JPH05121074A - Nickel electrode for alkaline storage battery - Google Patents
Nickel electrode for alkaline storage batteryInfo
- Publication number
- JPH05121074A JPH05121074A JP3309960A JP30996091A JPH05121074A JP H05121074 A JPH05121074 A JP H05121074A JP 3309960 A JP3309960 A JP 3309960A JP 30996091 A JP30996091 A JP 30996091A JP H05121074 A JPH05121074 A JP H05121074A
- Authority
- JP
- Japan
- Prior art keywords
- nickel hydroxide
- nickel
- storage battery
- electrode
- alkaline storage
- 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
-
- 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
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はアルカリ蓄電池用ニッケ
ル極に関するものである。FIELD OF THE INVENTION The present invention relates to a nickel electrode for an alkaline storage battery.
【０００２】[0002]
【従来の技術】現在、活物質である水酸化ニッケル粉末
を直接充填することによってニッケル極を得る方法とし
ては、水酸化ニッケル粉末をペースト状にしてニッケル
多孔性基板に充填するペースト式電極と活物質粉末を集
電体で包み込むボタン型およびポケット型電極が存在す
る。また、ペースト式電極の集電体である多孔質耐アル
カリ性金属基板が比較的高価であることから、芯金を集
電体とするニッケル電極の開発も行なわれつつある。こ
れら電極は、軽量小型化が急速に進行しているポータブ
ルエレクトロニクス機器のニーズに対応するために、高
エネルギー密度化が要求されているが、充填できる体積
には限界があることから、水酸化ニッケル粉末そのもの
を高密度化する必要があった。そこで、内部細孔容積を
０．１ｍｌ／ｇ以下に規制した高密度ニッケル粉末が開
発・使用されているが、この粉末は生産過程上球状を呈
する特徴を有していた。そのため、充填された際に粒子
間に隙間を生じることとなり、高エネルギー密度化の点
でマイナス要因であった。2. Description of the Related Art Currently, as a method of directly filling a nickel hydroxide powder, which is an active material, to obtain a nickel electrode, a paste type electrode in which nickel hydroxide powder is made into a paste and filled into a nickel porous substrate and an active material are used. There are button-type and pocket-type electrodes that wrap the material powder in a current collector. Further, since a porous alkali-resistant metal substrate, which is a collector of a paste-type electrode, is relatively expensive, a nickel electrode using a core metal as a collector is being developed. These electrodes are required to have high energy density in order to meet the needs of portable electronic devices whose weight and size are rapidly progressing. However, since the volume that can be filled is limited, nickel hydroxide is required. It was necessary to densify the powder itself. Therefore, a high-density nickel powder having an internal pore volume regulated to 0.1 ml / g or less has been developed and used, but this powder had a characteristic of exhibiting a spherical shape in the production process. Therefore, a gap is generated between the particles when they are filled, which is a negative factor in increasing the energy density.
【０００３】[0003]
【発明が解決しようとする課題】本発明が解決しようと
する問題点は、内部細孔容積が０．１ｍｌ／ｇ以下の球
状水酸化ニッケル粒子を活物質とするニッケル電極が有
する上記欠点、即ち球状粒子間に生じる隙間を減少さ
せ、より高密度に充填させようとするものである。The problem to be solved by the present invention is that the above-mentioned drawbacks of the nickel electrode using spherical nickel hydroxide particles having an internal pore volume of 0.1 ml / g or less as an active material are as follows. It is intended to reduce the gaps generated between the spherical particles and to fill the particles with higher density.
【０００４】[0004]
【課題を解決するための手段】本発明は、水酸化ニッケ
ルを活物質とするアルカリ蓄電池用ニッケル電極におい
て、内部細孔容積が０．１ｍｌ／ｇ以下、直径が２０〜
４０μｍの球状水酸化ニッケル粒子を粉砕した後に、電
池用活物質とすることを特徴とするアルカリ蓄電池用ニ
ッケル極である。また、粉砕した水酸化ニッケル粉末と
球状水酸化ニッケル粉末を混合して用いることを特徴と
するアルカリ蓄電池用ニッケル極である。The present invention provides a nickel electrode for an alkaline storage battery using nickel hydroxide as an active material, which has an internal pore volume of 0.1 ml / g or less and a diameter of 20 to 20.
It is a nickel electrode for an alkaline storage battery, characterized by crushing spherical nickel hydroxide particles of 40 μm and using it as an active material for a battery. Further, it is a nickel electrode for an alkaline storage battery, characterized by using a mixture of crushed nickel hydroxide powder and spherical nickel hydroxide powder.
【０００５】[0005]
【作 用】内部細孔容積が０．１ｍｌ／ｇ以下である高
密度化された水酸化ニッケル粒子は、図１に示す如く、
その生産過程上球状を呈するようになる。このため、こ
の水酸化ニッケル粒子を活物質として使用した場合、充
填された球状粒子間に隙間を生じることになり、高密度
化された水酸化ニッケル粒子の利点を十分に活用するこ
とができなかった。この隙間を削除するには元の球状粒
子よりも更に小さい粉末を混合する方法が考えられる。
本発明では、図２に示すように、この高密度球状水酸化
ニッケル粒子を粉砕した粉末を用いることによりこの隙
間を効率良く削除し、高エネルギー密度なニッケル電極
を得ることができる。[Operation] Densified nickel hydroxide particles with an internal pore volume of 0.1 ml / g or less, as shown in FIG.
It becomes spherical in the production process. Therefore, when the nickel hydroxide particles are used as an active material, gaps are formed between the filled spherical particles, and the advantages of the densified nickel hydroxide particles cannot be fully utilized. It was In order to remove this gap, a method of mixing a powder smaller than the original spherical particles can be considered.
In the present invention, as shown in FIG. 2, by using a powder obtained by pulverizing the high-density spherical nickel hydroxide particles, this gap can be efficiently removed and a nickel electrode with high energy density can be obtained.
【０００６】[0006]
【実施例】以下、本発明の一実施例を説明する。内部細
孔容積が０．１ｍｌ／ｇ以下である直径２０〜４０μｍ
の球状水酸化ニッケル粒子の見かけ密度は１．８〜２．
１ｇ／cm3 の範囲にある。これを直径４〜８μｍに粉砕
した後に、再び測定したところ見かけ密度は２．１〜
２．５ｇ／cm3 に増加していた。この水酸化ニッケル粉
末をＡ，粉砕前の水酸化ニッケル粉末をＢ．もともと直
径が４〜８μｍの範囲にある球状水酸化ニッケル粉末を
Ｃとする。これらの水酸化ニッケル粉末９０wt％に一酸
化コバルト粉末２．０wt％とグラファイト粉末８．０wt
％を混合し活物質とした。これら活物質にポリテトラフ
ルオロエチレン３wt％を結着剤として加え、シート状に
加工した。これら活物質シートをニッケルメッシュ基板
に圧着させ、乾燥・プレス後厚み０．７ｍｍのニッケル
電極とした。これらのニッケル電極に対極としてペース
ト式カドミウム電極を組み合わせて、比重１．２６の水
酸化カリウム水溶液を注液し、流動する電解液を有する
電池を試作した。EXAMPLE An example of the present invention will be described below. Diameter 20-40 μm with internal pore volume of 0.1 ml / g or less
The apparent density of the spherical nickel hydroxide particles is 1.8-2.
It is in the range of 1 g / cm 3 . This was crushed to a diameter of 4 to 8 μm and then measured again, and the apparent density was 2.1 to
It increased to 2.5 g / cm 3 . This nickel hydroxide powder is A, and the nickel hydroxide powder before crushing is B.I. Let C be a spherical nickel hydroxide powder that originally has a diameter in the range of 4 to 8 μm. 90% by weight of nickel hydroxide powder, 2.0% by weight of cobalt monoxide powder and 8.0% by weight of graphite powder.
% To make an active material. Polytetrafluoroethylene (3 wt%) was added to these active materials as a binder, and processed into a sheet. These active material sheets were pressed onto a nickel mesh substrate, dried and pressed to obtain a nickel electrode having a thickness of 0.7 mm. A paste type cadmium electrode as a counter electrode was combined with these nickel electrodes, and a potassium hydroxide aqueous solution having a specific gravity of 1.26 was injected to prepare a prototype battery having a flowing electrolytic solution.
【０００７】これらの電池を２４時間放置し、一酸化コ
バルトを溶解再析出させた後、温度２０℃において充電
０．１ＣＡで１５時間、放電０．２ＣＡ（終止電圧１．
００Ｖ）を１０サイクル繰り返し試験した。その後引き
続き、放電１．０ＣＡ（終止電圧１．００Ｖ），２．０
ＣＡ（終止電圧０．９０Ｖ），３．０ＣＡ（終止電圧
１．００Ｖ）についても１０サイクル繰り返し試験し
た。表１に放電０．２ＣＡにおける電池の放電容量を、
表２に高率放電による活物質利用率の変化を示す。After leaving these batteries for 24 hours to dissolve and re-precipitate cobalt monoxide, the charge was 0.1 CA for 15 hours at a temperature of 20 ° C. and the discharge was 0.2 CA (the final voltage was 1.
00V) was repeatedly tested for 10 cycles. After that, discharge 1.0 CA (final voltage 1.00 V), 2.0
CA (final voltage 0.90 V) and 3.0 CA (final voltage 1.00 V) were also repeatedly tested for 10 cycles. Table 1 shows the discharge capacity of the battery at a discharge of 0.2 CA,
Table 2 shows changes in the utilization rate of the active material due to high rate discharge.
【０００８】 [0008]
【０００９】 [0009]
【００１０】このように、球状を粉砕した水酸化ニッケ
ル粒子を活物質に用いることにより、活物質充填量を増
加させ、単位体積当たりの放電容量を高めることが可能
である。また、粉砕による、高率放電特性の劣化も認め
られない。尚、上記実施例において、添加剤として一酸
化コバルトを用いたが、α−Ｃｏ（ＯＨ）2 、β−Ｃｏ
（ＯＨ）2 を用いても類似の傾向を示した。又、金属コ
バルト粉末を用いた場合にも、その効果は二価コバルト
化合物粉末の場合に比べ小さいが類似の傾向が観察され
た。また、本発明は、内部細孔容積が０．１ｍｌ／ｇ以
下である高密度化された水酸化ニッケル粒子を使用する
全ての電極において同様の効果を有する。As described above, by using spherically crushed nickel hydroxide particles as the active material, it is possible to increase the active material filling amount and increase the discharge capacity per unit volume. In addition, deterioration of high rate discharge characteristics due to crushing is not observed. Although cobalt monoxide was used as an additive in the above-mentioned examples, α-Co (OH) 2 , β-Co
Using (OH) 2 showed a similar tendency. Further, when the metallic cobalt powder was used, the effect was smaller than that of the divalent cobalt compound powder, but a similar tendency was observed. Further, the present invention has a similar effect in all electrodes using densified nickel hydroxide particles having an internal pore volume of 0.1 ml / g or less.
【００１１】[0011]
【発明の効果】上述した如く、本発明は水酸化ニッケル
を活物質とするアルカリ蓄電池用ニッケル電極におい
て、内部細孔容積が０．１ｍｌ／ｇ以下，直径が２０〜
４０μｍの球状水酸化ニッケル粒子を粉砕した後に、電
池用活物質とすることにより、高性能で高容量なアルカ
リ蓄電池用ニッケル極とこれを用いたアルカリ蓄電池を
提供することができるので、その工業的価値は極めて大
である。As described above, the present invention provides a nickel electrode for an alkaline storage battery using nickel hydroxide as an active material, which has an internal pore volume of 0.1 ml / g or less and a diameter of 20 to 20.
By crushing spherical nickel hydroxide particles of 40 μm and using it as a battery active material, it is possible to provide a high-performance and high-capacity nickel electrode for an alkaline storage battery and an alkaline storage battery using the same. The value is extremely large.
【図１】均一な粒子径の球状水酸化ニッケルを充填した
状態の模式図である。FIG. 1 is a schematic view of a state in which spherical nickel hydroxide having a uniform particle diameter is filled.
【図２】球状水酸化ニッケルを粉砕して充填した状態の
模式図である。FIG. 2 is a schematic view showing a state in which spherical nickel hydroxide is crushed and filled.
Claims (2)
蓄電池用ニッケル電極において、内部細孔容積が０．１
ｍｌ／ｇ以下、直径が２０〜４０μｍの球状水酸化ニッ
ケル粒子を粉砕し、電池用活物質に用いることを特徴と
するアルカリ蓄電池用ニッケル極。1. A nickel electrode for an alkaline storage battery, which uses nickel hydroxide as an active material, has an internal pore volume of 0.1.
A nickel electrode for an alkaline storage battery, characterized by pulverizing spherical nickel hydroxide particles having a diameter of 20 to 40 μm at a volume of not more than ml / g and using them as an active material for a battery.
状水酸化ニッケル粉末を混合して用いることを特徴とす
るアルカリ蓄電池用ニッケル極。2. A nickel electrode for an alkaline storage battery, wherein the crushed nickel hydroxide powder and spherical nickel hydroxide powder are mixed and used.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3309960A JPH05121074A (en) | 1991-10-28 | 1991-10-28 | Nickel electrode for alkaline storage battery |
| EP92911246A EP0544011B1 (en) | 1991-06-14 | 1992-06-10 | Nickel electrode for alkali storage batteries |
| PCT/JP1992/000740 WO1992022934A1 (en) | 1991-06-14 | 1992-06-10 | Nickel electrode for alkali storage batteries |
| DE69223116T DE69223116T2 (en) | 1991-06-14 | 1992-06-10 | NICKEL ELECTRODE FOR ALKALINE BATTERIES |
| CA002089496A CA2089496A1 (en) | 1991-06-14 | 1992-06-10 | Nickel electrode for alkaline battery |
| US07/975,579 US5366831A (en) | 1991-06-14 | 1992-06-10 | Nickel electrode for alkaline battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3309960A JPH05121074A (en) | 1991-10-28 | 1991-10-28 | Nickel electrode for alkaline storage battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05121074A true JPH05121074A (en) | 1993-05-18 |
Family
ID=17999436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3309960A Pending JPH05121074A (en) | 1991-06-14 | 1991-10-28 | Nickel electrode for alkaline storage battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05121074A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001357845A (en) * | 2000-06-16 | 2001-12-26 | Canon Inc | Nickel-based secondary battery and method of manufacturing for this secondary battery |
-
1991
- 1991-10-28 JP JP3309960A patent/JPH05121074A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001357845A (en) * | 2000-06-16 | 2001-12-26 | Canon Inc | Nickel-based secondary battery and method of manufacturing for this secondary battery |
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