Mg < 2 + > pre-embedded magnesium ion battery positive electrode material MgVS4/N-TG and application

A magnesium-ion battery and cathode material technology, applied in the field of magnesium-ion battery cathode materials, to achieve excellent electrochemical performance, high electrochemical reactivity, and enhanced cycle stability

Pending Publication Date: 2022-02-11
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, regarding Mg 2+ Pre-embedded VS grown on the surface of nitrogen-doped tubular graphene (N-TG) 4 , to improve the electrochemical performance of its Mg-ion battery has not been reported

Method used

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  • Mg &lt; 2 + &gt; pre-embedded magnesium ion battery positive electrode material MgVS4/N-TG and application
  • Mg &lt; 2 + &gt; pre-embedded magnesium ion battery positive electrode material MgVS4/N-TG and application
  • Mg &lt; 2 + &gt; pre-embedded magnesium ion battery positive electrode material MgVS4/N-TG and application

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Embodiment

[0029] Weigh 12.6g of melamine and 1.4g of silicon powder, put them into a vertical vacuum atmosphere furnace together with the carbon sheet dripped with nickel nitrate catalyst after fully grinding, react at 1250°C for 30min, and cool to room temperature with the furnace to obtain uniform growth in N-TG on a carbon sheet; weigh 0.5814g of ammonium metavanadate and dissolve it in 30ml of deionized water, stir at 60°C until it is completely dissolved to obtain solution A; weigh excess thioacetamide and dissolve it in 30ml of ethylene di alcohol, stirred at room temperature until it was completely dissolved to obtain solution B; fully mixed solution B and solution A at 60°C; transferred the mixed solution and the carbon sheet with N-TG growth to a 100ml reaction kettle, and React at 180°C for 4 hours, and cool to room temperature with the furnace; take out the sample, rinse it with deionized water and absolute ethanol three times, put it in a vacuum drying oven at 60°C for 12 hou...

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Abstract

The invention discloses an Mg < 2 + > pre-embedded magnesium ion battery positive electrode material MgVS4 / N-TG and application, and belongs to the technical field of battery materials. The preparation method comprises the following steps: preparing ammonium metavanadate into an aqueous solution, then mixing the aqueous solution with an excessive thioacetamide glycol solution, transferring the mixture and a carbon plate which is prepared by adopting a vapor deposition method and on which N-TG grows into a reaction kettle, and carrying out hydrothermal reaction at 180 DEG C for 4 hours; and drying the product, and pre-embedding Mg < 2 + > in a MgSO4 solution by using an electrochemical method to obtain the magnesium ion battery positive electrode material MgVS4 / N-TG. Through pre-embedding of Mg < 2 + >, the interchain spacing of VS4 can be enlarged, the appearance of V < 2 + > and V < 3 + > can be induced, and the electrochemical performance of the magnesium ion battery is improved. A magnesium ion battery assembled by the composite material has high specific capacity and excellent cycling stability, and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a Mg 2+ Pre-intercalated magnesium ion battery cathode material MgVS 4 / N-TG and application. Background technique [0002] With the increase of energy consumption and the aggravation of environmental pollution, the research, development and promotion of renewable energy storage devices are urgently needed. Magnesium-ion batteries are widely used due to their high safety, low cost, and high theoretical volumetric capacity (3833mAh cm -3 ) and similar working principles to lithium-ion batteries have attracted widespread attention. However, during the intercalation / extraction process of magnesium working ions, there is a large polarization between magnesium working ions and cathode materials, resulting in poor stability and low reaction kinetics of cathode materials. vs. 4 As an energy storage material, it has a one-dimensional linear chain structure extending along ...

Claims

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Application Information

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IPC IPC(8): H01M4/136H01M4/133H01M4/1393H01M4/1397H01M10/054
CPCH01M4/136H01M4/1397H01M4/1393H01M4/133H01M10/054H01M2004/028Y02E60/10
Inventor 李镇江丁诗琦田雨欣戴鑫孟阿兰
Owner QINGDAO UNIV OF SCI & TECH
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