CN1181639A - Method of treating hydrogen storage alloy electrode and nickel-hydrogen secondary battery having hydrogen storage alloy electrode treated by same method - Google Patents
Method of treating hydrogen storage alloy electrode and nickel-hydrogen secondary battery having hydrogen storage alloy electrode treated by same method Download PDFInfo
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- CN1181639A CN1181639A CN97120073A CN97120073A CN1181639A CN 1181639 A CN1181639 A CN 1181639A CN 97120073 A CN97120073 A CN 97120073A CN 97120073 A CN97120073 A CN 97120073A CN 1181639 A CN1181639 A CN 1181639A
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- hydrogen
- alloy electrode
- storage alloy
- electrode
- hydrogen storage
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- 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
- H01M4/26—Processes of manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/34—Gastight accumulators
- H01M10/345—Gastight metal hydride accumulators
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- 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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/52—Removing gases inside the secondary cell, e.g. by absorption
-
- 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
- H01M4/242—Hydrogen storage electrodes
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- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention provides a method of treating hydrogen storage alloy electrode and nickel-hydrogen secondary battery having hydrogen storage alloy electrode treated by same method. The method infuses hydrogen storage alloy electrode in suspend suspending liquid containing hydrophobic resin and surfactant then dries the same, and infuses the dried electrode in organic solvent such as acetone or alcohol, or ejects organic solvent on the dried electrode such that removes surfactant . Because hydrogen storage alloy electrode does not contain promoting agent, inner pressure is reduced such that service life of the battery is prolonged, and the capacity of the battery is maintained well.
Description
The present invention relates to secondary cell, more particularly, relate to a kind of processing method of hydrogen-bearing alloy electrode and have the nickel-hydrogen secondary cell of the hydrogen-bearing alloy electrode of processing in this way.
Recently, along with growing with each passing day of the trend miniaturization of high-performance electronic device and lightweight and portable electric appts supply, but the demand of high power capacity, high energy density cells and charging and discharging secondary battery is significantly increased.
Secondary cell mainly can be divided into lead accumulator group and alkaline cell group.Alkaline cell comprises NI-G secondary cell, nickel-hydrogen secondary cell etc.
The NiH electrode employing nickel electrode of these secondary cells, the hydrogen-bearing alloy electrode that hydrogen bearing alloy is made and the electrolyte such as aqueous slkali.Nickel electrode is made sintered type or paste with nickel hydroxide as active material.Hydrogen-bearing alloy electrode is to use binding agent such as carboxymethyl cellulose or polytetrafluoroethylene to be bonded to support on the parent as active material to produce.
Here, be the clean energy as the hydrogen of hydrogen-bearing alloy electrode, produce water during burning, do not resemble and produce the polluter that resembles carbon oxide gas and so on the fossil fuel.This reaction is undertaken by electrochemical reaction.In other words, along with the release (i.e. discharge) of electric energy, hydrogen becomes water through peroxidating, reverts to hydrogen during supply electric energy (i.e. charging).
The electrochemical reaction of nickel-hydrogen secondary cell can be represented by the formula:
(1) the formula charging reaction representing to take place in the nickel electrode, (2) formula is represented the charging reaction in the hydrogen-bearing alloy electrode, (3) formula represent battery total discharge and recharge reaction.From above all formulas as can be known, the hydrogen that the water decomposition during the hydrogen bearing alloy absorption charge cycle in the electrolyte produces, absorbed this hydrogen then discharges during discharge cycle and enters in the electrolyte, thereby produces by electrochemical reaction.
At this moment, the nickel electrode overcharge can be produced oxygen, (4) formula below this is available is represented:
At this moment, if the oxygen that produces fully do not remove, then battery in press liter, impel the hydrogen-bearing alloy electrode oxidation, thereby shorten the useful life of battery, reduce the capacity of battery.Therefore, oxygen must fully be removed.
For reaching this purpose, it is hydrogen-bearing alloy electrode to be immersed in the suspension that is dispersed with hydrophobic substance make it have hydrophobicity that a kind of method is arranged.Yet this method is added the surfactant that hydrophobic substance is fully spread and can be remained in the hydrogen-bearing alloy electrode.Originally, residual surfactant does not influence the performance of battery, but along with the carrying out of discharge process, surfactant makes battery performance degenerate soon.
Purpose of the present invention will address the above problem exactly, and providing a kind of can increase the service life, do not cause battery performance because of remain in that surfactant in the hydrogen-bearing alloy electrode degenerates the hydrogen-bearing alloy electrode facture.
Another object of the present invention provides that a kind of battery performance was not only good, useful life but also long nickel-hydrogen secondary cell.
According to the present invention, for reaching first purpose, hydrogen-bearing alloy electrode is immersed in the suspension that contains hydrophobic resin and surfactant, dry then.Then, with the organic solvent of acetone or alcohol surfactant is removed.
Second purpose is that the nickel-hydrogen secondary cell by the tool hydrogen-bearing alloy electrode reaches.
Fig. 1 is the characteristic curve that is used for illustrating that hydrogen-bearing alloy electrode handled with method of the present invention nickel-hydrogen secondary cell has prolonged useful life.
The method that the present invention processes hydrogen-bearing alloy electrode can adopt polytetrafluoroethylene (PTFE) or 4 PVFs, 6 fluorine propylene copolymers as hydrophobic resin. As for surfactant, as long as can be used on the field of the invention, any ionic or nonionic surfactant all can add employing. In the pole drying operation, electrode under 40-80 ℃ temperature dry 30 minutes to 2 hours.
In addition, remove in the operation at surfactant, the alcohol that is used as organic solvent can be methyl alcohol, ethanol, propyl alcohol or butanols, does not have the spy to add restriction. Surfactant is removed operation and is immersed in hydrogen-bearing alloy electrode in the organic solvent or organic solvent is ejected on the hydrogen-bearing alloy electrode and carry out.
Illustrate in greater detail the present invention with regard to some examples and comparative example below, but the present invention is not limited to these examples.
In addition, produced battery in the following example is also successively measured its initial internal pressure and discharged and recharged interior pressure afterwards 300 times, its result is as shown in table 1, and the life characteristic of battery then as shown in fig. 1.
Example 1
Hydrogen-bearing alloy electrode is immersed in the suspension of 4 PVFs, the 6 fluorine propylene copolymers that contain 5 weight % (ND-1, Daikin Industrial Co., Ltd produces) and a kind of surfactant, in 60 ℃ stove, carries out drying then.Then, electrode is immersed in the ethanol removing surfactant, and then dry, draws hydrophobic hydrogen-bearing alloy electrode.Hydrogen-bearing alloy electrode through so handling and the nickel hydroxide electrode of making paste combine that to make rated capacity be 1500 milliamperes 4/5 peace battery (to call battery A in the following text).Then, successively measure the initial internal pressure of battery A and discharge and recharge interior pressure after 300 times, wherein charging is carried out at 130% time with 1C, discharges then to reach with 1C and carries out under 1.0 volts the situation.
Example 2
Hydrophobic hydrogen-bearing alloy electrode is produced by example 1 same mode, and just hydrogen-bearing alloy electrode is not to be immersed in the alcoholic solution but to be sprayed with acetone, produces battery B with the hydrophobic hydrogen-bearing alloy electrode that draws then.Then, successively measure the initial internal pressure and the interior pressure that discharges and recharges after 300 times of battery B.
Example 3
Hydrophobic hydrogen-bearing alloy electrode is produced by example 1 same mode, just the suspension that adopts is not to contain ND-1 and surfactant but contain LDW-40 (4 PVFs that Daikin Industrial Co., Ltd makes) and surfactant, produces battery C with the hydrophobic hydrogen-bearing alloy electrode that draws then.Then, successively measure the initial internal pressure and the interior pressure that discharges and recharges after 300 times of battery C.
Comparative example
Hydrogen-bearing alloy electrode is immersed in 60 ℃ stove, carries out drying in the suspension that contains ND-1 and surfactant again, handle electrode.Produce battery D with the electrode of handling like this.Successively measure the initial internal pressure of battery D and discharge and recharge interior pressure afterwards 300 times.
Table 1
| Initial internal pressure (millibar) | Discharge and recharge the interior pressure (millibar) after 300 times | |
| A | 5 | 10 |
| B | 5 | 9 |
| C | 6 | 12 |
| D | 5 | 16 |
As known from Table 1, the initial internal pressure of each battery much at one, but after discharging and recharging through 300 times, battery A, B or C that the battery D that the surfactant of hydrogen-bearing alloy electrode is not removed has removed compared with the surfactant of hydrogen-bearing alloy electrode, interior pressure has improved significantly.
In addition, as shown in fig. 1, come compared with battery D the useful life of battery A, B, C, prolonged significantly.
Therefore, adopt the nickel-hydrogen secondary cell of the hydrogen-bearing alloy electrode of handling with method of the present invention, reduced owing to press in it, thereby long service life, battery performance does not degenerate.
Claims (6)
1. a method of handling hydrogen-bearing alloy electrode is characterized in that it comprises the following steps:
(a) hydrogen-bearing alloy electrode is immersed in the suspension that contains hydrophobic resin and surfactant;
(b) battery is in addition dry;
(c) from electrode, remove surfactant with the organic solvent that is selected from acetone and alcohol.
2. the method for claim 1 is characterized in that, hydrophobic resin is any resin that is selected from polytetrafluoroethylene and 4 PVFs, 6 fluorine propylene copolymers.
3. the method for claim 1 is characterized in that, the drying in the described operation (b) is lasted 30 minutes to 2 hours and carried out under 40-80 ℃.
4. the method for claim 1 is characterized in that, removing by electrode is immersed in the organic solvent of surfactant undertaken in the described operation (c).
5. the method for claim 1 is characterized in that, removing by organic solvent is ejected on the electrode of surfactant undertaken in the described operation (c).
6. a nickel-hydrogen secondary cell is characterized in that, adopts the hydrogen-bearing alloy electrode of 1 to 7 arbitrary claim.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR44904/96 | 1996-10-09 | ||
| KR1019960044904A KR19980026467A (en) | 1996-10-09 | 1996-10-09 | Method for producing hydrogen electrode plate and nickel-hydrogen secondary battery having the hydrogen electrode plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1181639A true CN1181639A (en) | 1998-05-13 |
Family
ID=19476837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97120073A Pending CN1181639A (en) | 1996-10-09 | 1997-10-09 | Method of treating hydrogen storage alloy electrode and nickel-hydrogen secondary battery having hydrogen storage alloy electrode treated by same method |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR19980026467A (en) |
| CN (1) | CN1181639A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1323444C (en) * | 2005-08-30 | 2007-06-27 | 包头稀土研究院 | Method for improving magnesium-based hydrogen-storage electrode capacity attenuation for nickel-hydrogen battery |
| CN100459271C (en) * | 2005-12-06 | 2009-02-04 | 比亚迪股份有限公司 | Method for making alkali secondary cell |
-
1996
- 1996-10-09 KR KR1019960044904A patent/KR19980026467A/en not_active Application Discontinuation
-
1997
- 1997-10-09 CN CN97120073A patent/CN1181639A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1323444C (en) * | 2005-08-30 | 2007-06-27 | 包头稀土研究院 | Method for improving magnesium-based hydrogen-storage electrode capacity attenuation for nickel-hydrogen battery |
| CN100459271C (en) * | 2005-12-06 | 2009-02-04 | 比亚迪股份有限公司 | Method for making alkali secondary cell |
Also Published As
| Publication number | Publication date |
|---|---|
| KR19980026467A (en) | 1998-07-15 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |