CN1634769A - Method for preparing hydroxyl nickel oxide - Google Patents
Method for preparing hydroxyl nickel oxide Download PDFInfo
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- CN1634769A CN1634769A CN 200310112987 CN200310112987A CN1634769A CN 1634769 A CN1634769 A CN 1634769A CN 200310112987 CN200310112987 CN 200310112987 CN 200310112987 A CN200310112987 A CN 200310112987A CN 1634769 A CN1634769 A CN 1634769A
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- nickel oxyhydroxide
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- nickel
- nickel oxide
- oxyhydroxide
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Abstract
The invention discloses a process for preparing gamma-type nickel oxyhydroxide, which comprises oxidizing nickel hydroxide with sodium hypochlorite as oxidant, ageing in alkali solution, cleaning and drying to obtain nickel oxyhydroxide, wherein the nickel oxyhydroxide is gamma-type, has stable structure and high electrochemical activity, and is especially suitable for positive electrode active material of alkaline zinc-manganese battery.
Description
Technical Field
The invention relates to a method for manufacturing nickel oxyhydroxide (NiOOH), in particular to a method for manufacturing gamma-type nickel oxyhydroxide, belonging to the field of battery manufacturing.
Background
In recent years, small portable electronic devices, particularly electronic products such as digital cameras, digital video cameras, portable game machines, electric toys, etc., which generally utilize high operating voltages and require large currents, among the batteries satisfying the above requirements, alkaline zinc-manganese batteries have been widely used, and various improvements have been made from battery materials to battery manufacturing in order to further improve discharge performance under large loads, however, manganese dioxide (MnO) is contained 2 ) Positive electrode of (2)The active material is discharged based on the elemental solid-phase chemical reaction, and the voltage is gradually decreased as a result of the discharge, thereby drawing a downward-sloping discharge curve 1, because of which the discharge performance of the alkaline zinc-manganese battery is fundamentally difficult to satisfy practical application in a small-sized portable electronic device requiring high voltage and large current.
In order to solve the problem of the need for a method for producing nickel oxyhydroxide, the relevant manufacturers have tried to solve the problem without paying attention, but no suitable method has been developed for a long time, and a general production method has not been a suitable method for solving the above problem, which is obviously a problem to be solved urgently.
In view of the above-mentioned shortcomings of the conventional method for producing nickel oxyhydroxide, the present inventors have conducted extensive research and innovation based on practical experience and professional knowledge that has been abundant for many years in designing and manufacturing such products, and have made a new method capable of improving the conventional method for producing nickel oxyhydroxide to make it more practical. After continuous research and design and repeated tests and improvements, the invention with practical value is finally created.
Disclosure of Invention
The invention mainly aims to provide a novel manufacturing method of nickel oxyhydroxide on the basis of fusing materials of an alkaline zinc-manganese battery and a nickel-hydrogen rechargeable battery, so that the battery manufactured by the nickel oxyhydroxide processed by the method has higher discharge voltage and remarkable current discharge performance, and can keep higher output power for a long time.
Another object of the present invention is to provide a novel method for producing nickel oxyhydroxide, which uses a mixture of nickel oxyhydroxide and manganese dioxide as a positive electrode active material to produce a high-power alkaline battery.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for preparing nickel oxyhydroxide, which comprises the following steps,
step 3, carrying out suction filtration and cleaning on the product which is completely reacted;
step 4, placing the product in a KOH aqueous solution with the concentration of 40 percent, stirring and aging for 24 hours;
and 5, performing suction filtration, washing and drying on the aged product, and sieving the product with a 150-mesh sieve.
In the above-mentioned method for producing nickel oxyhydroxide, the bulk density of nickel oxyhydroxide is 2.25 to 2.45g/cm 3 Meanwhile, the discharge capacity is 150mAh/g or more at a large current (1C rate).
In the method for preparing nickel oxyhydroxide, the crystal structure of the obtained nickel oxyhydroxide is gamma-type.
Compared with the prior art, the method has obvious advantages and beneficial effects.
The hydroxyl nickel oxide with the gamma-type structure manufactured by the invention overcomes the problems that the hydroxyl nickel oxide used as the positive active material in the prior art is easy to generate oxygen and self-discharge in large quantity, and the hydroxyl nickel oxide with high electrochemical activity and high stability is produced, so that the hydroxyl nickel oxide has higher discharge voltage and obvious current discharge performance, can keep higher output power for a long time, and has the stacking density of 2.25-2.45g/cm 3 Meanwhile, the discharge capacity of the sample at a large current (1C rate) is 150mAh/g or more, which is shown by the test using the three-electrode system, and exceeds the value disclosed in patent document No. CN1320977A (Nippon Sony corporation) published on 11.7.11.2001. The nickel oxyhydroxide has a large current discharge capacity (continuous discharge) ratio to manganese dioxide in comparison with a manganese dioxide electrode prepared under the same conditionsThe electrode is more than one time higher, and the discharge curve of the hydroxyl nickel oxide is flat 2, which is 0.2-0.3V higher than that of the manganese dioxide electrode.
Drawings
FIG. 1 is a flow chart of the present invention.
FIG. 2 is a schematic diagram of the test performance of the samples prepared according to the present invention.
Detailed Description
Referring to FIG. 1, a flow chart of the present invention is shown, and a method for producing nickel oxyhydroxide is as follows: oxidizing nickel hydroxide with sodium hypochlorite serving as an oxidant, and stirring and reacting at the temperature of 30 ℃ for more than 12 hours; carrying out suction filtration and cleaning on the oxidized product; putting the cleaned product into 40% KOH aqueous solution, stirring and aging for 24 hours; and filtering, washing and drying the aged product again, and sieving the product through a 150-mesh sieve. The bulk density of the nickel oxyhydroxide is 2.25 to 2.45g/cm 3 And the discharge capacity at large current (1C rate) is more than 150mAh/g, and the obtained crystal structure is gamma-type.
The test performance of the nickel oxyhydroxide produced by the present invention is shown in fig. 2.
Finally, it should be noted that: while the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (3)
1. A method for producing nickel oxyhydroxide, characterized by comprising:
step 1, oxidizing nickel hydroxide by using an oxidant sodium hypochlorite;
step 2, stirring and reacting for more than 12 hours at the temperature of 30 ℃;
step 3, carrying out suction filtration and cleaning on a product which is completely reacted;
step 4, placing the product in 40% KOH aqueous solution, stirring and aging for 24 hours;
and 5, performing suction filtration, washing and drying on the aged product, and sieving the product with a 150-mesh sieve.
2. The method of claim 1, wherein the nickel oxyhydroxide has a bulk density of 2.25 to 2.45g/cm 3 And a discharge capacity at a large current (1C rate) of 150mAh/g or more.
3. The method for producing nickel oxyhydroxide according to claim 1, wherein: the crystal structure of the obtained hydroxyl nickel oxide is gamma type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310112987 CN1634769A (en) | 2003-12-26 | 2003-12-26 | Method for preparing hydroxyl nickel oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310112987 CN1634769A (en) | 2003-12-26 | 2003-12-26 | Method for preparing hydroxyl nickel oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1634769A true CN1634769A (en) | 2005-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310112987 Pending CN1634769A (en) | 2003-12-26 | 2003-12-26 | Method for preparing hydroxyl nickel oxide |
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| Country | Link |
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| CN (1) | CN1634769A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158408A (en) * | 2016-07-25 | 2016-11-23 | 合肥工业大学 | A kind of NiOOH@CuO/Cu2o composite nano plate array film and its preparation method and application |
| CN115893529A (en) * | 2022-11-24 | 2023-04-04 | 福建南平南孚电池有限公司 | Preparation method of nickel oxyhydroxide, prepared nickel oxyhydroxide and application |
-
2003
- 2003-12-26 CN CN 200310112987 patent/CN1634769A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158408A (en) * | 2016-07-25 | 2016-11-23 | 合肥工业大学 | A kind of NiOOH@CuO/Cu2o composite nano plate array film and its preparation method and application |
| CN106158408B (en) * | 2016-07-25 | 2018-06-19 | 合肥工业大学 | A kind of NiOOH@CuO/Cu2O composite nano plate array films and its preparation method and application |
| CN115893529A (en) * | 2022-11-24 | 2023-04-04 | 福建南平南孚电池有限公司 | Preparation method of nickel oxyhydroxide, prepared nickel oxyhydroxide and application |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |