JPS587762A - Silver oxide battery - Google Patents
Silver oxide batteryInfo
- Publication number
- JPS587762A JPS587762A JP10678381A JP10678381A JPS587762A JP S587762 A JPS587762 A JP S587762A JP 10678381 A JP10678381 A JP 10678381A JP 10678381 A JP10678381 A JP 10678381A JP S587762 A JPS587762 A JP S587762A
- Authority
- JP
- Japan
- Prior art keywords
- positive electrode
- battery
- silver oxide
- case
- negative electrode
- 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
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910001923 silver oxide Inorganic materials 0.000 title claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- -1 polytetrafluoroethylene Polymers 0.000 abstract description 5
- 229920002134 Carboxymethyl cellulose Polymers 0.000 abstract description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 abstract description 4
- 235000010948 carboxy methyl cellulose Nutrition 0.000 abstract description 4
- 239000008112 carboxymethyl-cellulose Substances 0.000 abstract description 4
- 239000004698 Polyethylene Substances 0.000 abstract description 3
- 229920000573 polyethylene Polymers 0.000 abstract description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011230 binding agent Substances 0.000 abstract description 2
- 238000001035 drying Methods 0.000 abstract description 2
- 239000003792 electrolyte Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000003973 paint Substances 0.000 abstract description 2
- 239000008188 pellet Substances 0.000 abstract description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract description 2
- 239000004677 Nylon Substances 0.000 abstract 1
- 239000011358 absorbing material Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 239000004745 nonwoven fabric Substances 0.000 abstract 1
- 229920001778 nylon Polymers 0.000 abstract 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 229920000298 Cellophane Polymers 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 101100185405 Schizosaccharomyces pombe (strain 972 / ATCC 24843) mug20 gene Proteins 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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
- H01M4/06—Electrodes for primary cells
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】
本発明は、２価酸化銀を正極活物質の主体とする酸化銀
電池に関するもので、自己放電を抑制するとともに優れ
た放電性能を有する酸化銀電池を提供することを目的と
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a silver oxide battery containing divalent silver oxide as the main positive electrode active material, and aims to provide a silver oxide battery that suppresses self-discharge and has excellent discharge performance. purpose.
２価酸化銀（ムｇｏ）を用いた電池は、従来の１価酸化
銀（ムｇ２０）を用いた電池に比べ約１．．６倍の電気
容量を取り出せることから最近注目されている。この２
価酸化銀活物質を用いた電池として、例えば第１図に示
す構造が提案されている。Batteries using divalent silver oxide (MUG20) are about 1. ．． It has recently attracted attention because it can extract six times the electrical capacity. This 2
For example, a structure shown in FIG. 1 has been proposed as a battery using a silver oxide active material.
この種の電池において、２価酸化銀の性質である酸化力
が強いことから、正極活物質と接するセパレータの酸化
及び銀酸イオンの透過により自己放電が大きい問題点が
あり、短絡を引き起こす場合もある。このため、セパレ
ータの強化、例えばセパレータ層の増加等により短絡を
防止し、自己放電を抑制しようとしているが、セパレー
タ層の増加のために膜抵抗が増大し、電池の内部抵抗が
大きくなって放電性能を悪化させることになっていた。In this type of battery, due to the strong oxidizing power that is the property of divalent silver oxide, there is a problem that self-discharge is large due to oxidation of the separator in contact with the positive electrode active material and permeation of silver acid ions, which may cause short circuits. be. For this reason, efforts are being made to prevent short circuits and suppress self-discharge by strengthening the separator, for example by increasing the number of separator layers, but the increase in the number of separator layers increases membrane resistance, which increases the internal resistance of the battery and causes discharge. It was supposed to worsen performance.
本発明は、以上のような不都合を解消するもので、正極
の負極と対向する表面部に、炭素の多孔質被膜を設ける
ことを特徴とする。The present invention solves the above-mentioned disadvantages, and is characterized by providing a carbon porous coating on the surface of the positive electrode facing the negative electrode.
本発明によれば、自己放電を抑制することができるとと
もに、内部抵抗が小さくなり、放電性能を向上すること
ができる。According to the present invention, self-discharge can be suppressed, internal resistance can be reduced, and discharge performance can be improved.
以下、本発明を実施例により説明する。Hereinafter, the present invention will be explained by examples.
第１図は従来のボタン型酸化銀電池を示す。１は正極端
子を兼ねる電池ケースであり、その内部には絶縁シート
２を入れた後、２価酸化銀に少量のポリ四フッ化エチレ
ン粉末を混合した合剤の予備成形ペレット３と正極リン
グ４を挿入し、ケース内において本成形して正極３およ
びリング４をケース１へ一体に結合している。FIG. 1 shows a conventional button-type silver oxide battery. 1 is a battery case that also serves as a positive electrode terminal, and after putting an insulating sheet 2 inside it, preformed pellets 3 made of a mixture of divalent silver oxide and a small amount of polytetrafluoroethylene powder and a positive electrode ring 4 are placed. The positive electrode 3 and the ring 4 are integrally connected to the case 1 by inserting the positive electrode 3 and the ring 4 into the case.
３べ ；
６は負極端子を兼ねる封口板、６は未化亜鉛粉末にカル
ボキシメチルセルロースを混合した負極、７はポリエチ
レンの多孔フィルムとセロハントノ電解液には酸化亜鉛
を溶解したか性カリ水溶液を用いた。3B; 6 is a sealing plate that also serves as a negative electrode terminal; 6 is a negative electrode made of unprocessed zinc powder mixed with carboxymethyl cellulose; 7 is a polyethylene porous film; and the cellophantic electrolyte is a caustic potassium aqueous solution in which zinc oxide is dissolved. .
上記構成の従来電池をムとじ、セパレータ７として、ポ
リエチレンの多孔フィルム２枚とセロハンからなる３層
構成の電池をＢとする。次に、第２図のように、電池ケ
ース１に結合した正極の露出表面に、結着剤にカルボキ
シメチルセルロースを含むカーボン塗料（日本黒鉛工業
（株）のバニーハイＭＶ−９６）を乾燥後の塗着量とし
て６暫−の割合で塗布し、乾燥して多孔質炭素被膜１ｏ
を形成した。その他の条件は電池ムと同じにして本発明
による電池Ｃを構成した。電池のサイズは、いずれも直
径１１．６ｍ、高さ４．２層ｍである。The conventional battery having the above configuration was glued together, and a battery B had a three-layer configuration consisting of two polyethylene porous films and cellophane as the separator 7. Next, as shown in Fig. 2, after drying, carbon paint (Bunny High MV-96 from Nippon Graphite Industries Co., Ltd.) containing carboxymethyl cellulose as a binder is applied to the exposed surface of the positive electrode bonded to the battery case 1. It is applied at a rate of 6 parts and dried to form a porous carbon film of 1 part.
was formed. A battery C according to the present invention was constructed under the same conditions as the battery M. The size of each battery is 11.6 m in diameter and 4.2 m in height.
これらの電池について、ｅｏ’ｃにおいて２０日間保存
したときの自己放電率の比較を第１表に示す。Table 1 shows a comparison of the self-discharge rates of these batteries when stored at EO'C for 20 days.
第１表
この結果から明らかなように、従来電池Ｂと本発明の電
池Ｃがほぼ同じ自己放電率を示し、電池Ｃと同じセパレ
ータ構成の従来電池ムの自己放電率が大きい。また、更
に６０ ′０で４０日間保存を続けると、従来電池ムは
１０セル中４セルのショート現象が生じ、他の従来電池
Ｂ、および本発明の電池Ｃにはショート現象がなかった
。Table 1 As is clear from the results, conventional battery B and battery C of the present invention exhibit almost the same self-discharge rate, and the conventional battery with the same separator configuration as battery C has a higher self-discharge rate. Furthermore, when the storage was continued for 40 days at 60'0, 4 out of 10 cells of the conventional battery were short-circuited, while the other conventional battery B and the battery C of the present invention had no short-circuit phenomenon.
次に１０％ムの電流で放電した場合の６秒後の電圧を比
較した結果を第２表に示す。Next, Table 2 shows the results of comparing the voltages after 6 seconds when discharging with a current of 10%.
６、−２
第２表
上記結果より従来電池ムと電池Ｂの差はセパレータ層が
２層と３層の差であり、゛セパレータ層の膜抵抗の差に
よるものと考えられる。また、同一セパレータ構成の電
池ムと電池Ｃの差は、本発明電池の場合、負極と対向す
る正極表面部に炭素の多孔層があるために、集電体とし
て働き集電面積の増大によるものである。6, -2 Table 2 From the above results, the difference between the conventional battery group and battery B is the difference between two separator layers and three separator layers, and is thought to be due to the difference in membrane resistance of the separator layers. In addition, the difference between Battery M and Battery C, which have the same separator configuration, is that in the case of the battery of the present invention, there is a porous layer of carbon on the surface of the positive electrode that faces the negative electrode, which acts as a current collector and increases the current collecting area. It is.
以上のように、本発明によれば、２価酸化銀によるセパ
レータの酸化を防止できるとともに、正極の集電面積を
大きくすることができ、自己放電が少なく、放電性能、
特に高率放電特性の向上を図ることができる。As described above, according to the present invention, it is possible to prevent the oxidation of the separator due to divalent silver oxide, and also to increase the current collection area of the positive electrode, resulting in less self-discharge and improved discharge performance.
In particular, it is possible to improve high rate discharge characteristics.
第１図は従来の酸化銀電池の縦断面図、第２図は本発明
の実施例の正極部分の縦断面図を示す。
３・・・・・・正極、６・・・・・・負極、１０・・・
１．・炭素被膜。FIG. 1 is a longitudinal sectional view of a conventional silver oxide battery, and FIG. 2 is a longitudinal sectional view of a positive electrode portion of an embodiment of the present invention. 3...Positive electrode, 6...Negative electrode, 10...
1.・Carbon coating.
Claims (1)
多孔質被膜を設けたことを特徴とする酸化銀電池。A silver oxide battery characterized in that a porous carbon coating is provided on the surface of a positive electrode containing divalent silver oxide facing a negative electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10678381A JPS587762A (en) | 1981-07-07 | 1981-07-07 | Silver oxide battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10678381A JPS587762A (en) | 1981-07-07 | 1981-07-07 | Silver oxide battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS587762A true JPS587762A (en) | 1983-01-17 |
Family
ID=14442491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10678381A Pending JPS587762A (en) | 1981-07-07 | 1981-07-07 | Silver oxide battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS587762A (en) |
-
1981
- 1981-07-07 JP JP10678381A patent/JPS587762A/en active Pending
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