A high-performance special structure monodisperse carbon sphere negative electrode material and its preparation method and application

A technology of special structure and negative electrode material, applied in the field of high-performance special structure monodisperse carbon ball negative electrode material and its preparation, can solve the problems such as the large-scale preparation of Chaoitecarbon, which is convenient for industrial production, improves the sodium storage capacity, and the operation process. simple effect

Active Publication Date: 2021-12-10
临汾袤源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no method for large-scale preparation of Chaoite carbon

Method used

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  • A high-performance special structure monodisperse carbon sphere negative electrode material and its preparation method and application
  • A high-performance special structure monodisperse carbon sphere negative electrode material and its preparation method and application
  • A high-performance special structure monodisperse carbon sphere negative electrode material and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Disperse 0.1g of P123 in a certain amount of deionized water and ultrasonically stir until completely dissolved, then add 0.05g of Fe 2 (SO 4 ) 3 .7H 2O, stirred ultrasonically for 15 min; then started magnetic stirring in an ice bath for 20 min. Separately disperse 0.1mL of aniline in a certain amount of deionized water, and disperse evenly (no oil droplets) with ultrasonic stirring, add 0.1g of P123 and 0.08mL of phytic acid and disperse with ultrasonic stirring until completely dissolved; then start magnetic stirring in ice bath for 20min. The two solutions were mixed, and magnetically stirred for 20 minutes under ice bath conditions; another 6 mL of ammonium persulfate aqueous solution (containing 0.5 g of ammonium persulfate) was prepared, poured into the above mixed solution, and ice-bathed for 12 hours. After the reaction is finished, filter with suction, wash with deionized water for 3 to 5 times, and dry in vacuum at 70° C. for 3 to 5 hours to prepare precur...

Embodiment 2

[0038] Disperse 0.2g of P123 in deionized water with ultrasonic stirring until completely dissolved, then add 0.3g of Fe 2 (SO 4 ) 3 .7H 2 O, stirred ultrasonically for 15 min; then started magnetic stirring in an ice bath for 20 min. Separately disperse 0.229mL of aniline in a certain amount of deionized water, stir ultrasonically to disperse evenly (without oil droplets), add 0.2g P123 and 0.46mL phytic acid and ultrasonically stir to disperse until completely dissolved; then start magnetic stirring in an ice bath for 20min. The two solutions were mixed, and magnetically stirred for 20 minutes under ice bath conditions; another 6 mL of ammonium persulfate aqueous solution (containing 0.5 g of ammonium persulfate) was prepared, poured into the above mixed solution, and ice-bathed for 12 hours. After the reaction is finished, filter with suction, wash with deionized water for 3 to 5 times, and dry in vacuum at 70° C. for 3 to 5 hours to prepare precursor monodisperse sphere...

Embodiment 3

[0041] Disperse 0.5g of P123 in deionized water with ultrasonic stirring until completely dissolved, then add 2g of Fe 2 (SO 4 ) 3 .7H 2 O, stirred ultrasonically for 15 min; then started magnetic stirring in an ice bath for 20 min. Separately disperse 0.916mL of aniline in a certain amount of deionized water, stir ultrasonically to disperse evenly (no oil drops), add 0.5g P123 and 1.35mL phytic acid and ultrasonically stir to disperse until completely dissolved; then start magnetic stirring in ice bath for 20min. The two solutions were mixed, and magnetically stirred for 20 minutes under ice bath conditions; another 6 mL of ammonium persulfate aqueous solution (containing 1.5 g of ammonium persulfate) was prepared, poured into the above mixed solution, and ice-bathed for 12 hours. After the reaction is finished, filter with suction, wash with deionized water for 3 to 5 times, and dry in vacuum at 70° C. for 3 to 5 hours to prepare precursor monodisperse spheres. The obtai...

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Abstract

The invention discloses a high-performance monodisperse carbon sphere with a special structure and its preparation method and application. The preparation method is to add phytic acid, P123, and ferric sulfate into the solution of pyrrole or aniline monomer, and then magnetically stir in an ice bath, and then Add ammonium persulfate aqueous solution to initiate the copolymerization reaction, and finally prepare iron-doped special spherical carbon structure materials with monodisperse characteristics through high-temperature carbonization in one step. According to the characteristics of sodium battery negative electrode materials in the charge-discharge cycle, the invention designs and prepares iron-doped spherical carbon materials. Carbon presents a Chaoite carbon structure type, and the particle size of all materials is basically the same, showing monodisperse characteristics. This material property is conducive to eliminating the polarization of electrode materials, and its large lattice spacing is conducive to the storage of sodium ions, thus effectively Improve the electrochemical performance of electrode materials. The invention has cheap preparation raw materials, simple operation process, high yield, excellent charge and discharge performance of the material, and is convenient for industrialized production.

Description

technical field [0001] The invention relates to the technical field of negative electrode materials for sodium ion batteries, in particular to a high-performance special structure monodisperse carbon sphere negative electrode material and its preparation method and application. Background technique [0002] In the 1970s and 1980s, the research on sodium-ion batteries and lithium-ion batteries was almost at the same level. However, the successful application of graphite negative electrodes in lithium-ion batteries directly promoted its commercialization process, but sodium-ion batteries have not yet been developed. To achieve a breakthrough in industrialization, one of the bottlenecks is the lack of suitable practical anode materials. In recent years, the research on sodium-ion batteries has made important progress one after another. Among them, the research on negative electrode materials mainly focuses on carbon materials and some non-carbon materials (metals and oxide mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/587H01M4/62H01M10/054
CPCY02E60/10
Inventor 岳鹿张文惠罗改霞张婷婷陆海勤陈海燕冉雪凯唐双寅关荣锋
Owner 临汾袤源新材料科技有限公司
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