JPS6369142A - Cadmium electrode for alkaline battery - Google Patents
Cadmium electrode for alkaline batteryInfo
- Publication number
- JPS6369142A JPS6369142A JP61213231A JP21323186A JPS6369142A JP S6369142 A JPS6369142 A JP S6369142A JP 61213231 A JP61213231 A JP 61213231A JP 21323186 A JP21323186 A JP 21323186A JP S6369142 A JPS6369142 A JP S6369142A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- cadmium
- battery
- cadmium electrode
- conductive layer
- 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
- 229910052793 cadmium Inorganic materials 0.000 title claims abstract description 27
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 title claims abstract description 27
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000005871 repellent Substances 0.000 claims abstract description 14
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 11
- 239000011347 resin Substances 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 4
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 9
- 238000011282 treatment Methods 0.000 abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 230000002940 repellent Effects 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 7
- 239000003792 electrolyte Substances 0.000 abstract description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 abstract 2
- 229910052731 fluorine Inorganic materials 0.000 abstract 2
- 239000011737 fluorine Substances 0.000 abstract 2
- 238000007747 plating Methods 0.000 description 7
- 238000007599 discharging Methods 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- CXKCTMHTOKXKQT-UHFFFAOYSA-N cadmium oxide Inorganic materials [Cd]=O CXKCTMHTOKXKQT-UHFFFAOYSA-N 0.000 description 3
- CFEAAQFZALKQPA-UHFFFAOYSA-N cadmium(2+);oxygen(2-) Chemical compound [O-2].[Cd+2] CFEAAQFZALKQPA-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003518 caustics Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000007772 electroless plating Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 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
- H01M4/24—Electrodes for alkaline accumulators
- H01M4/246—Cadmium electrodes
-
- 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、電池用とくに密閉形のニッケルーカドミウム
蓄電池のカドミウム電極に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cadmium electrode for batteries, particularly for sealed nickel-cadmium storage batteries.
従来の技術
各種の電源のうち、二次電池としては、鉛蓄電池とアル
カリ蓄電池とが広く使われている。BACKGROUND OF THE INVENTION Among various power sources, lead-acid batteries and alkaline batteries are widely used as secondary batteries.
後者のアルカリ蓄電池では、最も広く使われているのは
、ニッケルーカドミウム蓄電池であり、密閉形構造の採
用が実用の範囲を広げる大きな要因になった。Among the latter alkaline storage batteries, the most widely used one is the nickel-cadmium storage battery, and the adoption of a sealed structure was a major factor in expanding the range of practical use.
また、電極として焼結式ニッケル極が開発されたことか
ら、放電特性とくに高率放電にすぐれ、また、寿命も長
い。さらに過充電や放置などによる性能の劣化も少なく
、低温でも性能がよい。このような特性の上に密閉化が
可能になり、使い易さと信頼性が向上した。In addition, since a sintered nickel electrode was developed as an electrode, it has excellent discharge characteristics, especially high rate discharge, and has a long life. Furthermore, there is little performance deterioration due to overcharging or neglect, and performance is good even at low temperatures. In addition to these characteristics, it has become possible to seal the device, improving ease of use and reliability.
このような密閉形蓄電池を各種のポータプル機器に用い
るようになってから、まず高エネルギー密度が要求され
た。これについては、電極に関する容量密度の向上によ
って対応している。最近では、その他に急速充電への要
望が強い。After such sealed storage batteries began to be used in various portable devices, high energy density was first required. This is being addressed by increasing the capacitance density of the electrodes. Recently, there has also been a strong demand for rapid charging.
密閉形のニッケルーカドミウム蓄電池の密閉化の原理は
、いわゆるノイマン方式として知られ、充電完了時にニ
ッケル極から発生する酸素をカドミウム極で吸収し、カ
ドミウム極を過充電状態にしないことによシ、酸素も水
素も発生させないことを基本にしている。The principle of sealing a sealed nickel-cadmium storage battery is known as the so-called Neumann method, in which oxygen generated from the nickel electrode is absorbed by the cadmium electrode when charging is complete, and the cadmium electrode is prevented from becoming overcharged. The basic principle is that neither oxygen nor hydrogen is generated.
したがって急速充電を可能にするためには、カドミウム
極による酸素ガスの吸収をできるだけ迅速に行なわせる
ことが必要である。事実、たとえば１時間率充電を行な
い、充電完了を電圧や温度で検知して過充電状態になる
と充電電流を減少させる方式で急速充電が可能になって
いる。Therefore, in order to enable rapid charging, it is necessary for the cadmium electrode to absorb oxygen gas as quickly as possible. In fact, rapid charging is now possible, for example, by performing charging at a one-hour rate, detecting the completion of charging based on voltage or temperature, and reducing the charging current when an overcharged state occurs.
さらに、カドミウム極の酸素との反応を助けるために、
白金、パラジウムなどの酸素イオン化触媒を加える試み
があり、それなりの効果があった。Furthermore, to help the reaction of the cadmium electrode with oxygen,
Attempts have been made to add oxygen ionization catalysts such as platinum and palladium, which had some success.
しかし、これらの添加は、加えすぎると高価になるし、
加える工程が複雑であるなどの理由で採用されていない
のが現状である。However, these additives become expensive if added too much,
Currently, it has not been adopted due to the complicated process of adding it.
その他にカドミウム極の表面に、銅や銅の上にニッ゛ケ
ルあるいは炭素などの導電性の層を形成することも効果
があることが明らかにされている。It has also been shown that forming a conductive layer of copper or nickel or carbon on top of copper on the surface of the cadmium electrode is also effective.
また、一方、燃料電池のガス拡散電極の技術を活用して
、カドミウム極にフッソ樹脂で撥水処理を行なうことも
、ガス吸収反応を促進する効果がある。したがって急速
充電に効果がある。しかし、この手段のみでは、やはり
不十分である。つまり、撥水処理を十分性なうとガスの
吸収には都合がよいが、放電時に電圧の低下がやや大き
くなる。撥水処理が不十分であれば、その逆になる。On the other hand, applying water-repellent treatment to the cadmium electrode with fluorocarbon resin using technology for gas diffusion electrodes in fuel cells also has the effect of promoting gas absorption reactions. Therefore, it is effective for rapid charging. However, this means alone is still insufficient. In other words, if the water repellent treatment is sufficient, it is convenient for gas absorption, but the voltage drop during discharge becomes somewhat large. If the water repellent treatment is insufficient, the opposite will occur.
発明が解決しようとする問題点
このように、導電性層の形成にしても、撥水処理にして
も、十分性なうと急速充電には効果があるが、これらの
処理は、カドミウム極での、とくにイオン伝導性に抵抗
になるので、放電性能がやや劣化する。Problems to be Solved by the Invention As described above, both the formation of a conductive layer and water-repellent treatment are effective for rapid charging if they are sufficient, but these treatments are difficult to achieve with cadmium electrodes. , especially since it becomes resistant to ionic conductivity, causing a slight deterioration in discharge performance.
本発明はこのような、急速充電特性と放電性能の向上を
バランスよく行なうことを目的とする。An object of the present invention is to improve the rapid charging characteristics and the discharging performance in a well-balanced manner.
問題点を解決するための手段
本発明は急速充電を可能にし、同時に放電時での電圧低
下の少ないカドミウム極を提供するものである。Means for Solving the Problems The present invention provides a cadmium electrode that allows rapid charging and at the same time reduces voltage drop during discharge.
すなわち、カドミウム極を製造後に、フッソ樹脂により
撥水処理を施し、ついで導電性の層を設ける。または、
逆に、導電性の層を設けて後にフッソ樹脂による撥水処
理を施したものである。That is, after producing the cadmium electrode, it is treated with water repellent using fluorocarbon resin, and then a conductive layer is provided. or
Conversely, a conductive layer is provided and then water repellent treatment is performed using fluorocarbon resin.
作 用
このように両手段を併用することによシ、各々単独の工
程では得られなかった急速充電特性と放電特性とが得ら
れる。Function: By using both methods in combination in this manner, rapid charging characteristics and discharging characteristics that could not be obtained by each process alone can be obtained.
なお、フッソ樹脂による処理としては、電極を製造した
後に、フッソ樹脂系のディスパージョンに浸せきし、乾
燥する工程が最も工業的に有利であるＯ
また、導電性の層については、銅、ニッケル。As for the treatment with fluorocarbon resin, the process of immersing the electrode in a fluorocarbon resin dispersion and drying it after manufacturing the electrode is the most industrially advantageous.
炭素などの粉末と結着剤とを塗着、金属の場合はスパッ
タリング、蒸着などの手段がある。しかし、工業的には
メッキが容易であり、電解および無電解メッキが採用で
きる。There are methods such as applying powder such as carbon and a binder, and in the case of metal, sputtering and vapor deposition. However, plating is easy from an industrial perspective, and electrolytic and electroless plating can be employed.
メッキの金属としては、耐アルカリ性があればとくに制
限はない。一般的には、無電解メッキが容易な銅、ニッ
ケルなどがよく、ニッケルの場合は、カドミウム極に直
接液すると自己放電が増すので、銅メツキ上にほどこす
ことが好ましい。酸化カドミウムを出発材料にしたカド
ミウム極では、ニッケルの無電解メッキはや＼困難であ
るので、多孔性の銅メッキ層を設けた後に、ニッケルの
電解メッキを行なうのがよい。There are no particular restrictions on the metal for plating as long as it has alkali resistance. In general, copper, nickel, etc., which can be easily plated electrolessly, are preferred. In the case of nickel, self-discharge will increase if it is applied directly to the cadmium electrode, so it is preferable to apply it on copper plating. Since electroless plating of nickel is somewhat difficult with a cadmium electrode made from cadmium oxide as a starting material, it is preferable to electrolytically plate nickel after providing a porous copper plating layer.
以下酸化カドミウムを出発材料として用いたペースト式
カドミウム極を例にして実施例として詳述する。A paste-type cadmium electrode using cadmium oxide as a starting material will be described below in detail as an example.
実施例
市販の酸化カドミウムをポリビニルアルコールｔｖ３ｓ
＜ｘ量＞のエチレングリコール溶液９重量比で５％のポ
リエチレン微粉末、同じ（ｏ、ｅｓ％の塩化ビニル−ア
クリロントリル短繊維などを加えてペーストをつくる。Example Commercially available cadmium oxide was mixed with polyvinyl alcohol tv3s
A paste is made by adding 5% polyethylene fine powder, the same (o, es%) vinyl chloride-acrylontrile short fibers, etc. to <x amount> of 9% ethylene glycol solution by weight.
これを厚さＱ、１５ ａｒｍ 、孔径１．８■、開孔度
５０％の鉄製でニッケルメッキを施したパンチングメタ
ル板に塗着する。スリットを通して平滑化し、厚さを０
．６ｍｇに調製する。その後、１２０℃で２時間乾燥し
てペースト式カドミウム極を得る。This was applied to a nickel-plated punched metal plate made of iron and having a thickness of Q, 15 arm, a hole diameter of 1.8 cm, and a porosity of 50%. Smooth through the slit and reduce the thickness to 0
．． Adjust to 6 mg. Thereafter, it is dried at 120° C. for 2 hours to obtain a paste-type cadmium electrode.
ついでこの極を１４０ｍＡ／−の電流密度９時間１０分
、電解浴、比重１．１６の苛性カリ水溶液。This electrode was then heated in an electrolytic bath at a current density of 140 mA/- for 9 hours and 10 minutes, and a caustic potassium aqueous solution with a specific gravity of 1.16.
温度２６℃の条件で対極にニッケル板を用いて充電する
。この充電量は、計算の上では、全体のカドミウム理論
容量の約３６〜４０チに相当するが、充電効率が低いの
で、実際には約２０％が充電されたとみてよい。Charging is performed using a nickel plate as a counter electrode at a temperature of 26°C. This amount of charge corresponds to about 36 to 40 cm of the entire theoretical cadmium capacity, but since the charging efficiency is low, it can be assumed that about 20% was actually charged.
ついで、このようにして得られたカドミウム極に、銅の
無電解メッキを行なった。Next, the cadmium electrode thus obtained was electrolessly plated with copper.
まず、市販のアクチベータ液を５倍に希釈した水溶液中
に、２分間浸せきした。乾燥後に、同じく市販の無電解
銅メッキ浴を用い、これを６倍に希釈して、４５℃２０
分間浸せきした。なお、この処理による重量増加は、約
１俤であった。First, it was immersed for 2 minutes in an aqueous solution in which a commercially available activator solution was diluted 5 times. After drying, use the same commercially available electroless copper plating bath, dilute it 6 times, and heat it at 45℃20.
Soaked for a minute. Note that the weight increase due to this treatment was approximately 1 yen.
水洗、乾燥後に、市販のフッソ樹脂ディスパージョンを
２チ水溶液に希釈し、この溶液中に、前記カドミウム極
を常温で２分間浸せきし、ついで１２０℃で１．５時間
乾燥した。この処理によシミ極面は撥水性が生じた。な
お、この撥水性処理は、導電性の層を設ける前に行なっ
てもよい。このようにして得られたカドミウム極を用い
て電池に組込んだ。After washing with water and drying, a commercially available fluororesin dispersion was diluted to a 2-h water solution, the cadmium electrode was immersed in this solution for 2 minutes at room temperature, and then dried at 120° C. for 1.5 hours. This treatment made the stain electrode surface water repellent. Note that this water repellent treatment may be performed before providing the conductive layer. The cadmium electrode thus obtained was incorporated into a battery.
電池としては、単２形の密閉形ニッケルーカドミウム蓄
電池を例にした。したがって、このようにして得られた
カドミウム極を幅３．９ｍ、長さ２６側に裁断し、リー
ド板を所定の２ケ所にスポット溶接によシ取シ付けた。As an example of a battery, a AA sealed nickel-cadmium storage battery was used. Therefore, the cadmium electrode thus obtained was cut into pieces with a width of 3.9 m and a length of 26, and lead plates were attached at two predetermined locations by spot welding.
相手極としては、公知の焼結式ニッケル極をえらび、同
じく幅３−９Ｃｍ を長さ２２ｆｆｉとして用いた。こ
の場合もリード板を２ケ所取シ付けた。As the counter electrode, a known sintered nickel electrode was selected, with a width of 3-9 cm and a length of 22ffi. In this case as well, lead plates were attached at two locations.
セパレータとしては、ポリアミド不織布、電解液として
は、比重１．２０の苛性カリ水溶液に水酸化リチウムを
２０１／ｌ溶解して用いた。公称容量は２．３２Ａｈで
ある。この電池をＡとする。A polyamide nonwoven fabric was used as the separator, and 201/l of lithium hydroxide was dissolved in a caustic potassium aqueous solution having a specific gravity of 1.20 as the electrolyte. The nominal capacity is 2.32Ah. This battery is called A.
つぎに比較のために、フッソ樹脂による処理を行なわず
に、カドミウム極全面にＡと同じ量の銅メッキを施した
電池をＢ１．同じく２倍のメッキを施した電池をＢ２と
して加えた。またＡと同じ２％のフッソ樹脂のみの処理
を行なった電池を０１゜また、４チで処理した電極を用
いた電池を０２として加えた。Next, for comparison, a battery B1 was prepared in which the same amount of copper plating as in A was applied to the entire surface of the cadmium electrode without treatment with fluorocarbon resin. A battery with the same double plating was added as B2. In addition, a battery treated with only 2% fluorocarbon resin as in A was added as 01°, and a battery using electrodes treated with 4-chi was added as 02.
これら電池の通常の充放電たとえば、０．２０充電−０
，２０放電では、いずれも２．３０〜２，３２Ａ）１の
範囲であり、放電特性に差はなかった。Normal charging and discharging of these batteries, e.g. 0.20 charge-0
, 20 discharge, all ranged from 2.30 to 2.32A)1, and there was no difference in discharge characteristics.
そこで、各電池の急速充電特性を調べた。周囲温度を０
″Ｃとし、各充電率で充電した際の電池内の圧力の変化
を測定した。なお、充電量は、放電量の１．３倍とした
。また、内圧は最高値で示した。Therefore, we investigated the quick charging characteristics of each battery. ambient temperature to 0
"C", and the change in pressure inside the battery was measured when charging at each charging rate.The amount of charge was 1.3 times the amount of discharge.In addition, the internal pressure was shown as the highest value.
その結果を表１に示す。The results are shown in Table 1.
表１．各充電率で充電した際の電池内圧（単位はＫＪｄ
）この結果から、Ａは、Ｂ２とはソ等しく、その他の電
池は、かなり劣る。Table 1. Battery internal pressure when charged at each charging rate (unit: KJd)
) From this result, A is equivalent to B2, and the other batteries are considerably inferior.
つぎに放電電圧を比較した。周囲温度を１０°Ｃとし、
６Ｃの放電を行なった。その結果、電池への平坦電圧は
１，１ｏＶ、電池Ｂ１は１．１１ｖ、電池Ｂ２は１．ｏ
ｓＶ、電池Ｃ１は１．１２Ｖ 、電池Ｃ２は１．０９Ｖ
であった・
すなわち、電池Ａでは、急速充電での内圧の上昇が少な
く、また、高率放電での電圧の低下も少ない。このよう
な電池は、比較のなかには無く、内圧の点ですぐれてい
たＢ２はかなり大きく電圧が低下した。Next, we compared the discharge voltages. The ambient temperature is 10°C,
A discharge of 6C was performed. As a result, the flat voltage to the battery is 1.1oV, battery B1 is 1.11v, battery B2 is 1.1oV. o
sV, battery C1 is 1.12V, battery C2 is 1.09V
In other words, in battery A, the increase in internal pressure during rapid charging was small, and the voltage drop during high rate discharging was also small. There was no such battery in the comparison, and B2, which was superior in terms of internal pressure, had a considerably large voltage drop.
すなわち、フッソ樹脂による撥水層の形成と導電性の層
の形成によシ、各々単独では得られない急速充電特性と
放電特性が得られた。That is, by forming the water-repellent layer and the conductive layer using fluorocarbon resin, rapid charging characteristics and discharging characteristics that could not be obtained by each alone were obtained.
発明の効果
このようにアルカリ電池用カドミウム極に、導電性の層
と撥水層を設けることにより、急速充電を一層可能にし
、同時に放電時の放電電圧を良好に保つ効果を発揮する
。Effects of the Invention As described above, by providing a conductive layer and a water-repellent layer on a cadmium electrode for an alkaline battery, rapid charging is further enabled, and at the same time, the effect of maintaining a good discharge voltage during discharging is exhibited.
Claims (2)
撥水層で被覆されていることを特徴とするアルカリ電池
用カドミウム電極。(1) A cadmium electrode for an alkaline battery, characterized in that the cadmium electrode is covered with a conductive layer and a water-repellent layer made of fluorocarbon resin.
ある特許請求の範囲第１項記載のアルカリ電池用カドミ
ウム電極。(2) The cadmium electrode for an alkaline battery according to claim 1, wherein the conductive layer is made of copper, nickel, or carbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61213231A JPS6369142A (en) | 1986-09-10 | 1986-09-10 | Cadmium electrode for alkaline battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61213231A JPS6369142A (en) | 1986-09-10 | 1986-09-10 | Cadmium electrode for alkaline battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6369142A true JPS6369142A (en) | 1988-03-29 |
Family
ID=16635702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61213231A Pending JPS6369142A (en) | 1986-09-10 | 1986-09-10 | Cadmium electrode for alkaline battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6369142A (en) |
-
1986
- 1986-09-10 JP JP61213231A patent/JPS6369142A/en active Pending
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