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Preparation method of metal phase vanadium/molybdenum disulfide/carbon cloth sodium ion battery negative electrode material

A sodium-ion battery, molybdenum disulfide technology, applied in battery electrodes, secondary batteries, negative electrodes, etc., can solve the problems of poor cycle performance, easy material agglomeration, etc., to improve electrical conductivity, good electrical conductivity, and good development prospects Effect

Active Publication Date: 2020-06-12
XINYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, molybdenum disulfide also has the common problems of transition metal sulfides, such as easy agglomeration of materials and poor cycle performance.

Method used

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  • Preparation method of metal phase vanadium/molybdenum disulfide/carbon cloth sodium ion battery negative electrode material
  • Preparation method of metal phase vanadium/molybdenum disulfide/carbon cloth sodium ion battery negative electrode material
  • Preparation method of metal phase vanadium/molybdenum disulfide/carbon cloth sodium ion battery negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 50 mL of concentrated nitric acid into the inner lining of the reaction kettle, arrange the carbon in the inner lining of the reaction kettle, heat at 90°C for 8 h, wash and dry it for later use. Dissolve 60 mg of ammonium molybdate tetrahydrate, 1 g of L-cysteine, and 9 mg of sodium vanadate in 70 mL of deionized water. Pour the mixed solution into the lining of the reactor, add acid-treated carbon cloth material with a size of 3 cm*5 cm, and put it in an oven at 220 °C for 24 h. After naturally cooling to room temperature, the carbon cloth material was taken out, washed by centrifugation, and dried at 60°C. Obtain metal phase vanadium / molybdenum disulfide / carbon cloth material;

[0029] like Figure 1-Figure 6 Shown:

[0030] It is detected that the vanadium / molybdenum disulfide / carbon cloth material prepared in this embodiment is a metal phase.

[0031] It has been tested that the flaky vanadium / molybdenum disulfide material prepared in this embodiment grows ...

Embodiment 2

[0035] Add 50 mL of concentrated nitric acid into the inner lining of the reaction kettle, arrange the carbon in the inner lining of the reaction kettle, heat at 90°C for 8 h, wash and dry it for later use. Dissolve 80 mg of ammonium molybdate tetrahydrate, 1.4 g of L-cysteine, and 12 mg of sodium vanadate in 70 mL of deionized water. Pour the mixed solution into the lining of the reactor, add acid-treated carbon cloth material with a size of 3 cm*5 cm, and put it in an oven at 220 °C for 24 h. After naturally cooling to room temperature, the carbon cloth material was taken out, washed by centrifugation, and dried at 60°C to obtain a metal phase vanadium / molybdenum disulfide / carbon cloth material.

[0036] like Figure 7 It can be seen from the test that the vanadium / molybdenum disulfide / carbon cloth material prepared in this embodiment is a metal phase and the interlayer distance is relatively large.

[0037] After testing, in the vanadium / molybdenum disulfide / carbon cloth ...

Embodiment 3

[0041] Add 50 mL of concentrated nitric acid into the inner lining of the reaction kettle, arrange the carbon in the inner lining of the reaction kettle, heat at 90°C for 8 h, wash and dry it for later use. Dissolve 60 mg of ammonium molybdate tetrahydrate, 1 g of L-cysteine, and 18 mg of sodium vanadate in 70 mL of deionized water. Pour the mixed solution into the lining of the reactor, add acid-treated carbon cloth material with a size of 3 cm*5 cm, and place it in an oven at 220 °C for 24 h. After naturally cooling to room temperature, the carbon cloth composite material was taken out, washed by centrifugation, and dried at 60°C. A metallic phase vanadium / molybdenum disulfide / carbon cloth material is obtained.

[0042] like Figure 8 It can be seen from the test that the vanadium / molybdenum disulfide / carbon cloth material prepared in this embodiment is a metal phase and has a large interlayer distance.

[0043] It is tested that the flake-shaped vanadium / molybdenum disulfi...

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Abstract

The invention discloses a method for synthesizing metal-phase vanadium / molybdenum disulfide / carbon cloth as a negative electrode material of a sodium-ion battery by a simple hydrothermal method. According to the invention, the carbon cloth is used as a substrate for in-situ growth of the nanosheet-shaped metal phase vanadium / molybdenum disulfide, and the nanosheet-shaped metal phase vanadium / molybdenum disulfide can be directly used as a negative electrode material of a sodium-ion battery without adding a conductive agent and a binder, so that the conductivity and utilization rate of the material are improved, and an ion intercalation barrier layer is reduced. Meanwhile, intercalation of vanadium can further enlarge the interlayer spacing of the material, and the charge-discharge specificcapacity and the cycling stability of the electrode material are remarkably improved. The sodium ion battery negative electrode material disclosed by the invention is simple in experimental operationand low in production cost, and has a wide industrial application prospect.

Description

technical field [0001] The invention belongs to the field of preparation of negative electrode materials of sodium ion batteries, and relates to a preparation method of metal phase vanadium / molybdenum disulfide / carbon cloth negative electrode materials of sodium ion batteries. Background technique [0002] With the rapid development of industrial technology and the unrestrained exploitation and use of fossil fuels, a series of energy crises and environmental pollution have been triggered. Therefore, it is very important to develop and utilize green and sustainable energy storage technologies. Sodium-ion battery is a new type of secondary battery that has been studied more in recent years. It has a similar working principle to lithium-ion batteries, and at the same time, sodium has a very suitable oxidation-reduction potential and requires less power loss. Compared with traditional lithium-ion batteries, sodium-ion batteries have the advantages of abundant raw materials, lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/58H01M4/62H01M10/054
CPCH01M4/362H01M4/38H01M4/5815H01M4/625H01M10/054H01M2004/027Y02E60/10
Inventor 黄克靖王丽娜许婧武旭
Owner XINYANG NORMAL UNIVERSITY
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