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WS2 hole nano sheet/graphene electrochemical magnesium storage composite electrode and preparation method thereof

A composite electrode, alkene electrochemical technology, applied in battery electrodes, nanotechnology, nanotechnology and other directions, to achieve the effect of enhancing the performance of electrochemical magnesium storage

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

[0008] However, so far, with WS 2 Electrochemical magnesium 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 hole nano sheet/graphene electrochemical magnesium storage composite electrode and preparation method thereof
  • WS2 hole nano sheet/graphene electrochemical magnesium storage composite electrode and preparation method thereof
  • WS2 hole nano sheet/graphene electrochemical magnesium storage composite electrode and preparation method thereof

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Embodiment 1

[0023] 1) Disperse 2.5 mmol of graphene oxide in 60 mL of deionized water by ultrasonic, then add 0.12 mmol of cationic column[5]arene, stir well, and then add 0.76 g (6.25 mmol) of L-cysteine ​​and 1.25 mmol in sequence. 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;

[0024] 2) Transfer the obtained mixed solution to a 100 mL hydrothermal reactor, put the reactor into a constant temperature oven, and after the hydrothermal reaction at 230 °C for 24 h, let it naturally cool to room temperature, and collect the solid by centrifugation The product was fully washed with deionized water, dried under 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 Porous nanosheet / graphene composite nanomaterials, WS in c...

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Abstract

The invention discloses a WS2 hole nano sheet / graphene electrochemical magnesium storage composite electrode and a preparation method thereof. The electrochemical magnesium storage active substance is a WS2 hole nano sheet / graphene composite nano material; the substance amount ratio of the WS2 hole nano sheet to graphene in the composite nano material is (1 to 1)-(1 to 3); the WS2 hole nano sheet has few layers; the composite electrode comprises the following components by weight percent: 80% of WS2 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 WS2 hole nano sheet / graphene composite nano material; blending the prepared composite nano material with the acetylene black, carboxymethyl cellulose and polyvinylidene fluoride to obtain slurry; smearing the slurry on a current collector; and drying and rolling to obtain the WS2 hole nano sheet / graphene electrochemical magnesium storage composite electrode. The composite nano material electrochemical magnesium storage composite electrode disclosed by the invention has high reversible magnesium storage capacity and wide application prospect.

Description

technical field [0001] The invention relates to an electrochemical magnesium storage composite electrode and a preparation method thereof, in particular to WS 2 A porous nanosheet / graphene electrochemical magnesium storage composite electrode and a preparation method thereof belong to the technical fields of new energy materials, energy storage and conversion. [0002] Background technique [0003] 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. Conventional secondary batteries, such as lead-acid batteries, are limited in their application due to the presence of the harmful metal element Pb. 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 power batteries, lithium-ion ...

Claims

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Application Information

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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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