Mo0.5W0.5S2 nano tile/graphene electrochemical lithium storage composite electrode and preparation method

A composite electrode, ene electrochemical technology, applied in the field of electrochemical lithium storage electrode and its preparation, to achieve the effect of strong mutual electrostatic interaction and strong hydrophobicity

Inactive Publication Date: 2014-10-15
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, so far, the electrochemical lithium storage composite electrode using Mo0.5W0.5S2 nanowatt / graphene composite nanomaterial as the electrochemical active material and its preparation have not been reported.

Method used

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  • Mo0.5W0.5S2 nano tile/graphene electrochemical lithium storage composite electrode and preparation method
  • Mo0.5W0.5S2 nano tile/graphene electrochemical lithium storage composite electrode and preparation method
  • Mo0.5W0.5S2 nano tile/graphene electrochemical lithium storage composite electrode and preparation method

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Embodiment 1

[0025] 1) Ultrasonically disperse 2.5 mmol graphene oxide in 60 mL deionized water, then add 0.8 mmol gemini surfactant N-dodecylpropylenediamine bisammonium bromide, stir well, and then add 0.76 g (6.25 mmol) L-cysteine, 0.625 mmol ammonium thiomolybdate and 0.625 mmol ammonium thiotungstate, and kept stirring to make L-cysteine, ammonium thiomolybdate and ammonium thiotungstate completely Dissolve and adjust the volume to about 80 mL with deionized water;

[0026] 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 ...

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Abstract

The invention discloses a Mo0.5W0.5S2 nano tile / graphene electrochemical lithium storage composite electrode and a preparation method thereof. The preparation method comprises the steps as follows: graphene oxide is subjected to ultrasonic dispersion in deionized water; a dimeric surfactant is added firstly and then L-cysteine, ammonium thiomolybdate and ammonium thiotungstate are sequentially added with stirring; the obtained hybrid dispersion is transferred to a hydrothermal reaction kettle to have a hydrothermal reaction for 20-24 hours at the temperature of 230 DEG C and is naturally cooled, and solid products are collected centrifugally, washed by deionized water, dried and subjected to thermal treatment to prepare the Mo0.5W0.5S2 nano tile / graphene composite nano material; and then the Mo0.5W0.5S2 nano tile / graphene composite nano material, acetylene black and polyvinylidene fluoride are prepared into slurry, copper foil is coated with the slurry, and the electrode is obtained through rolling. The prepared Mo0.5W0.5S2 nano tile / graphene electrochemical lithium storage composite electrode has high electrochemical lithium storage capacity, excellent cycle performance and enhanced magnification characteristic, thereby having wide application prospect.

Description

technical field [0001] The invention relates to an electrochemical lithium storage electrode and a preparation method thereof, in particular to Mo 0.5 W 0.5 S 2 The invention discloses a method for preparing a nanowatt / graphene electrochemical lithium storage composite electrode, which belongs 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 m...

Claims

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Application Information

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IPC IPC(8): H01M4/1397H01M4/136H01M4/1399H01M4/137B82Y30/00B82Y40/00
CPCY02E60/122B82Y30/00B82Y40/00H01M4/136H01M4/1397H01M4/366H01M4/5815H01M4/625H01M2004/021Y02E60/10
Inventor 陈卫祥马琳黄国创王臻叶剑波
Owner ZHEJIANG UNIV
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