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Preparation method of iron selenide/carbon composite material

A technology of carbon composite materials and iron selenide, which is applied in the field of ceramics, can solve problems such as increased dependence and resource shortage, and achieve the effects of enhanced electrical conductivity, faster charge transfer speed, and simple operation

Active Publication Date: 2019-06-18
MONALISA GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, lithium-ion batteries are the high-energy battery system with the best development prospects, but as the digital, traffic digital and other industries rely more heavily on lithium-ion batteries, lithium will face a serious shortage of resources

Method used

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  • Preparation method of iron selenide/carbon composite material
  • Preparation method of iron selenide/carbon composite material
  • Preparation method of iron selenide/carbon composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Disperse dopamine hydrochloride and ferric ammonium oxalate in isopropanol solution at a mass ratio of 3:1, stir on a magnetic stirrer at a speed of 200r / min for 24 hours to mix evenly to dissolve dopamine hydrochloride, keep ferric ammonium oxalate insoluble, and obtain a light green color The suspension was filtered by suction and evaporated to dryness to obtain light green powder A1.

[0056] Heat the powder A1 in a low-temperature tube furnace at a vacuum degree (about -0.1MPa) from room temperature at 10°C / min to 600°C for 1 hour to obtain iron oxide / carbon precursor powder Body B1.

[0057] The product B1 and selenium powder were weighed according to the mass ratio of 1:2, the product B1 and selenium powder were ground and placed in a crucible, put into a tube furnace and vacuumed (the pressure gauge was about -0.1MPa), at 5°C / min The heating rate was increased from room temperature to 600°C, and the temperature was kept for 1 hour. After the heat preservation wa...

Embodiment 2

[0060] Disperse dopamine hydrochloride and ferric ammonium citrate in isopropanol solution at a mass ratio of 5:1, stir on a magnetic stirrer for 18 hours and mix evenly to obtain a light green suspension. The solution is filtered by suction and evaporated to dryness to obtain a light green powder Body A2.

[0061] Heat the powder A2 to 700°C for 1 hour from room temperature at 15°C / min in a low-temperature tube furnace under the condition of a vacuum degree (the pressure gauge is about -0.08MPa) to obtain Fe 3 o 4 / C precursor powder B2.

[0062] The product B2 and selenium powder were weighed according to the mass ratio of 1:3, the product B and the selenium powder were ground and placed in a crucible, put into a tube furnace and vacuumed (the pressure gauge was about -0.08MPa), at 7°C / min The heating rate was increased from room temperature to 700°C, and the temperature was kept for 1 hour. After the heat preservation was completed, argon gas was added to make the pressur...

Embodiment 3

[0065] Disperse ferric oxalate and dopamine hydrochloride in isopropanol solution at a mass ratio of 8:1, stir on a magnetic stirrer for 24 hours and mix evenly to obtain a light green suspension. The solution is filtered by suction and evaporated to dryness to obtain a light green powder A3 .

[0066] The powder A3 is heated in a low-temperature tube furnace at a vacuum degree (about -0.06MPa on the pressure gauge) from room temperature at 7°C / min to 500°C for 1 hour to obtain Fe 3 o 4 / C precursor powder B3.

[0067] The product B3 and selenium powder were weighed according to the mass ratio of 1:5, the product B3 and selenium powder were ground and placed in a crucible, put into a tube furnace and vacuumed (the pressure gauge was about -0.07MPa), at 15°C / min The heating rate was increased from room temperature to 900°C, and the temperature was kept for 1 hour. After the heat preservation was completed, argon gas was added to make the pressure in the tube zero. The layere...

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Abstract

The invention relates to a preparation method of an iron selenide / carbon composite material. The preparation method comprises the steps that (1) a dopamine source and an iron source are added into a solvent in which the dopamine source is dissolved and the iron source is not dissolved, the solvent is removed after uniform mixing, and powder A is obtained; (2) the powder A is subject to pyrolysis under the temperature of 400-700 DEG C in vacuum, and powder B is obtained; and (3) the powder B is mixed with selenium powder, the mixture is subject to pyrolysis under the temperature of 600-900 DEGC, and the iron selenide / carbon composite material is obtained.

Description

technical field [0001] The invention belongs to the technical field of ceramics, and in particular relates to an iron selenide / carbon composite functional ceramic and a preparation method for preparing the iron selenide / carbon composite functional ceramic by in-situ coating of a precursor. Background technique [0002] At present, lithium-ion batteries are the high-energy battery system with the best development prospects. However, with the increasing dependence of digital and traffic digital industries on lithium-ion batteries, lithium will face a serious shortage of resources. The research and development of Na-ion batteries can alleviate to some extent the limited development of batteries due to the shortage of lithium resources. If an electrode material with excellent battery performance, safety and stability is developed on this basis, sodium-ion batteries will have a greater market competitive advantage than lithium-ion batteries. As a type of metal sulfide, metal sel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCY02E60/10
Inventor 刘一军欧阳海波黄玲艳潘利敏黄剑锋李嘉胤
Owner MONALISA GRP CO LTD
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