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Carbon nano rod composite material and preparation method and application thereof

A technology of carbon nanorods and composite materials, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of low active material content, poor electrochemical performance, large fiber diameter, etc., to achieve Effects of high active material content, improved electrochemical performance, and small nanorod diameter

Active Publication Date: 2018-01-05
BEIJING UNIV OF CHEM TECH
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AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the technical problems of low active substance content, easy agglomeration, large fiber diameter and poor electrochemical performance of materials prepared by the existing electrospinning process, and provide a porous carbon with high active substance content and good electrochemical performance. Preparation method of nanorod electrode material

Method used

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  • Carbon nano rod composite material and preparation method and application thereof
  • Carbon nano rod composite material and preparation method and application thereof
  • Carbon nano rod composite material and preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0031] Preparation of electrospinning solution: Weigh 1g of polyvinylpyrrolidone and dissolve it in 10mL of absolute ethanol, stir at room temperature to obtain a uniform and transparent solution; add 2.5g of tetraethyl orthosilicate to the above transparent solution and stir evenly, then add 0.15g of Ultra-long manganese dioxide nanowires were stirred to obtain a uniformly dispersed slurry; wherein, the one-dimensional ultra-long manganese dioxide nanowires used were purchased from Beijing Tongguang Fine Chemical Co., Ltd. 0.316g potassium permanganate, Dissolve 0.74g of ammonium fluoride in 60ml of deionized water, then transfer the resulting solution to a 100ml polytetrafluoroethylene reactor, put the reactor in an oven at 200°C for hydrothermal reaction for 24 hours, and cool down to room temperature naturally. The obtained tan powder was washed with deionized water to neutrality and then dried at 80°C to obtain one-dimensional ultra-long manganese dioxide nanowires. (2) E...

Embodiment 2

[0033] Configuration of electrospinning solution: Weigh 1.5g of polyvinylpyrrolidone and dissolve it in 10.5mL of absolute ethanol (polyacetate pyrrolidone: absolute alcohol = 1:7), stir at room temperature to obtain a uniform and transparent solution; 5.25g of ethyl orthosilicate Ester (polypyrrolidone acetate: ethyl orthosilicate = 1:3.5) was added to the above transparent solution and stirred evenly, then 0.1g of one-dimensional ultra-long manganese dioxide nanowires were added, and stirred to obtain a uniformly dispersed slurry; (2) using Preparation of nanofiber membranes by electrospinning process: the parameters of the electrospinning process: the inner diameter of the syringe needle is 0.7mm, the temperature is 25°C, the relative humidity is 25%, the electrostatic voltage is 14kV, and the flow rate of the spinning solution is 1ml / h. The receiving distance is 25cm, the rotating speed of the drum is 400rpm, and double-needle spinning is used to obtain PVP / MnO 2 / TEOS fib...

Embodiment 3

[0035] Configuration of electrospinning solution: Weigh 1g of polyvinylpyrrolidone and dissolve it in 15mL of absolute ethanol, stir at room temperature to obtain a uniform and transparent solution; ) into the above-mentioned transparent solution and stir evenly, then add 0.05g of one-dimensional manganese dioxide nanotubes (active substance: polyvinylpyrrolidone=1:20), and stir to obtain a uniformly dispersed slurry; wherein, the used one-dimensional manganese dioxide Manganese nanotubes are obtained by dissolving 0.4g potassium permanganate and 0.1g concentrated hydrochloric acid purchased from Beijing Tongguang Fine Chemical Co., Ltd. in 50ml deionized water, and then transferring the resulting solution to a 100ml polytetrafluoroethylene reactor , put the reaction kettle in an oven at 140°C for hydrothermal reaction for 6 hours, cool down to room temperature naturally, wash the obtained tan powder with deionized water until it is neutral, and then dry it at 80°C to obtain on...

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Abstract

The invention relates to a carbon nano rod composite material and a preparation method and an application thereof. The technical problems are solved that the active substance of an existing electrostatic spinning technology is low in content, aggregates easily, and is large in fiber diameter and poor in electrochemical performance, an external layer is a carbon wrapping layer, an internal layer isthe active substance, the active substance is a one-dimensional metal oxide and is provided with mesopores, the content of the active substance is 50-80wt%, and the diameter of a nano rod is 30-100 nanometers. The invention provides the preparation method and the application of the carbon nano rod composite material ate the same time. The carbon nano rod composite material is easy in technology,the active substance of the obtained material is high in content and is evenly dispersed, the material is provided with rich pore structures, the diameter of the nano rod is low, and the material hasexcellent electrochemical performance as an electrode material.

Description

technical field [0001] The invention relates to the field of battery materials, in particular to a carbon nanorod composite material and its preparation method and application. Background technique [0002] In recent years, the combustion of fossil fuels has caused problems such as smog and the greenhouse effect. With the consumption of non-renewable energy, the problem of energy shortage has become more and more prominent. Therefore, people's demand for high-efficiency energy storage systems is becoming more and more urgent. As the most promising secondary battery in the 21st century, lithium-ion battery has attracted the attention of scientists. With the continuous expansion of the application field of lithium-ion batteries, the various performance requirements for it are also continuously improved. Anode materials, as one of the key materials that directly affect the performance of lithium-ion batteries, have always been the research focus of scientists. [0003] Trans...

Claims

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Application Information

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IPC IPC(8): D01F9/21H01M4/62B82Y30/00B82Y40/00
CPCY02E60/10
Inventor 于运花郑丽明兰金叻杨小平
Owner BEIJING UNIV OF CHEM TECH
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