JPH10326631A - Manufacturing method of air battery cathode body - Google Patents
Manufacturing method of air battery cathode bodyInfo
- Publication number
- JPH10326631A JPH10326631A JP9136394A JP13639497A JPH10326631A JP H10326631 A JPH10326631 A JP H10326631A JP 9136394 A JP9136394 A JP 9136394A JP 13639497 A JP13639497 A JP 13639497A JP H10326631 A JPH10326631 A JP H10326631A
- Authority
- JP
- Japan
- Prior art keywords
- activated carbon
- positive electrode
- water
- electrode body
- carbon powder
- 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
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
Landscapes
- Hybrid Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は空気電池の正極体の
製造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 cathode body of an air battery.
【０００２】[0002]
【従来の技術】大容量空気電池は、燈浮標（ブイ）や燈
台などの航路標識用電源などの電源に使用される一次電
池である。この空気電池は、空気中の酸素を活性化する
活性炭正極、亜鉛負極、及び電解液（か性カリ水溶液）
により構成され、電解液は電池使用時に注液するか、あ
るいは固体電解質を内蔵し注水によって電解質とするも
のである。2. Description of the Related Art A large-capacity air battery is a primary battery used for a power source such as a power source for a traffic sign such as a buoy or a lighthouse. This air battery has an active carbon positive electrode that activates oxygen in the air, a zinc negative electrode, and an electrolytic solution (caustic potassium aqueous solution).
The electrolyte is injected at the time of use of the battery, or a solid electrolyte is incorporated and the electrolyte is formed by water injection.
【０００３】空気電池の正極は活性炭粉末を成型、焼
成、その後パラフィンワックス防水工程を経て製造さ
れ、初期放電品質特性を安定させる目的で反応表面の改
善を行っている。その方法は、トリクロルエチレンやト
リクロルエタン等の有機溶剤（以下、溶剤という）に活
性炭粉末を分散させた粉末分散液（以下、活性剤とい
う）を正極体表面に付着させ、その後、乾燥固着させる
もので、電池初期使用時に正極体の反応面と電解液間の
濡れ性を向上し電圧特性の改善をしていた。[0003] The positive electrode of an air battery is manufactured by molding activated carbon powder, firing it, and then performing a waterproofing process on paraffin wax to improve the reaction surface for the purpose of stabilizing the initial discharge quality characteristics. The method involves adhering a powder dispersion (hereinafter, referred to as an activator) in which activated carbon powder is dispersed in an organic solvent (hereinafter, referred to as a solvent) such as trichloroethylene or trichloroethane to the surface of the positive electrode body, and then drying and fixing the powder. Thus, at the time of initial use of the battery, the wettability between the reaction surface of the positive electrode body and the electrolytic solution was improved to improve the voltage characteristics.
【０００４】[0004]
【発明が解決しようとする課題】従来法では、活性炭粉
末に溶剤を加えて適度な粘度に調整し、その液をスプレ
−ガン等を用いて強制的に正極体反応面（以下、反応面
という）に吹きつけ付着させた後、乾燥工程を経て活性
炭粉末を反応面に固定していた。この正極体に付着させ
る活性炭粉末層の厚みによって、空気電池の電圧特性が
ばらつく為、前記活性炭粉末層は、厚み４〜８ｍｍで正
極体の単位面積当たり０．０５〜０．０８ｇ／ｃｍ2に
管理されていた。In the conventional method, a solvent is added to the activated carbon powder to adjust the viscosity to an appropriate level, and the solution is forcibly forced using a spray gun or the like to obtain a positive electrode reaction surface (hereinafter referred to as a reaction surface). ), And the activated carbon powder was fixed to the reaction surface through a drying process. Since the voltage characteristics of the air battery vary depending on the thickness of the activated carbon powder layer attached to the positive electrode body, the activated carbon powder layer has a thickness of 4 to 8 mm and a thickness of 0.05 to 0.08 g / cm 2 per unit area of the positive electrode body. Was managed.
【０００５】反応面にこの活性炭粉末を固定させる方法
では、防水工程で予め正極体に含浸されている表面層の
パラフィンワックス（以下、ワックスという）を溶剤の
溶解力で溶解させ、反応面に付着させた活性炭粉末側へ
移行させ、その後溶剤を発散させることでワックスが固
化して付着力が確保されているものであった。しかし、
その付着力は正極体個々の素材のばらつき、つまりワッ
クスの含浸量や反応面の表面粗さ等に左右されやすいこ
とに加え、粉末付着力そのものが弱いという不安定なも
のであった。In the method of fixing the activated carbon powder on the reaction surface, paraffin wax (hereinafter referred to as wax) of a surface layer previously impregnated in the positive electrode body in a waterproofing step is dissolved by the solvent power of the solvent and adhered to the reaction surface. The wax was solidified by transferring the activated carbon powder to the activated carbon powder side and then evaporating the solvent, thereby securing the adhesive force. But,
The adhesive force was unstable, with the powder adhesive force itself being weak, in addition to being easily influenced by variations in the material of the positive electrode body, that is, the amount of wax impregnation and the surface roughness of the reaction surface.
【０００６】また、この種の空気電池は使用開始時に注
水して作動させるのであるが、電池の構造上、注水時に
水が正極体表面に飛散し活性炭粉末が剥がれ脱落するこ
とがあり、その程度が強い場合、電圧特性のばらつきに
影響を与えることになる。このため、電圧特性は前記活
性炭粉末が防水処理が施されていないため親水性が強く
電解液に対して極めて良く濡れ、正極体反応面にこの活
性炭粉末を適正量付着させることで電解液に対して濡れ
易くなり、電圧特性も改善されるのであるが、活性炭粉
末の脱落等があると正極体の生地が露出することにな
り、その部分の表面は他の活性炭粉末付着部分よりも電
解液の撥水性が強くなり電圧特性のばらつきの原因とな
っていた。Also, this type of air battery is operated by injecting water at the start of use. However, due to the structure of the battery, water may be scattered on the surface of the positive electrode body at the time of injecting water, and the activated carbon powder may peel off and fall off. Is strong, it affects the variation of the voltage characteristics. For this reason, the voltage characteristics are such that the activated carbon powder has not been subjected to a waterproof treatment and thus has a high hydrophilicity and is very well wetted with the electrolytic solution. However, if the activated carbon powder falls off, the material of the positive electrode body will be exposed, and the surface of that part will have more electrolytic solution than other activated carbon powder attached parts. This increases the water repellency, causing variations in voltage characteristics.
【０００７】一方、トリクロロエチレンやトリクロルエ
タンなどの溶剤を用いている為、関連設備腐食対策やそ
の製造ライン内での飛散防止の為の局所排気及び排気回
収等の環境対策費用といった経営負担も決して小さくな
かった。On the other hand, since a solvent such as trichlorethylene or trichloroethane is used, the management burden such as cost for environmental measures such as local exhaust gas and exhaust gas recovery for preventing corrosion of related equipment and for preventing scattering in the production line is also small. Did not.
【０００８】また、環境面でも製造工程において使用す
る前記溶剤はオゾン層の破壊物質ということで使用が困
難になり、代替溶剤を手当しなければならなくなった。
しかし、代替溶剤でもこの正極体の特性面から採用可能
なものは大半が石油系溶剤であり、空気電池の製造ライ
ンでの採用を試みたが、品質のばらつき或いは安全性や
関連設備更新等など経営的に負担が大きく実現に至って
いない。[0008] In addition, in terms of environment, the solvent used in the manufacturing process is a substance that destroys the ozone layer, so that it is difficult to use the solvent.
However, most of the alternative solvents that can be used in terms of the characteristics of the cathode body are petroleum-based solvents, and we tried to use them in the production line of air batteries. The burden on management is large and it has not yet been realized.
【０００９】本発明はこのような従来の課題を解決する
ものであり、放電特性を改善した空気電池を得るための
空気電池の正極体製造法を提供することを目的とするも
のである。An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a method for manufacturing a cathode body of an air battery for obtaining an air battery with improved discharge characteristics.
【００１０】[0010]
【課題を解決するための手段】上記の課題を解決するた
めに本発明の空気電池正極体の製造法は、水とポリビニ
ルアルコールと活性炭粉末の混合物から成る液状の表面
活性材料正極体表面に塗布した後、乾燥させるものであ
る。水と添加剤のポリビニルアルコ−ルからなる水溶液
に活性炭粉末を分散させたものを正極体の表面活性材料
として用いるものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a method of manufacturing an air battery cathode body according to the present invention comprises coating a liquid surface active material cathode body comprising a mixture of water, polyvinyl alcohol and activated carbon powder on a surface of the cathode body. After that, it is dried. A material obtained by dispersing activated carbon powder in an aqueous solution comprising water and polyvinyl alcohol as an additive is used as a surface active material of a positive electrode body.
【００１１】[0011]
【発明の実施の形態】本発明は水と添加剤のポリビニル
アルコ−ル（以下、ＰＶＡという）からなる水溶液に活
性炭粉末を分散させたものを正極体の表面活性材料とし
て用いる製造法である。BEST MODE FOR CARRYING OUT THE INVENTION The present invention is a production method using a dispersion of activated carbon powder in an aqueous solution comprising water and an additive polyvinyl alcohol (hereinafter referred to as PVA) as a surface active material of a positive electrode body.
【００１２】この製造法によって、ＰＶＡの粘着性と水
溶性効果によって反応面への活性炭粉末の付着性が大幅
に改善され、従来法のようにトリクロルエチレンやトリ
クロルエタンなどの溶剤を使用した場合のように、正極
体反応面からのパラフィンワックスの溶出がなく、それ
らの撥水効果を抑制する目的の余分な活性炭粉末の必要
性もなく、１個当たりの活性炭粉末の付着量の低減が図
れる。また、活性炭粉末とその分散剤に水、添加剤にポ
リビニルアルコ−ル（以下、ＰＶＡという）を採用して
いるので、製造工程において人体や環境への負荷が極め
て小さくなる。According to this production method, the adhesion of the activated carbon powder to the reaction surface is greatly improved by virtue of the tackiness and the water-solubility effect of PVA, and when a solvent such as trichloroethylene or trichloroethane is used as in the conventional method. As described above, there is no elution of paraffin wax from the reaction surface of the positive electrode body, and there is no need to use extra activated carbon powder for the purpose of suppressing their water repellency, thereby reducing the amount of activated carbon powder deposited per unit. Moreover, since water is used as the activated carbon powder and its dispersant, and polyvinyl alcohol (hereinafter referred to as PVA) is used as the additive, the load on the human body and the environment in the manufacturing process is extremely small.
【００１３】また、ＰＶＡの分子量を４００〜６００と
し、水に対する添加量が１０〜４０ｐｐｍとするもので
ある。これは、ＰＶＡの分子量は３００以下では耐熱性
が劣り、また７００以上では水に対する溶解性が悪くな
り採用不可能であり、分子量４００〜６００が適正であ
る。水に対するＰＶＡの添加量は１０〜４０ｐｐｍの添
加範囲では放電試験による電圧特性に問題はなく、特に
スプレーガンの操作性から１０〜２０ｐｐｍが適正であ
る。Further, the molecular weight of PVA is set to 400 to 600, and the amount added to water is set to 10 to 40 ppm. If the molecular weight of PVA is less than 300, the heat resistance is inferior, and if it is more than 700, the solubility in water deteriorates, and it cannot be adopted, and the molecular weight of 400 to 600 is appropriate. If the amount of PVA added to water is in the range of 10 to 40 ppm, there is no problem in the voltage characteristics by the discharge test, and particularly, 10 to 20 ppm is appropriate from the viewpoint of the operability of the spray gun.
【００１４】また、活性炭粉末の水に対する配合量を重
量比で１７．５〜２２．５％とするものである。これ
は、スプレーガン先端のノズル噴射状態を評価すること
より、液垂れやノズル詰まりが少なくスプレーガンの操
作性が良いことから１７．５〜２２．５％が適正であ
る。The amount of the activated carbon powder in water is 17.5 to 22.5% by weight. This is from 17.5 to 22.5% because the dripping and nozzle clogging are small and the operability of the spray gun is good by evaluating the nozzle ejection state at the tip of the spray gun.
【００１５】[0015]
【実施例】以下、本発明の実施例について説明する。 （実施例１）ＰＶＡの分子量が３００、４００、５０
０、６００、７００のものについて、水に対する溶解性
と耐熱性を試験した。その試験方法は、ＰＶＡを常温の
水２００ミリリットルが入っているビ−カ−に投入し撹
拌しながら約８０℃まで加温し、その後自然冷却して水
に対する各ＰＶＡの溶解性を評価した。また、耐熱性に
ついては、上記各分子量のＰＶＡ５０ｇをビ−カ−にと
り１００℃で３時間加熱しＰＶＡ変色の有無により評価
した。その結果を（表１）に示す。Embodiments of the present invention will be described below. (Example 1) Molecular weight of PVA is 300, 400, 50
About 0, 600, and 700, the solubility in water and the heat resistance were tested. In the test method, PVA was charged into a beaker containing 200 ml of water at room temperature, heated to about 80 ° C. with stirring, and then naturally cooled to evaluate the solubility of each PVA in water. The heat resistance was evaluated by taking 50 g of PVA of each molecular weight in a beaker, heating at 100 ° C. for 3 hours, and evaluating the presence or absence of PVA discoloration. The results are shown in (Table 1).
【００１６】[0016]
【表１】 [Table 1]
【００１７】（表１）において、溶解性は全て溶解した
ものに○印、部分溶解のものに×印を示し、耐熱性はＰ
ＶＡが変色しなかったものに○印、ＰＶＡが熱劣化し変
色（黄白色）したものに△印とした。In Table 1, the solubility is indicated by ○ for all dissolved, the cross is indicated for partially dissolved, and the heat resistance is P
も の indicates that the VA did not change color, and △ indicates that the PVA changed color (yellowish white) due to thermal degradation.
【００１８】（表１）の結果から、ＰＶＡの水に対する
溶解性はその分子量の違いによって異なり、分子量の小
さいものが水に溶解されやすく、分子量７００では部分
溶解であった。一方、ＰＶＡの耐熱性は分子量の小さい
ものは耐熱性に劣り、分子量３００では熱劣化が起こり
黄白色に変色した。これらのことから、ＰＶＡの分子量
は４００〜６００が好ましい。 （実施例２）水に対する適正な活性炭粉末の配合量を検
討した。試験は図１に示す試験装置を用いて行った。図
１は、本発明の実施例における試験装置の構成図であ
る。図１において、１は正極体、２はタ−ンテ−ブル、
３は活性炭粉末付着防止カバ−、４はスプレ−ガン、５
は圧縮空気供給配管、６は活性剤を収納している容器、
７は前記１〜６を納めるドラフタ−である。以上のよう
に構成された装置の動作について説明をする。タ−ンテ
−ブル２の上に正極体１を置き、その正極体１に活性炭
粉末付着防止カバ−３を被せたあと、タ−ンテ−ブル２
を手動で回転させながらスプレ−ガン４（以下、ガンと
いう）に連結されている圧縮空気供給配管５から圧縮空
気を容器６に供給してガン４の先端のノズルから活性剤
を正極体１の反応面に吹き付ける。吹き付けで発生する
霧や粉塵はドラフタ−７で排気する。試験には比表面積
が３０〜６０ｇ／ｍ2の活性炭粉末を、水として水道水
を用いた。水１リットルに活性炭を所定量投入し、よく
撹拌棒でかき混ぜて活性炭粉末を分散させた分散液をガ
ンの先端ノズルから正極体に吹き付け、前記ノズルから
の分散液の噴射状態と活性炭の付着量から、水に対する
活性炭粉末の適正配合量を検討した。その結果を（表
２）に示す。From the results shown in Table 1, the solubility of PVA in water differs depending on the difference in the molecular weight. Those having a small molecular weight are easily dissolved in water, and those having a molecular weight of 700 are partially dissolved. On the other hand, the heat resistance of PVA having a small molecular weight was inferior to that of PVA, and when the molecular weight was 300, thermal degradation occurred and the color changed to yellowish white. From these, the molecular weight of PVA is preferably from 400 to 600. (Example 2) An appropriate amount of activated carbon powder in water was examined. The test was performed using the test device shown in FIG. FIG. 1 is a configuration diagram of a test apparatus according to an embodiment of the present invention. In FIG. 1, 1 is a positive electrode body, 2 is a turntable,
3 is a cover for preventing the adhesion of activated carbon powder, 4 is a spray gun, 5
Is a compressed air supply pipe, 6 is a container containing an activator,
Reference numeral 7 denotes a drafter for accommodating the above items 1 to 6. The operation of the device configured as described above will be described. The positive electrode body 1 is placed on the turntable 2, and the positive electrode body 1 is covered with an activated carbon powder adhesion preventing cover 3.
The compressed air is supplied to a container 6 from a compressed air supply pipe 5 connected to a spray gun 4 (hereinafter, referred to as a gun) while manually rotating the spray gun 4 (hereinafter, referred to as a gun). Spray on reaction surface. Mist and dust generated by spraying are exhausted by the drafter 7. In the test, activated carbon powder having a specific surface area of 30 to 60 g / m 2 was used, and tap water was used as water. A predetermined amount of activated carbon is poured into 1 liter of water, and a dispersion liquid in which activated carbon powder is dispersed by thoroughly stirring with a stirring rod is sprayed from a nozzle at the tip of a gun onto a positive electrode body. Therefore, the appropriate blending amount of activated carbon powder with respect to water was examined. The results are shown in (Table 2).
【００１９】[0019]
【表２】 [Table 2]
【００２０】（表２）において、噴射状態はスプレ−ガ
ンの先端ノズルから活性炭の分散液を噴射した時に、○
印は問題なし、△印は液垂れが多い、×印はノズルの詰
まりが多いを示す。また、活性炭の付着量は、活性炭粉
末を吹き付けて乾燥した後の正極体１個当たりの付着量
を示す。In Table 2, when the sprayed liquid was sprayed from the spray nozzle at the tip nozzle of the spray gun,
The mark indicates no problem, the mark .DELTA. Indicates that the liquid is dripping, and the mark X indicates that the nozzle is often clogged. The attached amount of activated carbon indicates the attached amount per one positive electrode body after the activated carbon powder is sprayed and dried.
【００２１】（表２）の結果から、水に対する活性炭の
配合量は、スプレ−ガン先端のノズル噴射状態から重量
比で１７．５〜２２．５％が適当であると分かる。その
時の活性炭粉末の正極体１個当たりの付着量は０．０２
〜０．０５ｇ／ｃｍ2であり、従来法の溶剤に活性炭粉
末を分散させた分散液により作製した場合の０．０５〜
０．０８ｇ／ｃｍ2に比べ減少していることがわかる。
これは最小限の活性炭粉末で放電特性の安定化を図り、
材料コストの低減および吹き付け時間の短縮が改善され
ていることが分かる。 （実施例３）水は水道水、活性炭粉末は比表面積が３０
〜６０ｇ／ｍ2、ＰＶＡは分子量が５００のものを用
い、水に対するＰＶＡの適正な添加量を検討した。その
試験方法は、活性炭粉末と水の配合比率は重量比で活性
炭粉末１に対し水５とし、水１リットルに対するＰＶＡ
の添加量を０ｍｇ，１０ｍｇ，２０ｍｇ，４０ｍｇ，６
０ｍｇ，８０ｍｇ，１００ｍｇとした。そして、ＰＶＡ
の添加量とガン先端のノズル詰まり状態や正極体乾燥
後、活性炭粉末吹き付け部への水の霧吹きテストによる
濡れ性評価を行った。また実際に電池を組み立て片側１
５°の傾きで１５秒に１回のサイクルで１時間電池を揺
動させ粉末脱落の有無とその影響による電解液の濁り状
態を振動テストにより検討した。その結果を（表３）に
示す。From the results shown in Table 2, it is understood that the appropriate amount of the activated carbon to water is 17.5 to 22.5% by weight based on the state of spraying the nozzle at the tip of the spray gun. At this time, the amount of the activated carbon powder attached per cathode body was 0.02.
0.05 g / cm 2, which is 0.05 to 0.05 g / cm 2 when prepared using a dispersion in which activated carbon powder is dispersed in a conventional solvent.
It can be seen that it is smaller than 0.08 g / cm 2 .
This stabilizes the discharge characteristics with a minimum of activated carbon powder,
It can be seen that the reduction of the material cost and the shortening of the spraying time are improved. (Example 3) Water is tap water and activated carbon powder has a specific surface area of 30.
６０60 g / m 2 , PVA having a molecular weight of 500 was used, and the appropriate amount of PVA added to water was examined. The test method was as follows: the mixing ratio of activated carbon powder and water was 1 weight of activated carbon powder to 5 water, and 1 liter of water was PVA.
0 mg, 10 mg, 20 mg, 40 mg, 6
0 mg, 80 mg, and 100 mg were used. And PVA
After the addition amount and the state of clogging of the nozzle at the tip of the gun and the drying of the positive electrode body, the wettability of the activated carbon powder sprayed portion was evaluated by a spray test of water. Also, actually assemble the battery, one side
The battery was rocked at a tilt of 5 ° once every 15 seconds for 1 hour, and the presence / absence of powder falling off and the turbid state of the electrolyte due to the influence were examined by a vibration test. The results are shown in (Table 3).
【００２２】[0022]
【表３】 [Table 3]
【００２３】（表３）において、○印は全個数問題な
し、△印はばらつきがある、×印は採用不可を示す。In Table 3, ○ indicates that there is no problem with the total number, Δ indicates that there is a variation, and X indicates that no adoption is possible.
【００２４】（表３）の結果から、水に対するＰＶＡの
添加量が増加するとスプレ−ガン先端ノズルの詰まりが
起こり、ＰＶＡの添加量が６０ｍｇになるとノズルの詰
まりが起こりはじめ、８０ｍｇ以上では噴射が非常に困
難であった。一方、霧吹きテスト及び振動テストから、
水に１０ｍｇ以上のＰＶＡを添加することで反応面に吹
き付けた活性炭粉末の水に対する濡れ性及び付着力が改
善されていることが分かる。 （実施例４）水１リットルに対するＰＶＡの添加量を１
０〜４０ｍｇとした以外は実施例３と同様にして正極体
を作り、これを用いて本発明の電池を作製した。また、
従来法の溶剤に活性炭粉末を分散させた分散液により作
成した正極体を用いて従来の電池を作製した。これら電
池を１. ０Ａで連続放電試験をした。その結果を（表
４）に示す。From the results shown in Table 3, when the amount of PVA added to water increases, the nozzle of the spray gun tip becomes clogged, and when the amount of PVA becomes 60 mg, the nozzle begins to clog. It was very difficult. On the other hand, from the spray test and vibration test,
It can be seen that the addition of 10 mg or more of PVA to water improves the wettability and adhesion of the activated carbon powder sprayed on the reaction surface to water. (Example 4) The amount of PVA added to 1 liter of water was 1
A positive electrode body was prepared in the same manner as in Example 3 except that the amount was set to 0 to 40 mg, and the battery of the present invention was prepared using this. Also,
A conventional battery was manufactured using a positive electrode body prepared from a dispersion of activated carbon powder dispersed in a conventional solvent. These batteries were subjected to a continuous discharge test at 1.0 A. The results are shown in (Table 4).
【００２５】[0025]
【表４】 [Table 4]
【００２６】（表４）の結果から、水に対するＰＶＡの
添加量が１０ｐｐｍ〜４０ｐｐｍでは、従来法と大差が
なく、若干ではあるが２０ｍｇ以上になると本発明の電
池の方が端子電圧が高くなることがわかった。From the results shown in Table 4, when the amount of PVA added to water is 10 ppm to 40 ppm, there is no significant difference from the conventional method. When the amount is slightly more than 20 mg, the terminal voltage of the battery of the present invention becomes higher. I understand.
【００２７】また、ｎ＝５の電池においては、ＰＶＡを
２０ｐｐｍ〜４０ｐｐｍ添加したものは放電電圧のばら
つきが従来法にくらべ小さくなっていることがわかっ
た。Further, it was found that in the battery with n = 5, the dispersion of the discharge voltage was smaller in the case where PVA was added in an amount of 20 ppm to 40 ppm than in the conventional method.
【００２８】[0028]
【発明の効果】以上のように本発明によれば、水にＰＶ
Ａを必要量添加した水溶液に活性炭粉末を分散させた活
性剤を反応面に吹き付けることで、空気電池の放電特性
を改善することができ、加えて、製造工程における環境
負荷の極めて小さい正極体の製造法を提供できる。As described above, according to the present invention, PV is added to water.
By spraying an activator in which activated carbon powder is dispersed in an aqueous solution to which a required amount of A has been added, onto the reaction surface, the discharge characteristics of the air battery can be improved. Manufacturing methods can be provided.
【図１】本発明の実施例における装置の構成図FIG. 1 is a configuration diagram of an apparatus according to an embodiment of the present invention.
１ 正極体 ４ スプレ−ガン 1 positive electrode body 4 spray gun
Claims (3)
との混合物からなる液状の表面活性材料を正極体表面に
塗布した後、乾燥させることを特徴とする空気電池正極
体の製造法。1. A method for producing a cathode body of an air battery, comprising applying a liquid surface active material comprising a mixture of water, polyvinyl alcohol and activated carbon powder to the surface of the cathode body, followed by drying.
〜６００であり、水に対する添加量が１０〜４０ｐｐｍ
であることを特徴とする請求項１記載の空気電池正極体
の製造法。2. Polyvinyl alcohol having a molecular weight of 400
~ 600, the amount added to water is 10 to 40 ppm
The method for producing an air battery positive electrode body according to claim 1, wherein
で１７. ５〜２２. ５％であることを特徴とする請求項
１記載の空気電池正極体の製造法。3. The method according to claim 1, wherein the amount of the activated carbon powder relative to water is 17.5 to 22.5% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9136394A JPH10326631A (en) | 1997-05-27 | 1997-05-27 | Manufacturing method of air battery cathode body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9136394A JPH10326631A (en) | 1997-05-27 | 1997-05-27 | Manufacturing method of air battery cathode body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10326631A true JPH10326631A (en) | 1998-12-08 |
Family
ID=15174140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9136394A Pending JPH10326631A (en) | 1997-05-27 | 1997-05-27 | Manufacturing method of air battery cathode body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10326631A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001143770A (en) * | 1999-11-17 | 2001-05-25 | Toshiba Battery Co Ltd | Air cell |
| EP0969540A3 (en) * | 1998-06-05 | 2002-04-24 | Nisshinbo Industries, Inc. | Fuel cell separator and process for producing same |
| WO2002054510A1 (en) * | 2000-12-29 | 2002-07-11 | Allied Ray Technology Co., Ltd. | Apparatus for drying electrode, system for manufacturing electrode using the apparatus, and method of drying electrode |
-
1997
- 1997-05-27 JP JP9136394A patent/JPH10326631A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0969540A3 (en) * | 1998-06-05 | 2002-04-24 | Nisshinbo Industries, Inc. | Fuel cell separator and process for producing same |
| JP2001143770A (en) * | 1999-11-17 | 2001-05-25 | Toshiba Battery Co Ltd | Air cell |
| WO2002054510A1 (en) * | 2000-12-29 | 2002-07-11 | Allied Ray Technology Co., Ltd. | Apparatus for drying electrode, system for manufacturing electrode using the apparatus, and method of drying electrode |
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