JP2004179044A - Anode activator for alkaline primary cell and alkaline primary cell using it - Google Patents

Anode activator for alkaline primary cell and alkaline primary cell using it Download PDF

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Publication number
JP2004179044A
JP2004179044A JP2002345379A JP2002345379A JP2004179044A JP 2004179044 A JP2004179044 A JP 2004179044A JP 2002345379 A JP2002345379 A JP 2002345379A JP 2002345379 A JP2002345379 A JP 2002345379A JP 2004179044 A JP2004179044 A JP 2004179044A
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Prior art keywords
zinc powder
alkaline primary
particle size
active material
primary cell
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JP2002345379A
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Japanese (ja)
Inventor
Jun Sato
佐藤　　淳
Hiromi Tamakoshi
博美 玉腰
Hisanori Sugawara
久典 菅原
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Maxell Holdings Ltd
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Hitachi Maxell Ltd
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  • Battery Electrode And Active Subsutance (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anode activator for an alkaline primary cell made of zinc powder which has fine liquidity when turned into a paste, capable of securing excellent productivity by restraining troubles such as injection failure, contributing to the improvement of large-current discharge characteristics of a cell with a large reaction area, and an alkaline primary cell using the same. <P>SOLUTION: A specific surface area of zinc powder measured by a specific surface area measuring method such as BET method is 0.06 m<SP>2</SP>/g or more. If the value falls below 0.06m<SP>2</SP>/g, a reaction area of the active material is too small to improve the large-current discharge characteristics of the cell. If an average particle size of the zinc powder falls below 80 μm, liquidity when turned into the paste is degraded, it tends to generate troubles such as injection failure, and makes it hard to secure the productivity. If it exceeds 140 μm, the dispersibility of zinc particles is degraded which tends to give rise to solid-liquid separation. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、亜鉛粉末からなるアルカリ一次電池用負極活物質およびそれを用いたアルカリ一次電池に関する。
【０００２】
【従来の技術】
水素吸蔵合金を負極活物質とするアルカリ二次電池の従来例に、特許文献１や特許文献２がある。特許文献１では、平均粒径が３２μｍ、粒度分布幅が２〜１５０μｍの多孔質粉を負極活物質としてペースト式電極を作製している。特許文献２では、平均粒径が７μｍ、粒度分布幅が１〜３０μｍの微粉末を負極活物質として、円柱状の電極を形成している。これら特許文献１および２のごとく、粒径の小さな微粉末を用いると、活物質の反応面積が増大するため、電池の大電流放電特性の向上を図ることができる。
【０００３】
【特許文献１】
特開２０００−２１３９６号公報（段落番号００１９）
【特許文献２】
特開２０００−１７３０２号公報（段落番号００１６）
【０００４】
【発明が解決しようとする課題】
本発明者等は、亜鉛粉末からなるアルカリ一次電池用の負極活物質の開発にたずさわっている。そこで特許文献１や特許文献２のごとく、粒径の小さな、いわゆる微粒亜鉛を活物質とする電池の作製を試みた。しかし、この種の微粒亜鉛を用いた亜鉛ペーストは流動性に乏しく、生産ラインにおけるペースト注入工程において注入不良などのトラブルを引き起こしやすく、良好な生産性を確保できないことがわかった。
【０００５】
本発明は、以上のような問題点を解決するためになされたものであり、ペースト化した際に良好な流動性を発揮し、以て注入不良などのトラブルを抑えて良好な生産性を確保できるとともに、反応面積が大きく、電池の大電流放電特性の向上に寄与し得る亜鉛粉末からなるアルカリ一次電池用の負極活物質、およびこれを用いたアルカリ一次電池を得るにある。
【０００６】
【課題を解決するための手段】
本発明は、亜鉛粉末からなるアルカリ一次電池用の負極活物質を対象とする。そして、当該亜鉛粉末が、比表面積０．０６ｍ２ ／ｇ以上、平均粒径８０μｍ以上１４０μｍ以下の範囲にあることを特徴とする。比表面積は、ＢＥＴ法等により得られた値である。平均粒径は、マイクロトラックにより得られた値である。
【０００７】
かかる亜鉛粉末は、平均粒径５μｍ〜３０μｍの極めて微細な亜鉛粉末を金型に入れてプレス成形した後、真空中で燒結して多孔性亜鉛燒結体を作製し、これをボールミル粉砕、分級して得ることができる。
【０００８】
すなわち、従来に係る亜鉛粉末が球状、或いは楕円状の表面が円滑な粒子であるのに対し、本発明に係る亜鉛粉末は、微細な亜鉛粉末を燒結したものであるため多孔性となり、比表面積は従来の亜鉛粉末よりも大きなものとなる。このように比表面積が増大すると、反応表面積を大きくできるので、電極反応の分極が低減でき、その結果、電池を放電したときに、特に大電流放電時の負極亜鉛の利用率が向上し、より大きな放電容量を引き出すことができる。
【０００９】
また、亜鉛粉末の平均粒径を８０〜１４０μｍの範囲とすることにより、ペースト化した際の流動性の低下を抑えて、生産性を確保できる。すなわち、亜鉛粉末とゲル化剤とアルカリ電解液とを混合してなる負極ペーストは、従来の亜鉛粉末を混合してなるペーストと同様の流動性を発揮し、従って電池作製の際に注入不良などのトラブルがなく、良好な生産性を確保できる。
【００１０】
前記亜鉛粉末は、アルミニウム、ビスマス、インジウム、マグネシウム、カルシウムのうち１種類以上の元素を含む合金とすることが望ましく、これにより、亜鉛の腐食反応の進行を抑制して、水素ガスの発生を少なくすることができる。
【００１１】
また、本発明は、請求項１又は２記載の活物質を用いたアルカリ一次電池を対象とする。
【００１２】
【発明の作用効果】
本発明に係る亜鉛粉末の比表面積は、ＢＥＴ法などの比表面積測定法を用いて測定した値が、０．０６ｍ２ ／ｇ以上、好ましくは、０．０７ｍ２ ／ｇ以上とする。０．０６ｍ２ ／ｇを下回ると、活物質の反応面積が小さく、電池の大電流放電特性の向上を図ることができない。亜鉛粉末の平均粒径が８０μｍを下回ると、ペースト化した際の流動性が低下して、注入不良などのトラブルを起こしやすく、生産性を確保できない。１４０μｍを上回ると、亜鉛粒子の分散性が低下して、固液分離が起こり易くなる。以上より、亜鉛粉末の比表面積および平均粒径を上記数値範囲とすることにより、大電流放電特性の向上と生産性の確保の両立が可能となる。
【００１３】
【実施例】
〈実施例１〉
図１に本発明の実施例に係るアルカリ一次電池の構造を示す。このアルカリ一次電池は単三形の乾電池であって、正極端子を兼ねる有底円筒状の正極缶１内に収納された円筒状の正極２と、正極２の筒孔の内周面に接するように配置されたセパレータ３と、該セパレータ３を介して正極２の筒孔内に充填されたゲル状の負極４と、セパレータ３に含浸された電解液（図示せず）とを備える。正極缶２の外表面は、樹脂外装体５で覆ってある。電池の封口部分６には、内圧の異常上昇防止用、つまり防爆用の安全機構を有する樹脂製封口体７と、これを内側から支える金属ワッシャー８および樹脂ワッシャー９と、図中の下方に向けて凸状（ハット状）に形成された負極端子板１０とが装着されている。正極缶１の下面は、絶縁キャップ１１で覆われている。符号１２は、電池の中心部に配置された釘状の負極集電棒を示す。
【００１４】
詳しくは、二酸化マンガン１００重量部に黒鉛１０重量部、ポリテトラフルオロエチレン０．５重量部を加えた後、攪拌機で乾式混合し、さらに円筒形に加圧成形して正極２とした。セパレータ３としては、ビニロンとレーヨンを主体とする不織布からなる公知のアルカリ乾電池用セパレータを用いた。アルカリ電解液としては、４０％水酸化カリウム水溶液を用いた。以上の構成は、公知のアルカリ乾電池の構成である。
【００１５】
そのうえで、負極４は以下のようにして得た。すなわち、平均粒径５μｍ、粒度分布幅０．５〜２０μｍの亜鉛の微粒粉末を金型に入れ、圧力４０ｋｇ／ｃｍ２ で円柱状（直径１５ｍｍ、長さ５０ｍｍ）に成形した。得られた成形体を真空燒結炉にセットし、１０〜４ｔоｒｒの真空下で燒結温度４０５℃で２時間の燒結を行った。得られた燒結体のかさ密度は４．４ｇ／ｃｍ３ 、空隙率は３８％であった。燒結体の断面写真は、図２（ａ）・（ｂ）に示すごとくであり、表面に凹凸形状を有する多孔質体となっていた。この多孔性亜鉛燒結体をボールミル粉砕、分級により平均粒径１１０μｍ、粒度分布幅７５〜４５０μｍ、ＢＥＴ比表面積１．２ｍ２ ／ｇの多孔性の亜鉛粉末を得た。この亜鉛粉末とアルカリ電解液とゲル化剤とを混合して、ゲル状の負極４を得た。
【００１６】
〈実施例２〉
平均粒径１０μｍ、粒度分布幅１〜５０μｍの亜鉛の微粒粉末を用いたこと以外は、実施例１と同様の方法で負極活物質である多孔性の亜鉛粉末を得た。この多孔性亜鉛粉末の平均粒径は１０５μｍ、粒度分布幅７５〜４５０μｍ、ＢＥＴ比表面積は０．８１ｍ２ ／ｇであった。この亜鉛粉末を用いて、実施例１と同様の構成のアルカリ一次電池を作製した。
【００１７】
〈実施例３〉
平均粒径３２μｍ、粒度分布幅１０〜１００μｍの亜鉛の微粒粉末を用いたこと以外は実施例１と同様の方法で、負極活物質である多孔性の亜鉛粉末を得た。亜鉛粉末の平均粒径は１２０μｍ、粒度分布幅７５〜４５０μｍ、ＢＥＴ比表面積は０．２２ｍ２ ／ｇであった。この亜鉛粉末を用いて、実施例１と同様の構成のアルカリ一次電池を作製した。
【００１８】
〈実施例４〉
平均粒径５０μｍ、粒度分布幅２０〜１５０μｍの亜鉛の微粒粉末を用いたこと以外は実施例１と同様の方法で、負極活物質である多孔性亜鉛粉末を得た。亜鉛粉末の平均粒径は１１０μｍ、粒度分布幅７５〜４５０μｍ、ＢＥＴ比表面積は０．０７５ｍ２ ／ｇであった。この亜鉛粉末を用いて、実施例１と同様の構成のアルカリ一次電池を作製した。
【００１９】
〈比較例１〉
負極活物質として、平均粒径１２０μｍ、粒度分布幅７５〜４５０μｍ、ＢＥＴ比表面積０．０５ｍ２ ／ｇの亜鉛粉末を用いて、実施例１と同様の構成のアルカリ一次電池を作製した。
【００２０】
〈比較例２〉
負極活物質として、平均粒径８２μｍ、粒度分布幅７５〜４５０μｍ、ＢＥＴ比表面積０．０６ｍ２ ／ｇの亜鉛粉末を用いて、実施例１と同様の構成のアルカリ一次電池を作製した。
【００２１】
〈比較例３〉
負極活物質として、平均粒径１５０μｍ、粒度分布幅７５〜４５０μｍ、ＢＥＴ比表面積０．０７ｍ２ ／ｇの亜鉛粉末を用いて、実施例１と同様の構成のアルカリ一次電池を作製した。
【００２２】
上記実施例１〜４および比較例１〜３にかかるアルカリ一次電池を、室温において、放電容量１Ａで連続放電し、放電電圧が０．９Ｖに低下するまで放電させた。その後、電池の放電を終了し、放電時間を記録した。
【００２３】
また、上記実施例１〜４および比較例１〜３にかかるアルカリ一次電池における生産性を評価した。評価基準は、以下のごとくとした。
○：直立された内径１０ｍｍのノズルの先端部から亜鉛ペーストを落下させたときに、４０ｇ／１０秒間以上落下し、かつ固液分離が起こらない。
×：上記条件で１０秒間に落下するペーストの量が４０ｇより少ないか、又は固液分離が目視で観測される。
これら放電時間の測定結果、および生産性にかかる評価結果を表１に示す。
【００２４】
【表１】

Figure 2004179044
【００２５】
表１より、亜鉛粉末の比表面積は、ＢＥＴ法などの比表面積測定法を用いて測定した値が、０．０６ｍ２ ／ｇ以上であることが必要であることがわかる。０．０６ｍ２ ／ｇを下回ると、活物質の反応面積が小さく、電池の大電流放電特性の向上を図ることができない。また、亜鉛粉末の平均粒径が８０μｍを下回ると、亜鉛ペーストの流動性が低下して、注入不良などのトラブルを起こしやすく、良好な生産性を確保できない。１４０μｍを上回ると、亜鉛粒子の分散性が低下して、固液分離が起こり易くなる。
【図面の簡単な説明】
【図１】本発明に係るアルカリ一次電池の構成を示す縦断側面図である。
【図２】燒結後の燒結体の断面写真である。
【符号の説明】
２ 正極
３ セパレータ
４ ゲル状の負極[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a negative electrode active material for an alkaline primary battery comprising zinc powder and an alkaline primary battery using the same.
[0002]
[Prior art]
Patent Literature 1 and Patent Literature 2 are conventional examples of alkaline secondary batteries using a hydrogen storage alloy as a negative electrode active material. In Patent Document 1, a paste-type electrode is manufactured using a porous powder having an average particle size of 32 μm and a particle size distribution width of 2 to 150 μm as a negative electrode active material. In Patent Document 2, a columnar electrode is formed using fine powder having an average particle size of 7 μm and a particle size distribution width of 1 to 30 μm as a negative electrode active material. As described in Patent Documents 1 and 2, when a fine powder having a small particle size is used, the reaction area of the active material increases, so that the high-current discharge characteristics of the battery can be improved.
[0003]
[Patent Document 1]
JP 2000-21396 A (paragraph number 0019)
[Patent Document 2]
JP-A-2000-17302 (paragraph number 0016)
[0004]
[Problems to be solved by the invention]
The present inventors are engaged in the development of a negative electrode active material for an alkaline primary battery, which is made of zinc powder. Thus, as in Patent Document 1 and Patent Document 2, an attempt was made to manufacture a battery using so-called fine zinc as an active material having a small particle size. However, it has been found that zinc paste using fine zinc powder of this kind has poor fluidity, easily causes troubles such as poor injection in a paste injection step in a production line, and cannot ensure good productivity.
[0005]
The present invention has been made to solve the above-described problems, and exhibits good fluidity when pasted, thereby suppressing problems such as poor injection and securing good productivity. An object of the present invention is to provide a negative electrode active material for an alkaline primary battery, which is made of zinc powder and has a large reaction area and can contribute to improvement of a large current discharge characteristic of the battery, and an alkaline primary battery using the same.
[0006]
[Means for Solving the Problems]
The present invention is directed to a negative electrode active material composed of zinc powder for an alkaline primary battery. The zinc powder has a specific surface area of 0.06 m 2 / g or more and an average particle size of 80 μm or more and 140 μm or less. The specific surface area is a value obtained by a BET method or the like. The average particle size is a value obtained by Microtrack.
[0007]
Such zinc powder is prepared by pressing an extremely fine zinc powder having an average particle size of 5 μm to 30 μm into a mold, press-sintering the same, and producing a sintered porous zinc body in a vacuum. Can be obtained.
[0008]
That is, while the conventional zinc powder has a spherical or elliptical surface with smooth particles, the zinc powder according to the present invention is porous because of sintering fine zinc powder, and has a specific surface area. Is larger than conventional zinc powder. When the specific surface area is increased in this way, the reaction surface area can be increased, so that the polarization of the electrode reaction can be reduced. As a result, when the battery is discharged, the utilization rate of the negative electrode zinc particularly at the time of discharging a large current is improved. A large discharge capacity can be obtained.
[0009]
Further, by setting the average particle size of the zinc powder in the range of 80 to 140 μm, it is possible to suppress a decrease in fluidity when the paste is formed and to secure productivity. That is, the negative electrode paste obtained by mixing the zinc powder, the gelling agent, and the alkaline electrolyte exhibits the same fluidity as the paste obtained by mixing the conventional zinc powder, so that, for example, poor injection during battery fabrication. No problems and good productivity can be ensured.
[0010]
The zinc powder is preferably an alloy containing one or more elements of aluminum, bismuth, indium, magnesium and calcium, thereby suppressing the progress of the zinc corrosion reaction and reducing the generation of hydrogen gas. can do.
[0011]
Further, the present invention is directed to an alkaline primary battery using the active material according to claim 1 or 2.
[0012]
Effects of the Invention
The specific surface area of the zinc powder according to the present invention is a value measured using a specific surface area measuring method such as the BET method, 0.06 m 2 / g or more, preferably, to 0.07 m 2 / g or more. If it is less than 0.06 m 2 / g, the reaction area of the active material is small, and it is not possible to improve the high current discharge characteristics of the battery. If the average particle size of the zinc powder is less than 80 μm, the fluidity at the time of forming a paste is reduced, and troubles such as poor injection are likely to occur, and productivity cannot be secured. If it exceeds 140 μm, the dispersibility of the zinc particles decreases, and solid-liquid separation easily occurs. As described above, by setting the specific surface area and the average particle diameter of the zinc powder within the above numerical ranges, it is possible to simultaneously improve the large-current discharge characteristics and ensure the productivity.
[0013]
【Example】
<Example 1>
FIG. 1 shows a structure of an alkaline primary battery according to an embodiment of the present invention. This alkaline primary battery is an AA dry battery, and is in contact with a cylindrical positive electrode 2 housed in a bottomed cylindrical positive electrode can 1 also serving as a positive electrode terminal, and an inner peripheral surface of a cylindrical hole of the positive electrode 2. , A gelled negative electrode 4 filled in the cylindrical hole of the positive electrode 2 through the separator 3, and an electrolytic solution (not shown) impregnated in the separator 3. The outer surface of the positive electrode can 2 is covered with a resin exterior body 5. The sealing portion 6 of the battery has a resin sealing member 7 having a safety mechanism for preventing an internal pressure from abnormally rising, that is, an explosion proof, a metal washer 8 and a resin washer 9 for supporting the sealing member from the inside, and facing downward in the figure. And a negative electrode terminal plate 10 formed in a convex shape (hat shape). The lower surface of the positive electrode can 1 is covered with an insulating cap 11. Numeral 12 indicates a nail-shaped negative electrode current collecting rod arranged at the center of the battery.
[0014]
Specifically, 10 parts by weight of graphite and 0.5 parts by weight of polytetrafluoroethylene were added to 100 parts by weight of manganese dioxide, followed by dry mixing with a stirrer, and further pressure-molded into a cylindrical shape to obtain a positive electrode 2. As the separator 3, a known alkaline dry battery separator made of a nonwoven fabric mainly composed of vinylon and rayon was used. As the alkaline electrolyte, a 40% aqueous potassium hydroxide solution was used. The above configuration is a configuration of a known alkaline dry battery.
[0015]
Then, the negative electrode 4 was obtained as follows. That is, zinc fine powder having an average particle size of 5 μm and a particle size distribution width of 0.5 to 20 μm was placed in a mold and molded into a columnar shape (diameter 15 mm, length 50 mm) at a pressure of 40 kg / cm 2 . The obtained molded body was set in a vacuum sintering furnace and sintered at a sintering temperature of 405 ° C. for 2 hours under a vacuum of 10 to 4 torr. The bulk density of the obtained sintered body was 4.4 g / cm 3 , and the porosity was 38%. Cross-sectional photographs of the sintered body are as shown in FIGS. 2 (a) and 2 (b), and the sintered body was a porous body having an uneven shape on the surface. This porous zinc sintered body was subjected to ball mill pulverization and classification to obtain a porous zinc powder having an average particle size of 110 μm, a particle size distribution of 75 to 450 μm, and a BET specific surface area of 1.2 m 2 / g. The zinc powder, the alkaline electrolyte and the gelling agent were mixed to obtain a gelled negative electrode 4.
[0016]
<Example 2>
A porous zinc powder as a negative electrode active material was obtained in the same manner as in Example 1, except that a fine zinc powder having an average particle diameter of 10 µm and a particle size distribution width of 1 to 50 µm was used. The average particle size of the porous zinc powder was 105 μm, the particle size distribution was 75 to 450 μm, and the BET specific surface area was 0.81 m 2 / g. Using this zinc powder, an alkaline primary battery having the same configuration as in Example 1 was produced.
[0017]
<Example 3>
A porous zinc powder as a negative electrode active material was obtained in the same manner as in Example 1 except that zinc fine powder having an average particle size of 32 μm and a particle size distribution width of 10 to 100 μm was used. The average particle size of the zinc powder was 120 μm, the particle size distribution width was 75 to 450 μm, and the BET specific surface area was 0.22 m 2 / g. Using this zinc powder, an alkaline primary battery having the same configuration as in Example 1 was produced.
[0018]
<Example 4>
A porous zinc powder as a negative electrode active material was obtained in the same manner as in Example 1, except that a fine zinc powder having an average particle diameter of 50 μm and a particle size distribution width of 20 to 150 μm was used. The average particle size of the zinc powder was 110 μm, the particle size distribution was 75 to 450 μm, and the BET specific surface area was 0.075 m 2 / g. Using this zinc powder, an alkaline primary battery having the same configuration as in Example 1 was produced.
[0019]
<Comparative Example 1>
Using a zinc powder having an average particle size of 120 μm, a particle size distribution width of 75 to 450 μm, and a BET specific surface area of 0.05 m 2 / g as the negative electrode active material, an alkaline primary battery having the same configuration as in Example 1 was produced.
[0020]
<Comparative Example 2>
Using a zinc powder having an average particle diameter of 82 μm, a particle size distribution width of 75 to 450 μm, and a BET specific surface area of 0.06 m 2 / g as the negative electrode active material, an alkaline primary battery having the same configuration as in Example 1 was produced.
[0021]
<Comparative Example 3>
Using a zinc powder having an average particle diameter of 150 μm, a particle size distribution width of 75 to 450 μm, and a BET specific surface area of 0.07 m 2 / g as the negative electrode active material, an alkaline primary battery having the same configuration as in Example 1 was produced.
[0022]
The alkaline primary batteries according to Examples 1 to 4 and Comparative Examples 1 to 3 were continuously discharged at room temperature with a discharge capacity of 1 A, and discharged until the discharge voltage dropped to 0.9 V. Thereafter, the discharge of the battery was terminated, and the discharge time was recorded.
[0023]
Further, the productivity of the alkaline primary batteries according to Examples 1 to 4 and Comparative Examples 1 to 3 was evaluated. The evaluation criteria were as follows.
：: When the zinc paste was dropped from the tip of an upright nozzle having an inner diameter of 10 mm, the zinc paste dropped for 40 g / 10 seconds or more, and solid-liquid separation did not occur.
×: Under the above conditions, the amount of the paste falling in 10 seconds is less than 40 g, or solid-liquid separation is visually observed.
Table 1 shows the measurement results of these discharge times and the evaluation results related to productivity.
[0024]
[Table 1]
Figure 2004179044
[0025]
Table 1 shows that the specific surface area of the zinc powder needs to be 0.06 m 2 / g or more as measured by a specific surface area measurement method such as the BET method. If it is less than 0.06 m 2 / g, the reaction area of the active material is small, and it is not possible to improve the high current discharge characteristics of the battery. On the other hand, when the average particle size of the zinc powder is less than 80 μm, the fluidity of the zinc paste is reduced, so that troubles such as poor injection are likely to occur, and good productivity cannot be secured. If it exceeds 140 μm, the dispersibility of zinc particles decreases, and solid-liquid separation easily occurs.
[Brief description of the drawings]
FIG. 1 is a vertical sectional side view showing a configuration of an alkaline primary battery according to the present invention.
FIG. 2 is a cross-sectional photograph of a sintered body after sintering.
[Explanation of symbols]
2 Positive electrode 3 Separator 4 Gelled negative electrode

Claims (3)

亜鉛粉末からなるアルカリ一次電池用の負極活物質であって、
前記亜鉛粉末は、比表面積が０．０６ｍ２ ／ｇ以上、平均粒径が８０〜１４０μｍの範囲にあることを特徴とするアルカリ一次電池用負極活物質。A negative electrode active material for an alkaline primary battery composed of zinc powder,
The negative electrode active material for an alkaline primary battery, wherein the zinc powder has a specific surface area of 0.06 m 2 / g or more and an average particle diameter in a range of 80 to 140 μm. 前記亜鉛粉末が、アルミニウム、ビスマス、インジウム、マグネシウム、カルシウムのうち１種類以上の元素を含む合金である請求項１記載のアルカリ一次電池用負極活物質。2. The negative electrode active material for an alkaline primary battery according to claim 1, wherein the zinc powder is an alloy containing at least one element among aluminum, bismuth, indium, magnesium, and calcium. 3. 請求項１又は２記載の活物質を用いたことを特徴とするアルカリ一次電池。An alkaline primary battery using the active material according to claim 1.
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* Cited by examiner, † Cited by third party
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WO2010029678A1 (en) * 2008-09-12 2010-03-18 パナソニック株式会社 Mercury-free alkaline dry battery
WO2010029679A1 (en) * 2008-09-12 2010-03-18 パナソニック株式会社 Mercury-free alkaline dry battery
JP4560129B1 (en) * 2009-09-07 2010-10-13 パナソニック株式会社 Alkaline battery
JP2011216218A (en) * 2010-03-31 2011-10-27 Panasonic Corp Alkaline dry battery

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010029678A1 (en) * 2008-09-12 2010-03-18 パナソニック株式会社 Mercury-free alkaline dry battery
WO2010029679A1 (en) * 2008-09-12 2010-03-18 パナソニック株式会社 Mercury-free alkaline dry battery
CN102150308A (en) * 2008-09-12 2011-08-10 松下电器产业株式会社 Mercury-free alkaline dry battery
JP4560129B1 (en) * 2009-09-07 2010-10-13 パナソニック株式会社 Alkaline battery
WO2011027485A1 (en) * 2009-09-07 2011-03-10 パナソニック株式会社 Alkaline battery
JP2011060440A (en) * 2009-09-07 2011-03-24 Panasonic Corp Alkaline battery
US8343658B2 (en) 2009-09-07 2013-01-01 Panasonic Corporation Alkaline battery having improved high rate discharge capability
JP2011216218A (en) * 2010-03-31 2011-10-27 Panasonic Corp Alkaline dry battery

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