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WS2 nano tile/graphene electrochemical sodium storage composite electrode and preparation method

A composite electrode, alkene electrochemical technology, applied in battery electrodes, nanotechnology, nanotechnology and other directions, to achieve the effect of strong mutual electrostatic interaction and strong hydrophobicity

Inactive Publication Date: 2014-10-08
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 Nanowatt / 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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  • WS2 nano tile/graphene electrochemical sodium storage composite electrode and preparation method
  • WS2 nano tile/graphene electrochemical sodium storage composite electrode and preparation method
  • WS2 nano tile/graphene electrochemical sodium storage composite electrode and preparation method

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Embodiment 1

[0024] 1) Ultrasonic disperse 2.5 mmol of graphene oxide in 60 mL of deionized water, then add 0.8 mmol of gemini surfactant N-dodecylpropylenediamine diammonium bromide, stir well, and then add 0.76g (6.25 mmol) L-cysteine ​​and 1.25 mmol ammonium thiotungstate, and keep stirring to completely dissolve L-cysteine ​​and ammonium thiotungstate, and adjust the volume to about 80 mL with deionized water;

[0025] 2) Transfer the obtained mixed solution into a 100 mL hydrothermal reaction kettle, put the reaction kettle into a constant temperature oven, and after hydrothermal reaction at 230 °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, dried in vacuum at 100 °C, and 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 of na...

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Abstract

The invention discloses a WS2 nano tile / graphene electrochemical sodium storage composite electrode and a preparation method. The electrochemical sodium storage active substance is a WS2 nano tile / graphene composite nano material; the substance amount ratio of the WS2 nano tile to graphene in the composite material is (1 to 1)-(1 to 3); the WS2 nano tile has few layers, and the average layer number is 4; the composite electrode comprises the following components by weight percent: 80% of WS2 nano tile / graphene composite nano material, 10% of acetylene black, 5% of carboxymethyl cellulose and 50% of polyvinylidene fluoride. The preparation method comprises the following steps: preparing a WS2 nano tile / graphene composite nano material, and blending the WS2 nano tile / graphene composite nano material with acetylene black and polyvinylidene fluoride to obtain a paste; uniformly smearing the paste on a copper foil serving as a current collector; and performing vacuum drying and rolling to obtain the electrochemical sodium storage nano material composite electrode. The composite electrode disclosed by the invention has high reversible sodium storage capacity, excellent cycle performance and enhanced multiplying power characteristic.

Description

technical field [0001] The present invention relates to a WS 2- Nanowatt / graphene electrochemical sodium storage composite electrode and its preparation method, especially involving the use of WS 2 The invention relates to a composite electrode prepared by a nanowatt / graphene composite nanomaterial and a preparation method thereof, belonging to the technical fields of inorganic composite nanomaterials and new energy applications. 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 no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/136H01M4/1397B82Y30/00B82Y40/00
CPCY02E60/122B82Y30/00B82Y40/00H01M4/136H01M4/1397H01M4/366H01M4/5815H01M4/625Y02E60/10
Inventor 陈卫祥黄国创王臻马琳叶剑波
Owner ZHEJIANG UNIV
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