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Carbon material with oxygen reduction activity and nitrogen-sulfur co-doped cauliflower-like structure, oxygen reduction electrode, preparation method and fuel cell

A nitrogen-sulfur co-doping, carbon material technology, used in carbon preparation/purification, structural parts, battery electrodes, etc. The effect of excellent performance, good electrochemical performance, huge application potential and industrial value

Active Publication Date: 2019-12-10
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the synthesis process of this type of material is relatively complicated, the synthesis conditions are relatively strict, and it is difficult to produce on a large scale. In addition, its electrochemical performance needs to be further improved

Method used

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  • Carbon material with oxygen reduction activity and nitrogen-sulfur co-doped cauliflower-like structure, oxygen reduction electrode, preparation method and fuel cell
  • Carbon material with oxygen reduction activity and nitrogen-sulfur co-doped cauliflower-like structure, oxygen reduction electrode, preparation method and fuel cell
  • Carbon material with oxygen reduction activity and nitrogen-sulfur co-doped cauliflower-like structure, oxygen reduction electrode, preparation method and fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] S1: React hexachlorobutadiene, tellurium diethyldithiocarbamate, and cyclohexanone in a polytetrafluoroethylene-lined autoclave at 140°C and 1.5MPa for 2 hours, wherein diethyl The mass ratio of tellurium diethyldithiocarbamate and hexachlorobutadiene is 1:273, and the mol ratio of tellurium diethyldithiocarbamate and cyclohexanone is 1:3872;

[0074] S2: After the reaction, the pressure was released to normal pressure, and naturally cooled to room temperature, the obtained solid was centrifuged and washed, and dried at 80°C for 12 hours to obtain a dry sample;

[0075] S3: The dried sample was roasted at a high temperature of 900° C. for 2 hours under the protection of nitrogen to obtain a nitrogen-sulfur co-doped cauliflower-like carbon material, which was named M1.

Embodiment 2-5

[0076] Embodiment 2-5: the investigation of material consumption ratio in the step S1

Embodiment 2-3

[0077] Example 2-3: Except that in step S1, the mass ratio of tellurium diethyldithiocarbamate to hexachlorobutadiene is replaced by 1:200 and 1:300, other operations are unchanged, thereby repeating the operation Example 1, so that Examples 2-3 were carried out in sequence, and the obtained carbon materials were named M2 and M3 in sequence.

[0078] Table 1

[0079]

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Abstract

The invention relates to a carbon material with oxygen reduction activity and a nitrogen-sulfur co-doped cauliflower-like structure. The preparation method comprises steps that S1, hexachlorobutadieneand nitrogen-sulfur co-source compound are added into solvent, and closed reaction under high temperature and high pressure is carried out; S2, after the reaction is finished, the pressure relieved to normal pressure, naturally cooling to room temperature is performed, and centrifuging, washing and drying of the obtained solid are performed to obtain a dried sample; and S3, high-temperature roasting treatment of the dried sample under the protection of inert gas is carried out so as to obtain the nitrogen-sulfur co-doped cauliflower-like structure carbon material. The invention further relates to the composite material, application and an oxygen reduction electrode comprising the composite material. The nitrogen-sulfur co-doped cauliflower-like structure carbon material has excellent performance, can be used for preparing an oxygen reduction electrode of a fuel cell, can be used in the fuel cell, shows good electrochemical performance and has huge application potential and industrialvalues in the field of electrochemistry.

Description

technical field [0001] The invention belongs to the technical field of new materials and electrochemical energy, and specifically provides a cauliflower-like structure carbon material with nitrogen and sulfur co-doped with oxygen reduction activity, an oxygen reduction electrode, a preparation method, and a fuel cell. Background technique [0002] A fuel cell is a device that directly converts chemical energy present in fuel and oxidant into electrical energy. It has the advantages of high energy conversion efficiency, flexible installation location, fast load response, high operating quality, and low environmental pollution. However, due to the slow kinetics of cathode oxygen reduction (ORR), fuel cells are still a long way from large-scale commercialization. [0003] Nowadays, noble metal catalysts such as platinum have better catalytic performance in fuel cells. However, noble metals have disadvantages such as poor methanol resistance and poor cycle stability in the catal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/96H01M4/88C01B32/05
CPCH01M4/96H01M4/8803H01M4/8817H01M4/8825H01M4/8882C01B32/05Y02E60/50
Inventor 王舜李俊王梦昆金辉乐
Owner WENZHOU UNIVERSITY
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