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Metal sulfide/carbon composite material, preparation method and application thereof in battery negative electrode material

A technology of metal sulfide and carbon composite materials, applied in battery electrodes, active material electrodes, nanotechnology for materials and surface science, etc., can solve the problems of not being able to take into account low cost at the same time, achieve excellent structural stability, improve Cycle life, simple and unique effect of preparation process

Active Publication Date: 2022-01-18
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the technical problem that the metal sulfide / carbon composite material in the prior art cannot simultaneously take into account the two important industrialization indicators of low cost, environmentally friendly preparation route and high electrochemical performance, the present invention firstly provides a novel structure Metal sulfide / carbon mesh composites with high ionic and electronic conductivity and strong structural stability

Method used

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  • Metal sulfide/carbon composite material, preparation method and application thereof in battery negative electrode material
  • Metal sulfide/carbon composite material, preparation method and application thereof in battery negative electrode material
  • Metal sulfide/carbon composite material, preparation method and application thereof in battery negative electrode material

Examples

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Effect test

Embodiment 1

[0039] A kind of preparation method of molybdenum disulfide / carbon composite material, comprises steps as follows:

[0040] (1) Pretreatment of bagasse: crush 5 g of bagasse raw material, add 250 mL of sulfuric acid with a concentration of 1 mol / L to wash away impurities, heat at 80°C for 2 hours, wash with water, filter, and then add 250 mL of sulfuric acid with a concentration of In 10wt% sodium hydroxide solution, mix evenly and then heat, the heating temperature is 90°C, and the heating time is 3h, then wash with water, wash with alcohol, filter and dry to obtain the bagasse precursor.

[0041] (2) Take 1 g of the bagasse precursor prepared in step (1) and add it to 60 mL of water to disperse, add 2 mmol of sodium molybdate and 8 mmol of thiourea, adjust the pH to 7, stir and mix well, then carry out hydrothermal reaction, and the reaction temperature is 200 °C, the reaction time is 24h, the product is washed with water, washed with alcohol, filtered and dried.

[0042] (...

Embodiment 2

[0053] A kind of preparation method of molybdenum disulfide / carbon composite material, comprises steps as follows:

[0054] (1) Pretreatment of bagasse: crush 5 g of bagasse raw material, add 250 mL of sulfuric acid with a concentration of 1 mol / L to wash away impurities, heat at 80°C for 2 hours, wash with water, filter, and then add 250 mL of sulfuric acid with a concentration of In 10wt% sodium hydroxide solution, mix evenly and then heat, the heating temperature is 90°C, and the heating time is 3h, then wash with water, wash with alcohol, filter and dry to obtain the bagasse precursor.

[0055] (2) Take 1 g of the bagasse precursor prepared in step (1) and add it to 60 mL of water to disperse, add 1 mmol of sodium molybdate and 4 mmol of thiourea, adjust the pH to 7, stir and mix well, then carry out hydrothermal reaction, and the reaction temperature is 200 °C, the reaction time is 24h, the product is washed with water, washed with alcohol, filtered and dried.

[0056] (...

Embodiment 3

[0059] A kind of preparation method of molybdenum disulfide / carbon composite material, comprises steps as follows:

[0060] (1) Pretreatment of corn cob: crush 5 g of corn cob raw material, add 300 mL of potassium hydroxide solution with a concentration of 5 wt %, mix well and heat, the heating temperature is 100 ° C, and the heating time is 2 h, then wash with water, alcohol washing, filtering and drying to obtain the corn cob precursor.

[0061] (2) Add 1.5 g of the corncob precursor prepared in step (1) into 60 mL of water to disperse, then add 2 mmol of sodium molybdate and 8 mmol of L-cysteine, adjust the pH to 6, stir and mix evenly, and conduct hydrothermal Reaction, the reaction temperature is 160°C, the reaction time is 24h, and the product is washed with water, washed with alcohol, filtered and dried.

[0062] (3) The mixture prepared in step (2) was placed in a tube furnace and heated under argon at a heating temperature of 500° C. for a heating time of 5 hours. The ...

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Abstract

A metal sulfide / carbon composite material, a preparation method and its application in battery negative electrode materials relate to the technical field of battery electrode material preparation. The metal sulfide / carbon network composite material prepared by using straw as a precursor has a flower-like or sheet-like nanoscale metal sulfide uniformly loaded in the carbon network. With the different proportions of metal sulfides in the composites, the morphology of the metal sulfides in the product also showed differences. The composite material with this structure has high ionic and electronic conductivity, and has excellent structural stability, which is conducive to improving the rate performance and cycle life of the material. The metal sulfide / carbon composite material was used as the negative electrode material of sodium ion battery, and assembled into a battery for testing. It is an ideal anode material for sodium-ion batteries with application prospects.

Description

technical field [0001] The invention relates to the technical field of battery electrode material preparation, in particular to a metal sulfide / carbon composite material, a preparation method and its application in battery negative electrode materials. Background technique [0002] With the widespread application of lithium-ion batteries in electric vehicles, the cost and storage of related raw materials are facing severe problems. Because of the abundant reserves of sodium on the earth, it accounts for 2.36% of the earth's crust, which is more than 1000 times that of lithium resources (0.0017%). Relatively cheap sodium-ion batteries (NIBs) have gradually attracted widespread attention from the global industry. Moreover, lithium and sodium belong to the first main group and have similar physical and chemical properties. NIB is currently the most promising new energy storage system to replace traditional lithium-ion batteries. Transition metal sulfides, as a class of NIB an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054B82Y30/00
CPCH01M4/362H01M4/5815H01M4/625H01M10/054B82Y30/00H01M2004/021H01M2004/027Y02E60/10
Inventor 王黎丽董强邓崇海胡磊杨伟胡文婷
Owner HEFEI UNIV
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