Method for preparing hollow antimony-based binary alloy composite nanofiber material based on electrostatic spinning and potassium storage application of hollow antimony-based binary alloy composite nanofiber material

A composite nanofiber and electrospinning technology, which is applied in the manufacture of conductive/antistatic filaments, electrical components, rayon, etc., can solve the problems of Sb-based material crushing, achieve good cycle life, shorten the process flow, and improve Effect of Market Application Prospects

Active Publication Date: 2020-11-17
OCEAN UNIV OF CHINA
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, there is about 400% volume expansion during the intercalation and deinterca

Method used

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  • Method for preparing hollow antimony-based binary alloy composite nanofiber material based on electrostatic spinning and potassium storage application of hollow antimony-based binary alloy composite nanofiber material
  • Method for preparing hollow antimony-based binary alloy composite nanofiber material based on electrostatic spinning and potassium storage application of hollow antimony-based binary alloy composite nanofiber material
  • Method for preparing hollow antimony-based binary alloy composite nanofiber material based on electrostatic spinning and potassium storage application of hollow antimony-based binary alloy composite nanofiber material

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Experimental program
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Example Embodiment

[0017] Example 1

[0018] 20 mg of hydroxylated multi-walled carbon nanotubes were dissolved in 10 ml of DMF to form a black solution after 3 hours, and then add 2 mmol of SBCl in solution. 3 Ni (CH) 3 COO) 2 · 4h 2 After stirring at room temperature for 4 hours, 0.7 g of polypropylene nitrile and mixture of 0.3 g of polymethyl methacrylate, and heated overnight stirring at 60 ° C. The spinning fluid was transferred to a 10 ml disposable syringe and then used in electrostatic spinning. Promoting speed is 50 ul min -1 The working voltage is set to 15kV, collected in the aluminum foil, the needle model is 21g, the needle to the collector is 18cm. After 8 hours of spinning, the fibers were vacuum overnight overnight, and the solvent was allowed to volatilize. After drying, the nanofiber film is in Ar / h 2 Atmosphere first with 2 o C MIN -1 Speed ​​temperature rising to 280 oC Insulation 3H for pre-carnet, keep the original topography of fibers, then 5 o C MIN -1 Rate continues to wa...

Example Embodiment

[0019] Example 2

[0020] The method of this embodiment is substantially the same as in Example 1, and the difference is: will Ni (CH) 3 COO) 2 · 4h 2 O change to SNCL 2 , SNCL 2 SBCL 3 The molar ratio is also 1: 1. The resulting sample was SNSB / CNT / PC composite nanofiber material. Depend on figure 2 Sem images, the diameter of nanofibers is 200-300 nm, and the surface is very smooth. The SNSB alloy particles are about 50 nm, and there is a reunite phenomenon. The SNSB alloy particles are in the hollow passage of the fibers. The presence of CNT is not observed by the SEM image, because CNT is well limited to the interior of carbon nanofibers.

Example Embodiment

[0021] Example 3

[0022] The method of this embodiment is substantially the same as in Example 1, and the difference is: will Ni (CH) 3 COO) 2 · 4h 2 O change to COCL 2 , CoCl 2 SBCL 3 The molar ratio is also 1: 1. The resulting sample was a COSB / CNT / PC composite nanofiber material. Depend on image 3 The SEM picture shows that the nanofiber is several hundred nanometers, and the COSB nanoparticle diameter is several nanometers, which can clearly see that the COSB nanoparticles are uniformly distributed in the inside and outside of the carbon fiber, and can see the interior of the fibers as a hollow structure, because PMMA is generated during the calcination process. The CNT is exposed to the hollow passage to form a good conductive network.

[0023] The xSB (x = Ni, Sn, CO) / CNT / PC complex nanofiber material of the present invention is characterized by XRD technology. Figure 4 Indicated by Figure 4 It can be seen that the NISB / CNT / PC, SNSB / CNT / PC, SNSB / CNT / PC, ...

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Abstract

The invention discloses a method for preparing a hollow antimony-based binary alloy composite nanofiber material based on electrostatic spinning and potassium storage application of the hollow antimony-based binary alloy composite nanofiber material. According to the method, PAN and PMMA are taken as precursors, after antimony trichloride, CNT, nickel acetate, stannous chloride and cobalt chlorideare dissolved into DMF according to a certain proportion to form a spinning solution, the spinning solution is transferred into a disposable injector, electrostatic spinning is carried out in electrostatic spinning equipment, and a nanofiber membrane is obtained. After vacuum drying, the fiber membrane is put into a tubular furnace, the temperature is increased to 230-300 DEG C at a low temperature increase rate, heat preservation is carried out for a certain time, pre-carbonization is carried out, then the temperature is increased to 600-800 DEG C at a large temperature increase rate, carbonization is carried out, and a sample obtained after carbonization is marked as XSb (X = Ni, Sn, Co)/CNT/PC. A carbon framework provides a three-dimensional conductive network, the PMMA is pyrolyzed togenerate a hollow channel, alloy particles are embedded in the inner and outer surfaces of carbon fibers, by means of the CNT, the overall conductivity of the material is improved in the carbon fibers, and therefore the material shows excellent comprehensive electrochemical performance when used as a potassium ion battery electrode material.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage materials, and provides a method for preparing a hollow antimony-based binary alloy composite nanofiber material based on electrospinning, and an application in negative electrode materials of potassium ion batteries. Background technique [0002] Energy is an important material basis for the progress of human civilization. With the depletion of non-renewable energy such as oil, people have been exploring alternative renewable energy. In recent years, lithium-ion batteries have developed rapidly, and research on electrode materials for lithium-ion batteries has achieved fruitful results. Lithium-ion batteries have been developed commercially, but the storage of lithium resources in the earth's crust is very limited, and the distribution is uneven globally. Therefore, the application of lithium-ion energy storage devices in large-scale energy storage is limited. The chemical properti...

Claims

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Application Information

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IPC IPC(8): D01F9/22D01F9/21D01F1/08D01F1/09D01F1/10H01M4/36H01M4/38H01M4/62H01M10/054
CPCD01F9/22D01F9/21D01F1/08D01F1/09D01F1/10H01M4/362H01M4/38H01M4/625H01M4/628H01M10/054H01M2004/021H01M2004/027Y02E60/10
Inventor 柳伟周峻安高翔
Owner OCEAN UNIV OF CHINA
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