GB2327943A - Preparing nickel hydroxide - Google Patents
Preparing nickel hydroxide Download PDFInfo
- Publication number
- GB2327943A GB2327943A GB9812058A GB9812058A GB2327943A GB 2327943 A GB2327943 A GB 2327943A GB 9812058 A GB9812058 A GB 9812058A GB 9812058 A GB9812058 A GB 9812058A GB 2327943 A GB2327943 A GB 2327943A
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- GB
- United Kingdom
- Prior art keywords
- nickel
- reactor
- solution
- concentration
- nickel hydroxide
- 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.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/006—Compounds containing, besides nickel, two or more other elements, with the exception of oxygen or hydrogen
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/04—Oxides; Hydroxides
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/11—Powder tap density
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
-
- 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
- H01M4/32—Nickel oxide or hydroxide 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)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
A method of preparing a high-density nickel hydroxide active material comprises mixing a nickel sulfate solution 1 with aqueous ammonia 2 and simultaneously spraying the mixed solution 4 into a reactor 9 while feeding a sodium hydroxide solution 8 to the reactor so as to produce nickel hydroxide 10. The nickel sulfate solution may include an additive such as Co, Cd, Zn, Ca, Mg and/or B. Examples describe the preparation of nickel hydroxide particles of 2-40 micron diameter containing up to 3.4 wt% Co and up to 3.7 wt% Zn. The nickel hydroxide product is used in nickel-based batteries.
Description
2327943 METHOD OF PREPARING HIGH-DENSITY NICKEL HYDROXIDE ACTIVE MATERIAL
CROSS REFERENCE TO RELATED APPLICATION
This application is based on application No. 97-37202 filed in the Korean Industrial Property Office on August 4, 1997, the content of which is incorporated hereinto by reference.
BACKGROUND OF THE INVENTION (a) Field of the Invention
This invention relates to a method of preparing a high-density nickel hydroxide active material for a nickel-based battery, and more particularly, to a method of preparing a high-density nickel hydroxide active material having good physical properties.
is (b) Description of the Related Art
The physical properties of nickel hydroxide for use in positive electrodes of the nickel-based batteries largely vary in accordance with the preparing conditions.
Generally, nickel hydroxide is prepared by mixing a nickel salt with a hydroxide salt and adding a trace of water to the mixture for a neutralizing purpose. In this method, the resulting products are "coarse particles having diameters of 1 to several hundreds micrometers. Therefore, in order 1o use the coarse particles for the electrode active materials, they should be ground to be reduced in size. In addition, even the ground particles might be inappropriate for the battery use because of their irregular sizes as weN as the poor density.
Alternatively, when an aqueous solution instead of water is added for the neutralizing purpose, the reaction rate becomes fast so that the produced particles are extremely small in size, requiring a relatively long filtering or washing process. In addition, when a paste of nickel hydroxide is prepared by using such particles, the water soaked in the particles makes it difficult to prepare a dense paste capable of giving a high-density characteristic.
In order to prepare such a dense paste of nickel hydroxide suitable for the high-density electrode use, the nickel hydroxide particles, to be used as a precursor, should be spherical in shape, uniform in size, and closely packed.
Specifically, the. nickel hydroxide particles should have an apparent density of is 1.6-1.7 g1CM3, a tapping density of 2.0 - 2.1 g/CM3, and a particle size of 5 - 40 Such characteristics can be obtained by slowly growing nickel hydroxide while controlling its reaction rate. For that purpose, nickel ammonium complex ions are formed and, subsequently, decomposed by using a neutralizing or heating technique. However, in this way, even though nickel hydroxide having a high-density characteristic can be obtained, K is still difficult to control the reaction rate and particle size. Furthermore, such a process cannot be performed in serial because of the severe change in pH and 2 is composition of the reactive material.
In the meantime, it has been reported that the electrode swelling, being considered as a main factor of the electrode deterioration, occurs when a P NiOOH phase is changed into a y-NiOOH phase with a poor density at the charging process. Such an electrode swelling causes detachment of the active material, resulting in decreased ionic conductivity as well as the reduced lifetime related to the bad electrode efficiency. The yc-NiOOH phase is known to be proliferated due to the compact crystalline structure of high- density nickel hydroxide. In such a crystalline structure, the number of internal micro- pores, enabling free movement of ions, is liable to be reduced.
When an over-voltage is applied to the electrode, accompanying with elevated electric potential, P-NDOH is continuously oxidized and changed into y-NiOOH having a poor density and a relatively high oxidation number. At this time, the volume expansion of the active material occurs, resulting in the electrode swelling. Furthermore, the repeated charge and discharge cycles creates detachment of the active material from the electrode, resulting in deteriorated ionic conductivity as well as the bad capacity. These defects can be found to be more abundant at a high-rate charge and discharge process.
It has been reported that bivalent elements such as cobalt, zinc, cadmium, etc. could be added to nickel hydroxide to prevent proliferation of the y-NiOOH phase. The bivalent elements partly substitute the sites of nickel, accompanied by change in the lattice structure. This means that the interspersed hydrogen ions can be freely moved in the lattice and the over- 3 voltage can be lowered.
Korean Patent Laid-open Publication No. 95-31911 discloses a method of adding such bivalent elements to nickel hydroxide. In the method, a solution of nickel salt containing the bivalent elements is first mixed with aqueous ammonia in a bath. Thereafter, the mixed solution reacts with a sodium hydroxide solution in a reactor. The mixing bath and the reactor are pre-heated by 35 - 90 1C.
However, in the aforementioned method, the nickel-ammonium complex ions are precipitated in the mixing bath, resulting in decreased production efficiency. Furthermore, an additional step of oxidizing the bivalent ion into a trivalent ion is necessarily required.
SUMMARY OF THE MENTION
It is an object of the present invention to provide a method of preparing a high-density nickel hydroxide active material for a nickel-based battery in which precipitates of nickel-ammonium complex ions are not generated and the additional oxidizing step is not needed.
In order to achieve the object, the present invention provides a method of preparing a high-density nickel hydroxide active material in which a nickel sulfate solution is mixed with aqueous ammonia to form a mixed solution including nickel-ammonium complex ions, and at the same time, the mixed solution is sprayed into a reactor while feeding a sodium hydroxide solution to the reactor to react them and produce nickel hydroxide.
4 Furthermore, at least one element selected from cobalt, zinc, cadmium, calcium, magnesium, boron or a mixture thereof may be added to the nickel sulfate solution with a concentration in the range of 0.05 to 0.8M, thereby preventing generation of r -NiOOH.
BRIEF DESCRIPTION OF THE DRAWINGS
A more complete appreciation of the invention, and many of the attendant advantages thereof, will be readily apparent as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawing, wherein:
FIG. 1 is a schematic diagram of a device for preparing a nickel hydroxide active material according to the present invention.
DETAILED DESCRIPTION OF THE INVENTION
A method of preparing a nickel hydroxide active material for use in a Ni MH battery will be now described with reference to Fig. 1.
As shown in Fig. 1, a nickel sulfate solution 1 and aqueous ammonia 2 are continuously fed into and mixed in a spraying tube 3 immersed in a reactor 9 at a predetermined ratio. Simultaneously, the mixed solution 4 is sprayed into the reactor 9 while feeding a sodium hydroxide solution 6 thereto. In this method, ammonium-nickel complex ions of the mixed solution 4 are not precipitated in the spraying tube because the mixing and spraying steps are simultaneously performed. Furthermore, an additional step of oxidizing bivalent ions into trivalent ions is not needed because oxygen is introduced into is the mixed solution 4 during the spraying step.
When sprayed into the reactor 9 and mixed by an agitator 5, the mixed solution 4 reacts with the sodium hydroxide solution 6 to thereby produce nickel hydroxide 10. At this time, the quantity of the sodium hydroxide solution 6 is automatically controlled by a pH controller 7 to keep a constant pH in the reactor 9.
The nickel sulfate solution 1 contains nickel sulfate as a main component and additionally includes at least one additive selected from bivalent metals such as cobalt, cadmium, zinc, calcium or magnesium, or nonmetallic materials such as boron.
It is preferable that the temperature of the reactor 9 is kept at 35 70 r by a thermostat 8 to control the reaction rate and stabilize the solution during reaction. When the temperature is below 35 1C, the reaction rate decreases.. On the contrary, when the temperature is above 70 r, the solution becomes unstable due to increased evaporation of ammonia. The temperature of the spraying tube 3 can be constantly kept to be identical with that of the reactor 9 because the spraying tube 3 is immersed in the reactor 9.
The pH of the solution in the reactor 9 is preferably kept at 11 - 13 with a deviation of 0.1. When the pH is out of the range, the resulting particles become extremely small in size.
In the process, the resulting nickel hydroxide particles preferably stay in the reactor 9 for 2.5 - 6 hours to be endowed with suitable sizes. When the 6 staying time is over 6 hours, the particle size becomes undesirably great.
The concentration of the nickel sulfate solution is preferably kept at 2. 0 - 2.8 M. When the concentration is below 2.0 M, the quantity of solution to be treated is too much. On the contrary, when the concentration is above 2.8 M, precipitates of nickel sulfate are easily generated. The concentration of ammonia in the aqueous ammonia is preferably kept at 12.0 - 16.0 M.
The concentration of the sodium hydroxide solution is preferably kept at 5.0 - 8.0 M. When the concentration is above 8.0 M, the physical properties of nickel change as a partial change in pH of the solution occurs.
The mixture ratio of the nickel sulfate solution and aqueous ammonia is controlled to be preferably 0.3 - 1.5 M of ammonia per 1 M nickel. When the mixture ratio is below 0.3 M, ammonia has no effective role. On the contrary, when the mixture ratio is above 1.5 M, the production yield decreases.
The -mixture ratio of the mixed solution and the sodium hydroxide solution is automatically controlled by a-pH controller to be 1.9 - 2.3 M per 1 M nickel. At this time, pH in the reactor 9 should be kept at a constant level because the physical properties largely vary in accordance to the change in pH.
The additive added in the nickel sulfate solution is kept at 0.05 - 0.8 M and includes at least one element selected from cobalt, cadmium, zinc, calcium, magnesium, boron, or a mixture thereof. The additive is preferably kept at 0.05 - 0.3 M. When the amount of additive is out of the range, the physical properties of nickel hydroxide are deteriorated.
7 As described above, nickel hydroxide according to the present invention is prepared in the form of high-density particles having an apparent density of 1.5 - 1.8 g1CM3 and a tapping density of 1.9 - 2.3 g/CM3.
When such nickel hydroxide is used for the positive electrode, a highdensity nickel-based battery having increased packing density, improved fluidity and uniform capacity, etc. can be prepared. Furthermore, additives such as cobalt, cadmium, zinc, etc. can give increased utilization ratio, improved capacity, high-rate charge and discharge characteristic, etc. to the nickel-based battery. Accordingly, such a nickel hydroxide active material can be efficiently applied to various industrial fields using nickel-based batteries including nickelmetal hydride batteries, nickel-cadmium batteries, nickel-iron batteries, nickelzinc batteries, etc.
The following are illustrative examples of the invention. The invention can be utilized in various ways and is not intended to be confined to those is examples.
Example 1
A 2.3 M nickel sulfate solution including cobalt at a concentration of 0. 1 M and zinc at a concentration of 0.1 M, and a 15 M aqueous ammonia solution were fed to and mixed in a spraying tube, immersed in a reactor pre-heated up to WC, at a ratio of 0.55 moles of ammonia per 1.0 mole of nickel. Simultaneously, the mixed solution was sprayed into the reactor, keeping the inner temperature at 500C, while automatically feeding a 6.0 M sodium hydroxide solution thereto so as to maintain the pH at 11.5. The mixed solution reacted with the sodium hydroxide solution to thereby produce nickel hydroxide. At this time, the 8 produced nickel hydroxide stayed in the reactor for 3 hours. The physical properties of nickel hydroxide were tested and the results are given in the following Table 1.
Table 1
Apparent density 1.72 g/cm' Tap density 2.06 g/cm' Particle size 2 - 40 gm Composition Co: 1.4 wt% Zn: 1.5 wt% Example 2
A 2.5 M nickel sulfate solution including cobalt at a concentration of 0. 15 M and zinc at a concentration of 0.15 M, and a 15 M aqueous ammonia solution were fed to and mixed in a spraying tube, immersed in a reactor pre-heated up to 500C, at a ratio of 0.65 moles of ammonia per 1.0 mole of nickel. Simultaneously, the mixed solution was sprayed into the reactor, keeping the inner temperature at 500C, while automatically feeding a 6.0 M sodium hydroxide solution thereto so as to maintain the pH at 11.5. The mixed solution reacted with the sodium hydroxide solution to thereby produce nickel hydroxide. At this time, the produced nickel hydroxide stayed in the reactor for 3.9 hours. The physical properties of nickel hydroxide were tested and the results are given in the following Table 2.
9 Table 2
Apparent density 1.65 g/CM3 Tap density 2.20 g1CM3 Particle size 2 - 30gm Composition Co: 2.1 wtO/h Zn: 2.4 wt% Example 3
A 2.5 M nickel sulfate solution including cobalt at a concentration of 0. 27 M and zinc at a concentration of 0.27 M, and a 15 M aqueous ammonia solution were fed to and mixed in a spraying tube, immersed in a reactor pre-heated up to 500C, at a ratio of 0.55 moles of ammonia per 1.0 mole of nickel. Simultaneously, the mixed solution was sprayed into the reactor, keeping the inner temperature at 500C, while automatically feeding a 6.0 M sodium hydroxide solution thereto so as to maintain the pH at 11.5. The mixed solution reacted with the sodium hydroxide solution to thereby produce nickel hydroxide. At this time, the produced nickel hydroxide stayed in the reactor for 5.5 hours. The physical properties of nickel hydroxide were tested and the results are given in the following Table 3.
Table 3
Apparent density 1.63 g1CM3 Tap density Particle size Composition 2.25 g/cm' 2 - 25 gm Co: 3.4 wt % Zn: 3.7 wt % The nickel hydroxide active materials prepared from the above examples were found to be powdered partirJes endowed with high-density characteristics such as an apparent density ranged from 1.5 to 1.8 g/CM3, a tapping density ranged from 1.9 to 2.3 g/cm3, and a particJe size ranged from 2 to 40 gm. Furthermore, during the active material preparing process, precipitates of nickel-ammonium complex ions did not occur and an additional step of oxidizing cobalt was not needed. Accordingly, it can be easily known that the inventive nickel hydroxide active material can be applied to various nickel-based secondary batteries owing to its high- density characteristic.
While the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that various modifications and substitutions can be made thereto without departing from the spirit and scope of the present invention as set forth in the appended claims.
11
Claims (13)
1. A method of preparing a high-density nickel hydroxide active material comprising the steps of.
mixing a nickel sulfate solution with aqueous amm onia to form a mixed solution including nickel-ammonium complex ions; and spraying the mixed solution to a reactor while feeding a sodium hydroxide solution to the reactor to react the mixed solution with the sodium hydroxide solution and produce nickel hydroxide; wherein the mixing step and the spraying step are performed substantially at the same time.
2. The method of claim 1 wherein the nickel sulfate solution comprises at least one additive selected from the group consisting of cobalt, cadmium, zinc, calcium, magnesium, boron and a mixture thereof at a concentration of from 0.05 to 0.8 M.
3. The method of claim 2 wherein the concentration of the additive is 0.05 - 0.3 M.
4. Ihe method of any one of claims 1 to 3 wherein the nickel sulfate solution has a concentration of from 2.0 to 2.8 M.
5. The method of anyone of claims 1 to 4 wherein the aqueous ammonia has a concentration of from 12.0 to 16.0 M.
Doc: 270922 retyped 316198 12
6. The method of any one of claims 1 to 5 wherein the sodium hydroxide solution has a concentration of from 5.0 to 8.0 M.
7. The method of any one of claims 1 to 6 further comprising the step of controlling the mixing ratio of the nickel sulfate, solution and the aqueous ammonia to be 0.3 - 1.5 moles of ammonia per 1 mole of nickel.
8. The method of any one of claims 1 to 7 flu-ther comprising the step of keeping a constant pH in the reactor by controlling the mixing ratio of the mixed solution and the sodium hydroxide solution to be 1.
9 - 2.3 moles of hydroxyl group per 1 mole of nickel. 9. The method of any one of claims 1 to 8 wherein the reactor is preheated up to and kept at 35 - 700C.
10. The method of any one of claims 1 to 9 wherein the pH of the reactor is kept at
11 - 13 with a deviation + 0.1. 11. Ihe method of any one of claims 1 to 10 wherein the produced nickel hydroxide stays in the reactor for 2,5 - 6 hours.
12. The method of any one of claims 1 to 11 wherein the spraying tube is immersed in the reactor.
13. The method according to any one of claims 1 to 12 substantially as described herein with reference to Examples 1 to 3.
Doc: 270922 316198 13
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970037202A KR19990015234A (en) | 1997-08-04 | 1997-08-04 | Manufacturing method of high density nickel hydroxide active material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9812058D0 GB9812058D0 (en) | 1998-08-05 |
| GB2327943A true GB2327943A (en) | 1999-02-10 |
Family
ID=19516835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9812058A Withdrawn GB2327943A (en) | 1997-08-04 | 1998-06-04 | Preparing nickel hydroxide |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH1167200A (en) |
| KR (1) | KR19990015234A (en) |
| DE (1) | DE19823129A1 (en) |
| GB (1) | GB2327943A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008043559A1 (en) * | 2006-10-13 | 2008-04-17 | Toda Kogyo Europe Gmbh | Pulverulent compounds, processes for the preparation thereof and the use thereof in electrochemical applications |
| RU2463254C1 (en) * | 2011-03-09 | 2012-10-10 | Общество с ограниченной ответственностью "НИКОЛЬ" | Method of producing nickel (ii) hydroxide |
| CN106823457A (en) * | 2017-03-14 | 2017-06-13 | 南昌安润科技有限公司 | One kind extracts the nickel sulfate type extraction equipment that stirs from old and useless battery |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002083599A (en) * | 2000-09-07 | 2002-03-22 | Sony Corp | Positive electrode mixture and nickel zinc battery |
| DE10245467A1 (en) * | 2002-09-28 | 2004-04-08 | Varta Automotive Systems Gmbh | Active nickel mixed hydroxide cathode material for alkaline batteries and process for its production |
| JP2006265086A (en) * | 2005-02-24 | 2006-10-05 | Toyota Motor Corp | Method and apparatus for manufacturing nickel hydroxide particles |
| JP6136604B2 (en) * | 2013-06-10 | 2017-05-31 | 住友金属鉱山株式会社 | Method for producing nickel cobalt composite hydroxide particles |
| JP7025324B2 (en) * | 2016-06-07 | 2022-02-24 | 株式会社田中化学研究所 | Reactor for obtaining inorganic particles and method for producing inorganic particles |
| JP6142295B1 (en) * | 2016-06-07 | 2017-06-07 | 株式会社田中化学研究所 | Positive electrode active material for secondary battery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5186099A (en) * | 1975-01-28 | 1976-07-28 | Tokyo Shibaura Electric Co | |
| JPH026340A (en) * | 1988-04-13 | 1990-01-10 | Kansai Shokubai Kagaku Kk | Production of nickel hydroxide |
| CN1107442A (en) * | 1994-02-26 | 1995-08-30 | 王维波 | Process for preparing nickel hydroxide |
| US5498403A (en) * | 1994-05-20 | 1996-03-12 | Hyundai Motor Company | Method for preparing high density nickel hydroxide used for alkali rechargeable batteries |
-
1997
- 1997-08-04 KR KR1019970037202A patent/KR19990015234A/en not_active Application Discontinuation
-
1998
- 1998-05-23 DE DE19823129A patent/DE19823129A1/en not_active Ceased
- 1998-06-02 JP JP10151814A patent/JPH1167200A/en active Pending
- 1998-06-04 GB GB9812058A patent/GB2327943A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5186099A (en) * | 1975-01-28 | 1976-07-28 | Tokyo Shibaura Electric Co | |
| JPH026340A (en) * | 1988-04-13 | 1990-01-10 | Kansai Shokubai Kagaku Kk | Production of nickel hydroxide |
| CN1107442A (en) * | 1994-02-26 | 1995-08-30 | 王维波 | Process for preparing nickel hydroxide |
| US5498403A (en) * | 1994-05-20 | 1996-03-12 | Hyundai Motor Company | Method for preparing high density nickel hydroxide used for alkali rechargeable batteries |
Non-Patent Citations (3)
| Title |
|---|
| Derwent abstract 76-69414X & JP 51 086 099 A * |
| Derwent abstract 90-054055 & JP 02 006 340 A * |
| Derwent abstract 97-342506 & CN 1107442 A * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008043559A1 (en) * | 2006-10-13 | 2008-04-17 | Toda Kogyo Europe Gmbh | Pulverulent compounds, processes for the preparation thereof and the use thereof in electrochemical applications |
| US20100102282A1 (en) * | 2006-10-13 | 2010-04-29 | Stefan Malcus | Pulverulent compounds, processes for the preparation thereof and the use thereof in electrochemical applications |
| US8663507B2 (en) * | 2006-10-13 | 2014-03-04 | Toda Kogyo Europe Gmbh | Pulverulent compounds, processes for the preparation thereof and the use thereof in electrochemical applications |
| KR101397317B1 (en) * | 2006-10-13 | 2014-05-22 | 토다 고교 유럽 게엠베하 | Pulverulent compounds, processes for the preparation thereof and the use thereof in electrochemical applications |
| RU2463254C1 (en) * | 2011-03-09 | 2012-10-10 | Общество с ограниченной ответственностью "НИКОЛЬ" | Method of producing nickel (ii) hydroxide |
| CN106823457A (en) * | 2017-03-14 | 2017-06-13 | 南昌安润科技有限公司 | One kind extracts the nickel sulfate type extraction equipment that stirs from old and useless battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1167200A (en) | 1999-03-09 |
| KR19990015234A (en) | 1999-03-05 |
| DE19823129A1 (en) | 1999-02-11 |
| GB9812058D0 (en) | 1998-08-05 |
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Legal Events
| Date | Code | Title | Description |
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| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |