CN109148834A - A kind of surface coated foam nickel electrode of hydroxy cobalt oxide and preparation method thereof - Google Patents
A kind of surface coated foam nickel electrode of hydroxy cobalt oxide and preparation method thereof Download PDFInfo
- Publication number
- CN109148834A CN109148834A CN201710500414.4A CN201710500414A CN109148834A CN 109148834 A CN109148834 A CN 109148834A CN 201710500414 A CN201710500414 A CN 201710500414A CN 109148834 A CN109148834 A CN 109148834A
- Authority
- CN
- China
- Prior art keywords
- cobalt oxide
- surface coated
- nickel electrode
- foam nickel
- coated foam
- 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
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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
-
- 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
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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 invention discloses a kind of methods for preparing the surface coated foam nickel electrode of hydroxy cobalt oxide, this method comprises: nickel hydroxide is placed in the cobalt chloride solution of 0.1 ~ 0.5mol/L, the potassium hydroxide solution of 0.5 ~ 1mol/L is slowly added dropwise under 30 ~ 40 DEG C of stirrings, the solid being obtained by filtration after precipitating is complete is transferred in the potassium hydroxide solution of 5 ~ 7mol/L, after addition sodium hypochlorite is fully oxidized under 60 ~ 80 DEG C of constant temperature, obtained product is washed to neutrality, it is dry, grinding, sieving is to get the surface coated foam nickel electrode of hydroxy cobalt oxide.The invention also discloses a kind of surface coated foam nickel electrodes of hydroxy cobalt oxide prepared by the above method.The surface coated foam nickel electrode of hydroxy cobalt oxide made from chemical oxidization method of the invention, stability with higher and capacity retention ratio.
Description
Technical field
The invention belongs to technical field of nickel, and in particular to a kind of surface coated foam nickel electrode of hydroxy cobalt oxide
And preparation method thereof.
Background technique
Nickel-metal hydride battery due to its higher energy density and power density, longer cyclical stability and cheap price,
It is widely applied in portable electrical appliance and electric vehicle.Nickel-metal hydride battery uses foam nickel electrode, the conductive network of foam nickel electrode
It is made of foaming Ni substrate and hydroxy cobalt oxide.Currently, the hydroxy cobalt oxide in foam nickel electrode is mainly by being mixed into nickel electrode
In cobalt oxide be transformed, in alkaline medium, cobalt oxide by dissolution, deposition be coated on nickel hydroxide surface, filled for the first time
The hydroxy cobalt oxide (i.e. electrochemical oxidation) with excellent conductive performance is converted into when electric.However, if foam nickel electrode is put
Electric potential is more lower than its normal operating potential, and hydroxy cobalt oxide can be reduced and be converted into indissoluble and active low cobalt chemical combination
Object causes foam nickel electrode conductive network to be destroyed, and causes charge/discharge capacity irreversible loss.Therefore, it is necessary to prepare stability
The higher surface coated foam nickel electrode of hydroxy cobalt oxide.
Summary of the invention
Goal of the invention: the object of the present invention is to provide a kind of sides for preparing the surface coated foam nickel electrode of hydroxy cobalt oxide
Method prepares the surface coated foam nickel electrode of hydroxy cobalt oxide of high stability.
Technical solution: the present invention provides a kind of method for preparing the surface coated foam nickel electrode of hydroxy cobalt oxide, the party
Method includes: that nickel hydroxide is placed in the cobalt chloride solution of 0.1 ~ 0.5mol/L, 0.5 is slowly added dropwise under 30 ~ 40 DEG C of stirrings ~
The potassium hydroxide solution of 1mol/L, the solid being obtained by filtration after precipitating is complete are transferred in the potassium hydroxide solution of 5 ~ 7mol/L,
After addition sodium hypochlorite is fully oxidized under 60 ~ 80 DEG C of constant temperature, obtained product is washed to neutrality, it is dry, it grinds, sieving, i.e.,
Obtain the surface coated foam nickel electrode of hydroxy cobalt oxide.
Preferably, the amount of the substance of the sodium hypochlorite of addition is 2 ~ 3 times of cobalt chloride.
Another aspect of the present invention provides a kind of surface coated foam nickel electrode of hydroxy cobalt oxide, the hydroxy cobalt oxide surface
The foam nickel electrode of cladding is made by the above method.
The utility model has the advantages that the surface coated foam nickel electrode of hydroxy cobalt oxide made from chemical oxidization method of the invention, has
Higher stability and capacity retention ratio.
Specific embodiment
Embodiment 1
A kind of surface coated foam nickel electrode of hydroxy cobalt oxide, preparation method includes: that nickel hydroxide is placed in 0.1mol/L
Cobalt chloride solution in, be slowly added dropwise the potassium hydroxide solution of 1mol/L under 40 DEG C of stirrings, precipitating completely after be obtained by filtration consolidates
Body is transferred in the potassium hydroxide solution of 5mol/L, be added under 60 DEG C of constant temperature sodium hypochlorite it is fully oxidized after, the product that will obtain
Washing is to neutrality, and dry, grinding is sieved to get the surface coated foam nickel electrode of hydroxy cobalt oxide.Wherein, the secondary chlorine of addition
The amount of the substance of sour sodium is 2 times of cobalt chloride.
Embodiment 2
A kind of surface coated foam nickel electrode of hydroxy cobalt oxide, preparation method includes: that nickel hydroxide is placed in 0.5mol/L
Cobalt chloride solution in, be slowly added dropwise the potassium hydroxide solution of 0.5mol/L under 30 DEG C of stirrings, precipitating completely after be obtained by filtration
Solid is transferred in the potassium hydroxide solution of 7mol/L, be added under 80 DEG C of constant temperature sodium hypochlorite it is fully oxidized after, the production that will obtain
Object is washed to neutrality, dry, and grinding is sieved to get the surface coated foam nickel electrode of hydroxy cobalt oxide.Wherein, time of addition
The amount of the substance of sodium chlorate is 3 times of cobalt chloride.
Embodiment 3
A kind of surface coated foam nickel electrode of hydroxy cobalt oxide, preparation method includes: that nickel hydroxide is placed in 0.3mol/L
Cobalt chloride solution in, be slowly added dropwise the potassium hydroxide solution of 1mol/L under 35 DEG C of stirrings, precipitating completely after be obtained by filtration consolidates
Body is transferred in the potassium hydroxide solution of 6mol/L, be added under 70 DEG C of constant temperature sodium hypochlorite it is fully oxidized after, the product that will obtain
Washing is to neutrality, and dry, grinding is sieved to get the surface coated foam nickel electrode of hydroxy cobalt oxide.Wherein, the secondary chlorine of addition
The amount of the substance of sour sodium is 2 times of cobalt chloride.
Embodiment 4
Using the surface coated foam nickel electrode of hydroxy cobalt oxide made from embodiment 1 ~ 3 as anode, with common alloy anode
Assemble AA type nickel-metal hydride battery, respectively in 0.05C, 0.1C, 0.5C, 1C charge-discharge test, and carry out circulation bend over the desk sweep test and
Mandatory overdischarge storage.Test result shows that the surface coated foam nickel electrode of hydroxy cobalt oxide produced by the present invention assembles
Battery capacity protective rate be up to 98.5%.
Claims (3)
1. a kind of method that chemical oxidization method prepares the surface coated foam nickel electrode of hydroxy cobalt oxide, which is characterized in that the party
Method includes: that nickel hydroxide is placed in the cobalt chloride solution of 0.1 ~ 0.5mol/L, 0.5 is slowly added dropwise under 30 ~ 40 DEG C of stirrings ~
The potassium hydroxide solution of 1mol/L, the solid being obtained by filtration after precipitating is complete are transferred in the potassium hydroxide solution of 5 ~ 7mol/L,
After addition sodium hypochlorite is fully oxidized under 60 ~ 80 DEG C of constant temperature, obtained product is washed to neutrality, it is dry, it grinds, sieving, i.e.,
Obtain the surface coated foam nickel electrode of hydroxy cobalt oxide.
2. the method that chemical oxidization method according to claim 1 prepares the surface coated foam nickel electrode of hydroxy cobalt oxide,
It is characterized in that, the amount of the substance for the sodium hypochlorite being added is 2 ~ 3 times of cobalt chloride.
3. a kind of surface coated foam nickel electrode of hydroxy cobalt oxide, which is characterized in that the surface coated hair of the hydroxy cobalt oxide
Bubble nickel electrode is made by method of any of claims 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710500414.4A CN109148834A (en) | 2017-06-27 | 2017-06-27 | A kind of surface coated foam nickel electrode of hydroxy cobalt oxide and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710500414.4A CN109148834A (en) | 2017-06-27 | 2017-06-27 | A kind of surface coated foam nickel electrode of hydroxy cobalt oxide and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109148834A true CN109148834A (en) | 2019-01-04 |
Family
ID=64805211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710500414.4A Pending CN109148834A (en) | 2017-06-27 | 2017-06-27 | A kind of surface coated foam nickel electrode of hydroxy cobalt oxide and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109148834A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331416A (en) * | 2019-08-09 | 2019-10-15 | 河南大学 | A kind of CoOOH nanometer sheet modification Fe2O3The preparation method and application of complex light anode |
-
2017
- 2017-06-27 CN CN201710500414.4A patent/CN109148834A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331416A (en) * | 2019-08-09 | 2019-10-15 | 河南大学 | A kind of CoOOH nanometer sheet modification Fe2O3The preparation method and application of complex light anode |
| CN110331416B (en) * | 2019-08-09 | 2020-07-24 | 河南大学 | CoOOH nanosheet modified Fe2O3Preparation method and application of composite photo-anode |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190104 |