Multi-edge ws2/graphene electrochemical sodium storage composite electrode and preparation method

A composite electrode, ene electrochemical technology, applied in the direction of battery electrodes, circuits, electrical components, etc.

Inactive Publication Date: 2016-05-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Multi-edge ws2/graphene electrochemical sodium storage composite electrode and preparation method
  • Multi-edge ws2/graphene electrochemical sodium storage composite electrode and preparation method
  • Multi-edge ws2/graphene electrochemical sodium storage composite electrode and preparation method

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Embodiment 1

[0025] 1) Ultrasonic disperse 2.5mmol graphene oxide in 60mL deionized water, add 0.5mL ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate (see figure 1 Schematic diagram) and fully stirred, then added 0.76g (6.25mmol) L-cysteine ​​and 1.25mmol ammonium thiotungstate in sequence, and kept stirring to make L-cysteine ​​and ammonium thiotungstate completely Dissolve and adjust the volume to about 80mL with deionized water;

[0026] 2) Transfer the obtained mixed solution to a 100mL hydrothermal reaction kettle, put the reaction kettle into a constant temperature oven, and after hydrothermal reaction at 240°C for 24 hours, let it cool down to room temperature naturally, and collect the solid product by centrifugation. And fully washed with deionized water, vacuum-dried 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%, and the multi- ...

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Abstract

The invention discloses a multi-edge WS2 / graphene electrochemical sodium storage composite electrode and a preparation method thereof. The chemical sodium storage active substance is a composite nano material of few-layer multi-edge WS2 nano sheet and graphene; the substance amount ratio of the WS2 to graphene in the composite nano material is 1 to 2; the composite electrode comprises the following components by weight percent: 80% of multi-edge WS2 nano sheet / graphene composite nano material, 10% of acetylene black, 5% of carboxymethyl cellulose and 5% of polyvinylidene fluoride. The preparation method comprises the following steps: preparing a few-layer multi-edge WS2 nano sheet / graphene composite nano material; blending the prepared composite nano material, acetylene black and polyvinylidene fluoride into uniform slurry; uniformly smearing the slurry on a copper foil serving as a current collector; and drying and rolling to obtain the multi-edge WS2 / graphene electrochemical sodium storage composite electrode. Through the invention, the prepared multi-edge WS2 / graphene electrochemical sodium storage composite electrode has high electrochemical sodium storage capacity.

Description

technical field [0001] The invention relates to an electrochemical sodium storage electrode and a preparation method thereof, in particular to a multi-edge WS 2 The invention relates to a graphene electrochemical sodium 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 batteri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/583
CPCB82Y30/00B82Y40/00H01M4/136H01M4/1397H01M4/366H01M4/5815H01M4/625H01M2004/021Y02E60/10
Inventor 陈卫祥陈涛马琳叶剑波王臻
Owner ZHEJIANG UNIV
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