Potassium ion battery sulfur-doped mxene negative electrode material and preparation method thereof

A negative electrode material, sulfur-doped technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as unsatisfactory performance, and achieve the effects of low cost, stable charge and discharge performance, and high specific capacity

Active Publication Date: 2021-12-17
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, MXene itself is used as a negative electrode material for potassium-ion batteries, and its performance is still unsatisfactory.

Method used

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  • Potassium ion battery sulfur-doped mxene negative electrode material and preparation method thereof
  • Potassium ion battery sulfur-doped mxene negative electrode material and preparation method thereof
  • Potassium ion battery sulfur-doped mxene negative electrode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A preparation method of sulfur-doped MXene negative electrode material for potassium ion battery, comprising the following steps:

[0031] (1) Weigh 0.5g of V 2 CT x Add 0.5 g of dimethyl sulfone to deionized water, and magnetically stir for 4 hours to obtain a mixed solution;

[0032] (2) Move the mixed solution to the reaction kettle, move the reaction kettle to the oven and set the reaction temperature to 120°C and the reaction time to 12h, then cool to room temperature;

[0033] (3) The product obtained in step (2) was alternately washed 3 times with deionized water and ethanol, placed in a centrifuge for centrifugation at a speed of 3200r / min, and then vacuum-dried at 50°C for 12h;

[0034] (4) The product obtained in step (3) is heated up to 120° C. at a rate of 5° C. / min under a protective atmosphere of high-purity argon (purity ≥ 99.8%) at a gas flow rate of 150 ml / min, and kept at this temperature for 2 hour, cool down to room temperature to obtain the final...

Embodiment 2

[0038] A preparation method of sulfur-doped MXene negative electrode material for potassium ion battery, comprising the following steps:

[0039] (1) Weigh 0.4g of V 2 CT x Add 4 g of dimethyl sulfone to deionized water, and magnetically stir for 6 hours to obtain a mixed solution;

[0040] (2) Move the mixed solution to the reaction kettle, move the reaction kettle to the oven and set the reaction temperature to 150°C and the reaction time to 15h, then cool to room temperature;

[0041] (3) The product obtained in step (2) was alternately washed 3 times with deionized water and ethanol, placed in a centrifuge for centrifugation at a speed of 3200r / min, and then vacuum-dried at 50°C for 12h;

[0042] (4) The product obtained in step (3) is heated up to 420° C. at a rate of 5° C. / min under a protective atmosphere of high-purity argon (purity ≥ 99.8%) at a gas flow rate of 150 ml / min, and kept at this temperature for 4 hour, cool down to room temperature to obtain the final s...

Embodiment 3

[0046] A preparation method of sulfur-doped MXene negative electrode material for potassium ion battery, comprising the following steps:

[0047] (1) Weigh 0.3g of V 2 CTx and 6g of dimethyl sulfone were added to deionized water, and magnetically stirred for 8 hours to obtain a mixed solution;

[0048] (2) Move the mixed solution to the reaction kettle, move the reaction kettle to the oven and set the reaction temperature to 200°C and the reaction time to 18h, then cool to room temperature;

[0049] (3) The product obtained in step (2) was alternately washed 3 times with deionized water and ethanol, placed in a centrifuge for centrifugation at a speed of 3200r / min, and then vacuum-dried at 50°C for 12h;

[0050] (4) The product obtained in step (3) is heated up to 700° C. at a rate of 5° C. / min under a protective atmosphere of high-purity argon (purity ≥ 99.8%) at a gas flow rate of 150 ml / min, and kept at this temperature for 6 hour, cool down to room temperature to obtain ...

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Abstract

The invention discloses a sulfur-doped MXene negative electrode material for a potassium ion battery and a preparation method thereof. A mixed solution with a concentration of 1-100mg / ml; (2) move the mixed solution into a reactor and heat it to 120-200°C, react for 12-18h, and then cool to room temperature; (3) The product obtained in step (2) Washing with detergent and centrifuging, and then vacuum drying; (4) placing the dried product in step (3) in a tube furnace, introducing a protective gas, performing a heat treatment reaction, and cooling to room temperature to obtain the potassium Sulfur-doped MXene anode materials for ion batteries. The negative electrode material of the potassium ion battery prepared by the invention not only has good conductivity, but also has high specific capacity and stable charging and discharging performance.

Description

technical field [0001] The invention belongs to the field of new energy materials, and in particular relates to a preparation method of a potassium-ion battery sulfur-doped MXene negative electrode material and its application in a potassium-ion battery. Background technique [0002] With the development of modern society, fossil energy sources are constantly depleted and exhausted, and the problem of environmental pollution has become increasingly prominent. The development and research of new renewable clean energy sources have attracted widespread attention. Due to the abundant potassium resources, uniform distribution, and low cost, potassium-ion batteries may become a widely used battery system in the field of large-scale electrochemical energy storage. However, the electrochemical performance of potassium-ion batteries is still unsatisfactory. How to improve the specific capacity of potassium-ion batteries while maintaining excellent cycle performance is a current res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M10/054
CPCY02E60/10
Inventor 张业龙余金龙孙宏阳徐晓丹刘城位汪达张弛宋伟东陈梅温锦秀郭月曾庆光彭章泉
Owner WUYI UNIV
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