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Multi-edge WS2/graphene electrochemical magnesium storage composite electrode and preparation method

A composite electrode, alkene electrochemical technology, used in battery electrodes, circuits, electrical components, etc.

Inactive Publication Date: 2014-10-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, so far, with multi-edge WS 2 Nanosheet / graphene composite nanomaterials as electrochemically active materials for electrochemical magnesium storage composite electrodes and their preparation have not been reported yet

Method used

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  • Multi-edge WS2/graphene electrochemical magnesium storage composite electrode and preparation method
  • Multi-edge WS2/graphene electrochemical magnesium storage composite electrode and preparation method
  • Multi-edge WS2/graphene electrochemical magnesium storage composite electrode and preparation method

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Embodiment 1

[0026] 1) Ultrasonically disperse 2.5 mmol graphene oxide in 60 mL deionized water, add 0.5 mL ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate (see figure 1 Schematic diagram) and fully stirred, then added 0.76g (6.25 mmol) L-cysteine ​​and 1.25 mmol ammonium thiotungstate in sequence, and kept stirring to make L-cysteine ​​and ammonium thiotungstate completely Dissolve and adjust the volume to about 80 mL with deionized water;

[0027] 2) Transfer the obtained mixed solution to a 100 mL hydrothermal reaction kettle, put the reaction kettle into a constant temperature oven, and after hydrothermal reaction at 240 °C for 24 h, let it cool down to room temperature naturally, and collect the solid by centrifugation The product was fully washed with deionized water and dried under vacuum at 100 °C. The obtained hydrothermal solid product was heat-treated at 500 °C for 2 h in a nitrogen / hydrogen mixed atmosphere, and the volume fraction of hydrogen in the mixed gas was 10...

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Abstract

The invention discloses a multi-edge WS2 / graphene electrochemical magnesium storage composite electrode and a preparation method thereof. An electrochemical magnesium storage active substance of the composite electrode adopts a composite nanomaterial consisting of multi-edge WS2 nanosheets with a few layers and graphene, a substance ratio of WS2 to graphene in the composite nanomaterial is 1:2, and the composite electrode comprises components in percentage by mass as follows: 80% of the multi-edge WS2 nanosheet / graphene composite nanomaterial, 10% of acetylene black, 5% of carboxymethyl cellulose and 5% of polyvinylidene fluoride. The preparation method comprises the steps as follows: the multi-edge WS2 nanosheet / graphene composite nanomaterial with a few layers is firstly prepared, the prepared multi-edge WS2 nanosheet / graphene composite nanomaterial, acetylene black and polyvinylidene fluoride are prepared into uniform slurry, copper foil as a current collector is uniformly coated with the slurry, and after the slurry is dried, the composite electrode is obtained through rolling. The prepared multi-edge WS2 / graphene electrochemical magnesium storage composite electrode has high electrochemical magnesium storage capacity.

Description

technical field [0001] The invention relates to an electrochemical magnesium storage electrode and a preparation method thereof, in particular to a multi-edge WS 2 The invention discloses a graphene electrochemical magnesium storage composite electrode and a preparation method thereof, which belong to the technical field of new energy materials and energy storage and conversion. Background technique [0002] With the development of modern mobile communications, new energy vehicles and smart grids, new chemical power sources play an increasingly important role in modern society. Traditional secondary batteries, such as lead-acid batteries, have limited applications due to the harmful metal element Pb they contain. Lithium-ion batteries have excellent properties such as high specific energy, no memory effect, and environmental friendliness, and have been widely used in portable mobile appliances such as mobile phones and notebook computers. As a power battery, lithium-ion ba...

Claims

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Application Information

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IPC IPC(8): H01M4/583
CPCB82Y30/00B82Y40/00H01M4/136H01M4/1397H01M4/366H01M4/5815H01M4/625H01M2004/021Y02E60/10
Inventor 陈卫祥马琳孙虎叶剑波陈倩男王臻
Owner ZHEJIANG UNIV
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