JPH0125417Y2 - - Google Patents
Info
- Publication number
- JPH0125417Y2 JPH0125417Y2 JP3687982U JP3687982U JPH0125417Y2 JP H0125417 Y2 JPH0125417 Y2 JP H0125417Y2 JP 3687982 U JP3687982 U JP 3687982U JP 3687982 U JP3687982 U JP 3687982U JP H0125417 Y2 JPH0125417 Y2 JP H0125417Y2
- Authority
- JP
- Japan
- Prior art keywords
- catalyst layer
- positive electrode
- negative electrode
- water
- electrode catalyst
- 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.)
- Expired
Links
- 239000003054 catalyst Substances 0.000 claims description 12
- 239000011701 zinc Substances 0.000 claims description 12
- 239000005871 repellent Substances 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 9
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- 239000003792 electrolyte Substances 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 4
- 229920003002 synthetic resin Polymers 0.000 claims description 4
- 239000000057 synthetic resin Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 208000028659 discharge Diseases 0.000 description 9
- 206010003497 Asphyxia Diseases 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000003411 electrode reaction Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000002940 repellent Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
Classifications
-
- Y02E60/128—
Landscapes
- Hybrid Cells (AREA)
Description
【考案の詳細な説明】
本考案は、ボタン型空気−亜鉛電池の改良に関
するもので、その目的とするところは高率放電時
において負極反応生成物の体積増加に伴い、正極
触媒層が変形して撥水膜の細孔を圧縮、閉塞する
ことにより、空気中の酸素の正極触媒層への拡散
不足の結果起こる窒息現象を防止することにあ
る。[Detailed description of the invention] This invention relates to the improvement of a button-type air-zinc battery, and its purpose is to prevent the positive electrode catalyst layer from deforming as the volume of the negative electrode reaction product increases during high rate discharge. By compressing and closing the pores of the water-repellent membrane, the purpose is to prevent the suffocation phenomenon that occurs as a result of insufficient diffusion of oxygen in the air to the positive electrode catalyst layer.
従来のボタン型空気−亜鉛電池の部分断面図を
第１図に示した。この種空気電池は、正極容器１
の底部に設けられた空気取入孔２から流入した空
気中の酸素を正極触媒層３に供給し、ここで活性
化する。この正極触媒層３ならびにこれとはセパ
レータ４、含液層５で隔離された負極容器６内の
アルカリ電解液を含んだ負極亜鉛７とで、正、負
両極が構成されている。この電池を放電すると負
極側では
Zn＋20H-→Zn（OH）2＋2e …(1)
Zn（OH）2→ZnO＋H2O …(2)
の反応が進行すると考えられている。放電が低率
のゆるやかな場合は、(2)の反応まで進行し、負極
反応生成物の体積増加は比較的少ないが、高率放
電では(2)の反応まで充分に進まず、体積の大きな
Zn（OH）2が生成する。このため負極部イの体積
が放電とともに増大しつづけ、遂には正極触媒層
３を変形させ、ポリ４フツ化エチレンの多孔体か
らなる撥水膜８が支持体９との間で圧縮され、撥
水膜の孔を閉塞する。このため、撥水膜８を通つ
て正極触媒層３へ空気が供給されないため、窒息
して、負極活性物質が残存するにもかかわらず、
電池が放電しなくなるという現象を呈していた。
このため負極容器６中に充填する亜鉛粉末とアル
カリ電解液は制限を受けることになり、負極部に
空孔体を入れて充填量を減少させ、窒息現象を除
くなどの工夫がなされていたが、十分でなかつ
た。なお１０は絶縁ガスケツトである。 A partial cross-sectional view of a conventional button-type air-zinc battery is shown in FIG. This type of air battery has a positive electrode container 1
Oxygen in the air that has flowed in through the air intake hole 2 provided at the bottom of the cathode catalyst layer 3 is supplied to the cathode catalyst layer 3, where it is activated. This positive electrode catalyst layer 3 and a negative electrode zinc 7 containing an alkaline electrolyte in a negative electrode container 6 separated from this by a separator 4 and a liquid-containing layer 5 constitute both positive and negative electrodes. It is thought that when this battery is discharged, the following reaction progresses on the negative electrode side: Zn+20H - →Zn(OH) 2 +2e...(1) Zn(OH) 2 →ZnO+ H2O ...(2). When the discharge is slow at a low rate, the reaction proceeds to (2), and the volume increase of the negative electrode reaction product is relatively small. However, when the discharge is at a high rate, the reaction does not proceed sufficiently to the reaction (2), and the volume increase is large.
Zn(OH) 2 is produced. For this reason, the volume of the negative electrode part A continues to increase with discharge, eventually deforming the positive electrode catalyst layer 3, and the water-repellent film 8 made of a porous material of polytetrafluoroethylene is compressed between it and the support 9, and the water-repellent film 8 becomes repellent. Blocks the pores of the water film. For this reason, air is not supplied to the positive electrode catalyst layer 3 through the water-repellent film 8, so it is suffocated and the negative electrode active material remains.
The problem was that the battery stopped discharging.
For this reason, the amount of zinc powder and alkaline electrolyte that can be filled into the negative electrode container 6 is limited, and measures have been taken to eliminate the suffocation phenomenon by inserting a porous material into the negative electrode part to reduce the amount of filling. , it wasn't enough. Note that 10 is an insulating gasket.
本考案は負極部の体積膨張が撥水膜へ与える影
響をできるだけ緩和させることにあり、以下一実
施例により詳述する。 The purpose of the present invention is to alleviate the influence of the volumetric expansion of the negative electrode portion on the water-repellent film as much as possible, and will be described in detail below using one example.
本考案の電池は基本的には第１図に示す従来の
電池と構造的に同じであるが、第２図に示すよう
に、正極触媒層３と撥水膜８との間に、耐電解液
性のある金属板または合成樹脂板からなる多孔体
１１が介在している点が特徴である。この多孔体
は金属板に数多くの透孔を設けたものや、合成樹
脂板に透孔を設けたものである。金属板を使用す
る場合には、アルカリ電解液が正極触媒層３を浸
透して多孔体を濡らす場合があるので、電解液に
よつて腐蝕されず、しかも剛性が大きいものとし
てはステンレス綱類、バネ鋼に限定される。合成
樹脂ではポリカーボネート樹脂、ポリスフオン樹
脂などが使用できる。透孔の量は、開孔率におい
て板材全面積の30〜60％を占めるよう孔径0.5〜
１mm程度の孔が多数設けられている。実施例では
0.1mm厚のSUS430のステンレス鋼板を使用し、孔
径0.8mmの孔が板材全面積のの50％を占める多孔
体１１を用いた。第３図は同要部の拡大断面図で
ある。 The battery of the present invention is basically structurally the same as the conventional battery shown in FIG. 1, but as shown in FIG. It is characterized by the presence of a porous body 11 made of a liquid metal plate or synthetic resin plate. This porous body is a metal plate with many through holes or a synthetic resin plate with through holes. When using a metal plate, the alkaline electrolyte may permeate the positive electrode catalyst layer 3 and wet the porous body, so stainless steel plates, which are not corroded by the electrolyte and have high rigidity, are recommended. Limited to spring steel. As synthetic resins, polycarbonate resin, polysphone resin, etc. can be used. The amount of through holes is 0.5~60% of the total area of the board in terms of open area ratio.
Many holes of about 1 mm are provided. In the example
A 0.1 mm thick SUS430 stainless steel plate was used, and the porous body 11 had pores with a diameter of 0.8 mm occupying 50% of the total area of the plate. FIG. 3 is an enlarged sectional view of the main part.
多孔体の開孔率が一般に60％以上では、多孔体
としての強度が減少するので好ましくなく、また
逆に30％以下では撥水膜が加圧され、窒息現象に
陥つて空気流通が悪化するので不適である。しか
し多孔体の開孔率を30〜60％とし、かつ孔径を
0.5〜１mm程度に保てば、孔に対応した撥水膜は
加圧されても孔内に入り込んで窒息することはな
く、空気の流通を可能に保てる。孔径と孔形状は
空気流通を円滑にし、かつ圧縮による変形に耐え
うるように設計されている。 Generally, if the porosity of the porous body is more than 60%, it is undesirable because the strength of the porous body decreases, and conversely, if it is less than 30%, the water-repellent membrane will be pressurized, resulting in suffocation and poor air circulation. Therefore, it is inappropriate. However, when the porosity of the porous body is set to 30 to 60% and the pore size is
If the width is maintained at about 0.5 to 1 mm, the water-repellent film corresponding to the hole will not get into the hole and suffocate even if pressurized, and air can circulate. The pore size and shape are designed to allow smooth air circulation and to withstand deformation due to compression.
本考案の多孔体１１を用いたR44サイズの電池
をＡとし、従来の同型電池をＢとし、負極容器へ
の負極発電要素の体積充填率を容器体積の90％に
した時の放電特性を第４図に示した。それぞれの
電池に100の負荷をつないで放電した。図から
明らかなように、放電量が300mAh程度から従来
品は窒息現象が始まつているが、本考案品は放電
の最終時期まで窒息現象をなくすことができる。 A battery of R44 size using the porous body 11 of the present invention is designated as A, a conventional battery of the same type is designated as B, and the discharge characteristics when the volumetric filling rate of the negative electrode power generating element into the negative electrode container is 90% of the container volume are It is shown in Figure 4. Each battery was connected to 100 loads and discharged. As is clear from the figure, the suffocation phenomenon begins with the conventional product when the discharge amount is around 300 mAh, but the product of the present invention can eliminate the suffocation phenomenon until the final stage of discharge.
このように本考案は極めて単純なものである
が、ボタン型空気−亜鉛電池の高放電容量化に大
きな効果を発揮するものである。 Although the present invention is extremely simple, it is highly effective in increasing the discharge capacity of button-type air-zinc batteries.
第１図は従来のボタン型空気−亜鉛電池の半断
面図、第２図は本考案の実施例におけるボタン型
空気−亜鉛電池の半断面図、第３図は同要部の拡
大断面図、第４図は同電池の放電特性を示す図で
ある。
１……正極容器、２……空気取入孔、３……正
極触媒層、４……セパレータ、６……負極容器、
７……負極亜鉛、８……撥水膜、１１……剛性を
有した多孔体。
FIG. 1 is a half-sectional view of a conventional button-type air-zinc battery, FIG. 2 is a half-sectional view of a button-type air-zinc battery according to an embodiment of the present invention, and FIG. 3 is an enlarged sectional view of the same essential parts. FIG. 4 is a diagram showing the discharge characteristics of the same battery. 1... Positive electrode container, 2... Air intake hole, 3... Positive electrode catalyst layer, 4... Separator, 6... Negative electrode container,
7...Negative electrode zinc, 8...Water repellent film, 11...Porous body with rigidity.
Claims (1)
空気取入側に位置した撥水膜を備え、前記正極触
媒層と撥水膜との間に、孔径0.5〜１mmの孔が30
〜60％の開孔率で形成されている耐電解液性の金
属板または合成樹脂板からなる多孔体を介在した
ボタン型空気−亜鉛電池。 A sub-negative electrode, a positive electrode catalyst layer, and a water-repellent membrane located on the air intake side of the positive electrode catalyst layer are provided, and between the positive electrode catalyst layer and the water-repellent membrane, there are 30 pores with a pore diameter of 0.5 to 1 mm.
A button-type air-zinc battery with a porous body made of an electrolyte-resistant metal plate or synthetic resin plate with a porosity of ~60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3687982U JPS58139674U (en) | 1982-03-15 | 1982-03-15 | Button air-zinc battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3687982U JPS58139674U (en) | 1982-03-15 | 1982-03-15 | Button air-zinc battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58139674U JPS58139674U (en) | 1983-09-20 |
| JPH0125417Y2 true JPH0125417Y2 (en) | 1989-07-31 |
Family
ID=30048295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3687982U Granted JPS58139674U (en) | 1982-03-15 | 1982-03-15 | Button air-zinc battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58139674U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008071579A (en) * | 2006-09-13 | 2008-03-27 | Matsushita Electric Ind Co Ltd | Air battery |
-
1982
- 1982-03-15 JP JP3687982U patent/JPS58139674U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58139674U (en) | 1983-09-20 |
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