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Preparation method and application of N, S co-doped carbon/tin disulfide composite material

A technology of tin disulfide and composites, which is applied in the field of preparation of carbon/tin disulfide composite materials, can solve the problems of energy consumption, complex synthesis process, and time-consuming, and achieve high potassium storage capacity, high purity, and cycle stability excellent effect

Active Publication Date: 2020-08-25
XINYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a negative electrode material for potassium ion batteries, tin disulfide has the advantages of high theoretical capacity, easy preparation, and low price, but its volume expands greatly during charge and discharge, and the intermediate product of potassium polysulfide dissolves in the electrolyte, which will lead to its cycle. poor stability
Although there are many methods to realize the preparation of tin disulfide and carbon matrix composites, such as solid phase method, precipitation method, hydrothermal or solvothermal synthesis method, etc., the synthesis process of these methods is relatively complicated at present, and separation and washing are required. cumbersome steps, time-consuming and energy-consuming

Method used

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  • Preparation method and application of N, S co-doped carbon/tin disulfide composite material
  • Preparation method and application of N, S co-doped carbon/tin disulfide composite material
  • Preparation method and application of N, S co-doped carbon/tin disulfide composite material

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Effect test

Embodiment 1

[0025] Weigh 0.5g tetraphenyl tin and place it in porcelain boat A, weigh 1.0g thiourea and place it in porcelain boat B, place porcelain boat A and porcelain boat B in a tube furnace filled with argon, and seal it; The temperature of the tube furnace is raised to 500 °C at 5 °C / min, and it is kept for 1~3 hours. When the temperature of the tube furnace is naturally cooled to 100~200 °C, argon gas is introduced, and the reaction tail gas is treated with 1mol / L sodium hydroxide solution and water successively. After discharge, the temperature was naturally lowered to room temperature, and the target product sample was obtained.

Embodiment 2

[0027] Weigh 0.5g tetraphenyl tin and place it in porcelain boat A, weigh 1.5g thiourea and place it in porcelain boat B, place porcelain boat A and porcelain boat B in a tube furnace filled with argon, and seal it; The temperature of the tube furnace is raised to 500 °C at 5 °C / min, and it is kept for 1~3 hours. When the temperature of the tube furnace is naturally cooled to 100~200 °C, argon gas is introduced, and the reaction tail gas is treated with 1mol / L sodium hydroxide solution and water successively. After discharge, the temperature was naturally lowered to room temperature, and the target product sample was obtained.

Embodiment 3

[0029] Weigh 0.5g tetraphenyl tin and place it in porcelain boat A, weigh 2.0g thiourea and place it in porcelain boat B, place porcelain boat A and porcelain boat B in a tube furnace filled with argon, and seal it; The temperature of the tube furnace is raised to 500 °C at 5 °C / min, and it is kept for 1~3 hours. When the temperature of the tube furnace is naturally cooled to 100~200 °C, argon gas is introduced, and the reaction tail gas is treated with 1mol / L sodium hydroxide solution and water successively. After discharge, the temperature was naturally lowered to room temperature, and the target product sample was obtained.

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Abstract

The invention belongs to the technical field of material synthesis, and discloses a preparation method of an N, S co-doped carbon / tin disulfide composite material. The method takes tetraphenyltin as atin source and a carbon source and thiourea as a nitrogen source and a sulfur source, and comprises the following steps: respectively putting tetraphenyltin and thiourea into a porcelain boat, and putting theporcelain boat into a tubular furnace filled with argon, and carrying out sealing; and heating the tubular furnace to 500 DEG C at a speed of 5 DEG C / min, keeping the temperature for 1-3 hours, and naturally cooling to room temperature to obtain the target product. According to the method, the N, S co-doped carbon / tin disulfide composite material is directly synthesized through one step,the method does not need complex steps such as separation and washing, and the method is simple, convenient, rapid, time-saving and labor-saving. The product obtained by the method is high in purity,and has the characteristics of high potassium storage capacity and excellent cycling stability when being used as a negative electrode material of a potassium ion battery.

Description

technical field [0001] The invention belongs to the technical field of material synthesis, and relates to a preparation method and application of an N, S co-doped carbon / tin disulfide composite material. Background technique [0002] Potassium-ion batteries are expected to be applied in the field of large-scale energy storage due to the advantages of rich potassium resources and fast conduction of potassium ions in the electrolyte. The development of high-capacity potassium-ion battery materials has become a research focus. As a negative electrode material for potassium ion batteries, tin disulfide has the advantages of high theoretical capacity, easy preparation, and low price, but its volume expands greatly during charging and discharging, and the intermediate product of potassium polysulfide dissolves in the electrolyte, which will lead to its cycle. Poor stability. Hybridizing carbon-based materials with tin disulfide to prepare composite materials is an effective metho...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/587H01M10/054
CPCH01M4/364H01M4/5815H01M4/366H01M4/587H01M10/054H01M2004/027Y02E60/10
Inventor 曹康哲刘会俏贾永恒高子惠刘怡圆
Owner XINYANG NORMAL UNIVERSITY
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