JPS58163167A - Silver oxide cell - Google Patents

Silver oxide cell

Info

Publication number
JPS58163167A
JPS58163167A JP57045271A JP4527182A JPS58163167A JP S58163167 A JPS58163167 A JP S58163167A JP 57045271 A JP57045271 A JP 57045271A JP 4527182 A JP4527182 A JP 4527182A JP S58163167 A JPS58163167 A JP S58163167A
Authority
JP
Japan
Prior art keywords
silver oxide
manganese dioxide
positive pole
black mixture
negative pole
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
Application number
JP57045271A
Other languages
Japanese (ja)
Inventor
Akio Yamamoto
山本　昭雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maxell Ltd
Original Assignee
Hitachi Maxell Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP57045271A priority Critical patent/JPS58163167A/en
Publication of JPS58163167A publication Critical patent/JPS58163167A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/54—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of silver
    • 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

PURPOSE:To keep down the oxidative deterioration in a separator, by forming the silver oxide into a structure being coated with manganese dioxide more feeble in the force of oxidization. CONSTITUTION:A negative pole terminal plate 6 serving as a negative pole collector body charged with a negative pole agent 2 inside a fitted into the opening part of a positive pole can 5 seen likely nickel-plating an iron provided with positive pole black mixture 1, a separator 4 and an electrolyte absorbent 3 via various resins including nylon, polyethylene, polypropylene, etc., or a section L-shaped ring gasket 7 of rubber make, and the inner part of a cell is rendered airtight in structure by fastening the positive pole can 5 inward. The above-mentioned positive pole black mixture 1 is made up in the following process that silver oxide powder is granulated into 100-300mum or so in advance, then a manganese dioxide of about 2-20mum is mixed with this granulated silver oxide and, at the time of this mixing, each surface of the said silver oxide granule is layered by dint of the moisture absorption and water absorbability of the manganese dioxide. This black mixture is press-molded into the specified thickness by means of a routine process. The amount of the said manganese dioxide used is set at 2-7pts.wt. to 100pts.wt. of the silver oxide.

Description

【発明の詳細な説明】 この発明は酸化銀を主たる陽極活物質としこれに少量の
二酸化マンガンを加えた酸化銀電池に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a silver oxide battery in which silver oxide is used as the main anode active material and a small amount of manganese dioxide is added thereto.

酸化銀電池では、陽極活物質としての酸化銀に少量の二
酸化マンガンを配合することがよく行なわれている。二
酸化マンガンを加えると、放電圧の高い酸化銀と放電圧
の低い二酸化マンガンとの電位差により、電池寿命を事
前にキャッチできるなどの利点か得られるからである。In silver oxide batteries, it is common practice to mix a small amount of manganese dioxide with silver oxide as the positive electrode active material. This is because when manganese dioxide is added, the potential difference between silver oxide, which has a high discharge voltage, and manganese dioxide, which has a low discharge voltage, provides advantages such as being able to predict the battery life in advance.

ところで、このような混合陽極を得る場合、一般には、
酸化銀と二酸化マンガンとを粉末状で混合し、これを加
圧成形する方法がとられるが、粉末混合物では成形しに
くい欠点があり、成形できたとしても充分な強度を持た
せにくい。そこで、上記混合物を顆粒状とし、これを加
圧成形に供することが試みられたが、この方法でも満足
できる成形性は得られなかった。この理由は、二酸化マ
ンガンがそれ自体ポーラスで水分を吸収しやすいもので
あるため、これを酸化銀と混合して顆粒状としても、水
分吸収によって顆粒状態での強度を充分に保ちにくいた
めである。By the way, when obtaining such a mixed anode, generally,
A method of mixing silver oxide and manganese dioxide in powder form and press-molding this is used, but a powder mixture has the disadvantage that it is difficult to mold, and even if it can be molded, it is difficult to provide sufficient strength. Therefore, an attempt was made to make the above mixture into granules and subject them to pressure molding, but even with this method, satisfactory moldability could not be obtained. The reason for this is that manganese dioxide itself is porous and easily absorbs water, so even if it is mixed with silver oxide and made into granules, it is difficult to maintain sufficient strength in the granule state due to water absorption. .

この発明者らは、かかる観点から鋭意検討した結果、酸
化銀と二酸化マンガンとを粉末状で混合するのではなく
、まず酸化銀だけを顆粒状となしこれに微粉末状の二酸
化マンガンを混合させるようにしたところ、顆粒状酸化
銀の表面に」−記二酸化マンガンが付着し水分吸収によ
って容易に層形成されて、強度的安定な顆粒状陽極合剤
となりうろことを知り、この発明を完成するに至ったも
のである。As a result of intensive studies from this point of view, the inventors found that instead of mixing silver oxide and manganese dioxide in powder form, they first made only silver oxide into granules and mixed finely powdered manganese dioxide therein. As a result, he learned that manganese dioxide adhered to the surface of granular silver oxide and easily formed a layer due to moisture absorption, forming a granular anode mixture with stable strength, and completed this invention. This is what led to this.

以下に、この発明の一実施例を図面を参考にして説明す
る。An embodiment of the present invention will be described below with reference to the drawings.

第１図はこの発明の酸化銀電池の一例を示したもので、
■は陽極合剤、２はアマルガム化した亜、鉛粉などを活
物質とした陰極剤、３は上記陰極剤２に接触するビニロ
ン−レーヨン混抄紙や不織布の如き電解液吸収体、４は
」−記吸収体３と」−記陽極合剤１との間に介装された
セロハンと微孔性ポリプロピレンフィルムないしポリエ
チレングラフト重合フィルムなどとからなるセパレータ
である。Figure 1 shows an example of the silver oxide battery of this invention.
(2) is an anode mixture; (2) is a cathode material containing amalgamated zinc or lead powder as an active material; (3) is an electrolyte absorber such as vinylon-rayon mixed paper or nonwoven fabric that comes into contact with the cathode material (2); This is a separator made of cellophane and a microporous polypropylene film or a polyethylene graft polymer film interposed between the absorber 3 and the anode mixture 1.

５は上記陽極合剤１．セパレータ４および電解液吸収体
３を内填させた鉄にニッケルメッキを施した如き陽極缶
であり、この缶５の開口部に、陰極剤２が内填された陰
極集電体としての陰極端子板６を、ナイロン、ポリエチ
レン、ポリプロピレンなどの各種樹脂もしくはゴムから
なる断面り字状の環状ガスケット７を介して嵌合させ、
陽極缶５を内方へ締め付けて電池内部を密閉構造にして
いる。5 is the above anode mixture 1. It is an anode can made of nickel-plated iron in which a separator 4 and an electrolyte absorber 3 are filled, and a cathode terminal as a cathode current collector is filled with a cathode agent 2 in the opening of the can 5. The plates 6 are fitted through an annular gasket 7 with a cross-section made of various resins such as nylon, polyethylene, polypropylene, or rubber, and
The anode can 5 is tightened inward to create a sealed structure inside the battery.

−１−記陽極合剤１は、予め酸化銀粉末を１００〜３０
０μ程度の顆粒状となし、これに２〜２０μ程度の二酸
化マンガンを混合して、この混合時に二酸化マンガンの
吸湿、吸水性によって上記酸化銀顆粒物の表面に層状に
付着させてなるものであり、これを常法によって所定厚
みに加圧成形するが、この成形後も」１記二酸化マンガ
ンの付着層はそのまま保持されている。−Ｉ−記二酸化
マンガンの使用用は、酸化銀１００重附部に対して２〜
７重量部に設定されている。-1- The anode mixture 1 contains 100 to 30% silver oxide powder in advance.
The silver oxide granules are made into granules of about 0 μm, mixed with manganese dioxide of about 2 to 20 μm, and adhered to the surface of the silver oxide granules in a layered manner due to the moisture absorption and water absorption properties of the manganese dioxide during this mixing. This is pressure molded to a predetermined thickness by a conventional method, but even after this molding, the adhesion layer of manganese dioxide described in 1. is maintained as it is. -I- The use of manganese dioxide is 2 to 2 to 100 parts of silver oxide.
It is set at 7 parts by weight.

このように、この発明の設化銀電池は、陽極合剤を強度
充分な顆粒状となすことができるから、その成形作業性
か大巾に改善されるとともに、酸化銀がこれよりも酸化
力の弱い二酸化マンガンで被覆された構造となっている
ため、セパレータの酸化劣化を抑制できる、二酸化マン
ガン付着層が相互に鎖状につながって放電反応に好結果
を与えるなどのほか、二酸化マンガンの吸湿、吸液性に
起因して重負荷放電特性が大きく改善されるなどの効果
かもたらされる。As described above, in the silver oxide battery of the present invention, since the anode mixture can be made into granules with sufficient strength, its molding workability is greatly improved, and silver oxide has a higher oxidizing power than granules. Because it has a structure coated with manganese dioxide, which has a weak oxidation, it can suppress oxidative deterioration of the separator, and the manganese dioxide adhesion layers are connected to each other in a chain form, giving good results to the discharge reaction. Due to its liquid absorption properties, it brings about effects such as greatly improved heavy load discharge characteristics.

第２図は、この発明の酸化第一銀電池につき、」−記の
重負荷放電特性を示したもので、０．０２５＋（Ω負荷
のもとての放電時間と端子電圧との関係を調べた結果で
ある。図中、曲線−１は本発明品の結果、曲線−２は粉
末状混合に係る従来品の結果である。この放電曲線から
も、この発明の酸化銀電池がすぐれた性能を有している
ものであることがわかる。ところで、この発明の上記酸
化銀電池は、上述の如くすぐれた性能を有しているが、
その反面二酸化マンガンで完全に被覆されていることに
よって電子伝導性がそれだけ阻害されていることとなる
。したがって、この種の電池では、使用当初に通常予備
放電を行なって酸化銀表面に導電性銀層を形成するよう
にしておくのが望ましい。Figure 2 shows the heavy load discharge characteristics of the silver oxide battery of the present invention. In the figure, curve 1 is the result of the product of the present invention, and curve 2 is the result of the conventional product related to powder mixture.This discharge curve also shows that the silver oxide battery of the present invention has excellent performance. By the way, although the silver oxide battery of the present invention has excellent performance as described above,
On the other hand, since it is completely covered with manganese dioxide, electronic conductivity is inhibited to that extent. Therefore, in this type of battery, it is usually desirable to perform preliminary discharge at the beginning of use to form a conductive silver layer on the silver oxide surface.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの発明の酸化銀電池の一例を示す断面図、第
２図は上記電池の重負荷放電特性を示す特性図である。 １・・・陽極合剤。 特許出願人　　日立マクセル株式会社 代理人弁理士　　祢亘元　邦　督 第１図 第２図 ２０　４０　６０　８０　１００ 放電時間（分）FIG. 1 is a sectional view showing an example of the silver oxide battery of the present invention, and FIG. 2 is a characteristic diagram showing the heavy load discharge characteristics of the battery. 1... Anode mixture. Patent Applicant: Hitachi Maxell Co., Ltd. Representative Patent Attorney: Gen. Nakamoto Figure 1 Figure 2 20 40 60 80 100 Discharge time (minutes)

Claims (1)

【特許請求の範囲】[Claims] （１）顆粒状とした酸化銀の表面に微粒子状の二酸化マ
ンガンからなる付着層を設けて陽極合剤を構成したこと
を特徴とする酸化銀電池。(1) A silver oxide battery characterized in that an adhesion layer made of particulate manganese dioxide is provided on the surface of granular silver oxide to constitute an anode mixture.
JP57045271A 1982-03-19 1982-03-19 Silver oxide cell Pending JPS58163167A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57045271A JPS58163167A (en) 1982-03-19 1982-03-19 Silver oxide cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57045271A JPS58163167A (en) 1982-03-19 1982-03-19 Silver oxide cell

Publications (1)

Publication Number Publication Date
JPS58163167A true JPS58163167A (en) 1983-09-27

Family

ID=12714644

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57045271A Pending JPS58163167A (en) 1982-03-19 1982-03-19 Silver oxide cell

Country Status (1)

Country Link
JP (1) JPS58163167A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6030600A (en) * 1996-11-08 2000-02-29 Dowa Mining Co., Ltd. Silver oxide for use in cells and a process for producing the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS579063A (en) * 1980-06-19 1982-01-18 Toshiba Battery Co Ltd Alkaline battery

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS579063A (en) * 1980-06-19 1982-01-18 Toshiba Battery Co Ltd Alkaline battery

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6030600A (en) * 1996-11-08 2000-02-29 Dowa Mining Co., Ltd. Silver oxide for use in cells and a process for producing the same
US6086845A (en) * 1996-11-08 2000-07-11 Dowa Mining Co., Ltd. Silver oxide for use in cells and a process for producing the same

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