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WS2 porous nanosheet/graphene electrochemical magnesium storage composite electrode and preparation method

A composite electrode, ene electrochemical technology, applied in the direction of battery electrodes, nanotechnology, nanotechnology, etc., to achieve the effect of enhancing the performance of electrochemical magnesium storage

Inactive Publication Date: 2016-05-25
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 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 porous nanosheet/graphene electrochemical magnesium storage composite electrode and preparation method
  • WS2 porous nanosheet/graphene electrochemical magnesium storage composite electrode and preparation method
  • WS2 porous nanosheet/graphene electrochemical magnesium storage composite electrode and preparation method

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Embodiment 1

[0022] 1) Ultrasonic disperse 2.5mmol graphene oxide in 60mL deionized water, then add 0.12mmol cationic pillar [5] aromatic hydrocarbon, and stir well, then add 0.76g (6.25mmol) L-cysteine ​​and 1.25mmol Ammonium thiotungstate, and keep stirring to completely dissolve L-cysteine ​​and ammonium thiotungstate, adjust the volume to about 80mL with deionized water;

[0023] 2) Transfer the obtained mixed solution to a 100mL hydrothermal reaction kettle, put the reaction kettle into a constant temperature oven, and after hydrothermal reaction at 230°C for 24 hours, let it cool down to room temperature naturally, and collect the solid product by centrifugation. And fully washed with deionized water, vacuum dried at 100 °C, 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 with hole nanosheets / graphene, WS in composite nanomate...

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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 The invention relates to a porous nanosheet / graphene electrochemical magnesium storage composite electrode and a preparation method thereof, which belong 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, li...

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 陈卫祥黄国创王臻马琳叶剑波
Owner ZHEJIANG UNIV
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