Method for preparing carbide-derived carbon from molten sodium carbonate at high temperature

A carbide-derived carbon and sodium carbonate technology, which is applied in the manufacture of hybrid/electric double layer capacitors, structural parts, electrical components, etc., can solve the problems of complex devices and high energy consumption, and achieve high safety, low preparation costs, and environmental protection. The effect of little pollution

Active Publication Date: 2016-11-09
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method consumes a lot of energy and is complex

Method used

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  • Method for preparing carbide-derived carbon from molten sodium carbonate at high temperature
  • Method for preparing carbide-derived carbon from molten sodium carbonate at high temperature
  • Method for preparing carbide-derived carbon from molten sodium carbonate at high temperature

Examples

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Effect test

Embodiment 1

[0035] 2g Ti 3 AlC 2 Mix homogeneously with 6g of anhydrous sodium carbonate, fill in a nickel boat and place it in the center of a tube furnace, heat up to 500°C under nitrogen protection, and keep 500°C for 10h. After the material was naturally cooled to room temperature, the calcined product was dissolved in 3M HCl and reacted at room temperature (20±5°C) for 2 h. The reaction product was suction-filtered, washed with water until neutral, and dried at 120°C to obtain a carbide-derived carbon material. The XRD curve of the obtained carbide-derived carbon is as follows figure 1 It can be seen from the test that a carbide-derived carbon material is prepared by the above method. The scanning electron microscope of the obtained carbon material is as follows figure 2 As shown, the carbon material has a graphene-like two-dimensional layered structure. The Raman spectrum of the resulting carbide-derived carbon is shown in image 3 As shown, the obvious 2D peak indicates that...

Embodiment 2

[0037] 2g Ti 3 SiC 2 Mix evenly with 20g of anhydrous sodium carbonate, put it in a nickel boat and place it in the center of the tube furnace, heat up to 880°C under the protection of argon, and keep it warm for 5h. The calcined product was dissolved in 5M HCl and reacted at room temperature for 2 h. The reaction product was suction-filtered, washed with water until neutral, and dried at 120°C to obtain a carbide-derived carbon material. The scanning electron microscope picture of the obtained carbide-derived carbon material is as follows Figure 6 As shown, it indicates that a two-dimensional layered material was prepared. The carbide-derived carbon is used as an electrode material for supercapacitors. The mass specific capacitance is 220 F / g in 6mol / L KOH electrolyte, and the capacity remains 91% after 10,000 cycles.

Embodiment 3

[0039] 1g Ti 2 AlC and 20g of anhydrous sodium carbonate were mixed evenly and placed in a nickel boat. The nickel boat was placed in a tube furnace, and the temperature was raised to 1000°C under the protection of nitrogen and argon mixed gas (volume ratio 1:1), and kept for 1h. The calcined product was dissolved in 3M HCl and reacted at room temperature for 2 h. The reaction product was suction-filtered, washed with water until neutral, and dried at 120°C to obtain a carbide-derived carbon material.

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Abstract

The invention discloses a method for preparing carbide-derived carbon from molten sodium carbonate at a high temperature and belongs to the technical field of carbon materials. Transition metal carbides and solid-phase sodium carbonate are mixed, high-temperature calcination is conducted at 500-1000 DEG C under the protection of inert gases, metal impurities are washed off with hydrochloric acid, and suction filtration and washing are conducted to obtain the carbide-derived carbon. The preparing process is simple, operation is convenient, pollution to the environment is small, control is easy, and the prepared carbon material has a two-dimensional layered structure like graphene.

Description

technical field [0001] The invention relates to a method for preparing carbide-derived carbon by melting sodium carbonate at high temperature, and belongs to the technical field of carbon materials. Background technique [0002] Carbide-derived carbon is a new type of carbon material obtained by removing the metal atoms in the lattice and leaving the skeleton carbon structure with carbide as the precursor. Due to the advantages of good electrical conductivity, high specific surface area, and adjustable pore size distribution, carbide-derived carbons have unique application advantages in the fields of supercapacitor electrode materials, water treatment, catalyst supports, and gas storage. [0003] At present, the methods for preparing carbide-derived carbon mainly include high-temperature halogenation, supercritical water filtration, and vacuum pyrolysis (Encyclopedia of Nanoscience and Nanotechnology, 2004, 10, 1-22). Supercritical water filtration and vacuum pyrolysis have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02H01M4/583H01M4/133H01M4/1393H01G11/32H01G11/86
CPCC01P2002/72C01P2002/82C01P2004/03C01P2004/20H01G11/32H01G11/86H01M4/133H01M4/1393H01M4/583Y02E60/10
Inventor 徐斌李婷婷贾梦秋
Owner BEIJING UNIV OF CHEM TECH
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