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Preparation method for coralline nitrogen and phosphorus co-doped carbon composite material and application of composite material in sodium-ion battery

A carbon composite material and co-doping technology, which is applied in the direction of battery electrodes, secondary batteries, circuits, etc., to achieve moderate layer spacing, high channel crosslinking degree, and good reproducibility

Inactive Publication Date: 2017-01-11
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems existing in the existing carbon anode materials for sodium-ion batteries, an object of the present invention is to provide a porous coral-like nitrogen-phosphorus co-doped carbon composite material with moderate layer spacing, large specific surface area, rich reactive sites, and rich channels. The preparation method of the method has easy-to-obtain raw materials, low cost, environmental protection, high controllability, good repeatability, and is easy to realize industrial production

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  • Preparation method for coralline nitrogen and phosphorus co-doped carbon composite material and application of composite material in sodium-ion battery

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Embodiment 1

[0033] Add aniline, phytic acid, and ferric chloride to the sodium chloride solution in sequence, and the concentration of the sodium chloride solution in the solution is 100g / L; the mass ratio of aniline to phytic acid is 0.5; the mass ratio of aniline to ferric chloride is 1; the mass ratio of aniline to ferric chloride is 1; The mass ratio to sodium chloride is 0.01, stir evenly, the temperature of the mixed solution is kept at 0°C, and the holding time is 10h to obtain polyaniline phytic acid-sodium chloride gel, after freeze-drying, 2g of polyaniline phytic acid-chlorinated The sodium gel is placed in a quartz tube furnace, protected by an inert gas, heated to 700°C, and kept for 2 hours to obtain a carbon material. The carbon material is washed with acid, water, and ethanol to obtain a porous coral-like nitrogen-phosphorus co-doped carbon composite material. The specific surface area 1500m 2 / g, the nitrogen atom content is 2.9wt%, and the phosphorus atom content is 0.7w...

Embodiment 2

[0036] Add aniline, phytic acid, and ferric chloride to the sodium chloride solution in sequence, and the concentration of the sodium chloride solution in the solution is 200g / L; the mass ratio of aniline to phytic acid is 1; the mass ratio of aniline to ferric chloride is 1; the mass ratio of aniline to ferric chloride is 1; The mass ratio to sodium chloride is 0.05, stir evenly, the temperature of the mixed solution is kept at 5°C, and the holding time is 1h to obtain polyaniline phytic acid-sodium chloride gel, after freeze-drying, 2g of polyaniline phytic acid-chlorinated The sodium gel is placed in a quartz tube furnace, protected by an inert gas, heated to 600°C, and kept for 3 hours to obtain a carbon material. The carbon material is washed with acid, water, and ethanol to obtain a coral-like porous nitrogen-phosphorus co-doped carbon sponge material. The specific surface area 900m 2 / g, the content of nitrogen atoms is 3.5wt%, and the content of phosphorus atoms is 0.5...

Embodiment 3

[0039] Add aniline, phytic acid, and ferric chloride to the sodium chloride solution in sequence, and the concentration of the sodium chloride solution in the solution is 500g / L; the mass ratio of aniline to phytic acid is 1; the mass ratio of aniline to ferric chloride is 0.5; the mass ratio of aniline to ferric chloride is 0.5; The mass ratio to sodium chloride is 0.01, stir evenly, the temperature of the mixed solution is kept at 20°C, and the holding time is 0.5h to obtain a polyaniline phytic acid-sodium chloride gel, which is freeze-dried and 2g of polyaniline phytic acid-chlorine The sodium chloride gel was placed in a quartz tube furnace, protected by an inert gas, heated to 750°C, and kept for 3 hours to obtain a carbon material. The carbon material was washed with acid, water, and ethanol to obtain a coral-like porous nitrogen-phosphorus co-doped carbon sponge material. Surface area is

[0040] 2800m 2 / g, the content of nitrogen atoms is 10.1wt%, and the content of...

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Abstract

The invention discloses a preparation method for a coralline nitrogen and phosphorus co-doped carbon composite material and an application of the composite material in a sodium-ion battery. The preparation method comprises the following steps: adopting aniline, phytic acid, ferric chloride and sodium chloride for preparing a polyaniline phytic acid-sodium chloride gel according to a saline solution method; performing thermal treatment on the polyaniline phytic acid-sodium chloride gel at 400-800 DEG C; washing, thereby acquiring the coralline nitrogen and phosphorus co-doped carbon composite material. According to the method, the raw materials are easily acquired, the technique is simple and industrialization is easily realized; the prepared coralline nitrogen and phosphorus co-doped carbon composite material has the advantages of high-content nitrogen and phosphorus heteroatom, uniform heteroatom distribution, developed pore, large specific surface area, rich reaction active site, excellent electrical conductivity, and the like; the coralline nitrogen and phosphorus co-doped carbon composite material is applied to the sodium-ion battery and can show an excellent battery performance.

Description

technical field [0001] The invention relates to a preparation method of a nitrogen-phosphorus co-doped carbon material, in particular to the preparation and application of a coral-like nitrogen-phosphorus co-doped carbon composite material, which belongs to the field of sodium ion batteries. Background technique [0002] Sodium-ion batteries have become a research hotspot in the new generation of secondary battery systems due to their rich sodium reserves and the advantages of existing battery achievements. However, the high negative electrode voltage of sodium-ion batteries and the large radius of sodium ions pose many difficulties for the development of high-efficiency sodium-ion batteries. Electrode materials determine important parameters such as battery capacity, operating voltage, and cycle life. Although the reaction mechanism in sodium-ion batteries is similar to that in lithium-ion batteries, however, sodium ions are about 55% larger than lithium ions, and the inte...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/587H01M4/62H01M10/054
CPCH01M4/364H01M4/587H01M4/62H01M10/054H01M2004/021Y02E60/10
Inventor 张治安陈玉祥李劼李军明王鹏王麒羽
Owner CENT SOUTH UNIV
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