JPH09147857A - Manufacture of positive electrode active material for alkaline storage battery - Google Patents
Manufacture of positive electrode active material for alkaline storage batteryInfo
- Publication number
- JPH09147857A JPH09147857A JP7300137A JP30013795A JPH09147857A JP H09147857 A JPH09147857 A JP H09147857A JP 7300137 A JP7300137 A JP 7300137A JP 30013795 A JP30013795 A JP 30013795A JP H09147857 A JPH09147857 A JP H09147857A
- Authority
- JP
- Japan
- Prior art keywords
- active material
- compound
- positive electrode
- storage battery
- 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.)
- Granted
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]
【産業上の利用分野】本発明は、水酸化ニッケル活物質
を主成分とするアルカリ蓄電池用正極活物質の製造方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a positive electrode active material for an alkaline storage battery containing a nickel hydroxide active material as a main component.
【０００２】[0002]
【従来の技術】近年、ワープロ、携帯電話、パソコン、
ビデオカメラなどに代表されるポータブル電子機器は、
益々小型化、軽量化される傾向がある。そして、これら
電子機器に使用される電池についても、その利便性を更
に向上させるために、一層高性能なものが要請されてい
る。2. Description of the Related Art In recent years, word processors, mobile phones, personal computers,
Portable electronic devices such as video cameras are
There is a tendency to be smaller and lighter. In addition, batteries with higher performance have been demanded for batteries used in these electronic devices in order to further improve their convenience.
【０００３】従来、アルカリ蓄電池に使用される正極と
しては、ニッケル粉末を主成分とするスラリーをパンチ
ングメタル等に塗着した後、焼結させて得た基板に、活
物質を含浸させて使用する所謂焼結式ニッケル正極が知
られている。しかし、この方式の電極は、基板を高多孔
度とした場合には強度が弱く、ニッケル粉末の脱落が生
じるために、実用上基板の多孔度を８０％とするのが限
界であり、また、パンチングメタル等の芯体を必要とす
ることから活物質の充填密度が小さく、高エネルギー密
度を図る上では不利であるという欠点を有している。Conventionally, as a positive electrode used in an alkaline storage battery, a substrate obtained by applying a slurry containing nickel powder as a main component to a punching metal or the like and then sintering the impregnated active material is used. A so-called sintered nickel positive electrode is known. However, this type of electrode has a low strength when the substrate is made highly porous, and the nickel powder falls off. Therefore, the limit of the porosity of the substrate to 80% is practically limited. Since a core body such as a punching metal is required, the packing density of the active material is small, which is disadvantageous in achieving a high energy density.
【０００４】更に、焼結基板の細孔は１０μm以下と小
さく、活物質の充填方法は、繁雑な工程を必要とする溶
液含浸法や電着含浸法に限定される欠点がある。Further, the pores of the sintered substrate are as small as 10 μm or less, and the method of filling the active material has a drawback that it is limited to the solution impregnation method and the electrodeposition impregnation method which require complicated steps.
【０００５】これらの欠点を改良する試みとして、例え
ば芯体を持たない多孔度約９５％の発泡ニッケル等の金
属多孔体に水酸化ニッケル活物質粉末を結着剤とともに
直接充填する非焼結式ニッケル正極が提案されている。As an attempt to improve these drawbacks, for example, a non-sintering type in which a nickel hydroxide active material powder is directly filled with a binder in a metallic porous body such as nickel foam having a porosity of about 95% and having no core body Nickel positive electrodes have been proposed.
【０００６】このような非焼結式ニッケル正極の膨潤を
抑制する手段として、特開平３−６２４５７号公報には
水酸化ニッケル活物質の表面に、水酸化ニッケルと水酸
化コバルトからなる固溶体層を被覆することが提案され
ている。As a means for suppressing the swelling of such a non-sintered nickel positive electrode, Japanese Patent Laid-Open No. 3-62457 discloses a solid solution layer composed of nickel hydroxide and cobalt hydroxide on the surface of a nickel hydroxide active material. It is proposed to coat.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、水酸化
ニッケルの表面に水酸化コバルトを主成分とする多成分
化合物を被覆した後、空気中で乾燥させると、水酸化ニ
ッケル粒子の表面に形成されたコバルト化合物が酸化劣
化を受けて活物質粒子間の導電性が低下するために、活
物質の利用率の低下を招くという問題がある。However, when the surface of nickel hydroxide was coated with a multi-component compound containing cobalt hydroxide as a main component and then dried in air, it was formed on the surface of nickel hydroxide particles. Since the cobalt compound undergoes oxidative deterioration to reduce the conductivity between the active material particles, there is a problem in that the utilization rate of the active material is reduced.
【０００８】本発明は、このような問題点に鑑みてなさ
れたものであり、活物質粒子間の導電性の低下を防止
し、活物質の利用率を向上させようとすることを本発明
の課題とする。The present invention has been made in view of such problems, and it is an object of the present invention to prevent a decrease in conductivity between active material particles and improve the utilization rate of the active material. It is an issue.
【０００９】[0009]
【課題を解決するための手段】本発明のアルカリ蓄電池
用正極活物質の製造方法は、水酸化ニッケルを主成分と
する活物質粒子表面を、ニッケル、亜鉛、カドミウム、
マグネシウム、アルミニウム、インジウムからなる群よ
り選択された少なくとも一種以上の化合物とコバルト化
合物とからなる多成分化合物で被覆する活物質被覆工程
と、上記多成分化合物で被覆した活物質粒子を窒素ある
いは不活性雰囲気下、または真空下で乾燥する乾燥工程
とを備えたことを特徴とする。A method for producing a positive electrode active material for an alkaline storage battery according to the present invention comprises a step of removing the surface of active material particles containing nickel hydroxide as a main component from nickel, zinc, cadmium,
Active material coating step of coating with a multi-component compound consisting of a cobalt compound and at least one compound selected from the group consisting of magnesium, aluminum and indium, and active material particles coated with the multi-component compound are nitrogen or inert. And a drying step of drying in an atmosphere or under vacuum.
【００１０】[0010]
【作用】水酸化ニッケル活物質にコバルト化合物を添加
すると、活物質相互間の導電性を向上させることができ
る。特に水酸化ニッケルを主成分とする粒子表面にコバ
ルト化合物を被覆することによって、コバルト化合物を
単に添加する場合に比べて、コバルト化合物の導電性向
上効果をより発揮させることができる。しかし、過放電
や充放電サイクルの進行に伴って、水酸化ニッケル粒子
表面に被覆されたコバルト化合物が水酸化ニッケルの内
部に拡散し、表面に被覆されているコバルト量が少なく
なる現象が生じ、コバルト化合物の導電性改善効果が低
下する。When the cobalt compound is added to the nickel hydroxide active material, the conductivity between the active materials can be improved. In particular, by coating the surface of the particles containing nickel hydroxide as the main component with the cobalt compound, the effect of improving the conductivity of the cobalt compound can be more exerted as compared with the case where the cobalt compound is simply added. However, with the progress of over-discharge and charge / discharge cycle, the cobalt compound coated on the surface of the nickel hydroxide particles diffuses inside the nickel hydroxide, and the phenomenon that the amount of cobalt coated on the surface becomes small occurs. The conductivity improving effect of the cobalt compound decreases.
【００１１】そこで、コバルト化合物と同時に、ニッケ
ル、亜鉛、カドミウム、マグネシウム、アルミニウム、
インジウムからなる群より選択された少なくと一種以上
の化合物を添加して多成分化合物とし、この多成分化合
物を水酸化ニッケル表面に被覆することによって、コバ
ルト化合物の水酸化ニッケル粒子内部への拡散を抑制す
ることができるので、コバルト化合物の導電性改善効果
が長期にわたって発揮される。Therefore, at the same time as the cobalt compound, nickel, zinc, cadmium, magnesium, aluminum,
At least one compound selected from the group consisting of indium is added to form a multi-component compound, and by coating this multi-component compound on the nickel hydroxide surface, the diffusion of the cobalt compound into the nickel hydroxide particles can be prevented. Since it can be suppressed, the effect of improving the conductivity of the cobalt compound is exhibited for a long period of time.
【００１２】しかし、前記のような多成分化合物を水酸
化ニッケル粒子表面に被覆した後、空気中などの酸素が
多く存在する雰囲気下で乾燥させると、水酸化ニッケル
粒子表面に被覆されているコバルト化合物が酸化劣化を
受け、四酸化三コバルト（Ｃｏ3Ｏ4）等の低導電性のコ
バルト化合物が形成され活物質粒子間の導電性が低下
し、前記のようなコバルト化合物の導電性改善効果を充
分に発揮することが困難となることを見いだした。However, when the surface of the nickel hydroxide particles is coated with the multi-component compound as described above and then dried in an atmosphere containing a large amount of oxygen such as in the air, the cobalt particles coated on the surface of the nickel hydroxide particles are coated. The compound undergoes oxidative deterioration to form a low-conductivity cobalt compound such as tricobalt tetroxide (Co 3 O 4 ) and the conductivity between the active material particles is reduced, thus improving the conductivity of the cobalt compound. It was found that it would be difficult to take full advantage of.
【００１３】そこで、窒素あるいは不活性気体雰囲気
下、または真空下で乾燥することによって四酸化三コバ
ルト（Ｃｏ3Ｏ4）等の低導電性のコバルト化合物の生成
を抑制することができ、コバルト化合物の導電性改善効
果を充分に発揮することができるため、活物質利用率が
向上する。Therefore, it is possible to suppress the production of a low-conductivity cobalt compound such as tricobalt tetroxide (Co 3 O 4 ) by drying in a nitrogen or inert gas atmosphere or under vacuum, and the cobalt compound Since the effect of improving conductivity can be sufficiently exhibited, the utilization factor of the active material is improved.
【００１４】[0014]
（実施例１） ［水酸化ニッケル活物質の作製］モル比でニッケル１に
対して、亜鉛０．００５、コバルト０．０２となるよう
に硫酸ニッケル、硫酸亜鉛、硫酸コバルトの混合水溶液
を撹拌しながら、アンモニア水及び水酸化ナトリウム水
溶液を徐々に添加し、反応時のｐＨが１０〜１２になる
ようにアンモニア水及び水酸化ナトリウム水溶液の添加
量を制御し、水酸化ニッケルを析出させた。次に、この
析出物を採取し、水洗、乾燥して水酸化ニッケルを主成
分とする活物質粒子を作製した。(Example 1) [Preparation of nickel hydroxide active material] A mixed aqueous solution of nickel sulfate, zinc sulfate, and cobalt sulfate was stirred so that the molar ratio was 0.005 zinc and 0.02 zinc with respect to 1 nickel. While the ammonia water and the sodium hydroxide aqueous solution were gradually added, nickel hydroxide was deposited by controlling the addition amounts of the ammonia water and the sodium hydroxide aqueous solution so that the pH during the reaction was 10 to 12. Next, the precipitate was collected, washed with water and dried to prepare active material particles containing nickel hydroxide as a main component.
【００１５】次に上記水酸化ニッケルを主成分とする活
物質粒子に約４倍（重量比）の水を加え混合分散し、こ
の分散液に対し、濃度が金属量換算で約１０重量％の硫
酸コバルト水溶液に対して硫酸亜鉛５重量％添加した多
成分溶液と水酸化ナトリウム水溶液とを添加し、上記活
物質粒子表面にコバルト化合物と亜鉛化合物とからなる
多成分化合物を被覆した。その後、上記多成分化合物で
被覆された活物質を水洗、窒素雰囲気中（酸素濃度０．
５体積％以下）８０℃で乾燥させたものを本発明活物質
ａと称する。Next, about 4 times (weight ratio) of water is added to the active material particles containing nickel hydroxide as a main component and mixed and dispersed. The concentration of the dispersion liquid is about 10% by weight in terms of metal amount. A multi-component solution prepared by adding 5% by weight of zinc sulfate to a cobalt sulfate aqueous solution and a sodium hydroxide aqueous solution were added to coat the surfaces of the active material particles with a multi-component compound including a cobalt compound and a zinc compound. Then, the active material coated with the above multi-component compound is washed with water and in a nitrogen atmosphere (oxygen concentration: 0.
5% by volume or less) A material dried at 80 ° C. is referred to as an active material a of the present invention.
【００１６】（実施例２）前記実施例１における活物質
の作製において、窒素雰囲気中に代えてヘリウム雰囲気
中（酸素濃度０．５体積％以下）で乾燥させた以外は実
施例１と同様にして本発明活物質ｂを作製した。Example 2 The same procedure as in Example 1 was repeated except that the active material in Example 1 was dried in a helium atmosphere (oxygen concentration of 0.5% by volume or less) instead of the nitrogen atmosphere. Inventive active material b was produced.
【００１７】（実施例３）前記実施例１における活物質
の作製において、窒素雰囲気中に代えて真空中で乾燥さ
せた以外は実施例１と同様にして本発明活物質ｃを作製
した。Example 3 An active material c of the present invention was produced in the same manner as in Example 1 except that the active material in Example 1 was dried in vacuum instead of in a nitrogen atmosphere.
【００１８】（比較例１）前記実施例１における活物質
の作製において、窒素雰囲気中に代えて空気中で乾燥さ
せた以外は実施例１と同様にして比較活物質ｘを作製し
た。Comparative Example 1 A comparative active material x was prepared in the same manner as in Example 1 except that the active material in Example 1 was dried in air instead of in a nitrogen atmosphere.
【００１９】［電池の作製］前記のように作製した各活
物質ａ、ｂ、ｃ、ｘと前記活物質に対して０．１重量％
のヒドロキシプロピルセルロースを溶解させた水溶液５
０重量％とを混合してスラリーとし、このスラリーを多
孔度９５％の発泡ニッケルに充填して、乾燥後所定厚み
に圧延して正極を作製した。[Production of Battery] 0.1 wt% of each active material a, b, c, x produced as described above and the active material.
Aqueous solution of hydroxypropyl cellulose
0% by weight was mixed to form a slurry, the foamed nickel having a porosity of 95% was filled, dried and rolled to a predetermined thickness to produce a positive electrode.
【００２０】このように作製した正極と、この正極に対
し充分な放電容量を有する公知の水素吸蔵電極とをセパ
レータを介して巻回して渦巻電極体を作製した。この渦
巻電極体を電池外装缶に挿入し、電解液を注液した後、
密閉させて公称容量１２００ｍＡｈのニッケル水素電池
をそれぞれ作製した。 ［電池の試験条件］前記のように作製したニッケル水素
電池を用いて、１２０ｍＡの電流値で２４時間充電し、
４００ｍＡの電流値で電池電圧が１．０Ｖに達するまで
放電して放電容量を測定した。そして、下記式に基づい
て利用率を求めてその結果を下記表１に示す。The positive electrode thus produced and a known hydrogen storage electrode having a sufficient discharge capacity for the positive electrode were wound around a separator to produce a spiral electrode body. After inserting this spiral electrode body into the battery outer can and injecting the electrolytic solution,
Sealing was performed to manufacture nickel hydrogen batteries having a nominal capacity of 1200 mAh. [Battery test conditions] Using the nickel-hydrogen battery produced as described above, the battery was charged at a current value of 120 mA for 24 hours,
The battery was discharged at a current value of 400 mA until the battery voltage reached 1.0 V, and the discharge capacity was measured. Then, the utilization rate was calculated based on the following formula, and the result is shown in Table 1 below.
【００２１】放電容量／公称容量 × １００ 但し、本発明活物質ａを１００とした時の指数で示す。Discharge capacity / nominal capacity × 100 However, it is shown by an index when the active material a of the present invention is 100.
【００２２】[0022]
【表１】 [Table 1]
【００２３】表１から明らかなように、本発明の活物質
ａ、ｂ及びｃは、空気中で乾燥させた比較活物質ｘより
も利用率が優れていることがわかる。As is clear from Table 1, the active materials a, b and c of the present invention have a higher utilization rate than the comparative active material x dried in air.
【００２４】これは、空気のように乾燥雰囲気中に過剰
の酸素が存在すると、性質上不安定な粒子表面の水酸化
コバルトが酸化劣化を受け、四酸化三コバルト（Ｃｏ3
Ｏ4）等の低導電性のコバルト化合物が形成され活物質
粒子間の導電性が低下するために、活物質の利用率の低
下を招いたためと考えられる。This is because when excess oxygen is present in a dry atmosphere like air, cobalt hydroxide on the surface of the particles, which is unstable in nature, undergoes oxidative deterioration, and tricobalt tetraoxide (Co 3
It is considered that a low conductivity cobalt compound such as O 4 ) is formed and conductivity between the active material particles is reduced, which leads to a decrease in utilization rate of the active material.
【００２５】（実施例４）この実施例４では、アルカリ
存在下での加熱処理について検討を行った。(Example 4) In Example 4, the heat treatment in the presence of alkali was examined.
【００２６】前記実施例１、２及び３の各活物質の作製
において、乾燥する前にアルカリを添加した後、空気中
で加熱処理を施す以外は前記実施例１、２及び３と同様
にして本発明活物質をＡ、Ｂ及びＣをそれぞれ作製し
た。In the preparation of the active materials of Examples 1, 2 and 3, the same procedure as in Examples 1, 2 and 3 was carried out except that an alkali was added before drying and a heat treatment was performed in air. The active material of the present invention was prepared as A, B and C, respectively.
【００２７】そして、前記［電池の作製］及び［電池の
試験条件］に準じて、利用率を求めてその結果を下記表
２に示す。Then, according to the above [Production of Battery] and [Test Conditions of Battery], the utilization rate was obtained and the results are shown in Table 2 below.
【００２８】但し、前記本発明活物質ａを１００とした
時の指数で示す。However, it is shown by an index when the active material a of the present invention is 100.
【００２９】[0029]
【表２】 [Table 2]
【００３０】表２から明らかなように、乾燥工程の前に
アルカリ共存下で加熱処理すると飛躍的に利用率が向上
することがわかる。これは、アルカリ熱処理によって表
面に被覆されたコバルト化合物が導電性の高いオキシ水
酸化コバルトに変化したために、活物質粒子間の導電性
が向上し、利用率が向上したためと考えられる。As is clear from Table 2, the utilization factor is dramatically improved by heat treatment in the presence of alkali before the drying step. It is considered that this is because the cobalt compound coated on the surface by the alkali heat treatment was changed to highly conductive cobalt oxyhydroxide, so that the conductivity between the active material particles was improved and the utilization rate was improved.
【００３１】（実施例５）この実施例５では、乾燥温度
について検討を行った。(Example 5) In Example 5, the drying temperature was examined.
【００３２】前記実施例１の活物質の作製において、乾
燥温度をそれぞれ５０、１２０、１５０、１８０、２０
０℃に変化させた以外は前記実施例１と同様にして活物
質をそれぞれ作製した。In the preparation of the active material of Example 1, the drying temperatures were 50, 120, 150, 180 and 20, respectively.
Active materials were prepared in the same manner as in Example 1 except that the temperature was changed to 0 ° C.
【００３３】そして、前記［電池の作製］及び［電池の
試験条件］に準じて、利用率を求めてその結果を下記表
３に示す。Then, according to the above [Production of battery] and [Test conditions of battery], the utilization rate was obtained and the results are shown in Table 3 below.
【００３４】但し、前記本発明活物質ａを１００とした
時の指数で示す。However, it is shown by an index when the active material a of the present invention is 100.
【００３５】[0035]
【表３】 [Table 3]
【００３６】表３から明らかなように、乾燥温度が１８
０℃を越えると活物質利用率の低下が見られるため、乾
燥温度を１８０℃以下にすることが好ましい。これは、
乾燥温度を過剰に高くすると、水酸化ニッケル粒子表面
の水酸化コバルトが酸化劣化を受け、四酸化三コバルト
（Ｃｏ3Ｏ4）等の低導電性のコバルト化合物が形成され
活物質粒子間の導電性が低下するために、活物質の利用
率の低下を招いたためと考えられる。As is apparent from Table 3, the drying temperature is 18
When the temperature exceeds 0 ° C, the utilization factor of the active material decreases, so that the drying temperature is preferably 180 ° C or lower. this is,
If the drying temperature is excessively increased, the cobalt hydroxide on the surface of the nickel hydroxide particles is oxidatively deteriorated, and a low-conductivity cobalt compound such as tricobalt tetraoxide (Co 3 O 4 ) is formed, so that the conductivity between the active material particles is increased. It is considered that this is because the utilization rate of the active material was lowered due to the decrease in the property.
【００３７】尚、本実施例では、被覆層の成分をコバル
ト化合物と亜鉛化合物との２成分化合物を用いたが、こ
れに限らずコバルト化合物と、ニッケル化合物、カドミ
ウム化合物、マグネシウム化合物、アルミニウム化合物
またはインジウム化合物との２成分化合物を用いても同
様の効果が得られる。また、コバルト化合物とこれらの
化合物の２種以上との多成分化合物で被覆層を構成して
も同様の効果が得られる。In this embodiment, the component of the coating layer is a two-component compound of a cobalt compound and a zinc compound, but not limited to this, a cobalt compound, a nickel compound, a cadmium compound, a magnesium compound, an aluminum compound or The same effect can be obtained by using a binary compound with an indium compound. Also, the same effect can be obtained by forming the coating layer with a multi-component compound of a cobalt compound and two or more of these compounds.
【００３８】また、本実施例では、不活性気体としてヘ
リウムを用いたが、これに限らずネオン、アルゴンまた
はキセノンを用いても同様の効果が得られる。また、こ
れらの混合気体を用いても同様の効果が得られる。In this embodiment, helium is used as the inert gas, but the present invention is not limited to this, and the same effect can be obtained by using neon, argon or xenon. The same effect can be obtained by using these mixed gases.
【００３９】[0039]
【発明の効果】以上の如く本発明の製造方法によれば、
表面に被覆されたコバルト化合物の酸化劣化を効果的に
防止することができ、コバルト化合物の導電性改善効果
が長期にわたって充分に発揮することができるため、活
物質利用率が高く、高容量の電池が得られる。As described above, according to the manufacturing method of the present invention,
Since the cobalt compound coated on the surface can be effectively prevented from oxidative deterioration and the conductivity improving effect of the cobalt compound can be sufficiently exerted for a long period of time, a high active material utilization rate and a high capacity battery Is obtained.
フロントページの続き (72)発明者 馬場 良貴 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内Front page continued (72) Inventor Yoshitaka Baba 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.
Claims (4)
子表面を、ニッケル、亜鉛、カドミウム、マグネシウ
ム、アルミニウム、インジウムからなる群より選択され
た少なくとも一種以上の化合物とコバルト化合物とから
なる多成分化合物で被覆する活物質被覆工程と、上記多
成分化合物で被覆した活物質粒子を窒素あるいは不活性
気体雰囲気下、または真空下で乾燥する乾燥工程とを備
えたことを特徴とするアルカリ蓄電池用正極活物質の製
造方法。1. A multi-component comprising a cobalt compound and at least one compound selected from the group consisting of nickel, zinc, cadmium, magnesium, aluminum and indium on the surface of active material particles containing nickel hydroxide as a main component. A positive electrode for an alkaline storage battery, comprising: an active material coating step of coating with a compound; and a drying step of drying the active material particles coated with the multi-component compound under a nitrogen or inert gas atmosphere or under vacuum. Method of manufacturing active material.
熱処理を施したことを特徴とする請求項１記載のアルカ
リ蓄電池用正極活物質の製造方法。2. The method for producing a positive electrode active material for an alkaline storage battery according to claim 1, wherein after the coating step, heat treatment is performed in the presence of an alkali.
ルゴン及びキセノンから選択された少なくとも１種以上
であることを特徴とする請求項１記載のアルカリ蓄電池
用正極活物質の製造方法。3. The method for producing a positive electrode active material for an alkaline storage battery according to claim 1, wherein the inert gas is at least one selected from helium, neon, argon and xenon.
で行うことを特徴とする請求項１記載のアルカリ蓄電池
用正極活物質の製造方法。4. The method for producing a positive electrode active material for an alkaline storage battery according to claim 1, wherein the drying temperature in the drying step is 180 ° C. or lower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30013795A JP3515251B2 (en) | 1995-11-17 | 1995-11-17 | Method for producing positive electrode active material for alkaline storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30013795A JP3515251B2 (en) | 1995-11-17 | 1995-11-17 | Method for producing positive electrode active material for alkaline storage battery |
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| Publication Number | Publication Date |
|---|---|
| JPH09147857A true JPH09147857A (en) | 1997-06-06 |
| JP3515251B2 JP3515251B2 (en) | 2004-04-05 |
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ID=17881189
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30013795A Expired - Fee Related JP3515251B2 (en) | 1995-11-17 | 1995-11-17 | Method for producing positive electrode active material for alkaline storage battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001297758A (en) * | 2000-04-12 | 2001-10-26 | Matsushita Electric Ind Co Ltd | Positive electrode active material for alkaline storage cell and manufacturing method and alkaline storage cell using above |
| WO2014080720A1 (en) * | 2012-11-20 | 2014-05-30 | 住友金属鉱山株式会社 | Coated nickel hydroxide powder for alkali secondary battery positive electrode active material and method of producing same |
| US20150311511A1 (en) * | 2012-11-20 | 2015-10-29 | Sumitomo Metal Mining Co., Ltd. | Coated nickel hydroxide powder for alkali secondary battery positive electrode active material and method of producing same |
-
1995
- 1995-11-17 JP JP30013795A patent/JP3515251B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001297758A (en) * | 2000-04-12 | 2001-10-26 | Matsushita Electric Ind Co Ltd | Positive electrode active material for alkaline storage cell and manufacturing method and alkaline storage cell using above |
| WO2014080720A1 (en) * | 2012-11-20 | 2014-05-30 | 住友金属鉱山株式会社 | Coated nickel hydroxide powder for alkali secondary battery positive electrode active material and method of producing same |
| JP2014103004A (en) * | 2012-11-20 | 2014-06-05 | Sumitomo Metal Mining Co Ltd | Coated nickel hydroxide powder for alkaline secondary battery positive electrode active material and method for producing the same |
| CN104813523A (en) * | 2012-11-20 | 2015-07-29 | 住友金属矿山株式会社 | Coated nickel hydroxide powder for alkali secondary battery positive electrode active material and method of producing same |
| US20150311511A1 (en) * | 2012-11-20 | 2015-10-29 | Sumitomo Metal Mining Co., Ltd. | Coated nickel hydroxide powder for alkali secondary battery positive electrode active material and method of producing same |
| US20150311523A1 (en) * | 2012-11-20 | 2015-10-29 | Sumitomo Metal Mining Co., Ltd. | Coated nickel hydroxide powder for alkali secondary battery positive electrode active material and method of producing same |
| US10680239B2 (en) * | 2012-11-20 | 2020-06-09 | Sumitomo Metal Mining Co., Ltd. | Coated nickel hydroxide powder for alkali secondary battery positive electrode active material and method of producing same |
| US10797316B2 (en) | 2012-11-20 | 2020-10-06 | Sumitomo Metal Mining Co., Ltd. | Coated nickel hydroxide powder for alkali secondary battery positive electrode active material and method of producing same |
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| Publication number | Publication date |
|---|---|
| JP3515251B2 (en) | 2004-04-05 |
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