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Composite material with electrocatalytic oxygen reduction performance, preparation method thereof and use thereof

A composite material, electrocatalytic oxygen technology, applied in the direction of circuits, electrical components, battery electrodes, etc., can solve the problems that hinder the promotion and application of fuel cells, high cost of fuel cells, loss of reducibility, etc., and achieve high-efficiency electrocatalytic oxygen reduction performance , low cost, and the effect of improving electrical conductivity

Active Publication Date: 2019-07-12
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the main electrocatalyst used in fuel cells is platinum, which is widely used in fuel cells due to its good oxygen reduction activity and durability, but because the surface of Pt is easily combined with CO, CO will cause Pt to be poisoned and lose its Reducibility, and as a precious metal, platinum metal is precious and rare, and the utilization rate is extremely low, which makes the cost of fuel cells high, which largely hinders the promotion and application of fuel cells

Method used

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  • Composite material with electrocatalytic oxygen reduction performance, preparation method thereof and use thereof
  • Composite material with electrocatalytic oxygen reduction performance, preparation method thereof and use thereof
  • Composite material with electrocatalytic oxygen reduction performance, preparation method thereof and use thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0082] A BN / Ni / CNT composite material, in which metal Ni is evenly attached between BN sheets and on the surface of the sheets, and CNT fixes Ni and BN to form a spherical structure with a particle size of 100-300nm. Among them, the molar ratio of BN, Ni and CNT is 1:2:1.

[0083] Its preparation method comprises the following steps:

[0084] (1) Add 0.005mol carbon nanotube (CNT) and 0.005mol boron nitride (BN) into 50mL of ethylene glycol, and ultrasonically disperse for 30min;

[0085] (2) Add 0.01mol NiCl under stirring 2 ·6H 2 0, 0.06mol urea, continue to stir for 10min, fully dissolve the solid and make the solution mix uniformly;

[0086](3) After standing for 20 minutes, the reaction system was heated and refluxed for 6 hours. After the reaction, it was cooled to room temperature, and the solid was washed with double distilled water and ethanol, respectively, and washed 3 times respectively, wherein the speed of the centrifuge was 8000r / min. , and centrifuge for 5 ...

Embodiment 2

[0091] The preparation method of the BN / Ni / CNT composite material in this example is the same as that of Example 1, and the difference from Example 1 is that step (3) is heated under reflux for 8 hours. The structure of the obtained material is similar to Example 1.

Embodiment 3

[0093] A BN / Fe / CNT composite material, in which metal Fe is evenly attached between BN sheets and on the surface of the sheets, and CNT fixes Fe and BN to form a spherical structure with a particle size of 100-300nm. Among them, the molar ratio of BN, Fe and CNT is 1:2:1. Its preparation method comprises the following steps:

[0094] (1) Add 0.005mol carbon nanotube (CNT) and 0.005mol boron nitride (BN) into 50mL of ethylene glycol, and ultrasonically disperse for 30min;

[0095] (2) Add 0.01mol FeCl under stirring 3 ·6H 2 0, 0.06mol urea, continue to stir for 10min, fully dissolve the solid and make the solution mix uniformly;

[0096] (3) After standing for 20 minutes, the reaction system was heated and refluxed for 6 hours. After the reaction, it was cooled to room temperature, and the solid was washed with double distilled water and ethanol, respectively, and washed 3 times respectively, wherein the speed of the centrifuge was 8000r / min. , and centrifuge for 5 minutes....

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Abstract

The invention discloses a composite material with electrocatalytic oxygen reduction performance, a preparation method thereof and use thereof and belongs to the technical field of electrocatalytic materials. Metal in the composite material is uniformly attached between BN sheets and the surface of the sheets, and CNT fixes the metal and BN. The composite material with electrocatalytic oxygen reduction performance provided by the invention has high electrocatalytic oxygen reduction performance and stable cycle performance. The cost of raw materials adopted by the preparation method of the invention is relatively low, the overall reaction condition is mild, the post-treatment is simple, the energy consumption is small, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic materials, and in particular relates to a composite material with electrocatalytic oxygen reduction performance, a preparation method and application thereof. Background technique [0002] As the driving force of social progress and the basis of production activities, energy plays a very important role in human life. The development and utilization of energy has greatly promoted the development of the world economy and human society. With the increasing demand for energy in modern life, the energy crisis has become increasingly prominent, and environmental pollution has become increasingly serious. Compared with traditional energy sources, the obvious advantage of fuel cells is that no harmful gases are produced in the whole process, which can alleviate the current situation of air pollution. It is a kind of green and clean energy that we have been looking for. [0003] The cathode oxyge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/90
CPCH01M4/8647H01M4/9041H01M4/9075Y02E60/50
Inventor 于洁玫黄太仲刘宗明姜占坤齐蕾
Owner UNIV OF JINAN
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