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mos 2 Nanosheet/graphene electrochemical sodium storage composite electrode with holes and preparation method thereof

A composite electrode, ene electrochemical technology, applied in battery electrodes, non-aqueous electrolyte battery electrodes, nanotechnology, etc.

Inactive Publication Date: 2016-08-24
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 MoS 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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  • mos <sub>2</sub> Nanosheet/graphene electrochemical sodium storage composite electrode with holes and preparation method thereof
  • mos <sub>2</sub> Nanosheet/graphene electrochemical sodium storage composite electrode with holes and preparation method thereof
  • mos <sub>2</sub> Nanosheet/graphene electrochemical sodium storage composite electrode with holes and preparation method thereof

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Embodiment 1

[0023] 1) Ultrasonically disperse 2.5 mmol graphene oxide in 60 mL deionized water, then add 0.08 mmol cationic column[5]arene supermolecule, and stir well, then add 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;

[0024] 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 MoS was prepared. 2 Composite nanomaterials with hole nanos...

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Abstract

The invention discloses a MoS2 hole nano sheet / graphene electrochemical sodium storage composite electrode and a preparation method. The electrochemical sodium storage active substance is a MoS2 hole nano sheet / graphene composite nano material; the substance amount ratio of the MoS2 hole nano sheet to graphene in the composite nano material is (1 to 1)-(1 to 3); the MoS2 hole nano sheet has a single layer and few layers; the composite electrode comprises the following components by weight percent: 80% of MoS2 hole 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 MoS2 hole nano sheet / graphene composite nano material, and blending the MoS2 hole nano sheet / graphene composite nano material with acetylene black, carboxymethyl cellulose and polyvinylidene fluoride to obtain slurry; smearing the slurry on a current collector; and drying and rolling to obtain the MoS2 hole nano sheet / graphene electrochemical sodium storage composite electrode. The composite electrode disclosed by the invention has high reversible sodium storage capacity, excellent cycle performance, enhanced multiplying power characteristic and wide application prospect.

Description

technical field [0001] The invention relates to an electrochemical sodium storage electrode and a preparation method thereof, in particular to the use of MoS 2 The invention discloses an electrochemical sodium storage composite electrode prepared by nanosheets / graphene with holes 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 b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/13H01M4/139
CPCB82Y30/00B82Y40/00H01M4/136H01M4/1397H01M4/366H01M4/5815H01M4/625H01M2004/021Y02E60/10
Inventor 陈卫祥马琳叶剑波王臻
Owner ZHEJIANG UNIV
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