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A kind of preparation method of porous carbon sphere 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 sphere-loaded M-Sn alloy nanoparticle composite materials, can solve problems such as unstable cycle performance, capacity decline, and limited development and application, and achieve stable product morphology , uniform heating, broad development prospects and the effect of application space

Inactive Publication Date: 2016-10-19
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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  • A kind of preparation method of porous carbon sphere loaded m-sn alloy nano particle composite material
  • A kind of preparation method of porous carbon sphere loaded m-sn alloy nano particle composite material
  • A kind of preparation method of porous carbon sphere loaded m-sn alloy nano particle composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0044] In the second step, 1.2L / min of argon is continuously introduced into the humidifier, and the mist is introduced into the quartz tube of the tube furnace operating 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 and the precipitate was collected, and dried in a vacuum drying oven at 60° C. for 5 hours. The resultant product was a porous carbon ball.

[0047] 2) Synthesis of porous carbon ball supported SnFe alloy nanoparticle composite

[0048] The first step is to accurately weigh 0.025g porous carbon balls dispersed in 50mL triethylene glycol, and then add 0.0564g SnCl 2 ·2H 2 After O ultrasonic mixing, transfer it t...

Embodiment 2

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

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

[0055] In the second step, 1.0L / min of argon is continuously introduced into the humidifier, and the droplets are introduced into the quartz tube of the tube furnace operating 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 and the precipitate was collected, and dried in a vacuum drying oven at 60° C. for 10 hours. The resultant product was a porous carbon ball.

[0058] 2) Synthesis of porous carbon ball supported SnCo nanoparticle composite

[0059] The first step is to accurately weigh 0.030g porous carbon balls dispersed in 50mL triethylene glycol, and then add 0.0564g SnCl 2 ·2H 2 After O ultrasonically mixing, transfer ...

Embodiment 3

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

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

[0066] In the second step, 1.0L / min of argon is continuously introduced into the humidifier, and the droplets are introduced into the quartz tube of the tube furnace operating at 650℃;

[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 and the precipitate was collected, and dried in a vacuum drying oven at 60° C. for 5 hours. The resultant product was a porous carbon ball.

[0069] 2) Synthesis of porous carbon ball supported SnNi nanoparticle composite

[0070] The first step is to accurately weigh 0.025g porous carbon balls dispersed in 50mL triethylene glycol, and then add 0.0564g SnCl 2 ·2H 2 After mixing by ultrasound, transfer it to...

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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 preparation method of a porous carbon ball loaded M-Sn (M=Fe, Co, Ni) alloy nano-particle composite material. Background technique [0002] With the progress in the research and 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 with 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 pollution-free. It has become an internationally recognized ideal chemical energy source and has been widely used in mobile communications. Among products such as tools and electric vehicles, large-scale applications are expected to be realized in a broader field in the future. Among them, tin-based alloys are lithium-ion batte...

Claims

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Application Information

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