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CMK-5 type mesoporous carbon-nano inorganic substance composite material, preparation method and application thereof

A nano-inorganic substance, CMK-5 technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve the effect of promoting cycle stability, stable cycle performance, and small swelling

Inactive Publication Date: 2012-03-21
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dispersion of nanoparticles on the carbon carrier cannot avoid the agglomeration of nano-inorganic nanoparticles during charging and discharging.

Method used

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  • CMK-5 type mesoporous carbon-nano inorganic substance composite material, preparation method and application thereof
  • CMK-5 type mesoporous carbon-nano inorganic substance composite material, preparation method and application thereof
  • CMK-5 type mesoporous carbon-nano inorganic substance composite material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] SnCl 4 ·5H 2 O (1 g, 99%) was dissolved in 1 mL of deionized water to form a solution, and then 0.6 mL of the solution was mixed with 0.2 g of CMK-5 at room temperature and mixed uniformly. After the solution is completely absorbed by CMK-5, place the black powder in a polytetrafluoroethylene bottle filled with ammonia water. The sample is not in direct contact with the ammonia water, and it is placed in a 90℃ oven for heat treatment for 3 hours to hydrolyze the tin oxide precursor in situ . Then wash with water, ethanol, and dry. To increase the load, repeat the above steps once. Finally, under the protection of Ar, the product was heated at a rate of 2°C / min to 300°C for 1 hour, and then heated to 550°C for 3 hours. Get SnO 2 SnO with a mass content of 60wt% 2 CMK-5 composite material, denoted as SnO 2 -60CMK-5.

Embodiment 2

[0034] SnCl 4 ·5H 2 O (1 g, 99%) was dissolved in 1 mL of deionized water to form a solution, and then 0.6 mL of the solution was mixed with 0.2 g of CMK-5 at room temperature and mixed uniformly. After the solution is completely absorbed by CMK-5, place the black powder in a polytetrafluoroethylene bottle filled with ammonia water. The sample is not in direct contact with the ammonia water, and it is placed in a 90℃ oven for heat treatment for 3 hours to hydrolyze the tin oxide precursor in situ . Then wash with water, ethanol, and dry. This immersion-hydrolysis step was repeated twice again. Finally, under the protection of Ar, the product was heated at a rate of 2°C / min to 300°C for 1 hour, and then heated to 550°C for 3 hours. Get SnO 2 SnO with a mass content of 80wt% 2 CMK-5 composite material.

Embodiment 3

[0036] Prepare 1.88mol / L Fe(NO 3 ) 3 ·9H 2 O (98.5%) solution, then take 0.2mL solution and 0.1g CMK-5 at room temperature and stir and mix uniformly. Then put it at 50℃ for 3h, and finally put the product at 5℃min under Ar protection -1 Heat up to 400℃ for 4h. Get γ-Fe 2 O 3 Γ-Fe with a mass content of 23wt% 2 O 3 CMK-5 composite material.

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Abstract

The invention discloses a CMK-5 type mesoporous carbon-nano inorganic substance composite material, a preparation method and application thereof. The composite material is inorganic substance nano particles of 3 to 6 nanometers, wherein the nano particles are uniformly filled in pores of thin-wall ordered tubular mesoporous carbon of a CMK-5 carrier; and the nano inorganic substance is selected from SnO2, Fe2O3, NiO, CuO, Co3O4, Li4Ti5O12, LiFePO4 and S. The CMK-5 type mesoporous carbon is thin-walled, ordered and tubular, and has the wall thickness of 1 to 3 nanometers. The content of the nano inorganic substance in the composite material is 10 to 80 weight percent, the composite material can keep ordered structure, the size of the inorganic substance nano particles can be controlled to be between 3 and 6 nanometers, and the inorganic substance nano particles are uniformly filled between the thin carbon walls of the ordered tubular mesoporous carbon and are not agglomerated. The reversible capacity of the composite material can be maintained between 500 and 1,100 mAh g<-1> under the current density of 200 mA g<-1>, and the capacity is nearly not attenuated after 30 to 100 times of circulation.

Description

Technical field [0001] The invention relates to a preparation method of a lithium ion battery electrode material, in particular to a composite electrode material of different nano-inorganic substances and thin-walled ordered tubular mesoporous carbon and a preparation method thereof, belonging to the technical field of electrochemistry and material synthesis. Background technique [0002] With the wide application and rapid development of various portable electronic devices and electric vehicles, the demand and performance requirements for power batteries have increased sharply. Lithium-ion batteries have become the researcher with their high energy density, long cycle life and good rate capability. Hot spots, but its performance needs to be improved. Countries are racing to develop power-type high-capacity lithium-ion batteries. The capacity of lithium-ion power batteries mainly depends on the positive and negative materials. The high-capacity negative materials are mainly metal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/62B82Y30/00B82Y40/00
CPCY02E60/12Y02E60/10
Inventor 陆安慧李文翠韩飞
Owner DALIAN UNIV OF TECH
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