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Electrochemical magnesium ionic insertion/deinsertion electrode and production method thereof

An ion electrode, electrochemical technology, applied in the direction of electrode manufacturing, battery electrodes, circuits, etc., to achieve the effect of enhancing stability and improving cycle performance

Inactive Publication Date: 2009-04-29
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, so far, with amorphous MoS 2 Nanocomposites of nanomaterials and amorphous carbon materials are used as electroactive materials to prepare electrodes for electrochemical intercalation / demagnesium ions, which have not been published yet.

Method used

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  • Electrochemical magnesium ionic insertion/deinsertion electrode and production method thereof
  • Electrochemical magnesium ionic insertion/deinsertion electrode and production method thereof
  • Electrochemical magnesium ionic insertion/deinsertion electrode and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]1) Dissolve 0.3g of sodium molybdate and 0.4g of thioacetamide in 80ml of deionized water, then add 1.0g of glucose, stir well, transfer the resulting solution to a hydrothermal reaction kettle, and heat it at 240°C React for 24 hours, then cool naturally, centrifuge to separate the precipitate, wash thoroughly with deionized water, and dry in vacuum at 80°C. The obtained precipitated product was heat-treated at 800° C. for 2 h in a tube furnace in a nitrogen-hydrogen mixed gas flow (the volume fraction of hydrogen in the mixed gas flow was 10%, and the flow rate of the gas flow was 200 sccm). After the heat treatment is completed, the product is taken out after the tube furnace is naturally cooled. The obtained product was analyzed and characterized by XRD, EDX and TEM. EDX analysis results show that the mass content of carbon in the nanocomposite is 30.1%. XRD analysis results show that the obtained product is amorphous MoS 2 Nanomaterials and nanocomposites of amor...

Embodiment 2

[0035] 1) Dissolve 0.3g of ammonium molybdate and 0.6g of thioacetamide in 150ml of deionized water, then add 3.3g of glucose, stir well, transfer the resulting solution to a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 200°C After 48 hours, it was cooled naturally, and the precipitate was separated by centrifugation, washed thoroughly with deionized water, and then dried in vacuum at 90°C. The obtained precipitated product was heat-treated at 1000° C. for 2 h in a tube furnace in a nitrogen-hydrogen mixed gas flow (the volume fraction of hydrogen in the mixed gas flow was 10%, and the flow rate of the gas flow was 200 sccm). After the heat treatment is completed, the product is taken out after the tube furnace is naturally cooled. The obtained product was analyzed and characterized by XRD, EDX and TEM. EDX analysis results show that the mass content of carbon in the nanocomposite is 60.3%. XRD analysis results show that the obtained product is amorph...

Embodiment 3

[0038] 1) Dissolve 0.3g of ammonium molybdate and 0.5g of thioacetamide in 100ml of deionized water, then add 1.7g of glucose, stir well, transfer the resulting solution to a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 220°C After 36 hours, it was cooled naturally, and the precipitate was separated by centrifugation, washed thoroughly with deionized water, and then dried in vacuum at 80°C. The obtained precipitated product was heat-treated at 900° C. for 2 h in a tube furnace in a nitrogen-hydrogen mixed gas flow (the volume fraction of hydrogen in the mixed gas flow was 10%, and the flow rate of the gas flow was 200 sccm). After the heat treatment is completed, the product is taken out after the tube furnace is naturally cooled. The final obtained product is analyzed and characterized by XRD, EDX and TEM. EDX analysis results show that the mass content of carbon in the nanocomposite is 41.1%. XRD analysis results show that the obtained product is am...

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Abstract

The invention discloses an electro-chemistry insertion / extraction magnesian ion electrode, the active substance of which is a nano composite material of amorphous MoS2 and amorphous carbon, the rest substances are acetylene black and polyvinylidene fluoride; the mass percentage of each component is as follows: 80-90 percent of the active materials of the nano composite material, 5-10 percent of the acetylene black and 5-10 percent of the polyvinylidene fluoride; wherein, the mass percentage of the amorphous carbon in the active substance of the nano composite material is 20-60 percent, the rest is the amorphous MoS2 which has the shape of nano whiskers and is highly dispersed into the amorphous carbon. The electrode has higher electro-chemistry insertion / extraction magnesian ion reversible capacity and better circulation stable performance.

Description

technical field [0001] The invention relates to an electrochemical intercalation / demagnesium ion electrode and a preparation method thereof, and belongs to the field of preparation of inorganic materials and the field of electrochemistry. Background technique [0002] Transition metal dichalcogenides have many excellent properties, such as superconducting properties, tribological properties, optical, electrical and magnetic properties. Among them, MoS 2 It has a typical layered structure, the S-Mo-S layer is covalently bonded, and the layers are combined with weaker Van der Waals force. The interlayer distance is 0.66nm, which is about twice the graphite interlayer distance. . MoS 2 As an industrial catalyst for hydrodesulfurization, and as a solid lubricant under vacuum and high temperature conditions, it has been widely studied and applied. At the same time MoS 2 This weaker interlayer force and larger interlayer spacing allow the introduction of foreign atoms or mole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/04
CPCY02E60/12Y02E60/10
Inventor 李辉陈卫祥马琳赵杰常焜
Owner ZHEJIANG UNIV