Doping modification method and application of porous carbon material

Abstract

The invention relates to a doping modification method of a porous carbon material. According to the method, a reduction-oxidization graphene-loaded transition metal chalcogenide is doped in the porouscarbon material for surface doping modification on the porous carbon material. By the chemical absorption and the catalytic effect of an unsaturated dangling bond of the transition metal chalcogenide, the absorption performance of the porous carbon material can be improved, a shuttling effect of polysulfide lithium is reduced, and meanwhile, the electrochemical reaction dynamic process also can be accelerated. The porous carbon material modified by the transition metal chalcogenide is used for fabricating a battery electrode, an electrode coating layer, a blocking layer or a battery separator, and the electrochemical performance of the lithium-sulfur battery is improved.

Description

technical field [0001] The invention relates to a method for modifying porous carbon materials, and the use of the porous carbon materials modified by the method for making battery electrodes or as electrode coatings and barrier layers. Background technique [0002] With the continuous rapid development of society, the increasing consumption of traditional fossil energy materials and the huge pollution brought to the environment during the use process have caused human society to encounter two major crises of energy and environment at the same time. At the same time, the information age puts forward many high requirements for energy supply. In order to cope with the crisis, it is urgent to develop green, clean and portable energy equipment for 3C and power, which involves small high-tech equipment such as mobile phones, computers, wearable devices, and wireless communication equipment. With new energy vehicles, drones, unmanned surveillance ships, various detectors and other...

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Problems solved by technology

[0004] In order to solve the above problems, some researchers have made a lot of attempts in the modification of porous carbon materials, and applied the modified porous carbon materials to lithium-sulfur batteries to improve the shuttle effect and promote the electrochemical reaction rate. , but the multi-modification modification method is complicated and the cost is high, which is not only unfavorable for industrial production, but also the effect of the obtained modified porous material is not ideal after being applied to the battery

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