極の充電効率が低下してし
まうという問題も生じる。このため、密閉型ニツ
ケルカドミウム蓄電池等では、カドミウム陰極の
充電効率低下に伴う陰極充電量の減少によつて、
陽陰極間の充電容量差が小さくなつて高率放電時
の特性劣化が顕著となる等の不都合がでてくる。 Furthermore, as a result of the above absorption reaction, the surface of cadmium oxide in the cadmium cathode changes to cadmium hydroxide, resulting in a problem that the charging efficiency of the cadmium cathode decreases. For this reason, in sealed nickel-cadmium storage batteries, etc., due to a decrease in the amount of cathode charge due to a decrease in the charging efficiency of the cadmium cathode,
The difference in charge capacity between the anode and cathode becomes small, resulting in disadvantages such as noticeable deterioration of characteristics during high rate discharge.
上記のような空気雰囲気中の保存時におけるカ
ドミウム陰極の吸収反応を防止するため、真空中
における保存、あるいは、窒素パージ（真空にし
た後に窒素を充填）する方法等が用いられている
が、保存に煩雑な手間と大きなコストがかかつて
しまうという欠点があり、あまり実用的な方法と
はいえない。 In order to prevent the absorption reaction of the cadmium cathode during storage in an air atmosphere as described above, methods such as storage in a vacuum or nitrogen purge (filling with nitrogen after creating a vacuum) are used. This method has the drawbacks of requiring a lot of time and effort, and is not a very practical method.
＜問題点を解決するための手段＞
本発明者は、空気雰囲気中におけるカドミウム
陰極の保存方法について研究した結果、カドミウ
ム陰極の表面に特定の導電剤を塗着した場合に
は、上記問題点を解決できることを見出してこの
発明を完成するに至つた。即ち、この発明のアル
カリ蓄電池用カドミウム陰極の保存方法は、酸化
カドミウムを主体とする活物質に増強剤、結着剤
等を加えてなる混練ペーストを芯体に塗着し乾燥
してなるカドミウム陰極の表面に、カーボン粉末
とポリビニルアルコールとを含んでなる導電剤を
塗着し、相対湿度８％以下の空気雰囲気中で保存
することを要旨とする。<Means for Solving the Problems> As a result of research on a method for preserving cadmium cathodes in an air atmosphere, the present inventor found that the above problems can be solved if a specific conductive agent is applied to the surface of a cadmium cathode. After discovering a solution to the problem, we completed this invention. That is, the method of preserving a cadmium cathode for an alkaline storage battery according to the present invention is to prepare a cadmium cathode by applying a kneaded paste made of an active material mainly composed of cadmium oxide and adding a reinforcing agent, a binder, etc. to a core body and drying the paste. The main idea is to apply a conductive agent containing carbon powder and polyvinyl alcohol to the surface of the device and store it in an air atmosphere with a relative humidity of 8% or less.
＜作用＞
上記導電剤を塗着した結果カドミウム陰極の表
面に形成される塗膜によつて、保存雰囲気である
空気中の水、酸素あるいは二酸化炭素と酸化カド
ミウムとの吸収反応の発生を防止あるいは抑制で
き、カドミウム陰極の保存による性能劣化を有効
に防ぐことができる。また、保存時においては空
気中の水分の影響が大きく、空気中の相対湿度が
８％を超えた状態においては、上記塗膜による防
湿効果が小さくなつてカドミウム陰極の性能劣化
が大きくなるので上記範囲とすることで有効な保
存が可能となる。そしてこの様な保存方法を用い
ることによつて、従来のような真空中あるいは窒
素パージによる保存をせずとも、空気雰囲気中で
カドミウム陰極をさしたる性能劣化なく保存する
ことができる訳である。<Function> The coating film formed on the surface of the cadmium cathode as a result of applying the above-mentioned conductive agent prevents the occurrence of an absorption reaction between water, oxygen, or carbon dioxide in the storage atmosphere and cadmium oxide. It is possible to effectively prevent performance deterioration due to storage of the cadmium cathode. In addition, during storage, the influence of moisture in the air is significant, and when the relative humidity in the air exceeds 8%, the moisture-proofing effect of the coating film described above decreases and the performance deterioration of the cadmium cathode increases. By setting it as a range, effective storage becomes possible. By using this storage method, the cadmium cathode can be stored in an air atmosphere without significant performance deterioration, without the need for conventional storage in a vacuum or nitrogen purge.
＜実施例＞
公知の方法により作つたペースト式カドミウム
陰極の表面に、カーボン粉末とポリビニルアルコ
ールよりなる導電剤を約10μｍの厚みで塗着し、
乾燥して、表面に導電剤の塗膜を有するカドミウ
ム陰極を製造した。このようなカドミウム陰極を
多数個作り、相対湿度８％以下に保持した空気雰
囲気中でそれぞれ異なる期間保存した後、公知の
方法により作つたニツケル陽極と組合せて公称容
量1.3AHのニツケルカドミウム蓄電池（本発明電
池）を製作した。そして、カドミウム陰極の表面
に上記の導電剤を塗着しない点を除いては上記と
同様のニツケルカドミウム蓄電池（従来電池）を
作り、これらの電池それぞれＣ／３（433ｍＡ）で
144分間充電を行なつた後、Ｃ／３（433ｍＡ）で
放電する実験を行なつて、カドミウム陰極の充電
効率の保存による経時変化を調べた。結果は第１
図に示す通りであり、Ａは本発明電池、Ｂは従来
電池である。同図から明らかなように、この発明
の方法により保存したカドミウム陰極は従来のも
のに比べて保存による性能の劣化率が小さく、４
週間以上も製作時と同様の充電効率を維持してい
ることがわかる。<Example> A conductive agent made of carbon powder and polyvinyl alcohol was applied to a thickness of about 10 μm on the surface of a paste-type cadmium cathode made by a known method.
By drying, a cadmium cathode having a coating film of a conductive agent on the surface was manufactured. After making a large number of such cadmium cathodes and storing them for different periods of time in an air atmosphere maintained at a relative humidity of 8% or less, they are combined with a nickel anode made by a known method to create a nickel-cadmium storage battery with a nominal capacity of 1.3AH. Invented battery) was produced. Next, we made nickel cadmium storage batteries (conventional batteries) similar to the above except that the above conductive agent was not applied to the surface of the cadmium cathode, and each of these batteries was operated at C/3 (433 mA).
After charging for 144 minutes, an experiment was conducted in which the battery was discharged at C/3 (433 mA) to examine changes in the charging efficiency of the cadmium cathode over time due to storage. The result is the first
As shown in the figure, A is a battery of the present invention and B is a conventional battery. As is clear from the figure, the cadmium cathode preserved by the method of this invention has a smaller rate of performance deterioration due to storage than the conventional one, and
It can be seen that the same charging efficiency as at the time of manufacture was maintained for more than a week.
また、上記と同様の本発明電池Ａと従来電池Ｂ
とを0.1C（130ｍＡ）で16時間充電した後、8C
（10.4A）で高率放電してその放電時間を調べた
結果を第２図に示す。同図において、本発明電池
の放電時間が従来電池より全体的に長くなつてい
るのは、導電剤塗着によりカドミウム陰極の導電
性が向上したことに起因すると思われる。また、
４週間以上保存じたカドミウム陰極を用いた場合
でも本発明電池はそれ以下の保存期間のカドミウ
ム陰極を用いた場合と同様の放電時間を維持して
いることがわかる。 In addition, the present invention battery A and the conventional battery B similar to the above
After charging at 0.1C (130mA) for 16 hours, 8C
Figure 2 shows the results of high-rate discharge (10.4A) and investigation of the discharge time. In the figure, the reason that the discharge time of the battery of the present invention is generally longer than that of the conventional battery is thought to be due to the improvement in the conductivity of the cadmium cathode due to the coating of the conductive agent. Also,
It can be seen that even when using a cadmium cathode that has been stored for more than 4 weeks, the battery of the present invention maintains the same discharge time as when using a cadmium cathode that has been stored for a shorter period of time.
更に、保存時における空気雰囲気中の相対湿度
の影響を調べるために、前記と同様の方法によつ
て表面に導電剤を塗着したカドミウム陰極を多数
個作り、それぞれ異なる相対湿度の空気雰囲気中
で４週間保存した後、公知のニツケル陽極と組合
せて公称容量1.3AHのニツケルカドミウム蓄電池
を製作し、この電池をＣ／３（433ｍＡ）で144分
間充電を行なつた後、Ｃ／３（433ｍＡ）で放電し
た場合におけるカドミウム陰極の充電効率の変化
を調べた。結果は第３図に示す通りであり、相対
湿度が８％を超えると充電効率の低下がみられる
ことがわかる。 Furthermore, in order to investigate the influence of the relative humidity in the air atmosphere during storage, we made a number of cadmium cathodes with a conductive agent coated on their surfaces using the same method as above, and each one was placed in an air atmosphere with a different relative humidity. After storage for 4 weeks, a nickel cadmium storage battery with a nominal capacity of 1.3 AH was produced by combining it with a known nickel anode, and this battery was charged at C/3 (433 mA) for 144 minutes. We investigated the change in charging efficiency of a cadmium cathode when discharging at The results are shown in FIG. 3, and it can be seen that when the relative humidity exceeds 8%, the charging efficiency decreases.
＜発明の効果＞
以上のようにこの発明のアルカリ蓄電池用カド
ミウム陰極の保存方法は、カドミウム陰極の表面
にカーボン粉末とポリビニルアルコールとを含ん
でなる導電剤を塗着して相対湿度８％以下の空気
雰囲気中で保存するものであり、導電剤塗着によ
つてカドミウム陰極表面にできた塗膜によつて、
カドミウム陰極中の活物質である酸化カドミウム
と空気中の水、酸素、二酸化炭素との吸収反応を
有効に防止できる。このため、カドミウム陰極を
性能劣化なく空気雰囲気中で保存することがで
き、カドミウム陰極保存時の手間とコストを著し
く軽減できるという優れた効果を奏する。また、
上記のように保存時の吸収反応によるカドミウム
陰極の性能劣化を防止できる効果、カドミウム陰
極の充電効率を適正に維持でき、よつて、密閉型
ニツケルカドミウム蓄電池等における高率放電特
性向上にも寄与するという利点もある。<Effects of the Invention> As described above, the method for preserving a cadmium cathode for an alkaline storage battery according to the present invention involves coating the surface of the cadmium cathode with a conductive agent containing carbon powder and polyvinyl alcohol, and storing the cadmium cathode at a relative humidity of 8% or less. It is stored in an air atmosphere, and the coating film formed on the surface of the cadmium cathode by applying a conductive agent
It is possible to effectively prevent absorption reactions between cadmium oxide, which is the active material in the cadmium cathode, and water, oxygen, and carbon dioxide in the air. Therefore, the cadmium cathode can be stored in an air atmosphere without performance deterioration, and the excellent effect of significantly reducing the effort and cost during storage of the cadmium cathode is achieved. Also,
As mentioned above, it has the effect of preventing the performance deterioration of the cadmium cathode due to absorption reactions during storage, and the charging efficiency of the cadmium cathode can be maintained appropriately, thus contributing to improving the high rate discharge characteristics of sealed nickel-cadmium storage batteries, etc. There is also an advantage.
第１図はこの発明による導電剤塗着を行なつた
カドミウム陰極と導電剤塗着なしのカドミウム陰
極の充電効率の保存による経時変化を示したグラ
フ、第２図は導電剤を塗着したカドミウム陰極と
塗着なしのカドミウム陰極をそれぞれ用いてなる
ニツケルカドミウム蓄電池の高率放電特性とカド
ミウム陰極の保存期間との関係を示したグラフ、
第３図は同様な導電剤塗着を行なつたカドミウム
陰極の、保存時の相対湿度と充電効率との関係を
示したグラフである。
Figure 1 is a graph showing the change in charging efficiency over time of a cadmium cathode coated with a conductive agent according to the present invention and a cadmium cathode without a conductive agent coated. A graph showing the relationship between the high rate discharge characteristics of a nickel cadmium storage battery using a cathode and an unpainted cadmium cathode and the storage period of the cadmium cathode,
FIG. 3 is a graph showing the relationship between relative humidity during storage and charging efficiency of a cadmium cathode coated with a similar conductive agent.
Claims (1)
剤、結着剤等を加えてなる混練ペーストを芯体に
塗着し乾燥してなるカドミウム陰極の表面にカー
ボン粉末とポリビニルアルコールとを含んでなる
導電剤を塗着し、相対湿度８％以下の空気雰囲気
中で保存することを特徴とするアルカリ蓄電池用
カドミウム陰極の保存方法。1. A conductive paste containing carbon powder and polyvinyl alcohol is coated on the surface of a cadmium cathode formed by applying a kneaded paste made by adding a reinforcing agent, a binder, etc. to an active material mainly composed of cadmium oxide and drying it. A method for preserving a cadmium cathode for an alkaline storage battery, which comprises applying an agent and storing the cathode in an air atmosphere with a relative humidity of 8% or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59244138A JPS61124053A (en) | 1984-11-19 | 1984-11-19 | Conservation of cadmium negative pole for alkaline storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59244138A JPS61124053A (en) | 1984-11-19 | 1984-11-19 | Conservation of cadmium negative pole for alkaline storage battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61124053A JPS61124053A (en) | 1986-06-11 |
| JPH0560221B2 true JPH0560221B2 (en) | 1993-09-01 |
Family
ID=17114321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59244138A Granted JPS61124053A (en) | 1984-11-19 | 1984-11-19 | Conservation of cadmium negative pole for alkaline storage battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61124053A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2006025600A1 (en) * | 2004-09-03 | 2008-05-08 | 株式会社日本触媒 | Method for storing positive electrode material composition for lithium secondary battery |
-
1984
- 1984-11-19 JP JP59244138A patent/JPS61124053A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61124053A (en) | 1986-06-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |