Tin-based nanoparticle-carbon composite material, and preparation method and application thereof

A technology of carbon composite materials and nanoparticles, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of uneven filling of tin dioxide, low tin content, small specific capacity, etc., and achieve good specific capacity and cycle stability Sexuality, low cost, and little pollution

Active Publication Date: 2017-03-15
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN103682348A provides a carbon nanotube-coated tin dioxide composite material and its preparation process, but in the composite material, tin dioxide is unevenly filled inside the c

Method used

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  • Tin-based nanoparticle-carbon composite material, and preparation method and application thereof
  • Tin-based nanoparticle-carbon composite material, and preparation method and application thereof
  • Tin-based nanoparticle-carbon composite material, and preparation method and application thereof

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preparation example Construction

[0038] In some embodiments, the preparation method of the metal-based nanoparticle-carbon composite material includes: uniformly mixing at least fusible metal powder, carbon material, and flux, and then heating the formed mixture in an oxygen-containing atmosphere to the The temperature is above the melting point of the fusible metal and kept warm to prepare the tin-based nano particle-carbon composite material.

[0039] In some embodiments, the preparation method of the tin-based nanoparticle-carbon composite material includes: at least taking tin powder and / or tin alloy powder, uniformly mixing with carbon material and flux, and then placing the formed mixture in an oxygen-containing atmosphere heating to a temperature above the melting point of tin or tin alloy and keeping it warm to prepare the tin-based nanoparticle-carbon composite material.

[0040] In some embodiments, the preparation method includes: heating the mixture to a temperature above the melting point of tin ...

Embodiment 1

[0057] Embodiment 1: the preparation technology of this nano tin carbon composite material comprises the steps:

[0058] ①Take a mixture of 80mg of 70μm tin powder, 100mg of multi-walled carbon nanotubes (diameter about 20-30nm, 12-20 layers) carbon nanotubes, and 100mg of commercially available rosin-type solid flux (Xinguang brand) into the researcher. Mortar, grind for half an hour, then remove the black mixture from the mortar and set aside.

[0059] ②Put the mixture powder prepared in step ① into a small tin furnace, stir and heat the mixture powder at 300°C until no smoke is generated, then cool and take out the black powder, which is the nano-tin-carbon composite material (tin-based nanoparticle-carbon composite material), for its phase characterization results, please refer to figure 1 , for structural characterization results please refer to Figure 2a-2b , 3a-3b.

[0060] The prepared nano-tin-carbon composite material and carbon black conductive agent are mixed a...

Embodiment 2

[0061] Embodiment 2: the preparation technology of this nano-tin-carbon composite material comprises the following steps:

[0062] ① Take 80mg of 70μm tin-antimony alloy powder, 100mg of multi-walled carbon nanotubes (diameter about 20-30nm, 12-20 layers) and 100mg of commercially available rosin-type solid flux (Xinguang brand) and mix them in a small tin furnace In, add 3ml ethanol, stir and set aside.

[0063] ② Stir and heat the mixture in the small tin furnace filled with materials in step ① at 232°C until no smoke is generated, then cool and take out the black powder, which is the nano-tin-carbon composite material (tin-based nanoparticle-carbon composite material).

[0064] The prepared nano-tin-carbon composite material and carbon black conductive agent are mixed and placed in the NMP solution of PVDF, and the slurry is evenly coated on the copper foil, wherein the tin-based nanoparticle-carbon composite material and conductive carbon black and PVDF The mass ratio of ...

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Abstract

The invention discloses a tin-based nanoparticle-carbon composite material. The tin-based nanoparticle-carbon composite material comprises a carbon substrate material and tin-based nanoparticles uniformly distributed on the carbon substrate material. The invention also discloses a preparation method for the composite material, wherein the preparation method comprises the steps of enabling tin powder and/or tin alloy powder to be uniformly mixed with a carbon material and a flux; and then heating the formed mixture in an oxygen-containing atmosphere to a temperature which is greater than a tin or tin alloy melting point, and performing thermal insulation to prepare the target product. The tin-based nanoparticles in the composite material are small in dimensions (about 5-20nm), uniform and controllable, and are uniformly distributed on the carbon substrate material, so that the tin content of the composite material can be adjusted at 5-80wt%; therefore, the danger caused by tin volume expansion is greatly relieved, and high specific capacity and cycling stability are achieved, so that the composite material can be used for a negative electrode material of a lithium ion battery; meanwhile, the composite material has simple preparation process, low-price and easily-available raw materials, low cost, and low pollution, is suitable for large-batch industrialization, and also can be expanded to preparation of other metal-based nanoparticle-carbon composite material.

Description

technical field [0001] The invention relates to a nanocomposite material, in particular to a tin-based nanoparticle-carbon composite material and its preparation method and application, such as the use as a negative electrode material of a lithium ion battery and in welding, coating, gas sensor and photocatalysis, etc. field applications. Background technique [0002] Today's new energy batteries have attracted great attention, but currently commercial batteries have a shortcoming of low specific capacity, so researchers continue to improve battery materials. Tin-based materials are used as the negative electrode of lithium-ion batteries. The working principle is that tin can form various alloys with lithium during the charging and discharging process of lithium-ion batteries. Compared with the existing graphite negative electrode, tin has many advantages as a lithium ion battery negative electrode, such as theoretical mass specific capacity, theoretical volume specific cap...

Claims

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Application Information

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IPC IPC(8): H01M4/38H01M4/583H01M4/1393
CPCH01M4/1393H01M4/362H01M4/387H01M4/583Y02E60/10
Inventor 张晓峰王亚龙张海洋杜兆龙卢威陈立桅
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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