Antimony cobalt sulfide-carbon composite nanorod and preparation method and application thereof

A nanorod, sulfide technology, applied in cobalt compounds, chemical instruments and methods, carbon preparation/purification, etc., can solve the problem of low electrical conductivity, high volume expansion coefficient, metal sulfide cycle performance and rate performance deterioration, etc. problem, to achieve the effect of high conductivity, increased reaction interface, and superior performance

Active Publication Date: 2021-12-03
ANHUI UNIVERSITY OF TECHNOLOGY
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  • 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 volu

Method used

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  • Antimony cobalt sulfide-carbon composite nanorod and preparation method and application thereof
  • Antimony cobalt sulfide-carbon composite nanorod and preparation method and application thereof
  • Antimony cobalt sulfide-carbon composite nanorod and preparation method and application thereof

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preparation example Construction

[0029] A preparation method of antimony cobalt sulfide-carbon composite nanorods, comprising the steps of:

[0030] 1) Preparation of antimony sulfide nanorods: Dissolve antimony chloride, chelating agent and sulfur source in the reaction solution according to a certain ratio, stir evenly, move to the lining of the autoclave, and react at 170-210°C for 8-14h After the reaction, the product was centrifuged, washed, and dried to obtain antimony sulfide nanorods; the chelating agent was hexadecyltrimethylammonium bromide, sodium dodecylbenzenesulfonate, polyvinylpyrrolidone, At least one of sodium sulfide; 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 10-20:30-40:20-45. When the amount of antimony chloride is 1.37g, the total mass of th...

Embodiment 1

[0034] Weigh 1.37g of Sbcl with a balance 3 , 0.3g of SDBS, 0.3g of PVP, 1.37g of thiourea. Move it into a beaker with a volume of 100mL, then add 35mL of deionized water and 40mL 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 200 °C for 10 h. After the reaction, the reactor was left to stand, and the supernatant liquid was removed, and the centrifuge was used to wash three times with deionized water and two times with ethanol at a speed of 8000r / min, and then dried in a vacuum oven at 80°C for 10 hours.

[0035] Weigh 0.5g of Sb with a balance 2 S 3, 0.3g of cobalt nitrate hexahydrate, 0.228g of thiourea, 0.1g of glucose, 0.2g of sucrose. Move it into a beaker with a volume of 100mL, then add 30mL of deionized water and 45mL of ethylene glycol, and stir magnetically for 15min at a speed of 240r / min. Then the mixture was transferred to a 100 mL reactor lining and reacte...

Embodiment 2

[0039] Weigh 1.37g of Sbcl with a balance 3 , 0.4g of CTAB, 0.2g of SDBS, 2.16g of sodium sulfide nonahydrate, 0.685g of thiourea. Transfer it into a beaker with a volume of 100mL, then add 30mL of deionized water, 20mL of ethylene glycol, and 25mL of DMP, and stir magnetically for 15min at a speed of 230r / 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 supernatant liquid was removed, and the centrifuge was used to wash three times with deionized water and two times with ethanol at a speed of 8000r / min, and then dried in a vacuum oven at 80°C for 10 hours.

[0040] Weigh 0.5g of Sb with a balance 2 S 3 , 0.1g of cobalt nitrate hexahydrate, 0.2g of cobalt sulfate heptahydrate, 0.48g of sodium sulfide nonahydrate, 0.5g of sodium thiosulfate, 0.2g of glucose, 0.1g of ascorbic acid. Move it into a beaker with a volume of 100mL, then add 35mL of deionized water, 20mL of...

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Abstract

The invention relates to the technical field of preparation of new-energy electrode materials, in particular to an antimony cobalt sulfide-carbon composite nanorod and a preparation method and application thereof. The preparation method comprises the following steps: (1) dissolving antimony chloride, a chelating agent and a sulfur source in a reaction solution in proportion, conducting stirring for uniform mixing, then transferring the formed mixture to a high-pressure reaction kettle lining for a reaction, and after the reaction is finished, centrifuging, washing and drying a product to obtain an antimony sulfide nanorod; and (2) adding the obtained antimony sulfide nanorod serving as a precursor, cobalt nitrate hexahydrate and cobalt sulfate heptahydrate serving as cobalt sources, a sulfur source and a carbon source into a reaction solution together, carrying out uniform stirring, then transferring the obtained mixture to the high-pressure reaction kettle lining for a reaction, and after the reaction is finished, centrifuging, washing, drying and calcining a product, and washing and drying the calcined product to obtain the target product. According to the invention, a method of combining solvothermal synthesis with high-temperature calcination is adopted to prepare a multi-stage layered structure electrode material composed of antimony cobalt sulfide nanorods; and the cycle performance and the rate capability of the electrode material are improved through carbon coating.

Description

technical field [0001] The invention relates to the technical field of preparation of new energy electrode materials, in particular to an antimony cobalt sulfide-carbon composite nanorod and its preparation method and application. Background technique [0002] In order to further increase the power density of materials while ensuring the excellent cycle life of supercapacitors, it is necessary to conduct in-depth research on the energy storage mechanism of different materials, continuously develop new material systems, seek the essential relationship between energy storage mechanism and electrochemical performance, and search for capacity. High, stable electrode material. On the other hand, it is necessary to study and analyze the microscopic morphology and structure of the material through precise characterization methods, and to explore the influence of the structure modified by different methods on the electrochemical performance of the material. Compared with graphite m...

Claims

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Application Information

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IPC IPC(8): C01G51/00C01B32/05B82Y30/00B82Y40/00H01M4/58H01M4/62H01M10/0525
CPCC01G51/006C01B32/05H01M4/5815H01M4/625H01M10/0525B82Y30/00B82Y40/00C01P2004/16C01P2004/80C01P2004/03C01P2002/72C01P2006/40Y02E60/10Y02E60/13
Inventor 李俊哲孙文超汪超连玮豪秦清清
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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