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Antimony molybdenum sulfide-carbon composite material and preparation method and application thereof

A carbon composite material, sulfide technology, applied in antimony compounds, chemical instruments and methods, carbon preparation/purification, etc., can solve the problem of low conductivity, high volume expansion coefficient, metal sulfide cycle performance and rate performance deterioration and other problems, to achieve the effect of increasing electrical conductivity and large specific surface area

Active Publication Date: 2021-12-03
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, metal sulfide anode materials also have many problems, such as low conductivity and high volume expansion coefficient, which lead to poor cycle performance and rate performance of metal sulfides.

Method used

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  • Antimony molybdenum sulfide-carbon composite material and preparation method and application thereof
  • Antimony molybdenum sulfide-carbon composite material and preparation method and application thereof
  • Antimony molybdenum sulfide-carbon composite material and preparation method and application thereof

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preparation example Construction

[0028] A preparation method of antimony molybdenum sulfide-carbon composite material, comprising the steps of:

[0029] 1) Preparation of antimony sulfide: Dissolve antimony chloride, chelating agent and sulfur source in the reaction solution according to a certain ratio, stir evenly, move to the inner lining of the autoclave, and react at 160-220°C for 10-16h, react After the end, the product is centrifuged, washed, and dried to obtain antimony sulfide; the chelating agent is cetyltrimethylammonium bromide, sodium dodecylbenzenesulfonate, polyvinylpyrrolidone, and sodium dodecylsulfonate. At least one; the sulfur source is at least one of sodium sulfide, thiourea, and sodium thiosulfate; the carbon source is at least one of glucose, sucrose, ascorbic acid, and melamine. The reaction solution is prepared by mixing dimethyl phthalate, deionized water, and ethylene glycol in a volume ratio of 10-40:30-60:20-60. When antimony chloride is measured in 5 mmol, the total mass of the...

Embodiment 1

[0033] Weigh 1.14g of Sbcl with a balance 3 , 0.3g of CTAB, 0.2g of SDBS, 1.2g of sodium sulfide, 0.38g of thiourea. Transfer it into a beaker with a volume of 100mL, then add 30mL of deionized water, 25mL of DMP, and 20mL of ethylene glycol, and stir magnetically for 10min at a speed of 260r / min. Then the mixture was transferred to a 100 mL reactor lining, and reacted at 180° C. for 13 h. After the reaction, the reactor was left to stand, and the upper layer liquid was removed, and the centrifuge was used to wash three times with deionized water and two times with ethanol at a speed of 7000r / min, and then dried in a vacuum oven at 80°C for 10 hours.

[0034] Weigh 0.4g of Sb with a balance 2 S 3 , the sodium molybdate of 0.2g, the sodium sulfide of 0.24g, the thiourea of ​​0.228g, the glucose of 0.1g, the sucrose of 0.3g. Transfer it into a beaker with a volume of 100mL, then add 30mL of deionized water, 10mL of DMP, and 35mL of ethylene glycol, and stir magnetically for ...

Embodiment 2

[0038] Weigh 1.14g of Sbcl with a balance 3 , 0.2g of PVP, 0.2g of SDBS, 0.96g of sodium sulfide, 0.74g of sodium thiosulfate. Transfer it into a beaker with a volume of 100mL, then add 40mL of deionized water, 15mL of DMP, and 20mL of ethylene glycol, and stir magnetically for 20min at a speed of 210r / min. Then the mixture was transferred to a 100 mL reactor lining, and reacted at 200° C. for 12 h. After the reaction, the reactor was left to stand, and the upper layer liquid was removed, and the centrifuge was used to wash three times with deionized water and two times with ethanol at a speed of 7000r / min, and then dried in a vacuum oven at 80°C for 10 hours.

[0039] Weigh 0.5g of Sb with a balance 2 S 3 , 0.3g of sodium molybdate, 0.48g of sodium sulfide, 0.5g of sodium thiosulfate, 0.2g of glucose, 0.2g of ascorbic acid. Move it into a beaker with a volume of 100mL, then add 35mL of deionized water, 20mL of DMP, and 20mL of ethylene glycol, and stir magnetically for 20...

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Abstract

The invention relates to the technical field of new-energy electrode material preparation, in particular to an antimony molybdenum sulfide-carbon composite material and a preparation method and application thereof. The preparation method comprises the following steps: 1) preparation of antimony sulfide: dissolving antimony chloride, a chelating agent and a sulfur source in a reaction solution, carrying out uniform mixing through stirring, transferring the obtained mixture to a high-pressure reaction kettle lining, conducting a reaction at a temperature of 160-220 DEG C for 10-16 h, and after the reaction is finished, centrifuging, washing and drying a product to obtain antimony sulfide; and 2) preparation of antimony molybdenum sulfide-carbon: adding the obtained antimony sulfide serving as a precursor, sodium molybdate dehydrate serving as a molybdenum source, a sulfur source and a carbon source into a reaction solution together, conducting uniform stirring, transferring the formed mixture to the high-pressure reaction kettle lining, carrying out reacting at 160-220 DEG C for 10-16 hours, and after the reaction is finished, centrifuging, washing and drying the product, carrying out calcining at high temperature in argon flow, and washing and drying the calcined product. According to the invention, a solvothermal process is adopted to synthesize antimony sulfide, and the antimony-molybdenum sulfide-carbon composite material is synthesized by taking the antimony sulfide as a template through a secondary solvothermal process in combination with a high-temperature calcination method.

Description

technical field [0001] The invention relates to the technical field of preparation of new energy electrode materials, in particular to an antimony molybdenum sulfide-carbon composite material and its preparation method and application. Background technique [0002] At present, whether it is experimental research or commercial use, graphite is still widely used as an anode material for lithium-ion batteries, but its low theoretical specific capacity (372mAh / g) will affect the performance of lithium batteries. Secondly, improper battery assembly or use will generate dendrites locally in graphite, resulting in impaired battery performance. Compared with graphite materials, the use of metal sulfides as anode materials for lithium-ion batteries has great advantages: such as larger specific capacity, better conductivity, and better cycle stability. [0003] Metal sulfides with a layered structure include materials such as molybdenum sulfide, tungsten sulfide, tin sulfide, and tit...

Claims

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Application Information

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IPC IPC(8): C01G30/00C01G39/06C01B32/05H01M4/58H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCC01G30/008C01G39/06C01B32/05H01M4/5815H01M4/625H01M10/0525B82Y30/00B82Y40/00C01P2002/72C01P2004/03C01P2006/40C01P2004/80Y02E60/10
Inventor 李俊哲孙文超汪超连玮豪秦清清
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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