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Carbon coated ZnO nanowire, and preparation method and application thereof

A nanowire, carbon-coated technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of shortening battery life, producing zinc dendrites, and deforming zinc electrodes. Effects of avoiding the use of binders, good mechanical properties, excellent cycle performance

Active Publication Date: 2018-04-06
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, during the charging and discharging process of Zn-Co batteries, the zinc electrodes in the alkaline electrolyte environment will dissolve and deform, and even produce zinc dendrites, which will greatly shorten the service life of the battery.

Method used

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  • Carbon coated ZnO nanowire, and preparation method and application thereof
  • Carbon coated ZnO nanowire, and preparation method and application thereof
  • Carbon coated ZnO nanowire, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method for carbon-coated zinc oxide connecting nanowire material, which comprises the following steps:

[0041] 1) 10.5mmol hexamethylenetetramine, 10.5mmol Zn(NO 3 ) 3 ·6H 2 O was added to 50.0mL deionized water, and magnetically stirred at 25°C to dissolve it completely, forming a uniform and transparent solution.

[0042] 2) Add 5.25ml of ammonia water dropwise to the solution obtained in step 1), stir while adding, and adjust the pH to 10,

[0043] 3) Transfer the solution obtained in step 2) into a 100ml reaction kettle, and put in a 3*3cm 2 carbon cloth,

[0044] 4) Put the reaction kettle into an oven at 90°C, keep it warm for 24 hours, take out the carbon cloth, rinse it repeatedly with deionized water and alcohol, and then put it in an oven at 70°C for one night.

[0045] 5) Put the carbon cloth obtained in step 4) into a glass dish, spread a certain amount of dimethylimidazole on the bottom of the glass dish, cover and seal the reaction dish...

Embodiment 2

[0055] A preparation method for carbon-coated zinc oxide connecting nanowire material, which comprises the following steps:

[0056] 1) 15mmol hexamethylenetetramine, 15mmol Zn(NO 3 ) 3 ·6H 2 O was added to 50.0mL deionized water, and magnetically stirred at 25°C to dissolve it completely, forming a uniform and transparent solution;

[0057] 2) Add 6.6ml of ammonia water dropwise to the solution obtained in step 1), stir while adding, adjust the pH to 9.5,

[0058] 3) Transfer the solution obtained in step 2) into a 100ml reaction kettle, and put a 3*3cm 2 carbon cloth,

[0059] 4) Put the reaction kettle into an oven at 90°C, keep it warm for 24 hours, take out the carbon cloth, rinse it repeatedly with deionized water and alcohol, and then put it in an oven at 70°C for one night.

[0060] 5) Put the carbon cloth obtained in step 4) into a glass dish, and spread a certain amount of dimethylimidazole on the bottom of the glass dish, cover and seal the reaction dish, and m...

Embodiment 3

[0064] 1) 7.5mmol hexamethylenetetramine, 7.5mmol Zn(NO 3 ) 3 ·6H 2 O was added to 50.0mL deionized water, and magnetically stirred at 25°C to dissolve it completely, forming a uniform and transparent solution;

[0065] 2) Add 4.5ml of ammonia water dropwise to the solution obtained in step 1), stir while adding, adjust the pH to 8,

[0066] 3) Transfer the solution obtained in step 2) into a 100ml reaction kettle, and put a 3*3cm 2 carbon cloth,

[0067] 4) Put the reaction kettle into an oven at 90°C, keep it warm for 15 hours, take out the carbon cloth, rinse it repeatedly with deionized water and alcohol, and then put it in an oven at 70°C for one night.

[0068] 5) Put the carbon cloth obtained in step 4) into a glass dish, spread a certain amount of dimethylimidazole on the bottom of the glass dish, cover and seal the reaction dish, and move it into a vacuum oven at 90°C for heating for 3 hours.

[0069] 6) the carbon of step 5) is placed in the tube furnace, under ...

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Abstract

The invention belongs to the field of nanomaterials and electrochemical energy storage, and particularly relates to a carbon coated ZnO nanowire and a preparation method thereof. The ZnO nanowire canbe used as a negative electrode material of a Zn-Co battery, the ZnO nanowire has a carbon particle coated ZnO nanowire structure which has a degree of graphitization and is formed by high temperaturepyrolysis of a metal organic frame structure (ZIF-8) and the ZnO nanowire after being compounded on carbon cloth, the diameter of the ZnO nanowire is 300-500nm, the length of the ZnO nanowire is 8-10micrometers, and the carbon particle coating thickness is 10-30nm. A hydrothermal method is combined with a low pressure gas phase deposition method to synthesize an electrode with good mechanical properties and flexibility, porous carbon carbon-coated ZnO is formed by the pyrolysis of ZIF-8 to inhibit the dissolution and deformation of the negative electrode so as to improve the cycle performance, and excellent cycle performance of the Zn-Co battery is achieved at last.

Description

technical field [0001] The invention belongs to the field of nanomaterials and electrochemical energy storage, and in particular relates to carbon-coated ZnO nanowires and a preparation method thereof, which can be used as negative electrode materials for Zn-Co batteries. Background technique [0002] With the continuous consumption of fossil energy, people's demand for renewable clean energy is increasing. Vigorously developing electrochemical energy storage devices with high energy density, high power density, environmental friendliness and low price has become an effective means to solve this energy crisis. Lithium-ion batteries are widely used in many fields because of their high energy density, but because of the flammability of organic electrolytes, the price of metal lithium is relatively high, which limits the use of lithium-ion batteries to a certain extent. Therefore, the development of secondary batteries with high energy density, long cycle life, high safety, en...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/36B82Y30/00
CPCB82Y30/00H01M4/366H01M4/48H01M4/628H01M10/36H01M2004/021H01M2004/027Y02E60/10
Inventor 韩春华李明孟甲申韩康
Owner WUHAN UNIV OF TECH
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