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A kind of molybdenum disulfide/mesoporous carbon composite electrode material and its preparation method and application

A technology of molybdenum disulfide and electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as limited electrochemical performance and low electronic conductivity, and achieve excellent electrochemical performance, improved conductivity, and high power performance effect

Active Publication Date: 2016-04-06
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low electronic conductivity of molybdenum disulfide also limits the improvement of its electrochemical performance

Method used

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  • A kind of molybdenum disulfide/mesoporous carbon composite electrode material and its preparation method and application
  • A kind of molybdenum disulfide/mesoporous carbon composite electrode material and its preparation method and application
  • A kind of molybdenum disulfide/mesoporous carbon composite electrode material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Dissolve 1.5g of sodium oleate, 1.0g of sodium molybdate, and 0.9g of thiourea in a mixed solvent of 15ml of deionized water, 15ml of ethanol and 2ml of oleic acid, adjust the pH to less than 1 with nitric acid, stir evenly, and at 140 The hydrothermal reaction was carried out at ℃ for 24 h, cooled to room temperature, washed and the reaction product was collected.

[0024] Dissolve 0.2g of P123 in 200ml of water, then add 0.25g of tromethamine and stir to obtain a buffer solution, then disperse the above reaction product in 200ml of the buffer solution, cool to room temperature after ultrasonication for 30min, add 250mg of dopamine while stirring, The reaction was stirred at 10 °C for 3 h, and the reaction product was collected by filtration, centrifugation and washing.

[0025] The obtained product was carbonized at high temperature in an argon atmosphere, and reacted at 600 °C for 2 h to obtain a molybdenum disulfide / mesoporous carbon composite electrode material, th...

Embodiment 2

[0028] Dissolve 2g of sodium oleate, 1.5g of sodium molybdate, and 1.4g of thiourea in a mixed solvent of 20ml of deionized water, 20ml of ethanol and 3ml of oleic acid, adjust the pH to less than 1 with nitric acid, stir evenly, and heat at 160°C. The hydrothermal reaction was carried out for 30 h, and the reaction product was washed and collected after cooling to room temperature.

[0029] Dissolve 0.3 g of P123 in 300 ml of water, then add 0.5 g of tromethamine and stir to obtain a buffer solution, then disperse the above-mentioned product in 100 ml of the buffer solution, cool to room temperature after ultrasonication for 60 min, add 350 mg of dopamine while stirring, and 250 mg of dopamine. The reaction was stirred at °C for 16 h, and the reaction product was collected by filtration, centrifugation and washing.

[0030] The obtained product was carbonized at high temperature in an argon atmosphere, and reacted at 850 °C for 34 h to obtain a nano-hybrid material with mesop...

Embodiment 3

[0032] Dissolve 3.0g of sodium oleate, 2.0g of sodium molybdate, and 2.0g of thiourea in a mixed solvent of 30ml of deionized water, 30ml of ethanol and 2ml of oleic acid, adjust the pH value to less than 1 with nitric acid, stir well, and set it at 180 The hydrothermal reaction was carried out at ℃ for 36 h, and the reaction product was washed and collected after cooling to room temperature.

[0033] Dissolve 0.6g of P123 in 600ml of water, then add 0.75g of tromethamine and stir to obtain a buffer solution, then disperse the above-mentioned product in 200ml of the buffer solution, cool to room temperature after ultrasonication for 90min, add 500mg of dopamine while stirring, 40 The reaction was stirred at °C for 24 h, and the reaction product was collected by filtration, centrifugation and washing.

[0034] The obtained product was carbonized at high temperature in an argon atmosphere, and reacted at 900 °C for 4 h to obtain a nano-hybrid material with mesoporous carbon inte...

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Abstract

The invention discloses a molybdenum disulfide / mesoporous carbon composite electrode material as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing an oleic acid molecule intercalation molybdenum disulfide precursor through a hydrothermal reaction by adopting oleic acid and sodium oleate as a structure-directing agent and sodium molybdate and thiourea as a molybdenum source and a sulfur source; introducing dopamine into an interlayer by virtue of a chemical reaction of dopamine and oleic acid molecules; self-polymerizing molybdenum disulfide interlayer dopamine to form poly(dopamine) by adopting a tri-block copolymer, polyoxyethylene-polypropylene oxide-polyxyethylene, as a soft template, and then performing a high-temperature carbonization process to prepare the mesoporous carbon-embedded molybdenum disulfide interlayer nano hybrid material. By embedding mesoporous carbon, not only can the interlayer distance of molybdenum disulfide be increased and the re-accumulation of nano-sheets be effectively prevented, but also the electronic conductivity of molybdenum disulfide can be remarkably improved. An electrochemical test result proves that as a lithium ion battery negative material, the molybdenum disulfide / mesoporous carbon composite electrode material has high specific capacity, excellent rate performance and excellent cycling performance, and can be widely applied to the field of lithium ion batteries.

Description

technical field [0001] The invention relates to the field of new energy materials, relates to a lithium ion battery electrode material and a preparation method and application thereof, in particular to a nano-hybrid material with mesoporous carbon intercalated between molybdenum disulfide layers. Background technique [0002] Lithium-ion batteries occupy an increasingly important position in the fields of portable electronic devices and electric vehicles due to their advantages of high energy density and long cycle life. However, with the development of science and technology, people have put forward higher requirements for the performance of lithium-ion batteries of energy storage devices. Electrode materials are one of the key issues to be solved in lithium-ion batteries. Carbon materials have become the first choice of anode materials for commercial lithium-ion batteries due to their low cost and long cycle life. However, the shortcomings of carbon materials, such as lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M4/58
CPCH01M4/362H01M4/58H01M4/625H01M10/0525Y02E60/10
Inventor 江浩李春忠任大勇景世龙贾贵奇
Owner EAST CHINA UNIV OF SCI & TECH
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