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A kind of preparation method of rattan-shaped three-dimensional nanostructured nickel cobaltate material

A three-dimensional nano, nickel cobalt oxide technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of difficult electron transport network channels, the specific surface area needs to be improved, and the electrical conductivity is not very good, so as to improve the reaction speed, excellent electrochemical activity, and the effect of fast charging

Active Publication Date: 2016-05-04
英能基(成都)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the nanostructure form in the above patents, the nickel cobaltate spheres are relatively large, resulting in very small contact surfaces between different nickel cobaltate particles, making it difficult to form efficient electron transport network channels, resulting in poor electrical conductivity, and its Potential to improve specific surface area

Method used

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  • A kind of preparation method of rattan-shaped three-dimensional nanostructured nickel cobaltate material
  • A kind of preparation method of rattan-shaped three-dimensional nanostructured nickel cobaltate material
  • A kind of preparation method of rattan-shaped three-dimensional nanostructured nickel cobaltate material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Prepare 0.1-3mol / L solutions with nickel nitrate and cobalt nitrate respectively.

[0036] 2. Take 5ml and 10ml of the nickel nitrate and cobalt nitrate solutions prepared in step 1, mix them, and magnetically stir them evenly to prepare solution A.

[0037] 3. Then prepare a starch solution of 0.1-20g / L, take 50ml of the solution and drop it into solution A, stir evenly to prepare solution B.

[0038] 4. Add urea into the above mixed liquid B, the concentration range of urea is 0.05-10.0mol / L, and then stir evenly to obtain mixed liquid C.

[0039] 5. Move C into a metal reactor, and react hydrothermally at a temperature of 70-220° C. for 1-36 hours to prepare nickel cobaltate precursor material D.

[0040] 6. Centrifuge D, wash it with deionized water and propanol respectively, and after several times of centrifugal washing, dry it in the air or in a protective gas to obtain the precursor E.

[0041] 7. Heat E to 400°C for 5 hours in an air atmosphere.

Embodiment 2

[0043] 1. Prepare 0.1-3mol / L solutions with nickel nitrate and cobalt nitrate respectively.

[0044] 2. Take 5ml and 10ml of the nickel nitrate and cobalt nitrate solutions prepared in step 1, mix them, and magnetically stir them evenly to prepare solution A.

[0045] 3. Then prepare 0.01-20.0g / L sodium polystyrene sulfonate, take 50ml of the solution and drop it into solution A, stir while dripping, after stirring evenly, make solution B.

[0046] 4. Add urea to the above mixed solution B, the concentration range of urea is 0.05-5.0mol / L, then stir evenly until mixed solution C.

[0047] 5. Move C into a metal reactor, and conduct a hydrothermal reaction at a temperature of 70°C for 36 hours to prepare nickel cobaltate precursor material D.

[0048] 6. Suction filter D, wash with deionized water and propanol respectively, centrifuge and wash several times, and dry to obtain precursor E.

[0049] 7. Heat E to 500°C for 6 hours in an air atmosphere.

Embodiment 3

[0051] 1. Prepare 0.1-3mol / L solutions with nickel nitrate and cobalt nitrate respectively.

[0052] 2. Take 5ml and 10ml of the nickel nitrate and cobalt nitrate solutions prepared in step 1, mix them, and magnetically stir them evenly to prepare solution A.

[0053] 3. Then prepare 0.01-20.0g / L sodium polystyrene sulfonate, take 50ml of the solution and drop it into solution A, stir while dripping, and make solution B after the stirring time is uniform.

[0054] 4. Add urea to the above mixed liquid B, control the concentration range of urea to 0.05-5.5mol / L, and then stir to obtain mixed liquid C.

[0055] 5. Move C into an oil bath, and react in an oil bath at a temperature of 220° C. for 2 hours to prepare nickel cobaltate precursor material D.

[0056] 6. Centrifuge D, wash with deionized water and propanol respectively, and after several times of centrifugal washing, dry to obtain precursor E.

[0057] 7. Heat E to 700°C for 1 hour in an air atmosphere.

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Abstract

The invention discloses a preparation method for a nickel cobaltite material adopting a rattan-shaped three-dimensional nano-structure. The preparation method comprises the following steps: 1) dissolving nickel salt and cobalt salt or hydrates of the nickel salt and the cobalt salt in a water solution according to a nickel-cobalt atomic ratio, and performing uniform stirring to obtain a solution A; 2) adding either starch or sodium polystyrene sulfonate into the solution A to serve as an activator, and performing uniform stirring to obtain a mixed solution B; 3) adding a certain amount of urea into the mixed solution B, performing uniform stirring to obtain a mixed solution B, and transferring the mixed solution B into a reaction kettle; 4) carrying out a hydrothermal reaction, a water-bath reaction or an oil-bath reaction at 70-220 DEG C for a certain period of time to prepare a mixture D; 5) conducting centrifugation or filtration on the mixture D to obtain powder E; 6) washing the powder E for several times with deionized water, ethanol and other nonpolar solvents respectively and sequentially, and performing drying to obtain a material F; 7) heating the material F to 200-700 DEG C, and performing heat preservation for a period of time to obtain a final product, namely the nickel cobaltite material adopting the rattan-shaped three-dimensional nano-structure.

Description

technical field [0001] The invention specifically relates to a preparation process of a three-dimensional nanostructured nickel cobaltate material with a high surface area used in the field of electrochemistry and sensors. Background technique [0002] Spinel nickel cobaltate material has stable structure, good electrical conductivity, chemical activity, magnetic properties and other physical properties, and it is a research hotspot in the field of materials at present. In particular, in recent years, the research on the electrochemical properties and applications of nickel cobalt oxide based spinel materials has become more and more popular. Studies have found that nickel cobaltate can not only be used as an oxide electrode material, a catalyst for some complex reactions such as alkane oxidation, ammonia oxidation, and can be made into a highly selective CO sensor, but also widely used in electrocatalysis, magnetic hyperthermia, etc. . [0003] There are many preparation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/00B82Y30/00
Inventor 陈泽祥张继君王艳李海
Owner 英能基(成都)科技有限公司
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