JPH0473864A - Hydrogen storage electrode - Google Patents
Hydrogen storage electrodeInfo
- Publication number
- JPH0473864A JPH0473864A JP2187617A JP18761790A JPH0473864A JP H0473864 A JPH0473864 A JP H0473864A JP 2187617 A JP2187617 A JP 2187617A JP 18761790 A JP18761790 A JP 18761790A JP H0473864 A JPH0473864 A JP H0473864A
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen storage
- hydrogen
- storage electrode
- electrode
- vacuum
- 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.)
- Granted
Links
- 239000001257 hydrogen Substances 0.000 title claims abstract description 40
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 40
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 239000000956 alloy Substances 0.000 abstract description 8
- 229910045601 alloy Inorganic materials 0.000 abstract description 8
- 230000004913 activation Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 abstract description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 1
- 238000007599 discharging Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 150000004678 hydrides Chemical class 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、アルカリ蓄電池に用いる水素吸蔵電極に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hydrogen storage electrode used in an alkaline storage battery.
従来、水素吸蔵合金又は水素化物から成る水素吸蔵電極
は、電気化学的に水素の吸蔵と放出ができることから、
アルカリ蓄電池の負極に用いられている。この水素吸蔵
電極は、安定した容量を取り出せるようになるまで充放
電の繰り返しによって活性化を行うが、一般に、耐久性
の優れた水素吸蔵合金を用いた場合はど初期の活性化に
多くの充放電の繰り返しを必要とする傾向がある。Conventionally, hydrogen storage electrodes made of hydrogen storage alloys or hydrides can absorb and release hydrogen electrochemically.
Used in the negative electrode of alkaline storage batteries. This hydrogen storage electrode is activated by repeated charging and discharging until a stable capacity can be obtained, but in general, when a highly durable hydrogen storage alloy is used, many charges are required for initial activation. They tend to require repeated discharges.
然し乍ら、上記の従来製造された水素吸蔵電極は、初期
の活性化を得るまで多くの充放電を繰り返す事は、これ
を用いた電池の製造工程上相当の手間と時間、コストを
要し、極めて不都合である。However, the conventionally manufactured hydrogen storage electrode described above requires considerable effort, time, and cost in the manufacturing process of a battery using it, and it is extremely difficult to repeatedly charge and discharge it until initial activation is achieved. It's inconvenient.
本発明は、か翫る課題を解決するために成されたもので
あり、多くの充放電の繰り返しを要しない水素吸蔵電極
を提供するもので、製造された水素吸蔵電極を、真空又
は水素雰囲気中で加熱処理して成る。The present invention was made in order to solve the above problems, and provides a hydrogen storage electrode that does not require many repetitions of charging and discharging. It is heated inside.
本発明の作用は明らかでないが、上記の真空中又は水素
雰囲気中により、該電極を加熱処理するときは、水素吸
蔵合金又は水素化物の粒子表面に吸着された主に酸素か
ら成る気体分子が取り除かれ、水素の吸蔵・脱蔵が速か
に行われるものと考えられ、これにより、水素吸蔵電極
の初期活性化を容易にし、充放電の繰り返しは数回です
む。Although the effect of the present invention is not clear, when the electrode is heat-treated in the vacuum or hydrogen atmosphere described above, gas molecules mainly consisting of oxygen adsorbed on the particle surface of the hydrogen storage alloy or hydride are removed. Therefore, it is thought that hydrogen storage and desorption occur quickly, which facilitates the initial activation of the hydrogen storage electrode and requires only a few repetitions of charging and discharging.
次に、本発明の実施例を詳細に説明する。 Next, embodiments of the present invention will be described in detail.
市販のミツシュメタルＨ１、Ｎ１、ＣＯ１＾１を一定の
組成比になるように秤量して混合し、アーク溶解法によ
り加熱溶解させた。−例として、合金組成がＨｉＮｉ、
ｏＣｏ、ＡｔＣ，、、になるように選択し、負極用の水
素吸蔵合金を得た。この合金を機械的に粉砕して２５０
メツシユ以下の粉末とし、この粉末に５ｗｔ、％のフッ
素樹脂粉末と導電剤としてのカーボニルニッケルパウダ
ー２０ｗｔ、％を添加し、フッ素樹脂が十分に繊維化す
るまで混合した。そして、この混合物を集電体であるニ
ッケル金網に乗せ、加圧して水素吸蔵電極を製造した。Commercially available Mitshu Metal H1, N1, and CO1^1 were weighed and mixed to a constant composition ratio, and heated and melted using an arc melting method. - For example, if the alloy composition is HiNi,
oCo, AtC, . . . were selected to obtain a hydrogen storage alloy for a negative electrode. This alloy is mechanically crushed to 250
A powder with a mesh size or smaller was prepared, and 5 wt.% of fluororesin powder and 20 wt.% of carbonyl nickel powder as a conductive agent were added to this powder and mixed until the fluororesin was sufficiently fiberized. Then, this mixture was placed on a nickel wire gauze serving as a current collector and pressurized to produce a hydrogen storage electrode.
この電極を、例えば、０．０１トールの真空中で、８０
℃で５時間加熱し、本発明の水素吸蔵電極Ａをセルの負
極として用いた。別個に、上記に製造した水素吸蔵電極
を、常圧の水素雰囲気で８０℃で５時間加熱し、本発明
の水素吸蔵電極Ｂを、セルの負極として用いた。比較の
ため、これらの処理を行わない上記に製造した水素吸蔵
電極Ｃをそのま１セルの負極として用いた。This electrode is heated, for example, in a vacuum of 0.01 Torr at 80
C. for 5 hours, and the hydrogen storage electrode A of the present invention was used as the negative electrode of the cell. Separately, the hydrogen storage electrode manufactured above was heated at 80° C. for 5 hours in a hydrogen atmosphere at normal pressure, and the hydrogen storage electrode B of the present invention was used as the negative electrode of the cell. For comparison, the above-manufactured hydrogen storage electrode C without any of these treatments was used as it was as a negative electrode for one cell.
これらの電＆Ａ、Ｂ、Ｃを夫々負極とし、公知の焼結式
Ｎ１極と組み合わせ、電解液に水酸化カリウム水溶液を
用いて負極規制の試験セルとしな、セルの充・放電条件
としては、０．５°Ｃで２．５時間（１２５％充電）充
電したのち、０．５℃でセル電圧１．Ｏｖまで放電した
。そして、負極容量が安定するのに要する充放電回数を
調べた。この結果を下記衣に示す。即ち、下記第１表は
、本発明処理による電ｉＡ、Ｂと未処理の、即ち、従来
の電極Ｃにつき、その初期活性化に要した充放電回数を
示す。These electrodes A, B, and C were used as negative electrodes, combined with a known sintered N1 electrode, and a potassium hydroxide aqueous solution was used as the electrolyte to form a negative electrode regulated test cell.The cell charging and discharging conditions were as follows: After charging at 0.5°C for 2.5 hours (125% charge), the cell voltage reached 1.5° at 0.5°C. It was discharged to Ov. Then, the number of charging and discharging cycles required for the negative electrode capacity to stabilize was investigated. The results are shown below. That is, Table 1 below shows the number of times of charging and discharging required for initial activation of the electrodes iA and B treated according to the present invention and the untreated, ie, conventional electrode C.
第１表
安定した時の容量は何れの負極も約２３０ｎＡｈ／ｇで
あるが、第１表から明らかなように、何も処理を行わな
い従来電極Ｃは、容量が安定化するのに２０回の充放電
の繰り返しを必要としたのに対して、本発明処理を施し
た電極Ａ−Ｂは、何れも５回、３回という極めて少ない
充放電サイクルで容量が安定化した。尚、上記実施例に
おいて、電極Ｂの処理には水素雰囲気として水素単独を
用いたが、水素に不活性ガスや窒素が混入した混合ガス
から成る水素雰囲気でも上記と同様の効果が得られた。Table 1: The capacity when stabilized is approximately 230 nAh/g for all negative electrodes, but as is clear from Table 1, for conventional electrode C, which is not subjected to any treatment, it takes 20 cycles for the capacity to stabilize. In contrast, the capacity of electrodes A-B treated with the present invention was stabilized after only 5 and 3 charge/discharge cycles, which were extremely small. In the above example, hydrogen alone was used as the hydrogen atmosphere for the treatment of electrode B, but the same effect as above was obtained even in a hydrogen atmosphere consisting of a mixed gas of hydrogen mixed with an inert gas or nitrogen.
又、原料として、水素吸蔵合金に代え、水素化物につい
ても、同様に電極をつくり、これを負極としたセルにつ
いて、上記と同様の試験を行ったが、同様の効果を得た
。Furthermore, an electrode was made in the same manner using a hydride instead of the hydrogen storage alloy as the raw material, and the same test as above was conducted on a cell using this as the negative electrode, and the same effect was obtained.
以上のように、本発明によれば、製造した水素吸蔵電極
を、真空中で或いは水素雰囲気中で加熱処理したので、
充放電サイクル数が少なくてすむ初期活性化の容易な水
素吸蔵電極を得ることができる効果を有する。As described above, according to the present invention, the manufactured hydrogen storage electrode is heat-treated in vacuum or in a hydrogen atmosphere.
This has the effect of making it possible to obtain a hydrogen storage electrode that requires only a small number of charge/discharge cycles and is easy to initially activate.
Claims (1)
で加熱処理されて成る水素吸蔵電極。1. A hydrogen storage electrode obtained by heat-treating the manufactured hydrogen storage electrode in a vacuum or hydrogen atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2187617A JPH0797495B2 (en) | 1990-07-16 | 1990-07-16 | Hydrogen storage electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2187617A JPH0797495B2 (en) | 1990-07-16 | 1990-07-16 | Hydrogen storage electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0473864A true JPH0473864A (en) | 1992-03-09 |
| JPH0797495B2 JPH0797495B2 (en) | 1995-10-18 |
Family
ID=16209244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2187617A Expired - Lifetime JPH0797495B2 (en) | 1990-07-16 | 1990-07-16 | Hydrogen storage electrode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0797495B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51148624A (en) * | 1975-06-17 | 1976-12-21 | Mitsubishi Heavy Ind Ltd | Method of fabricating hydrogen occlusive metals |
| JPH01102855A (en) * | 1987-10-14 | 1989-04-20 | Matsushita Electric Ind Co Ltd | Hydrogen storage alloy electrode |
| JPH01161674A (en) * | 1987-12-17 | 1989-06-26 | Matsushita Electric Ind Co Ltd | Manufacturing method of alkaline secondary battery using hydrogen storage alloy |
| JPH01204371A (en) * | 1988-02-08 | 1989-08-16 | Matsushita Electric Ind Co Ltd | Manufacturing method of alkaline secondary battery |
-
1990
- 1990-07-16 JP JP2187617A patent/JPH0797495B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51148624A (en) * | 1975-06-17 | 1976-12-21 | Mitsubishi Heavy Ind Ltd | Method of fabricating hydrogen occlusive metals |
| JPH01102855A (en) * | 1987-10-14 | 1989-04-20 | Matsushita Electric Ind Co Ltd | Hydrogen storage alloy electrode |
| JPH01161674A (en) * | 1987-12-17 | 1989-06-26 | Matsushita Electric Ind Co Ltd | Manufacturing method of alkaline secondary battery using hydrogen storage alloy |
| JPH01204371A (en) * | 1988-02-08 | 1989-08-16 | Matsushita Electric Ind Co Ltd | Manufacturing method of alkaline secondary battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0797495B2 (en) | 1995-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0773878A (en) | Manufacture of metal hydride electrode | |
| JPS60185362A (en) | Manufacture of hydrogen storage electrode | |
| CN117203791A (en) | High-entropy hydrogen storage alloy, negative electrode for alkaline storage battery, and alkaline storage battery | |
| JP5388397B2 (en) | Method for improving the properties of alloy powders for NiMH batteries | |
| JPH03152868A (en) | Treatment of hydrogen storage alloy for alkaline second battery | |
| JPH0473864A (en) | Hydrogen storage electrode | |
| JPH0479474B2 (en) | ||
| US20010007638A1 (en) | Hydrogen occluding alloy for battery cathode | |
| JP3022019B2 (en) | Heat treatment method for hydrogen storage alloy for Ni-hydrogen battery | |
| JP3432870B2 (en) | Method for producing metal hydride electrode | |
| JP2733231B2 (en) | Manufacturing method of hydrogen storage alloy electrode | |
| JPH04308658A (en) | Treatment for metal hydride electrode for alkaline battery | |
| JPH03245460A (en) | Hydrogen storage alloy electrode, its manufacturing method, and sealed alkaline storage battery using the electrode | |
| JP2514103B2 (en) | Manufacturing method of hydrogen storage electrode | |
| JPH0763007B2 (en) | Manufacturing method of hydrogen storage electrode | |
| JPH04318106A (en) | Production of hydrogen storage alloy powder | |
| JP3373989B2 (en) | Hydrogen storage alloy powder and manufacturing method | |
| JPH0756802B2 (en) | Manufacturing method of hydrogen storage electrode | |
| JP2000169903A (en) | Method for producing hydrogen storage alloy powder | |
| JPH04328252A (en) | Hydrogen storage alloy electrode | |
| JPH09213317A (en) | Manufacturing method of hydrogen storage alloy electrode | |
| JP2955351B2 (en) | Hydrogen storage alloy for secondary batteries | |
| JPS6231947A (en) | Manufacture of hydrogen occlusion electrode | |
| JP3322449B2 (en) | Method for producing metal hydride electrode | |
| JPH02306541A (en) | Manufacture of hydrogen storage alloy electrode for alkaline storage battery |