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Preparation method of three-dimensional graphene network structure supported Prussian blue analog

A Prussian blue and network structure technology, which is applied in the field of three-dimensional graphene network structure loaded Prussian blue analog materials and its preparation, can solve the problems of easy agglomeration and poor dispersion performance, and achieve uniform material structure, good dispersibility, and strong control effect

Inactive Publication Date: 2019-02-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, carbon materials such as multi-walled carbon nanotubes (one-dimensional materials) and graphene (two-dimensional materials) often have the problem of poor dispersion and easy agglomeration.

Method used

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  • Preparation method of three-dimensional graphene network structure supported Prussian blue analog
  • Preparation method of three-dimensional graphene network structure supported Prussian blue analog
  • Preparation method of three-dimensional graphene network structure supported Prussian blue analog

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 1.25g glucose, 1.25g urea and 20g NaCl, dissolve the mixture in 60ml of deionized water, stir and dissolve with a magnetic stirrer at a stirring speed of 300r / min to form a solution, and then sonicate with a 400W ultrasonic device 15min, mix well. Put the mixed solution in the refrigerator to freeze overnight, and then place it in a freeze dryer to dry under vacuum at -50°C until the mixture is dried. Grind the mixture, take 10g of the mixed powder and put it in the ark, put the ark in the tube furnace, pass through 200ml / min of Ar inert gas for 30min to remove the air, and then use 200ml / min of H 2 It is used as a carrier gas, and the temperature is raised to 750°C at a heating rate of 10°C / min, and the temperature is kept for 2 hours for carbonization reaction. After the reaction is completed, it is cooled to room temperature under the protection of Ar atmosphere to obtain a calcined product. Collect the calcined product, grind it finely, wash it with water unt...

Embodiment 2

[0031]Weigh 1.25g glucose, 1.25g urea and 20g NaCl, dissolve the mixture in 60ml of deionized water, stir and dissolve with a magnetic stirrer at a stirring speed of 300r / min to form a solution, and then sonicate with a 400W ultrasonic device 15min, mix well. Put the mixed solution in the refrigerator to freeze overnight, and then place it in a freeze dryer to dry under vacuum at -50°C until the mixture is dried. Grind the mixture, take 6g of the mixed powder and place it in the ark, put the ark in the tube furnace, pass through 200ml / min of Ar inert gas for 30min to remove the air, and then use 200ml / min of H 2 It is used as a carrier gas, and the temperature is raised to 700°C at a heating rate of 10°C / min, and the temperature is kept for 4 hours for carbonization reaction. After the reaction is completed, it is cooled to room temperature under the protection of Ar atmosphere to obtain a calcined product. The calcined product was collected, ground finely, washed with water ...

Embodiment 3

[0033] Weigh 1.25g citric acid, 1.25g urea and 20g NaCl, dissolve the mixture in 60ml of deionized water, stir and dissolve to form a solution with a magnetic stirrer with a stirring speed of 300r / min, and then use a 400W ultrasonic Sonicate for 15 minutes and mix well. Put the mixed solution in the refrigerator to freeze overnight, and then place it in a freeze dryer to dry under vacuum at -50°C until the mixture is dried. Grind the mixture, take 6g of the mixed powder and place it in the ark, put the ark in the tube furnace, pass through 200ml / min of Ar inert gas for 30min to remove the air, and then use 200ml / min of H 2 It is used as a carrier gas, and the temperature is raised to 750°C at a heating rate of 10°C / min, and the temperature is kept for 4 hours for carbonization reaction. After the reaction is completed, it is cooled to room temperature under the protection of Ar atmosphere to obtain a calcined product. The calcined product was collected, ground finely, washed ...

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Abstract

The invention relates to a preparation method of a three-dimensional graphene network structure supported Prussian blue analog material, The preparation method comprises the following steps: dissolving a carbon source, a nitrogen source and NaCl in deionized water, and performing vacuum drying at 50 DEG C in a freeze dryer to obtain a mixture; grinding the mixture into a powder, spreading the powder in an ark, and placing the ark in a constant temperature zone of a tube furnace for calcination; obtaining a three-dimensional graphene network structure material, dissolving the three-dimensionalgraphene network material in deionized water, and stirring uniformly to obtain a mixed solution; adding potassium ferrocyanide / sodium ferrocyanide to the mixed solution, adding sodium chloride / sodium citrate to the mixed solution to form a saturated solution of sodium chloride / sodium citrate, and adding MnCl2 dropwise to form a suspension; and obtaining the three-dimensional graphene network structure supported Prussian blue analog material. The prepared composite material is applied to anodes of sodium ion batteries.

Description

technical field [0001] The invention relates to a three-dimensional graphene network structure loaded Prussian blue analog material and a preparation process thereof, belonging to the field of positive electrode materials for sodium ion batteries. Background technique [0002] In today's society, due to the limited reserves of fuel energy such as coal and oil and the certain impact of the combustion process on the environment, the status of clean energy is becoming more and more important. Common new energy sources include solar energy, tidal energy, and wind energy, but these energy sources are often discontinuous and unstable. To solve this problem, these energy sources need to be stored and then utilized. [0003] Lithium-ion batteries are currently the most widely researched energy storage devices because of their advantages such as high energy density and long life, but the use of large-scale energy storage batteries in the future will cause a shortage of lithium resour...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054B82Y30/00
CPCB82Y30/00H01M4/366H01M4/58H01M4/625H01M10/054H01M2004/021H01M2004/028Y02E60/10
Inventor 赵乃勤毛乐佳刘恩佐马丽颖沙军威
Owner TIANJIN UNIV
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