JP2000133258A - Positive plate for alkaline storage battery and its manufacture - Google Patents
Positive plate for alkaline storage battery and its manufactureInfo
- Publication number
- JP2000133258A JP2000133258A JP10308833A JP30883398A JP2000133258A JP 2000133258 A JP2000133258 A JP 2000133258A JP 10308833 A JP10308833 A JP 10308833A JP 30883398 A JP30883398 A JP 30883398A JP 2000133258 A JP2000133258 A JP 2000133258A
- Authority
- JP
- Japan
- Prior art keywords
- nickel
- storage battery
- positive electrode
- electrode plate
- alkaline storage
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ニッケルー水素蓄
電池、ニッケルーカドミウム蓄電池などのアルカリ蓄電
池用正極板、特にその製造方法に関するものである。The present invention relates to a positive electrode plate for an alkaline storage battery such as a nickel-hydrogen storage battery and a nickel-cadmium storage battery, and more particularly to a method of manufacturing the same.
【０００２】[0002]
【従来の技術】アルカリ蓄電池の正極板に用いる多孔性
基板は、一般的に、鋼板上にニッケルめっきを施した芯
材に、ニッケル粉末を増粘剤となる樹脂成分と共にスラ
リーにして塗布・乾燥した後、水素を含む還元雰囲気中
で焼結することによって製造される。量産性の観点か
ら、通常は、長尺の芯材を用いてロールトゥーロールで
の連続生産が行われている。アルカリ蓄電池用正極板
は、このようにして得られた多孔性焼結基板の空孔内に
活物質となる水酸化ニッケルを充填した後、化成処理を
経て、単セルのサイズに切断することにより製造され
る。2. Description of the Related Art Generally, a porous substrate used as a positive electrode plate of an alkaline storage battery is formed by applying a nickel powder on a steel plate to a core material in a slurry together with a resin component serving as a thickener, followed by coating and drying. Then, it is manufactured by sintering in a reducing atmosphere containing hydrogen. From the viewpoint of mass productivity, usually, continuous production by roll-to-roll is performed using a long core material. The positive electrode plate for an alkaline storage battery is obtained by filling the pores of the porous sintered substrate obtained as described above with nickel hydroxide as an active material, and then, after a chemical conversion treatment, cutting into a single cell size. Manufactured.
【０００３】前述のようにして製造される従来のアルカ
リ蓄電池用正極板は、単セルのサイズへの切断による端
面部分で、芯材を構成する鋼板が露出している。鋼板が
露出したアルカリ蓄電池用正極板は、放置時の吸湿によ
り水酸化ニッケルの異常析出が起こる。そして、特に電
極表面部分に析出した水酸化ニッケルは、電池構成時に
セパレーターを突破り、負極と接触するため、リーク不
良の原因になっている。水酸化ニッケルの異常析出の要
因は、以下のように推定される。すなわち、鉄とオキシ
水酸化ニッケルは局部電池を形成しやすく、鉄が露出し
たアルカリ蓄電池用正極板が吸湿すると、局部カソード
となるオキシ水酸化ニッケルの還元反応と、局部アノー
ドとなる鉄の溶解反応が起こる。鉄が溶解すると、鉄と
水酸イオンによる錯体の形成により、鉄露出部の近傍の
液相は酸性を呈する。液相が酸性を呈することにより、
焼結体を構成するニケッルの溶解が促進される。ニッケ
ルイオンも水酸イオンと錯体を形成するが、溶解度積が
小さいため水酸化ニッケルが直ちに沈殿する。ニッケル
（比重：８．８５）の溶解に起因する水酸化ニッケル
（比重：３．６５）の沈殿析出では、体積膨張が起こる
ため、水酸化ニッケルは多孔性基板の表面部分に押し出
される。[0003] In the conventional positive electrode plate for an alkaline storage battery manufactured as described above, a steel plate constituting a core material is exposed at an end face portion by cutting into a single cell size. In the positive electrode plate for an alkaline storage battery in which the steel sheet is exposed, abnormal precipitation of nickel hydroxide occurs due to moisture absorption during standing. In particular, nickel hydroxide precipitated on the surface of the electrode breaks through the separator during the construction of the battery and comes into contact with the negative electrode, thereby causing a leak failure. The cause of abnormal precipitation of nickel hydroxide is estimated as follows. That is, iron and nickel oxyhydroxide easily form a local battery, and when the positive electrode plate for an alkaline storage battery with exposed iron absorbs moisture, a reduction reaction of nickel oxyhydroxide that becomes a local cathode and a dissolution reaction of iron that becomes a local anode Happens. When iron dissolves, the liquid phase near the exposed iron portion becomes acidic due to the formation of a complex between iron and hydroxide ions. The liquid phase is acidic,
The dissolution of nickel constituting the sintered body is promoted. Nickel ions also form complexes with hydroxide ions, but nickel hydroxide precipitates immediately because of its low solubility product. In the precipitation of nickel hydroxide (specific gravity: 3.65) caused by dissolution of nickel (specific gravity: 8.85), volume expansion occurs, so that nickel hydroxide is extruded to the surface of the porous substrate.
【０００４】このように、従来技術によるアルカリ蓄電
池用正極板では、放置時の吸湿により水酸化ニッケルが
異常析出し、電池構成時にリーク不良が多発する。その
ため、アルカリ蓄電池用正極板作製後の放置環境および
電池構成の作業環境を低湿度に保持したり、放置時間お
よび作業時間を短縮したりするなど、様々な対策が講じ
られているものの、抜本解決には至っていない。As described above, in the positive electrode plate for an alkaline storage battery according to the prior art, nickel hydroxide is abnormally deposited due to moisture absorption during standing, and leakage failure frequently occurs when the battery is constructed. For this reason, various measures have been taken, such as keeping the environment left after the production of the positive electrode plate for alkaline storage batteries and the working environment of the battery configuration at low humidity, and shortening the time left unattended and the work time. Has not been reached.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上記従来の
課題を解決するためのもので、放置時の吸湿による水酸
化ニッケルの異常析出がなく、放置環境や放置期間など
に関する制約を必要としないアルカリ蓄電池用正極板を
提供することを目的とする。本発明は、リーク不良の起
こりにくいアルカリ蓄電池を与えるアルカリ蓄電池用正
極板の製造法を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and does not cause abnormal precipitation of nickel hydroxide due to moisture absorption during standing, and requires restrictions on the standing environment and the standing period. It is an object of the present invention to provide a positive electrode plate for an alkaline storage battery that does not have a negative electrode. An object of the present invention is to provide a method for producing a positive electrode plate for an alkaline storage battery, which provides an alkaline storage battery in which leak failure is unlikely to occur.
【０００６】[0006]
【課題を解決するための手段】前記目的を達成するた
め、本発明は、上記単セルのサイズへの切断による端面
部分を樹脂材料で被覆することとした。すなわち、本発
明のアルカリ蓄電池用正極板は、ニッケルめっき鋼板製
芯材を含むニッケル焼結体からなる多孔性基板、および
前記多孔性基板に充填されたニッケルの水酸化物からな
る活物質を具備し、前記芯材を個片に切断した端面部分
が樹脂材料によって被覆されていることを特徴とする。
また、本発明のアルカリ蓄電池用正極板の製造方法は、
ニッケルめっき鋼板製芯材を含むニッケル焼結体からな
る多孔性基板に、ニッケルの水酸化物からなる活物質を
充填する工程、前記ニッケルの水酸化物を化成処理する
工程、個片に切断する工程、および前記切断による端面
部分を樹脂材料により被覆する工程を有する。本発明
は、また上記の正極板を備えたニッケルー水素蓄電池、
ニッケルーカドミウム蓄電池などのアルカリ蓄電池を提
供する。In order to achieve the above-mentioned object, according to the present invention, an end face portion of the above-described single cell cut into a size is coated with a resin material. That is, the positive electrode plate for an alkaline storage battery of the present invention includes a porous substrate formed of a nickel sintered body including a core material made of a nickel-plated steel sheet, and an active material formed of a hydroxide of nickel filled in the porous substrate. An end face portion obtained by cutting the core into individual pieces is covered with a resin material.
Further, the method for producing a positive electrode plate for an alkaline storage battery of the present invention,
A step of filling a porous substrate made of a nickel sintered body including a core material made of nickel-plated steel sheet with an active material made of nickel hydroxide, a step of forming a chemical treatment of the nickel hydroxide, and cutting into pieces And a step of coating an end face portion by the cutting with a resin material. The present invention also provides a nickel-metal hydride storage battery including the above-described positive electrode plate,
Provide alkaline storage batteries such as nickel-cadmium storage batteries.
【０００７】本発明によれば、放置時の吸湿による水酸
化ニッケルの異常析出がなく、放置環境や放置期間など
に関する制約を必要としないアルカリ蓄電池用正極板が
得られる。また、この正極板を用いることにより、リー
ク不良の起こりにくいアルカリ蓄電池を提供することが
できる。According to the present invention, it is possible to obtain a positive electrode plate for an alkaline storage battery that does not cause abnormal precipitation of nickel hydroxide due to moisture absorption during standing and does not require restrictions on the standing environment and the standing period. Further, by using this positive electrode plate, it is possible to provide an alkaline storage battery in which leak failure is unlikely to occur.
【０００８】[0008]
【発明の実施の形態】本発明によるアルカリ蓄電池用正
極板は、電極個片の切断よる端面部分が樹脂材料により
被覆されている。この樹脂材料は、シリコーン樹脂、フ
ッ素樹脂、およびエポキシ樹脂からなる群より選択され
る少なくとも１種からなることが好ましい。これらの樹
脂材料は、絶縁性および撥水性が高いため、鉄とオキシ
水酸化ニッケル間の局部電池の形成を抑制できる。従っ
て、放置時の吸湿による水酸化ニッケルの異常析出がな
く、放置環境や放置期間などに関する制約を必要としな
い。本発明は、特に個片に切断する前の化成処理によ
り、ニッケルの水酸化物をニッケルの原子価が２を越え
る高次化合物に変換した正極板に有効である。高次のニ
ッケル水酸化物は、鉄との局部電池を形成しやすいので
ある。本発明による正極板を用いたアルカリ蓄電池は、
リーク不良が発生しにくい。また、前記切断による端面
部分を樹脂材料により被覆するには、切断による端面部
分を、前記樹脂材料のうち少なくとも１種を含む溶液に
接触させるのが好ましい。接触方法としては、切断によ
る端面に樹脂材料を噴霧、浸漬、または塗付が好まし
い。BEST MODE FOR CARRYING OUT THE INVENTION In a positive electrode plate for an alkaline storage battery according to the present invention, an end face portion obtained by cutting an electrode piece is coated with a resin material. The resin material is preferably made of at least one selected from the group consisting of a silicone resin, a fluororesin, and an epoxy resin. Since these resin materials have high insulation properties and water repellency, formation of a local battery between iron and nickel oxyhydroxide can be suppressed. Therefore, there is no abnormal precipitation of nickel hydroxide due to moisture absorption during leaving, and there is no need to restrict the leaving environment and the leaving period. The present invention is particularly effective for a positive electrode plate in which nickel hydroxide is converted into a higher-order compound having a valence of more than 2 by a chemical conversion treatment before cutting into individual pieces. Higher order nickel hydroxide tends to form a local battery with iron. The alkaline storage battery using the positive electrode plate according to the present invention,
Leak defects are less likely to occur. Further, in order to cover the end face portion by the cutting with a resin material, it is preferable that the end face portion by the cutting is brought into contact with a solution containing at least one of the resin materials. As a contact method, spraying, dipping, or applying a resin material to the end surface by cutting is preferable.
【０００９】[0009]
【実施例】以下、本発明の好ましい実施の形態を実施例
に基づいて説明する。まず、従来のアルカリ蓄電池用正
極板の作製方法について説明する。連続めっき装置を用
いて、幅約６００ｍｍ、長さ約５００ｍ、厚さ約８０μ
ｍの鋼板に、厚さ約１０μｍのニッケルめっきを施し
た。このニッケルめっき鋼板に、カーボニルニッケル粉
末とメチルセルローズと水とからなるスラリーを塗布
し、１００℃で乾燥した後、水素を含む還元雰囲気中に
おいて約１０００℃で熱処理し、多孔性焼結基板を作製
した。この多孔性基板のニッケル焼結体層の厚さは、片
面につき約３００μｍであり、約８０％の多孔度を有し
ていた。次に、この多孔性基板に活物質を充填した後、
化成処理をした。活物質の充填は、多孔性基板を、８０
℃に保持された、４．５Ｍ硝酸ニッケルと０．１Ｍ硝酸
コバルトとの混合水溶液に３分間浸漬し、８０℃で９０
分間乾燥させた後、８０℃、６．５Ｍ水酸化ナトリウム
水溶液に浸漬する操作を１０回繰り返すことにより行っ
た。また、化成処理は、電解液に８０℃、６．５Ｍ水酸
化ナトリウム水溶液を用いて、充放電を２回繰り返して
行った。なお、化成電流レートは、充電および放電とも
に１Ｃとし、ガス発生電位に達するまで通電した。この
ような条件で化成処理をした結果、活物質の外観が緑色
から黒色に変化し、活物質が２価よりも高次のニッケル
の水酸化物に置換されたことが確認された。なお、上記
のニッケルめっき処理から化成処理までの一連の工程
は、量産性の観点からロールトゥーロールの連続処理で
行った。DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below based on examples. First, a method for manufacturing a conventional positive electrode plate for an alkaline storage battery will be described. Approximately 600mm in width, 500m in length and 80μ in thickness using continuous plating equipment
m was plated with nickel having a thickness of about 10 μm. A slurry comprising carbonyl nickel powder, methyl cellulose and water is applied to this nickel-plated steel sheet, dried at 100 ° C., and then heat-treated at about 1000 ° C. in a reducing atmosphere containing hydrogen to produce a porous sintered substrate. did. The thickness of the nickel sintered body layer of this porous substrate was about 300 μm per side, and had a porosity of about 80%. Next, after filling the porous substrate with the active material,
Chemical conversion treatment was performed. The filling of the active material is carried out by
Immersed for 3 minutes in a mixed aqueous solution of 4.5 M nickel nitrate and 0.1 M cobalt nitrate kept at
After drying for minutes, the operation of immersing in a 6.5 M sodium hydroxide aqueous solution at 80 ° C. was repeated 10 times. The chemical conversion treatment was performed by repeating charging and discharging twice using a 6.5 M aqueous sodium hydroxide solution at 80 ° C. for the electrolytic solution. The formation current rate was set to 1 C for both charging and discharging, and electricity was supplied until the gas generation potential was reached. As a result of the chemical conversion treatment under such conditions, the appearance of the active material changed from green to black, and it was confirmed that the active material was replaced by nickel hydroxide having a higher order than divalent. Note that a series of steps from the nickel plating process to the chemical conversion process was performed by a roll-to-roll continuous process from the viewpoint of mass productivity.
【００１０】次に、ロールトゥーロールの連続処理で活
物質の充填および化成処理した多孔性基板を、スリット
切断することにより、単セルサイズに個片化し、従来の
アルカリ蓄電池用正極板を作製した。作製した従来のア
ルカリ蓄電池用正極板の形状は、４５ｍｍ×５４０ｍｍ
の短冊型で、４辺の端面すべてがスリット切断面となる
ように加工した。Next, the porous substrate, which has been filled with the active material and subjected to a chemical conversion treatment in a continuous roll-to-roll process, is cut into slits to be singulated into single cells, thereby producing a conventional positive electrode plate for an alkaline storage battery. . The shape of the manufactured positive electrode plate for an alkaline storage battery is 45 mm × 540 mm.
And processed so that all the end faces of the four sides become slit cut surfaces.
【００１１】《実施例１》上記ようにして作製した従来
のアルカリ蓄電池用正極板の４辺の端面部分を、シリコ
ーン樹脂で被覆して、本発明のアルカリ蓄電池用正極板
を作製した。シリコーン樹脂の被覆は、未硬化の液状シ
リコーン樹脂に、４辺の端面部分を順次浸漬（約１ｍｍ
の深さで、１分間浸漬）した後、熱硬化することにより
行った。また、シリコーン樹脂の被覆は、ゴム箆を用い
て、未硬化の液状シリコーン樹脂を４辺の端面部分に塗
付した後、熱硬化する方法、および市販のシリコーン樹
脂スプレーを用いて、シリコーン樹脂を４辺の端面部分
に噴霧する方法によっても行った。Example 1 Four sides of the conventional positive electrode plate for an alkaline storage battery prepared as described above were coated with a silicone resin to prepare a positive electrode plate for an alkaline storage battery of the present invention. The coating of the silicone resin is performed by immersing the four edge portions sequentially in an uncured liquid silicone resin (about 1 mm
Immersion at a depth of 1 minute), followed by heat curing. In addition, the silicone resin is coated by using a rubber spatula, applying an uncured liquid silicone resin to the four end faces, and then thermosetting the silicone resin using a commercially available silicone resin spray. Spraying was also performed on the four end faces.
【００１２】《実施例２》上記従来のアルカリ蓄電池用
正極板の４辺の端面部分を、フッ素樹脂で被覆して、本
発明のアルカリ蓄電池用正極板を作製した。フッ素樹脂
の被覆は、未硬化の液状フッ素樹脂に、４辺の端面部分
を順次浸漬（約１ｍｍの深さで、１分間浸漬）した後、
熱硬化することにより行った。また、フッ素樹脂の被覆
は、ゴム箆を用いて、未硬化の液状フッ素樹脂を４辺の
端面部分に塗付した後、熱硬化する方法、および市販の
フッ素樹脂スプレーを用いて、フッ素樹脂を４辺の端面
部分に噴霧する方法によっても行った。Example 2 Four sides of the conventional positive electrode plate for an alkaline storage battery were coated with a fluororesin to prepare a positive electrode plate for an alkaline storage battery of the present invention. The coating of the fluororesin is performed by sequentially immersing the end portions of the four sides in an uncured liquid fluororesin (at a depth of about 1 mm for 1 minute),
Performed by heat curing. Further, the coating of the fluororesin is performed by applying an uncured liquid fluororesin to the four end portions using a rubber spatula, and then thermosetting, or using a commercially available fluororesin spray. Spraying was also performed on the four end faces.
【００１３】《実施例３》上記従来のアルカリ蓄電池用
正極板の４辺の端面部分を、エポキシ樹脂で被覆して、
本発明のアルカリ蓄電池用正極板を作製した。エポキシ
樹脂の被覆は、未硬化の液状エポキシ樹脂に、４辺の端
面部分を順次浸漬（約１ｍｍの深さで、１分間浸漬）し
た後、熱硬化することにより行った。また、エポキシ樹
脂の被覆は、ゴム箆を用いて、未硬化の液状エポキシ樹
脂を４辺の端面部分に塗付した後、熱硬化する方法によ
っても行った。<< Embodiment 3 >> Four sides of the conventional positive electrode plate for an alkaline storage battery are covered with an epoxy resin.
A positive electrode plate for an alkaline storage battery of the present invention was produced. The coating of the epoxy resin was performed by sequentially immersing the end faces of the four sides in an uncured liquid epoxy resin (immersion at a depth of about 1 mm for one minute) and then thermosetting. The epoxy resin was also coated by a method in which an uncured liquid epoxy resin was applied to end portions of four sides using a rubber spatula and then thermally cured.
【００１４】作製した各アルカリ蓄電池用正極板につい
て、放置試験を行うことにより、水酸化ニッケルの異常
析出の発生頻度を測定した。放置試験には、各水準と
も、１００個のアルカリ蓄電池用正極板をサンプルとし
て投入し、一定放置条件で、２４０時間放置後に、サン
プルの外観を観察した。外観観察の結果から、水酸化ニ
ッケルの異常析出が発生したサンプル数を確認し、異常
析出の発生頻度（％）とした。なお、放置条件は温度３
０℃ー相対湿度２０％、温度３０℃ー相対湿度６０％、
および温度３０℃ー相対湿度９０％の３水準とした。表
１は放置試験の結果を示している。表１に示すように、
端面部分を樹脂材料により被覆していない従来のアルカ
リ蓄電池用正極板では、放置条件が温度３０℃ー相対湿
度２０％で、異常析出の発生頻度が３％となった。放置
条件が高湿度になるにしたがって、異常析出の発生頻度
が高くなり、温度３０℃ー相対湿度９０％の放置条件で
は、発生頻度が１００％になった。The frequency of occurrence of abnormal precipitation of nickel hydroxide was measured by performing a standing test on each of the prepared positive plates for alkaline storage batteries. In each of the standing tests, 100 samples of the positive electrode plates for alkaline storage batteries were charged as samples for each level, and the appearance of the samples was observed after standing for 240 hours under a constant standing condition. From the results of the appearance observation, the number of samples in which abnormal precipitation of nickel hydroxide occurred was confirmed, and the frequency of occurrence of abnormal precipitation (%) was determined. In addition, the leaving condition is temperature 3
0 ° C-20% relative humidity, 30 ° C-60% relative humidity,
And three levels of a temperature of 30 ° C. and a relative humidity of 90%. Table 1 shows the results of the standing test. As shown in Table 1,
In the conventional positive electrode plate for an alkaline storage battery in which the end face portion was not covered with the resin material, the temperature was 30 ° C. and the relative humidity was 20%, and the frequency of occurrence of abnormal deposition was 3%. The frequency of occurrence of abnormal deposition increased as the storage condition increased, and the frequency of occurrence increased to 100% under the storage condition of a temperature of 30 ° C. and a relative humidity of 90%.
【００１５】これに対し、端面部分を樹脂材料により被
覆した本発明のアルカリ蓄電池用正極板では、温度３０
℃ー相対湿度９０％の放置条件でも、水酸化ニッケルの
異常析出はまったく確認されなかった。上記のように、
アルカリ蓄電池用正極板の端面部分を樹脂材料で被覆す
ることによって、放置による水酸化ニッケルの異常析出
が抑制された。これは樹脂材料の絶縁性および撥水性に
より、鉄とオキシ水酸化ニッケル間の局部電池の形成が
抑制されたことに起因するもので、このような構造とす
ることにより、放置環境や放置期間などに関する制約を
必要としないアルカリ蓄電池用正極板を実現することが
できた。On the other hand, in the positive electrode plate for an alkaline storage battery of the present invention in which the end face portion is covered with a resin material, the temperature is 30
No abnormal precipitation of nickel hydroxide was observed at all even under the condition of standing at 90 ° C. and a relative humidity of 90%. As described above,
By coating the end surface of the positive electrode plate for an alkaline storage battery with a resin material, abnormal precipitation of nickel hydroxide due to standing was suppressed. This is due to the fact that the formation of a local battery between iron and nickel oxyhydroxide was suppressed due to the insulating properties and water repellency of the resin material. Thus, a positive electrode plate for an alkaline storage battery that does not require restrictions on the present invention can be realized.
【００１６】《実施例４》実施例１〜３で作製した本発
明のアルカリ蓄電池用正極板および従来のアルカリ蓄電
池用正極板を用いて、それぞれアルカリ蓄電池を作製し
た。同一条件で作製した水素吸蔵合金（ＭｍＮｉ3.55Ｍ
ｎ0.4Ａｌ0.3Ｃｏ0.75）からなる負極、ポリプロピレン
不織布からなるセパレータ、水酸化カリウム水溶液から
なる電解液、および上記各正極板を同一条件で組み合わ
せてアルカリ蓄電池を各１００個作製した。Example 4 Alkaline storage batteries were manufactured using the positive electrode plate for an alkaline storage battery of the present invention prepared in Examples 1 to 3 and the conventional positive electrode plate for an alkaline storage battery. Hydrogen storage alloy (MmNi 3.55 M
A negative electrode composed of n 0.4 Al 0.3 Co 0.75 ), a separator composed of a polypropylene non-woven fabric, an electrolytic solution composed of an aqueous solution of potassium hydroxide, and the above-described positive electrode plates were combined under the same conditions to produce 100 alkaline storage batteries.
【００１７】作製した各アルカリ蓄電池のリーク不良を
測定した結果、従来のアルカリ蓄電池用正極板を用いた
アルカリ蓄電池では、リーク不良が８％発生した。これ
に対し、本発明のアルカリ蓄電池用正極板を用いたアル
カリ蓄電池では、リーク不良がまったく発生しなかっ
た。なお、不良発生したアルカリ蓄電池の不良解析を行
った結果、正極板から異常析出した水酸化ニッケルが原
因であることが明らかになった。上記のように、端面部
分を樹脂材料で被覆したアルカリ蓄電池用正極板を用い
ることにより、水酸化ニッケルの異常析出が抑制され、
リーク不良の起こりにくいアルカリ蓄電池を実現するこ
とができた。As a result of measuring the leak failure of each of the manufactured alkaline storage batteries, 8% of the leak failure occurred in the alkaline storage battery using the conventional alkaline storage battery positive electrode plate. On the other hand, in the alkaline storage battery using the positive electrode plate for an alkaline storage battery of the present invention, no leak failure occurred. In addition, as a result of performing a failure analysis of the failed alkaline storage battery, it was found that the cause was nickel hydroxide abnormally precipitated from the positive electrode plate. As described above, by using the positive electrode plate for an alkaline storage battery whose end face portion is coated with a resin material, abnormal precipitation of nickel hydroxide is suppressed,
It was possible to realize an alkaline storage battery in which leak failure is unlikely.
【００１８】[0018]
【発明の効果】以上のように本発明によれば、放置時の
吸湿による水酸化ニッケルの異常析出がなく、放置環境
や放置期間などに関する制約が不要なアルカリ蓄電池用
焼結式正極板を提供することができる。従って、本発明
によれば、水酸化ニッケルの異常析出が要因となるリー
ク不良が起こりにくいアルカリ蓄電池が得られる。As described above, according to the present invention, there is provided a sintered positive electrode plate for an alkaline storage battery, which does not cause abnormal precipitation of nickel hydroxide due to moisture absorption at the time of standing and does not require restrictions on the leaving environment and the leaving period. can do. Therefore, according to the present invention, it is possible to obtain an alkaline storage battery in which a leak failure caused by abnormal precipitation of nickel hydroxide is unlikely to occur.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 棚橋 正和 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 貝田 理 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 村上 義樹 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 丸田 雅義 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 Ｆターム(参考） 5H003 AA06 AA08 BA02 BA04 BA07 BB04 BB11 BB48 BC05 BD00 5H016 AA02 AA06 BB00 BB04 BB08 BB09 BB10 BB14 CC01 EE05 EE09 HH15 5H017 AA02 AS01 AS10 BB08 BB13 BB14 CC27 DD06 EE04 EE07 HH05 5H028 AA01 AA05 BB00 BB03 BB10 CC08 CC12 EE05 EE06 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masakazu Tanahashi 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 72) Inventor Yoshiki Murakami 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. BA04 BA07 BB04 BB11 BB48 BC05 BD00 5H016 AA02 AA06 BB00 BB04 BB08 BB09 BB10 BB14 CC01 EE05 EE09 HH15 5H017 AA02 AS01 AS10 BB08 BB13 BB14 CC27 DD06 EE04 EE07 HH05 5H028 BB00 BB01 CC05
Claims (6)
ル焼結体からなる多孔性基板、および前記多孔性基板に
充填されたニッケルの水酸化物からなる活物質を具備
し、前記芯材を個片に切断した端面部分が樹脂材料によ
って被覆されていることを特徴とするアルカリ蓄電池用
正極板。1. A porous substrate comprising a nickel sintered body including a core material made of a nickel-plated steel sheet, and an active material comprising a hydroxide of nickel filled in the porous substrate. A positive electrode plate for an alkaline storage battery, wherein an end surface portion cut into pieces is covered with a resin material.
樹脂、およびエポキシ樹脂からなる群より選択される少
なくとも１種である請求項１に記載のアルカリ蓄電池用
正極板。2. The positive electrode plate for an alkaline storage battery according to claim 1, wherein the resin material is at least one selected from the group consisting of a silicone resin, a fluororesin, and an epoxy resin.
を越える高次化合物である請求項１に記載のアルカリ蓄
電池用正極板。3. The method according to claim 2, wherein the hydroxide has a valence of nickel of 2
The positive electrode plate for an alkaline storage battery according to claim 1, wherein the positive electrode plate is a higher order compound exceeding
ル焼結体からなる多孔性基板に、ニッケルの水酸化物か
らなる活物質を充填する工程、前記ニッケルの水酸化物
を化成処理する工程、個片に切断する工程、および前記
切断による端面部分を樹脂材料により被覆する工程を有
することを特徴とするアルカリ蓄電池用正極板の製造方
法。4. A step of filling a porous substrate made of a nickel sintered body containing a core material made of a nickel-plated steel sheet with an active material made of a nickel hydroxide, and a step of subjecting the nickel hydroxide to a chemical conversion treatment. A method for producing a positive electrode plate for an alkaline storage battery, comprising: a step of cutting into individual pieces; and a step of covering an end face portion by the cutting with a resin material.
樹脂、およびエポキシ樹脂からなる群より選択される少
なくとも１種であり、噴霧、浸漬または塗付により前記
樹脂材料を被覆する請求項４記載のアルカリ蓄電池用正
極板の製造方法。5. The alkali according to claim 4, wherein the resin material is at least one selected from the group consisting of a silicone resin, a fluororesin, and an epoxy resin, and coats the resin material by spraying, dipping or coating. A method for producing a positive electrode plate for a storage battery.
を備えたアルカリ蓄電池。6. An alkaline storage battery provided with the positive electrode plate according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10308833A JP2000133258A (en) | 1998-10-29 | 1998-10-29 | Positive plate for alkaline storage battery and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10308833A JP2000133258A (en) | 1998-10-29 | 1998-10-29 | Positive plate for alkaline storage battery and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000133258A true JP2000133258A (en) | 2000-05-12 |
Family
ID=17985851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10308833A Pending JP2000133258A (en) | 1998-10-29 | 1998-10-29 | Positive plate for alkaline storage battery and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000133258A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006236865A (en) * | 2005-02-25 | 2006-09-07 | Furukawa Battery Co Ltd:The | Manufacturing method of paste type electrode plate and alkaline storage battery using it |
| WO2014038681A1 (en) * | 2012-09-07 | 2014-03-13 | 国立大学法人京都大学 | Electrode for primary battery or secondary battery having controlled local battery reaction, and primary or secondary battery using said electrode |
| WO2016140168A1 (en) * | 2015-03-04 | 2016-09-09 | Ｊｘエネルギー株式会社 | Composite film and method for manufacturing same |
-
1998
- 1998-10-29 JP JP10308833A patent/JP2000133258A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006236865A (en) * | 2005-02-25 | 2006-09-07 | Furukawa Battery Co Ltd:The | Manufacturing method of paste type electrode plate and alkaline storage battery using it |
| WO2014038681A1 (en) * | 2012-09-07 | 2014-03-13 | 国立大学法人京都大学 | Electrode for primary battery or secondary battery having controlled local battery reaction, and primary or secondary battery using said electrode |
| JPWO2014038681A1 (en) * | 2012-09-07 | 2016-08-12 | 国立大学法人京都大学 | Primary battery or secondary battery electrode in which local battery reaction is controlled, and primary battery or secondary battery using the electrode |
| JP2022019898A (en) * | 2012-09-07 | 2022-01-27 | 一般社団法人イノベーションエネルギー | Electrode for primary battery or secondary battery with controlled local battery reaction and primary battery or secondary battery using the electrode |
| JP7290229B2 (en) | 2012-09-07 | 2023-06-13 | 一般社団法人イノベーションエネルギー | Primary or secondary battery electrode with controlled local cell reaction and primary or secondary battery using the electrode |
| WO2016140168A1 (en) * | 2015-03-04 | 2016-09-09 | Ｊｘエネルギー株式会社 | Composite film and method for manufacturing same |
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