JPH0680589B2 - Paste type cadmium electrode - Google Patents

Paste type cadmium electrode

Info

Publication number
JPH0680589B2
JPH0680589B2 JP60277153A JP27715385A JPH0680589B2 JP H0680589 B2 JPH0680589 B2 JP H0680589B2 JP 60277153 A JP60277153 A JP 60277153A JP 27715385 A JP27715385 A JP 27715385A JP H0680589 B2 JPH0680589 B2 JP H0680589B2
Authority
JP
Japan
Prior art keywords
paste
active material
cadmium
core material
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.)
Expired - Lifetime
Application number
JP60277153A
Other languages
Japanese (ja)
Other versions
JPS62136767A (en
Inventor
憲男 鈴木
健太郎 湯浅
誠一 岡本
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP60277153A priority Critical patent/JPH0680589B2/en
Publication of JPS62136767A publication Critical patent/JPS62136767A/en
Publication of JPH0680589B2 publication Critical patent/JPH0680589B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/665—Composites
    • H01M4/667—Composites in the form of layers, e.g. coatings
    • 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
    • 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
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H01M4/72—Grids
    • H01M4/74—Meshes or woven material; Expanded metal
    • 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
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H01M4/72—Grids
    • H01M4/74—Meshes or woven material; Expanded metal
    • H01M4/742—Meshes or woven material; Expanded metal perforated material
    • 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
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/027—Negative electrodes
    • 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
    • H01M4/04—Processes of manufacture in general
    • H01M4/049—Manufacturing of an active layer by chemical means
    • 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
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/669—Steels
    • 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
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H01M4/80—Porous plates, e.g. sintered carriers
    • 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)
  • Composite Materials (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Cell Electrode Carriers And Collectors (AREA)

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、ニッケル・カドミウム電池（以下ニカド電池
と略称する）用負極、とくにペースト式カドミウム電極
に関するものである。TECHNICAL FIELD The present invention relates to a negative electrode for a nickel-cadmium battery (hereinafter abbreviated as a nicad battery), and more particularly to a paste-type cadmium electrode.

従来の技術 従来のニカド電池用ペースト式負極は、カドミウムを主
活物質とし、これに電気電導性を高めるための導電材と
してニッケル粉末を、極板の強度を増すために合成樹脂
の単繊維を、さらに結着剤としてポリビニルアルコール
の溶液をそれぞれ加えて、所定の粘度に達するまで混練
し、ペースト状合剤としたものを、第３図に示す主体を
なす開孔部１と帯状の非開孔部２とを設けた多孔鋼板に
ニッケルメッキを施した芯材３に塗着し、乾燥後一定の
厚みに加圧して未化成板としていた。さらにこの未化成
板を、たとえば水酸化カリウム水溶液中で電解（化成）
し、その後水洗，乾燥，プレス切断の各工程を施し、第
４図に示すような負極板４としていた。なお、第４図中
ａは集電部、ｂはペースト塗着部である。2. Description of the Related Art Conventional paste type negative electrodes for Ni-Cd batteries use cadmium as the main active material, nickel powder as a conductive material to enhance electric conductivity, and synthetic resin monofilament to increase the strength of the electrode plate. Further, a solution of polyvinyl alcohol was further added as a binder, and the mixture was kneaded until a predetermined viscosity was reached to form a paste-like mixture. The paste-like mixture shown in FIG. A perforated steel plate provided with holes 2 was applied to a nickel-plated core material 3, dried and then pressed to a certain thickness to give an unformed plate. Further, this unformed plate is electrolyzed (formed) in, for example, an aqueous solution of potassium hydroxide.
After that, each step of washing with water, drying and press cutting was performed to obtain a negative electrode plate 4 as shown in FIG. In FIG. 4, a is a current collector and b is a paste coating part.

発明が解決しようとする問題点 しかしこのようなペースト式負極板はカドミウム合剤
（以下活物質と略称する）と芯材非開孔部２との結着力
が弱いため、電池構成上、極板群捲回時や、落下，振動
等の機械的衝撃に対し、非開孔部上の活物質な脱落し易
い状態である。この活物質の脱落現象は、非開孔部２と
開孔部１との境界部分においても同様に生じ、この部分
からの脱落物質が主に電池での内部短絡を生じる原因と
なって、電池の電圧不良あるいは、寿命特性の低下を招
いていた。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, such a paste-type negative electrode plate has a weak binding force between the cadmium mixture (hereinafter abbreviated as an active material) and the core material non-opening portion 2, and therefore the electrode plate has a battery structure. It is in a state where the active material on the non-opened portion easily falls off due to mechanical impact such as group winding, dropping, and vibration. The dropping phenomenon of the active material also occurs at the boundary portion between the non-opening portion 2 and the opening portion 1, and the dropping material from this portion mainly causes an internal short circuit in the battery. Voltage failure or deterioration of life characteristics.

本発明は、前記従来例におけるペースト式カドミウム電
極の活物質脱落を良好に防止し、ニカド電池の電圧不良
や寿命特性の低下を解消することを目的としたものであ
る。An object of the present invention is to satisfactorily prevent the paste type cadmium electrode in the above-mentioned conventional example from dropping out of the active material and to eliminate the voltage failure and the deterioration of the life characteristic of the nicad battery.

問題点を解決するための手段 本発明は前記目的を達成するため、孔径1.0〜3.0mm、開
孔率40〜60％の金属芯材にペースト状活物質を塗着した
電極において、帯状に露出する非開孔部と、これに隣接
する開孔部の２個の単孔間に、この単孔より小さい少な
くとも１個の穴を有する芯材を使用することを特徴とす
るペースト式カドミウム電極を提供するものである。Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides an electrode in which a paste-like active material is applied to a metal core material having a pore diameter of 1.0 to 3.0 mm and a porosity of 40 to 60%, and exposed in a strip shape. A paste-type cadmium electrode, characterized in that a core material having at least one hole smaller than the single hole is used between the two single holes of the non-open hole portion and the adjacent open hole portion. It is provided.

作用 このように構成することでペースト状活物質の塗着強度
が増し非開孔部と開孔部との境界面でのペースト状活物
質の脱落を防止することができる。Action With such a configuration, the coating strength of the paste-like active material is increased, and the paste-like active material can be prevented from falling off at the boundary surface between the non-opened portion and the open portion.

実施例 以下、本発明の詳細を実施例により説明する。Examples Hereinafter, details of the present invention will be described with reference to examples.

まず、カドミウム主体のペースト状活物質を次の組成で
調整する。First, a cadmium-based paste-like active material is prepared with the following composition.

酸化カドミウム（CdO） ……73重量部 ニッケル粉末 ……10重量部 合成樹脂単繊維 …… 1重量部 ポリビニルアルコール …… 1重量部 エチレングリコール …… 1重量部 この組成で、所定の粘度に達するまで充分に混練したペ
ースト状活物質を、孔径1.0〜3.0mm、開孔率40〜60％の
多孔性鋼板にニッケルメッキした芯材３に塗着する。こ
の場合集電部となる芯材の非開孔部２は、ペースト塗着
スリットを通過する際、ペースト状活物質が付着しない
ように、硬質ゴム等によって、この部分のペースト状活
物質をこき取る。第１図は、このペースト塗着後のカド
ミウム電極５を示し、ａは集電部、ｂは活物質塗着部で
ある。Cadmium oxide (CdO) …… 73 parts by weight Nickel powder …… 10 parts by weight Synthetic resin monofilament …… 1 part by weight Polyvinyl alcohol …… 1 part by weight Ethylene glycol …… 1 part by weight Until the specified viscosity is reached with this composition A sufficiently kneaded paste-like active material is applied to a nickel-plated core material 3 on a porous steel plate having a pore size of 1.0 to 3.0 mm and a porosity of 40 to 60%. In this case, the non-open hole portion 2 of the core material serving as the current collecting portion is made of hard rubber or the like so that the paste-like active material is not adhered to the paste-like active material when passing through the paste coating slit. take. FIG. 1 shows the cadmium electrode 5 after the paste coating, where a is a current collecting portion and b is an active material coating portion.

本発明では、非開孔部２と隣接した開孔部１列目の２個
の単孔1a間に、第２図のc,d,eに示すように単孔1aの直
径の約1/2の直径を持つ穴を設けた金属芯材を用いて、
ペースト状活物質を塗着した。このあと乾燥し、ローラ
ープレスにより0.5〜0.7mmの厚みに加圧して未化成板と
する。これを濃度約20重量％の水酸化カリウム水溶液中
で電解（化成）し、その後従来同様水洗，乾燥，プレス
の各工程を経て負極板とする。In the present invention, between the two single holes 1a in the first row of the open holes adjacent to the non-open hole portion 2, as shown in c, d, e of FIG. Using a metal core material with a hole with a diameter of 2,
The pasty active material was applied. Then, it is dried and pressed to a thickness of 0.5 to 0.7 mm by a roller press to obtain an unformed plate. This is electrolyzed (formation) in an aqueous solution of potassium hydroxide having a concentration of about 20% by weight, and thereafter, the steps of washing with water, drying, and pressing are carried out in the same manner as in the prior art to form a negative electrode plate.

上記により得られたカドミウム負極板を、ニッケル正極
板、帯状セパレータと共に用いて組立られたニカド電池
の電圧不良率（工程不良）は、従来品が約0.1％であっ
たのに比べ本発明品は約0.02％と従来品の約1/5に大幅
に減少した。The cadmium negative electrode plate obtained by the above, a nickel positive electrode plate, the voltage defect rate of the Ni-Cd battery assembled using a strip separator (process defect), compared to the conventional product was about 0.1%, the present invention product It was about 0.02%, about 1/5 of the conventional product.

これは、本発明によるカドミウム負極の芯材非開孔部
と、これに隣接する開孔部との境界部分において、開孔
部の単孔間にそれよりも小さな孔を設けることにより、
開孔部単孔間に存在する活物質の芯材に対する密着なら
びにからみつきをよくすることにより電池内での内部短
絡が減少したためと思われる。This is, in the boundary portion of the core material non-opening portion of the cadmium negative electrode according to the present invention and the opening portion adjacent thereto, by providing a smaller hole between the single holes of the opening portion,
It is considered that the internal short circuit in the battery was reduced by improving the adhesion and the entanglement of the active material existing between the single pores of the open part to the core material.

発明の効果 以上のように、本発明のカドミウム電極は芯材非開孔部
と、これに隣接する開孔部の２個の単孔間に単孔よりも
小さい穴をもうけることにより、活物質の脱落を防止
し、工程における電池の電圧不良を減少することができ
た。EFFECTS OF THE INVENTION As described above, the cadmium electrode of the present invention has a core material non-opening portion and an active material by forming a hole smaller than a single hole between two single holes in the opening portion adjacent to the core material. It was possible to prevent the battery from falling off and reduce the voltage defect of the battery in the process.

【図面の簡単な説明】[Brief description of drawings]

第１図は本発明の実施例におけるカドミウム電極を示す
図、第２図は第１図の一部を拡大して示した図、第３図
は従来のニッケル・カドミウム蓄電池用電極芯材を示す
平面図、第４図は同芯材にペースト状活物質を塗着した
従来のカドミウム電極を示す図である。 １……開孔部、1a……非開孔部に隣接した開孔部の単
孔、２……非開孔部、３……芯材、4,5……負極板。FIG. 1 is a diagram showing a cadmium electrode in an embodiment of the present invention, FIG. 2 is an enlarged view of a part of FIG. 1, and FIG. 3 is a conventional electrode core material for nickel-cadmium storage batteries. FIG. 4 is a plan view showing a conventional cadmium electrode in which a paste-like active material is applied to a core material. 1 ... Open hole, 1a ... Single hole of open hole adjacent to non-open hole, 2 ... Non-open hole, 3 ... Core material, 4, 5 ... Negative electrode plate.

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】カドミウムを主活物質とするペースト状合
剤を、孔径1.0〜3.0mm,開孔率40〜60％の金属芯材に塗
着してなる電極であって、帯状に露出する非開孔部とこ
れに隣接する開孔部の２個の単孔間に、この単孔よりも
小さい少なくとも１個の穴を有した芯材を使用する事を
特徴とするペースト式カドミウム電極。1. An electrode formed by applying a paste-like mixture containing cadmium as a main active material to a metal core material having a pore diameter of 1.0 to 3.0 mm and a porosity of 40 to 60%, which is exposed in a strip shape. A paste-type cadmium electrode, characterized in that a core material having at least one hole smaller than the single hole is used between the two single holes of the non-opened portion and the open portion adjacent thereto.
JP60277153A 1985-12-10 1985-12-10 Paste type cadmium electrode Expired - Lifetime JPH0680589B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60277153A JPH0680589B2 (en) 1985-12-10 1985-12-10 Paste type cadmium electrode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60277153A JPH0680589B2 (en) 1985-12-10 1985-12-10 Paste type cadmium electrode

Publications (2)

Publication Number Publication Date
JPS62136767A JPS62136767A (en) 1987-06-19
JPH0680589B2 true JPH0680589B2 (en) 1994-10-12

Family

ID=17579536

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60277153A Expired - Lifetime JPH0680589B2 (en) 1985-12-10 1985-12-10 Paste type cadmium electrode

Country Status (1)

Country Link
JP (1) JPH0680589B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960043320A (en) * 1995-05-31 1996-12-23 윤종용 Method for manufacturing current collector for secondary battery and pole plate
EP0840387B1 (en) * 1996-10-21 2003-03-19 Japan Storage Battery Company Limited Method for manufacturing a battery electrode

Also Published As

Publication number Publication date
JPS62136767A (en) 1987-06-19

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