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WS2 porous nanosheet/graphene electrochemical sodium storage composite electrode and preparation method

A composite electrode, ene electrochemical technology, applied in battery electrodes, nanotechnology, nanotechnology, etc.

Inactive Publication Date: 2016-06-22
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 WS 2 Electrochemical sodium storage composite electrodes with porous nanosheets / graphene composite nanomaterials as electrochemically active substances and their preparation have not been reported yet

Method used

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  • WS2 porous nanosheet/graphene electrochemical sodium storage composite electrode and preparation method
  • WS2 porous nanosheet/graphene electrochemical sodium storage composite electrode and preparation method
  • WS2 porous nanosheet/graphene electrochemical sodium storage composite electrode and preparation method

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Embodiment 1

[0024] 1) Ultrasonic disperse 2.5mmol of graphene oxide in 60mL of deionized water, then add 0.16mmol of cationic pillar[5]arene supermolecule, and stir well, then add 0.76g (6.25mmol) of L-cysteine ​​and 1.25mmol ammonium thiotungstate, and keep stirring to completely dissolve L-cysteine ​​and ammonium thiotungstate, adjust the volume to about 80mL with deionized water;

[0025] 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 230°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 solid product was heat-treated at 800 °C for 2 h in a nitrogen / hydrogen mixed atmosphere, the volume fraction of hydrogen in the mixed gas was 10%, and WS was prepared. 2 Composite nanomaterials with hole nanosheets / graphene, WS in composite...

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Abstract

The invention discloses a WS2 perforated nanosheet / graphene electrochemical sodium storage composite electrode and a preparation method thereof. An electrochemical sodium storage active substance of the WS2 perforated nanosheet / graphene electrochemical sodium storage composite electrode adopts a WS2 perforated nanosheet / graphene composite nanomaterial, a substance ratio of the WS2 perforated nanosheets to graphene is (1:1)-(1:3), a few layers of the WS2 perforated nanosheets are provided, and the composite electrode comprises components in percentage by mass as follows: 80% of the WS2 perforated 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 WS2 perforated nanosheet / graphene composite nanomaterial is prepared firstly and is prepared into slurry with acetylene black, carboxymethyl cellulose and polyvinylidene fluoride, a current collector is coated with the slurry, and after the slurry is dried and rolled, the WS2 perforated nanosheet / graphene electrochemical sodium storage composite electrode is obtained. The electrochemical sodium storage composite electrode has high reversible sodium storage capacity, excellent cycle performance and enhanced magnification characteristic, thereby having wide application prospect in a novel sodium-ion battery.

Description

technical field [0001] The present invention relates to a WS 2- Nanosheet / graphene electrochemical sodium storage composite electrode with holes and preparation method thereof, especially involving the use of WS 2 The invention relates to an electrochemical sodium storage composite electrode prepared by a porous nanosheet / graphene composite nanomaterial and a preparation method thereof, belonging to the technical fields of new energy materials, 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 ...

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 陈卫祥叶剑波马琳王臻
Owner ZHEJIANG UNIV
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