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Preparation method of porous carbon ball-loaded M-Sn alloy nano particle composite material

A technology of alloy nanoparticles and composite materials, which is applied in the field of preparation of porous carbon ball-supported M-Sn alloy nanoparticle composite materials, can solve the problems of capacity decline, limited development and application, unstable cycle performance, etc., and achieves uniform heating and wide Development prospects and application space, the effect of stable product morphology

Inactive Publication Date: 2015-01-21
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, tin-based alloys are lithium-ion battery anode materials with high theoretical specific capacity, abundant reserves, and no pollution to the environment. However, due to the easy aggregation of nanoparticles, the capacity drops sharply during the charging and discharging process of the battery, and the cycle performance is not good. Stable, thus limiting its further development and application

Method used

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  • Preparation method of porous carbon ball-loaded M-Sn alloy nano particle composite material
  • Preparation method of porous carbon ball-loaded M-Sn alloy nano particle composite material
  • Preparation method of porous carbon ball-loaded M-Sn alloy nano particle composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0042] 1) Preparation of porous carbon spheres by high temperature spray pyrolysis

[0043] In the first step, weigh 17.4g of sodium chloroacetate and dissolve it in 100mL of deionized water, add it to the humidifier to generate mist;

[0044] In the second step, 1.2L / min argon gas is continuously fed into the humidifier, and the mist is introduced into the quartz tube of the tube furnace working at 700°C;

[0045] The third step is to use absolute ethanol to collect the gas discharged from the quartz tube;

[0046] In the fourth step, the product was centrifuged at 5000 rpm to collect the precipitate, and dried in a vacuum oven at 60° C. for 5 hours, and the obtained product was porous carbon spheres.

[0047] 2) Synthesis of SnFe alloy nanoparticle composites supported by porous carbon spheres

[0048] In the first step, accurately weigh 0.025g of porous carbon spheres and disperse them in 50mL of triethylene glycol, then add 0.0564g of SnCl 2 2H 2 O After ultrasonic mix...

Embodiment 2

[0053] 1) Preparation of porous carbon spheres by high temperature spray pyrolysis

[0054]In the first step, weigh 11.6g of sodium chloroacetate and dissolve it in 100mL of deionized water, add it into a humidifier to generate mist;

[0055] The second step is to continuously feed 1.0L / min argon into the humidifier, and introduce the mist into the quartz tube of the tube furnace working at 700°C;

[0056] The third step is to use absolute ethanol to collect the gas discharged from the quartz tube;

[0057] In the fourth step, the product was centrifuged at 5000 rpm to collect the precipitate, and dried in a vacuum oven at 60°C for 10 hours, and the obtained product was porous carbon spheres.

[0058] 2) Synthesis of SnCo nanoparticle composites supported by porous carbon spheres

[0059] In the first step, accurately weigh 0.030g of porous carbon spheres and disperse them in 50mL of triethylene glycol, then add 0.0564g of SnCl 2 2H 2 O After ultrasonic mixing, transfer to...

Embodiment 3

[0064] 1) Preparation of porous carbon spheres by high temperature spray pyrolysis

[0065] In the first step, weigh 11.6g of sodium chloroacetate and dissolve it in 100mL of deionized water, add it into a humidifier to generate mist;

[0066] In the second step, 1.0L / min argon gas is continuously introduced into the humidifier, and the mist is introduced into the quartz tube of the tube furnace working at 650°C;

[0067] The third step is to use absolute ethanol to collect the gas discharged from the quartz tube;

[0068] In the fourth step, the product was centrifuged at 5000 rpm to collect the precipitate, and dried in a vacuum oven at 60° C. for 5 hours, and the obtained product was porous carbon spheres.

[0069] 2) Synthesis of porous carbon sphere-supported SnNi nanoparticle composites

[0070] In the first step, accurately weigh 0.025g of porous carbon spheres and disperse them in 50mL of triethylene glycol, then add 0.0564g of SnCl 2 2H 2 After ultrasonically mixi...

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Abstract

The invention relates to a preparation method of a porous carbon ball-loaded M-Sn alloy nano particle composite material. The preparation method comprises the following steps: weighing porous carbon balls, and adding the porous carbon balls into a solvent for ultrasonic dispersion, adding tin salt for ultrasonic uniform mixing, stirring and heating for reaction; after reacting to reach a certain temperature, adding another salt (iron salt or cobalt salt or nickel salt) dissolved in advance and a reducing agent, and carrying out high-temperature returning reaction; and after the reaction is finished, carrying out centrifugal washing to collect a product so as to obtain the porous carbon ball-loaded M-Sn (M=Fe, Co and Ni) alloy nano particle composite material. The preparation method has the advantages of being simple, and universal in preparation conditions, the product is stable in shape and high in purity, the product treatment is convenient and easy, and the preparation method is suitable for industrial production with the medium scale.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for preparing a porous carbon sphere-loaded M-Sn (M=Fe, Co, Ni) alloy nanoparticle composite material. Background technique [0002] With the development and utilization of new energy and new materials, researchers have gradually shifted their attention to the research of electrode materials for lithium-ion batteries, which have a wide range of applications. As an effective sustainable energy storage system, lithium-ion battery has the advantages of small size, light weight, large capacity, high voltage, safety, and no pollution. It has become an internationally recognized ideal chemical energy source and has been widely used in mobile communications. In products such as tools and electric vehicles, it is expected to achieve large-scale application in a wider field in the future. Among them, tin-based alloys are lithium-ion battery anode materials with hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583
CPCH01M4/583Y02E60/10
Inventor 温鸣陈世培邢柯
Owner TONGJI UNIV
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