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multi-edge mos 2 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: 2016-08-10
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 MoS 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 mos <sub>2</sub> Nanosheet/graphene electrochemical sodium storage composite electrode and preparation method
  • multi-edge mos <sub>2</sub> Nanosheet/graphene electrochemical sodium storage composite electrode and preparation method
  • multi-edge mos <sub>2</sub> Nanosheet/graphene electrochemical sodium 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 0.4 mL ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate (see figure 1 Schematic diagram), and fully stirred, and then sequentially added 0.76g (6.25 mmol) L-cysteine ​​and 0.3 g (1.25 mmol) sodium molybdate (Na 2 MoO 4 2H 2 O), and keep stirring to completely dissolve L-cysteine ​​and sodium molybdate, 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 ...

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Abstract

The invention discloses a multi-edge MoS2 / graphene electrochemical sodium storage composite electrode and a preparation method thereof. The electrochemical sodium storage active matter of the composite electrode is a few layers of multi-edge MoS2 nanosheets and graphene composite nano materials, the ratio of the amount of substance of MoS2 to graphene in the composite material is 1 to 2, and the composite electrode comprises the following components by weight percent: 80% of multi-edge MoS2 nanosheet / graphene composite nano material, 10% of acetylene black, 5% of carboxymethyl cellulose and 5% of polyvinylidene difluoride. The preparation method comprises the steps of preparing a few layers of multi-edge MoS2 nanosheet / graphene composite nano materials, blending the prepared composite nano material, acetylene black and polyvinylidene difluoride to form uniform slurry, uniformly coating a copper foil serving as a current collector with the slurry, drying and rolling to obtain the electrochemical sodium storage composite electrode. The prepared electrochemical sodium storage composite electrode has high electrochemical sodium storage volume.

Description

technical field [0001] The invention relates to an electrochemical sodium storage electrode and a preparation method thereof, in particular to a multi-edge MoS 2 The invention discloses a graphene electrochemical sodium storage composite electrode and a preparation method thereof, belonging to the technical field 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 mobile appliances such as mobile phones and notebook computers. As a power battery, lithium-ion batteries als...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/136H01M4/1397B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/136H01M4/1397H01M4/366H01M4/5815H01M4/625Y02E60/10
Inventor 陈卫祥马琳叶剑波王臻
Owner ZHEJIANG UNIV
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