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Preparation method and product of red blood cell-shaped hollow carbon

A technology of red blood cells and hollow carbon, which is applied in the preparation/purification of carbon, structural parts, electrical components, etc., can solve the problems of high cost, poor cycle stability, low specific capacity of secondary batteries, etc., and achieve the effect of high yield

Active Publication Date: 2019-08-13
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a preparation method and product of red blood cell-like hollow carbon, by using acetylacetonate and nitrogen-containing Pyrrole monomer is used as the reaction precursor, and the red blood cell-like hollow carbon prepared has a novel structure and uniform particle size distribution. Technical issues of low capacity, poor cycle stability and high cost

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  • Preparation method and product of red blood cell-shaped hollow carbon
  • Preparation method and product of red blood cell-shaped hollow carbon
  • Preparation method and product of red blood cell-shaped hollow carbon

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preparation example Construction

[0032] figure 1 It is a flow chart of the preparation method of red blood cell-shaped hollow carbon constructed according to a preferred embodiment of the present invention, such as figure 1 As shown, a method for preparing red blood cell-shaped hollow carbon includes the following steps:

[0033] Step 1: Disperse the initiator in a solvent, the solvent is deionized water or a mixed solution of ethanol and deionized water, stir evenly to obtain the first mixture A;

[0034] Among them, the molar ratio of initiator to solvent is 0.001-20:1, when the molar ratio is 0.1-5:1, the effect is better; the initiator can be an azo initiator (such as azobisisobutyronitrile), H 2 O 2 , Benzoyl, nitric acid, persulfate (such as ammonium persulfate), FeCl 3 One or more of etc;

[0035] Step 2: Add a certain amount of acetylacetonate to the first mixture A and stir evenly to obtain the second mixture B;

[0036] Among them, the concentration of acetylacetonate relative to the solvent is 3g / L~100g / L;...

preparation Embodiment 1

[0049] In the first step, 15ml of concentrated nitric acid was dispersed in 30ml of deionized water and stirred to obtain solution A; in the second step, 0.3g of molybdenum acetylacetonate was added to solution A and stirred in a magnetic stirrer until it was dissolved to obtain solution B; The third step is to add 100ul pyrrole monomer to the solution B, and let it stand at 20°C for 24h, the solid product obtained is centrifuged, washed, and dried to obtain solid C; the fourth step, product C is placed in the tube The carbonization process is carried out in the furnace, and the temperature is raised to 800°C at a heating rate of 1.5°C / min under an argon atmosphere, and the temperature is kept for 2 hours, and then naturally cooled to room temperature, and finally a nitrogen-doped red blood cell-like hollow carbon material is obtained.

[0050] figure 2 It is a scanning electron microscope (SEM) image of the polypyrrole sphere precursor prepared in the preferred embodiment 1 cons...

preparation Embodiment 2

[0052] The first step is to add 10ml of H 2 O 2 Disperse in 200ml of deionized water and stir evenly to obtain solution A; in the second step, add 0.3g of iron acetylacetonate and 0.3g of molybdenum acetylacetonate to solution A, stir in a magnetic stirrer until dissolved, to obtain solution B; In the third step, 200uL pyrrole monomer was added to the solution B and allowed to stand at 30°C for 0.5h. The solid product obtained was centrifuged, washed, and dried to obtain solid C; in the fourth step, product C was placed in a tube furnace Carrying out carbonization treatment, raising to 1400°C at a heating rate of 1°C / min under a nitrogen atmosphere, and keeping the temperature for 1 min, and then naturally cooling to room temperature, finally obtaining a red blood cell-like hollow carbon material.

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Abstract

The invention belongs to the field of carbon materials, and discloses a preparation method and product of red blood cell-shaped hollow carbon. The preparation method comprises the following steps: (a)adding an initiator to a solvent, stirring evenly, then adding acetylacetonate to be stirred and dissolved to form a uniform solution; (b) adding a pyrrole monomer to the obtained solution, cleaningand drying a solid polypyrrole generated in the reaction; (c) heating and keeping the temperature of the dried polypyrrole in the presence of one or a combination of nitrogen, argon, argon-hydrogen, ammonia, H2S, or PH3 to obtain the desired red blood cell-shaped hollow carbon after cooling. The invention also provides an electrode sheet and a secondary battery prepared from the red blood cell-shaped hollow carbon prepared by the preparation method. Through the invention, the obtained carbon material can be prepared in a large scale and is low in price, the secondary battery has high specificcapacity, good cyclic stability, and very broad application prospects.

Description

Technical field [0001] The invention belongs to the field of carbon materials, and more specifically, relates to a preparation method and product of red blood cell-shaped hollow carbon. Background technique [0002] Carbon materials have broad application prospects in many fields due to their special structure and shape, so they have received extensive attention. Compared with carbon materials of other shapes, hollow carbon has the advantages of high strength, low density, large specific surface area, high temperature resistance, acid and alkali resistance, high electrical and thermal conductivity, and abundant internal void space. Therefore, it has advantages in adsorption, carrier, catalysis, storage, etc. The direction of being able to wait has huge development potential. Especially in the direction of secondary battery electrode materials, although traditional graphite materials are cheap and have strong commercial practicability, their theoretical specific capacity is low, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05H01M4/62
CPCH01M4/625Y02E60/10
Inventor 胡先罗刘枭枭
Owner HUAZHONG UNIV OF SCI & TECH
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