JPS61271747A - Silver oxide cell - Google Patents
Silver oxide cellInfo
- Publication number
- JPS61271747A JPS61271747A JP60113607A JP11360785A JPS61271747A JP S61271747 A JPS61271747 A JP S61271747A JP 60113607 A JP60113607 A JP 60113607A JP 11360785 A JP11360785 A JP 11360785A JP S61271747 A JPS61271747 A JP S61271747A
- Authority
- JP
- Japan
- Prior art keywords
- silver
- silver oxide
- powder
- silver powder
- particle size
- 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
-
- 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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、酸化銀を主剤とした正極を用いる酸化銀電池
に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a silver oxide battery using a positive electrode mainly composed of silver oxide.
従来の技術
従来、酸化銀を主剤とする正極活物質を用いたボタン形
酸化銀電池は、負極に亜鉛を用いた電池が商品化されて
いる。この電池の正極は粒子径が7μ論程度の酸化銀粉
末に5重量%の黒鉛粉末を混合して圧縮成形したものが
用いられている。近年、このボタン形酸化銀電池は、こ
れを電源とする使用機器、例えば電子腕時計、電卓等の
小形。BACKGROUND OF THE INVENTION Conventionally, button-shaped silver oxide batteries using a positive electrode active material containing silver oxide as a main ingredient have been commercialized, and batteries using zinc as a negative electrode have been commercialized. The positive electrode of this battery is made by compression molding a mixture of silver oxide powder with a particle size of about 7 μm and 5% by weight of graphite powder. In recent years, this button-shaped silver oxide battery has been used in small devices such as electronic watches and calculators that use it as a power source.
薄形化に伴い高電気容量化が要望されている。As devices become thinner, higher capacitance is desired.
この高電気容量化として正極体の電導助剤である黒鉛に
比べて嵩密度の高い銀粉末を用いることが提案されてい
る。この方法は、粒子径が約7μlの酸化銀粉末に一般
的に知られている・球状の銀粉末を混合し、圧縮成形し
たものである。この方法を採れば、黒鉛を混合した正極
体に比べ、約1.1倍の高電気容量化が図れる。In order to increase the electric capacity, it has been proposed to use silver powder, which has a higher bulk density than graphite, which is a conductive additive in the positive electrode body. In this method, commonly known spherical silver powder is mixed with silver oxide powder having a particle size of approximately 7 μl, and the mixture is compression molded. If this method is adopted, the electric capacity can be increased by about 1.1 times compared to a positive electrode body containing graphite.
発明が解決しようとする問題点
しかし、銀粉末を混合する場合、正極の活物質である酸
化銀粉末間の電導性を保持させ、かつ高率放電特性を満
足するには、酸化銀粉末に7〜8重量−の銀粉末を加え
る必要がある。したがって、高価格な銀粉末を多量に使
用することから、電池のコストが低価格の黒鉛を使用す
る方法に比べ高くなるという問題点がある。Problems to be Solved by the Invention However, when mixing silver powder, in order to maintain conductivity between the silver oxide powder, which is the active material of the positive electrode, and to satisfy high rate discharge characteristics, it is necessary to add 7% to the silver oxide powder. It is necessary to add ~8 wt. of silver powder. Therefore, since a large amount of expensive silver powder is used, there is a problem that the cost of the battery is higher than that of a method using inexpensive graphite.
本発明は、このような問題点を解決することを目的とし
たものである。The present invention aims to solve these problems.
問題点を解決するための手段
本発明は、粒子径50〜350μmの顆粒状酸化銀に、
厚みが0・05〜0・6μm1粒子径が0.1〜15μ
mのフレーク状銀粉末を混合し、圧縮成形して正極とし
たものである。Means for Solving the Problems The present invention provides granular silver oxide with a particle size of 50 to 350 μm,
Thickness: 0.05-0.6μm 1 Particle size: 0.1-15μ
A positive electrode was prepared by mixing flaky silver powder of m and compression molding.
作用
この構成を採れば、従来の酸化銀粉末に球状の銀粉末を
混合する方法に比べ、少量のフレーク状銀粉末の混合で
高抵抗な酸化銀粉末間の電導性が保持でき、高率放電を
満足することができる。これは、球状銀粉末に比べてフ
レーク状銀粉末は、その表面積が大きく、酸化銀粉末間
に薄く入り込んだ状態で電導性を保たせることができる
。更に酸化銀粉末を顆粒状にすることにより、酸化銀の
表面積が小さくなり、更に少ないフレーク状銀粉末によ
り電導性を保たせることができるからである。Function: Compared to the conventional method of mixing spherical silver powder with silver oxide powder, this configuration allows the conductivity between high-resistance silver oxide powders to be maintained by mixing a small amount of flaky silver powder, resulting in high rate discharge. can be satisfied. This is because the flaky silver powder has a larger surface area than the spherical silver powder, and can maintain conductivity even when thinly intercalated between the silver oxide powders. Furthermore, by making the silver oxide powder into granules, the surface area of the silver oxide becomes smaller, and electrical conductivity can be maintained with even less flaky silver powder.
実施例 以下、本発明の詳細な説明する。Example The present invention will be explained in detail below.
粒子径が150μ■の顆粒状酸化銀に、厚みが0.1μ
m2粒子径が2μmのフレーク状銀粉末を2重量%混合
した。この合剤をムとする。同様に上記フレーク状銀粉
末t−3重量%混合した合剤をB、5重量%混合した合
剤をC17重量%混合した合剤をDとした。次に比較列
として平均粒子径が7μmの酸化銀粉末に粒子径が2μ
mの球状銀粉末を2重量%混合した合剤をX、3重量%
混合したものをF、6重量%混合したものをG、7重量
%混合した合剤をHとして用意した。上記ム〜Hの各合
剤を21秤量し、2ookg/dの圧力で圧縮した条件
で比抵抗を測定した。上記各合剤ム〜Hの比抵抗値を第
1図に示す。Granular silver oxide with a particle size of 150μ■ and a thickness of 0.1μ
2% by weight of flaky silver powder having an m2 particle size of 2 μm was mixed. This mixture is called Mu. Similarly, B was a mixture in which 3% by weight of the flaky silver powder was mixed, and D was a mixture in which 17% by weight of C was a mixture of 5% by weight. Next, as a comparison column, silver oxide powder with an average particle size of 7 μm has a particle size of 2 μm.
A mixture of 2% by weight of spherical silver powder of m is mixed with 3% by weight of X.
The mixture was prepared as F, the mixture of 6% by weight was designated as G, and the mixture of 7% by weight was designated as H. 21 pieces of each of the above mixtures M to H were weighed and the specific resistance was measured under the condition that they were compressed at a pressure of 2 ook kg/d. The specific resistance values of each of the above mixtures M to H are shown in FIG.
この結果から、従来の球状銀粉末を7重量%混合した合
剤Hの比抵抗と、本発明のフレーク状銀粉末を3重量%
混合した合剤Bの比抵抗値がほぼ同じであった。また、
フレーク状銀粉末を混合した合剤は、その混合量が3重
量−以上であれば比抵抗値がほぼ同じになることがわか
った。この比抵抗は、電池に組み立てた場合、著しく大
きいと高率放電時の維持電圧が低くなることが考えられ
る。From this result, the specific resistance of Mixture H, which is a mixture of 7% by weight of conventional spherical silver powder, and 3% by weight of flaky silver powder of the present invention.
The specific resistance values of the mixed mixture B were almost the same. Also,
It was found that the mixture containing flaky silver powder has almost the same specific resistance value if the mixed amount is 3 weight or more. If this specific resistance is significantly large when assembled into a battery, it is thought that the sustaining voltage during high rate discharge will become low.
そこで、次に上記合剤を用いて直径9.6ff、厚み2
ffのボタン形電池を組み立てた。第2図にそ第 2表
単位:V
この結果より従来の球状銀粉末を混合した電池e−fで
は、7重量優混合した電池りでないと、腕時計のランプ
使用時、8mムの電流を流した時の点燈ができなくなる
。このランプに必要、な維持電圧は1.20Vである。Therefore, next, using the above mixture, a diameter of 9.6 ff and a thickness of 2
I assembled a ff button battery. Figure 2 shows Table 2 Units: V These results show that when using a watch lamp, a battery e-f containing conventional spherical silver powder can carry a current of 8 mm when used as a watch lamp, unless the battery contains a mixture of 7% by weight. The light will not turn on when it is turned on. The required maintenance voltage for this lamp is 1.20V.
また、本発明によるフレーク状銀粉末を混合し、組み立
てた電池&−(lでは3重量%を混合すればランプの点
燈が可能である。これは、前記試験結果の比抵抗値と関
連があり、約1oΩ・1以下の値でないと高率放電特性
が満足できないことがわかる。In addition, if the flaky silver powder according to the present invention is mixed with 3% by weight of assembled batteries, it is possible to light the lamp.This is related to the specific resistance value of the test result. It can be seen that the high rate discharge characteristics cannot be satisfied unless the value is about 1 oΩ·1 or less.
上記実施列では粒子径が150μ諺の顆粒状酸化銀を用
いたが、次に粒子径が100μm、50μm。In the above example, granular silver oxide with a particle size of 150 μm was used, and next, particles with a particle size of 100 μm and 50 μm were used.
20μmの顆粒状酸化銀と従来列で使用した7μmの酸
化銀粉末を用いて、上記実施例と同じフレーク状銀粉末
を3重量優混合して上記と同一条件で比抵抗を測定した
。その結果、顆粒状酸化銀で粒子径100μmのものが
0.5Ω・1.50μ重のものが2Ω・1.20μmが
2oΩ・1となり、酸化銀粉末を用いたものは36Ω・
1 となった。このことから高率放電特性を満足するに
は10Ω・1以下が必要であシ、顆粒状酸化銀の粒径が
50μm以上のものが好ましいことがわかった。これは
・酸化銀の表面積が小さい程、酸化銀間の電導性を保持
するための銀量が少なくてよいと思われる。Using 20 μm granular silver oxide powder and 7 μm silver oxide powder used in the conventional column, 3 weights of the same flaky silver powder as in the above example were mixed and the specific resistance was measured under the same conditions as above. As a result, granular silver oxide with a particle size of 100 μm has a value of 0.5Ω, 1.50 μm has a weight of 2Ω, 1.20 μm has a value of 20Ω·1, and silver oxide powder with a particle size of 36Ω·
It became 1. From this, it was found that in order to satisfy high rate discharge characteristics, a resistance of 10 Ω·1 or less is required, and it is preferable that the particle size of the granular silver oxide be 50 μm or more. This seems to be because - the smaller the surface area of silver oxide, the smaller the amount of silver required to maintain conductivity between the silver oxides.
なお、顆粒状酸化銀の粒子径が350μm以上では、非
常に粒子が壊れ易く、秤量時の)くラツキが大きくなる
という問題点ができることから、粒子径50〜350μ
mの顆粒状酸化銀にすることが好ましい。 ・
また、上記実験では厚み0.1μm9粒子径2μmのフ
レーク状銀粉末を用いたが、0.05μ論の厚み以下で
は粒子が壊れ易く製造が難しい。逆に0.5μm以上の
厚みであれば3重量%混合時に比抵抗が10Ω・1以上
となり、電池組立体の高率放電特性が満足できなかった
。またフレーク状銀粉末の粒子径0.1μm以下で3重
量%混合時の比抵抗が10Ω・α以上となシ、粒子径が
15μm以上の場合も1oΩ・1以上となった。これは
、酸化銀粉末にフレーク状銀粉末を混合した場合、粒子
径が15μ論以上のフレーク銀粉末では不均一な混合状
態になシ、また粒子径が0.1μm以下の場合は、二次
粒子を作シ易く均一混合ができないからである。In addition, if the particle size of granular silver oxide is 350 μm or more, the particles are very easy to break and there is a problem that the clutter during weighing becomes large.
It is preferable to form granular silver oxide of m. -Also, in the above experiment, flaky silver powder with a thickness of 0.1 μm and a particle size of 2 μm was used, but if the thickness is less than 0.05 μm, the particles are easily broken and manufacturing is difficult. On the other hand, if the thickness was 0.5 μm or more, the specific resistance would be 10 Ω·1 or more when mixed at 3% by weight, and the high rate discharge characteristics of the battery assembly could not be satisfied. Further, when the particle size of the flaky silver powder was 0.1 μm or less, the specific resistance when mixed at 3% by weight was 10Ω·α or more, and when the particle size was 15 μm or more, it was also 10Ω·1 or more. This means that when flaky silver powder is mixed with silver oxide powder, flake silver powder with a particle size of 15 μm or more will not be in a uniform mixed state, and if the particle size is 0.1 μm or less, secondary This is because particles are easily formed and uniform mixing cannot be achieved.
以上のことから、フレーク状銀粉末の厚みが0.05〜
0.5μm1粒子径かへ1〜15μmであシ、粒子径が
50〜350μmの顆粒状酸化銀を用いることによシ銀
の使用量が従来の7重量−から3重量%に減少でき、少
ない添加量で高率放電特性を満足することができる。From the above, the thickness of flaky silver powder is 0.05~
By using granular silver oxide with a particle size of 50-350 μm, the amount of silver used can be reduced from the conventional 7% by weight to 3% by weight. High rate discharge characteristics can be satisfied depending on the amount added.
発明の効果
以上のように本発明によnば、少ない銀量で高率放電特
性を満足することができ安価な酸化電池が提供できる。Effects of the Invention As described above, according to the present invention, an inexpensive oxidation battery that can satisfy high rate discharge characteristics with a small amount of silver can be provided.
また同一サイズであれば従来の約1.1倍の容量アップ
ができ、時計用電源として好適な酸化銀電池が得られる
。Furthermore, if the size is the same, the capacity can be increased by about 1.1 times compared to the conventional one, and a silver oxide battery suitable as a power source for watches can be obtained.
嬉1図は本発明の実施列における正極合剤の比抵抗値を
示す図、第2図は本発明の実施例における酸化銀電池の
断面図である。
1・・・・・・正極ペレット、2・・・・・・正極ケー
ス、3・・・・・・正極リング、4・・・・・・負極合
剤、6・・・・・・負極ケース、e・・・・・・セパレ
ータ、7・・・・・・含浸材、8・・・・・・シール材
。
代理人の氏名 弁理士 中 尾 敏 男 ほか1名第1
図
!l及粉木テ昆合比率(1量2ジ
/ −−一王極へ°レット
2−一一王極り−ス
8−−−シール材Figure 1 is a diagram showing the specific resistance value of the positive electrode mixture in an embodiment of the present invention, and Figure 2 is a cross-sectional view of a silver oxide battery in an example of the present invention. 1...Positive electrode pellet, 2...Positive electrode case, 3...Positive electrode ring, 4...Negative electrode mixture, 6...Negative electrode case , e... separator, 7... impregnating material, 8... sealing material. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure! l and powder wood and combination ratio (1 quantity 2 di/--to one king pole 2-1 one king pole-su 8---sealing material
Claims (1)
なり、上記顆粒状酸化銀に厚みが0.05〜0.5μm
、粒子径が0.1〜15μmのフレーク状銀粉末を混合
した正極を有する酸化銀電池。The main active material consists of granular silver oxide with a particle size of 50 to 350 μm, and the granular silver oxide has a thickness of 0.05 to 0.5 μm.
, a silver oxide battery having a positive electrode mixed with flaky silver powder having a particle size of 0.1 to 15 μm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60113607A JPS61271747A (en) | 1985-05-27 | 1985-05-27 | Silver oxide cell |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60113607A JPS61271747A (en) | 1985-05-27 | 1985-05-27 | Silver oxide cell |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61271747A true JPS61271747A (en) | 1986-12-02 |
Family
ID=14616501
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60113607A Pending JPS61271747A (en) | 1985-05-27 | 1985-05-27 | Silver oxide cell |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61271747A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004073095A1 (en) * | 2003-02-13 | 2004-08-26 | Dowa Mining Co., Ltd. | Silver oxide powder for alkali battery and process for producing the same |
JP2004265865A (en) * | 2003-02-13 | 2004-09-24 | Dowa Mining Co Ltd | Silver oxide powder for alkaline battery, and manufacturing method of the same |
-
1985
- 1985-05-27 JP JP60113607A patent/JPS61271747A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004073095A1 (en) * | 2003-02-13 | 2004-08-26 | Dowa Mining Co., Ltd. | Silver oxide powder for alkali battery and process for producing the same |
JP2004265865A (en) * | 2003-02-13 | 2004-09-24 | Dowa Mining Co Ltd | Silver oxide powder for alkaline battery, and manufacturing method of the same |
AU2004211104B2 (en) * | 2003-02-13 | 2009-01-29 | Dowa Mining Co., Ltd. | Silver oxide powder for alkaline battery and method of producing the same |
AU2004211104C1 (en) * | 2003-02-13 | 2009-08-13 | Dowa Mining Co., Ltd. | Silver oxide powder for alkaline battery and method of producing the same |
US7771872B2 (en) | 2003-02-13 | 2010-08-10 | Dowa Electronics Materials Co., Ltd. | Silver oxide powder for alkaline battery and method of producing the same |
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