Nitrogen, phosphorus and sulfur co-doped mesoporous carbon spheres and preparation method of mesoporous carbon spheres

Abstract

The invention relates to a preparation method for nitrogen, phosphorus and sulfur co-doped mesoporous carbon spheres. The method utilizes polyaniline doped organic acid-phytic acid as a carbon precursor, and uses nano silicon dioxide spheres as a template agent, and polyaniline, phytic acid and ammonium persulfate are simultaneously used as nitrogen, phosphorus and sulfur sources; and high-temperature carbonization is performed, a template substance is removed, and therefore the nitrogen, phosphorus and sulfur co-doped mesoporous carbon spheres are obtained. According to the method provided bythe invention, the prepared mesoporous carbon spheres have a unique pore structure, the high content of codoping of nitrogen, phosphorus and sulfur, and a high specific surface area; the preparationprocess is fast and simple, the structure is controllable, and the carbon spheres are suitable for mass production; and the prepared nitrogen, phosphorus and sulfur co-doped mesoporous carbon spherescan be widely used in the fields of supercapacitors, capacitive desalination, lithium ion batteries, sodium ion batteries and the like.

Description

technical field [0001] The invention relates to a nitrogen, phosphorus and sulfur co-doped mesoporous carbon sphere with a polymer compound as a precursor and a preparation method thereof, belonging to the field of carbon material preparation technology. Background technique [0002] Porous carbon material is a widely used inorganic material. It has rich pore structure, high chemical stability, low cost and large specific surface area. It is a good electrode material in supercapacitors. The traditional preparation method is produced by pyrolysis of high molecular polymers or biomass materials. For example, Yang Quanhong et al. mixed potassium hydroxide and lotus stems and other biomass, and calcined to form porous carbon materials (Y. Zhang, S. Liu, X.Zheng, X.Wang, Y.Xu, H.Tang, F.Kang, Q.-H.Yang and J.Luo, Advanced Functional Materials, 2017, 27, 1604687), Wang Huanting and others through the synthesis of phenolic resin calcined Formation of porous carbon spheres (J. Wei,...

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Problems solved by technology

[0003] One of the purposes of the present invention is to solve the shortcomings of current porous carbon materials such as poor electrical conductivity, disordered structure, and single pore distribution, by introducing nitrogen-rich, phosphorus, and sulfur compounds into the carbon precursor, and adding a structure-directing agent silica, Nitrogen, phosphorus and sulfur co-doped mesoporous carbon spheres with uniformly dispersed heteroatom doping and unique hierarchical porous structure obtained

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