Doping modification method and application of porous carbon material

A porous carbon material and modification technology, which is applied to structural parts, electrical components, battery electrodes, etc., can solve the problems of complex modification methods, unfavorable industrial production, and unsatisfactory effects, so as to improve electrochemical performance and improve Electrochemical properties, the effect of mitigating the shuttle effect

Inactive Publication Date: 2018-06-15
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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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 electrochem

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  • Doping modification method and application of porous carbon material
  • Doping modification method and application of porous carbon material
  • Doping modification method and application of porous carbon material

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experiment example

[0056] Experimental example: the ferrous disulfide (FeS 2 ) doped and modified porous carbon material loaded with sulfur to obtain sulfur / porous carbon composite material powder, take 2.8g of the aforementioned powder, mix with SP and PVDF in a ratio of 7:1:2 to make a slurry (the solvent is NMP) (middle The preparation of the layer only needs to mix the sulfur-loaded powder with PVDF in proportion, the solvent is still NMP, coat it on the aluminum foil and dry it and peel it off), coat the slurry on the positive electrode of the ordinary battery on the aluminum foil, assemble the battery, and the negative electrode is a lithium sheet , the electrolyte is an ether-based organic solvent of 1,3-dioxolane (DOL) / ethylene glycol dimethyl ether (DME) with a volume ratio of 1:1, and the lithium salt is 1.0M bistri Lithium fluoromethylsulfonyl imide (LiTFSI), additive is 1wt.% LiNO 3 (1.0M LiTFSI in DOL:DME=1:1Vol%with 1wt.%LiNO 3 ), assemble the battery for cycle performance test, ...

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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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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/364H01M4/5815H01M4/628H01M10/0525Y02E60/10
Inventor 武俊伟顾文亮崔彦辉唐启明白赟张新河姜琴丁志玉
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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