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A high-capacity and cycle-stable electrochemical magnesium storage composite electrode and its preparation method

A composite electrode and electrochemical technology, applied in the direction of electrode manufacturing, battery electrodes, electrode collector coating, etc., to achieve the effect of strong hydrophobicity and strong electrostatic interaction

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 MoS 2 Nanowatt / graphene composite nanomaterials as electrochemically active materials for electrochemical magnesium storage composite electrodes and their preparation have not been reported yet

Method used

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  • A high-capacity and cycle-stable electrochemical magnesium storage composite electrode and its preparation method
  • A high-capacity and cycle-stable electrochemical magnesium storage composite electrode and its preparation method
  • A high-capacity and cycle-stable electrochemical magnesium storage composite electrode and its preparation method

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Embodiment 1

[0026] 1) Ultrasonic disperse 2.5mmol graphene oxide in 60mL deionized water, then add 0.8mmol gemini surfactant N-dodecylpropylenediamine diammonium bromide, and stir well, then add 0.76g ( 6.25mmol) L-cysteine ​​and 0.3g (1.25mmol) sodium molybdate (Na 2 MoO 4 2H 2 O), and keep stirring to completely dissolve L-cysteine ​​and sodium molybdate, adjust the volume to about 80mL with deionized water;

[0027] 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, and the volume fraction of hydrogen in the mixed gas was 10%, and MoS was prepared. 2 Composite nanomaterials of nanowat...

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Abstract

The invention discloses a high-capacity and stable-cycle electrochemical magnesium storage composite electrode and a preparation method thereof, wherein an electrochemical magnesium storage active substance is a MoS2 nano-tile / graphene composite nanomaterial; the ratio of the amount of substance of MoS2 nano-tile to graphene in the composite nanomaterial is (1:1) to (1:3); the MoS2 nano-tile has a layered structure with few layers and averagely has 4-5 layers; the composite electrode comprises the following components by weight percent: 80% of the MoS2 nano-tile / graphene composite nanomaterial, 10% of acetylene black, 5% of carboxymethyl cellulose and 5% of polyvinylidene fluoride. The preparation method comprises the steps of firstly, preparing the MoS2 nano-tile / graphene composite nanomaterial, mixing the obtained composite nanomaterial with the acetylene black and the polyvinylidene fluoride to prepare paste, evenly coating foamy copper serving as a current collector with the paste, carrying out vacuum drying, and rolling to obtain the electrochemical magnesium storage composite electrode. The electrochemical magnesium storage composite electrode has the high reversible magnesium storage capacity and can be widely applied.

Description

technical field [0001] The invention relates to an electrochemical magnesium storage electrode and a preparation method thereof, in particular to MoS 2 The invention relates to a preparation method of a nanowatt / graphene electrochemical magnesium storage composite electrode, which belongs to the technical field of new energy application. 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 also have broad application prospe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/60H01M4/46H01M4/38
CPCB82Y30/00H01M4/0404H01M4/366H01M4/5815H01M4/625H01M2004/021Y02E60/10
Inventor 陈卫祥马琳黄国创王臻叶剑波
Owner ZHEJIANG UNIV
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