Molybdenum disulfide/mesoporous carbon composite electrode material as well as preparation method and application thereof

A technology of molybdenum disulfide and composite electrodes, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of limited electrochemical performance and low electronic conductivity, and achieve excellent electrochemical performance, improved conductivity, and excellent rate Effects on performance and cycle stability

Active Publication Date: 2014-07-09
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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  • Molybdenum disulfide/mesoporous carbon composite electrode material as well as preparation method and application thereof
  • Molybdenum disulfide/mesoporous carbon composite electrode material as well as preparation method and application thereof
  • Molybdenum disulfide/mesoporous carbon composite electrode material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0025] The obtained product was subjected to high-temperature carbonization in an argon atmosphere, and reacted at 600°C for 2 hours to obtain a molybdenum disulfide / mesoporous carbon composite electrode material, that is, a nano-h...

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 value to less than 1 with nitric acid, stir evenly, and heat at 160°C Carry out hydrothermal reaction for 30h, wash and collect the reaction product after cooling to room temperature.

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

[0030] The obtained product was subjected to high-temperature carbonization in an argon atmosphere, and reacted at 850° C. for 34 hours to obtain a nano-hybrid material in which mesoporous carbon was embedded between...

Embodiment 3

[0032] Dissolve 3.0g sodium oleate, 2.0g sodium molybdate, and 2.0g thiourea in a mixed solvent of 30ml deionized water, 30g ethanol and 2ml oleic acid, adjust the pH value to less than 1 with nitric acid, stir evenly, and °C for hydrothermal reaction for 36 h, after cooling to room temperature, wash and collect the reaction product.

[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, sonicate for 90min and cool to room temperature, add 500mg of dopamine while stirring, The reaction was stirred at 40°C for 24 hours, and the reaction product was collected by filtration and centrifugation.

[0034] The obtained product was subjected to high-temperature carbonization in an argon atmosphere, and reacted at 900° C. for 4 hours to obtain a nano-hybrid material with mesoporous carbon intercalated between molybdenum disulfide layers. The electr...

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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, and relates to a lithium-ion battery electrode material and its preparation method and application, in particular to a nano-hybrid material in which mesoporous carbon is embedded between molybdenum disulfide layers. Background technique [0002] Lithium-ion batteries occupy an increasingly important position in portable electronic devices, electric vehicles and other fields because of their advantages such as large energy density and long cycle life. However, with the development of science and technology, people have put forward higher requirements on the performance of lithium-ion batteries for energy storage devices. Electrode materials are one of the key issues that need to be solved for lithium-ion batteries. Carbon materials are currently the preferred anode materials for commercial lithium-ion batteries due to their lower cost and longer cycle life. However, the low initial charge-dis...

Claims

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Application Information

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Patent Type & Authority Applications(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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