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Composite carbon material as well as preparation method and application thereof

A technology of composite carbon and carbon layer, applied in nanotechnology for materials and surface science, fuel cell-type half-cell and secondary battery-type half-cell, electrical components, etc., can solve the problem of poor oxygen reduction catalytic performance And other issues

Active Publication Date: 2018-11-13
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The non-precious metal catalysts prepared in the prior art have the problem of poor oxygen reduction catalytic performance

Method used

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  • Composite carbon material as well as preparation method and application thereof
  • Composite carbon material as well as preparation method and application thereof
  • Composite carbon material as well as preparation method and application thereof

Examples

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preparation example Construction

[0037] The invention provides a kind of preparation method of composite carbon material, comprises the following steps:

[0038] (1) Mix transition metal coordination compound, thiourea, ethanol and water to obtain transition metal coordination compound precursor solution, and the transition metal coordination compound is ferric chloride hexahydrate, cobalt chloride hexahydrate or hexahydrate nickel chloride;

[0039] (2) adding the transition metal coordination compound precursor solution obtained in the step (1) dropwise into a hydrophobic organic solvent to obtain a transition metal coordination compound precursor microemulsion;

[0040] (3) NH 2 -MIL-101 (A1) is added to the transition metal coordination compound precursor microemulsion obtained in the step (2) to obtain RTU@NH 2 -MIL-101(A1), R is Fe(III), Co(II) or Ni(II);

[0041] (4) RTU@NH obtained in the step (3) 2 -MIL-101 (A1) is carbonized to obtain a carbonized product;

[0042] (5) After the carbonized prod...

Embodiment 1

[0070] A mixed water-ethanol solution (1 mL, 1:1) containing thiourea (TU, 60 mg) and ferric chloride hexahydrate (60 mg) was slowly added dropwise into n-hexane (60 mL) and vigorously stirred for 1 hour to form a transition Metal complex precursor microemulsion. Then NH 2 - MIL-101(A1) (1 g) was added into the microemulsion and continued to stir for 6 hours. After the stirring was completed, the precipitate was separated by filtration and dried overnight at 60 °C to obtain FeTU@NH 2 -MIL-101(A1), then FeTU@NH 2 -MIL-101(A1) high-purity N in a temperature-programmed furnace 2 Under the atmosphere, carbonize at 900°C for 5 hours, the heating rate is 5°C / min, and then cool to room temperature to obtain a black product, leaching with black product HF (10%), and then washing with a large amount of water. The obtained sample was dried under vacuum and labeled as FeS@G / NSC.

Embodiment 2

[0074] The same as the method of Example 1, the only difference is that ferric chloride hexahydrate is replaced by cobalt dichloride hexahydrate, and the final product obtained is marked as Co 9 S 8 @G / NSC.

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Abstract

The invention provides a preparation method of a composite carbon material, and belongs to the technical field of air fuel cells. A three-dimensional uniformly distributed transition metal complex compound precursor microemulsion is formed by a dual phase encapsulation approach (DPEA) in an MOF (Microsoft Operations Framework) framework, followed by a carbonization process to obtain a composite carbon material, and the obtained composite carbon material uses transition metal sulfide nanoparticles as a core, and a graphitized carbon layer as a shell to form a core-shell composite material; thecore-shell composite material is loaded in a carbon pore structure of a nitrogen-sulfur co-doped graphitized carbon-based structure, and the synergistic effect of the special structure and the core-shell structure composite material exhibits an excellent oxygen reduction catalytic performance.

Description

technical field [0001] The invention relates to the technical field of air fuel cells, in particular to a composite carbon material and its preparation method and application. Background technique [0002] Ever since Phinergy and Alcoa demonstrated an electric car with aluminum (Al) battery technology - capable of driving a distance of about 1000 miles by filling it with water - the technology is practical due to its environmental friendliness, high energy density, low cost, portability and Attention has been drawn to zero emissions. In fact, the sufficient oxygen supply in the cathode comes from the atmosphere, enabling the Al-air battery to show superior performance compared to commercial Li-ion batteries (560 Wh kg -1 ) Higher theoretical specific energy (4140Wh·kg -1 ). However, the slow oxygen reduction reaction (ORR) and its expensive and poorly durable noble metal-based catalysts are the key obstacles to the widespread commercialization of this technology. Therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M12/08B82Y30/00
CPCB82Y30/00H01M4/9083H01M12/08Y02E60/10
Inventor 卢惠民洪清水王俊人曹媛邓燕杨文文许彬彬蔡伟
Owner BEIHANG UNIV
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