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Multi-edge MoS2 nanosheet/graphene electrochemical lithium storage composite electrode and preparation method thereof

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

Inactive Publication Date: 2014-10-29
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 MoS 2 Nanosheet / graphene composite nanomaterials as electrochemically active materials for electrochemical lithium storage composite electrodes and their preparation have not been reported yet

Method used

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  • Multi-edge MoS2 nanosheet/graphene electrochemical lithium storage composite electrode and preparation method thereof
  • Multi-edge MoS2 nanosheet/graphene electrochemical lithium storage composite electrode and preparation method thereof
  • Multi-edge MoS2 nanosheet/graphene electrochemical lithium storage composite electrode and preparation method thereof

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Embodiment 1

[0027] 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 0.76 g (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;

[0028] 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 i...

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Abstract

The invention discloses a multi-edge MoS2 / graphene electrochemical lithium storage composite electrode and a preparation method thereof. The electrochemical lithium storage active matter of the composite electrode is a few layers of multi-edge MoS2 nanosheets and graphene composite nano material, the ratio of the amount of substance of MoS2 to graphene in the composite nano material is 1 to 2, and the composite electrode comprises the following components by weight percent: 80-85% of multi-edge MoS2 nanosheet / graphene composite nano material, 5-10% of acetylene black and 5-10% of polyvinylidene difluoride. The preparation method comprises the steps of preparing a few layers of multi-edge MoS2 nanosheet / graphene composite nano material, blending the prepared composite nano material, acetylene black and polyvinylidene difluoride to form uniform slurry, uniformly coating a copper foil with the slurry, and rolling to obtain the composite electrode. The prepared multi-edge MoS2 / graphene electrochemical lithium storage composite electrode has high electrochemical lithium storage volume.

Description

technical field [0001] The invention relates to an electrochemical lithium storage electrode and a preparation method thereof, in particular to a multi-edge MoS 2 The invention relates to a graphene electrochemical lithium 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] 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 also have broad application prospects in electric bicycles, electric vehicles and smart grids. At present, graphite materials (such as: graphite microspheres, natural modified graphite and artificial graphite, etc.) are mainly used as negative electrode materials for lithium-ion batteries. These graphite ...

Claims

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Application Information

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IPC IPC(8): H01M4/136H01M4/1397B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/136H01M4/1397H01M4/366H01M4/5815H01M4/625Y02E60/10
Inventor 陈涛陈卫祥马琳孙虎叶剑波王臻
Owner ZHEJIANG UNIV
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