Nanometer tin/carbon composite material and preparation method thereof

A carbon composite material, nano-tin technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as the inability to guarantee the distribution of tin, the inability to guarantee the uniform distribution of tin, and the inability to guarantee effective suppression. , to achieve the effects of low cost, simple operation, and inhibition of hydrogen evolution reaction

Inactive Publication Date: 2018-06-08
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the direct mixing of tin powder undoubtedly cannot ensure the uniform distribution of tin in the zinc anode, and since the zinc in the anode undergoes the transformation of zinc-zincate ion-zinc oxide or zinc hydroxide during charge and discharge, it is impossible for zinc-tin alloys to Therefore, these methods cannot guarantee the distribution of tin in the electrode, let alone its effective inhibition of the hydrogen evolution reaction on the surface of carbon particles.

Method used

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  • Nanometer tin/carbon composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] step one

[0046] Add 100 ml of deionized water into a 250 ml beaker, then dissolve 1.2 g of sodium hydroxide, add 4.8 g of EDTA-Na and stir to dissolve, then add 2.32 g of tin nitrate, and ultrasonically obtain a clear solution for 30 minutes.

[0047] step two

[0048] Then add 3g of conductive carbon black, then stir for 2 hours to disperse the carbon powder evenly, and finally remove the aqueous solution by suction filtration.

[0049] step three

[0050] The obtained solid was vacuum-dried at 60° C. for 12 hours, and then calcined in an argon atmosphere at 280° C. for 30 minutes.

[0051] step four

[0052] The resulting sample was redispersed in water at 30°C, and 50ml of 3g L -1 aqueous sodium borohydride solution. After the dropwise addition, react for 3 minutes, and quickly filter the reaction solution with deionized water and ethanol, and then repeatedly wash with deionized water and ethanol to obtain product A-nano-tin / carbon composite material (3.6 g). ...

Embodiment 2

[0057] Add 40 ml of propylene glycol to a 100 ml beaker, add 0.8 g of tin chloride, and obtain a clear solution by ultrasonication for 30 minutes, then add 1 g of carbon fiber, and then stir for 1.5 hours to disperse the carbon powder evenly. After drying under vacuum for 10 hours, it was calcined at 350° C. for 40 minutes in a nitrogen atmosphere. The obtained sample was redispersed in water at 30°C, and 40ml of 1.5g L -1 Sodium borohydride solution in isopropanol. After the dropwise addition, react for 2 minutes, and quickly filter the reaction solution with deionized water and ethanol to wash repeatedly to obtain the final product. In the final product, the particle size of the tin is 5-15nm.

[0058] Get this product 0.1g, common conductive carbon and tin are mixed and weighed 0.1g according to the ratio of this product, and the tin-carbon composite material (comparative example 1) 0.1g of equal proportion prepared by conventional direct liquid phase method; Add 0.8g res...

Embodiment 3

[0060] Add 120ml of deionized water to a 250ml beaker, add 3.8g of sodium alginate, stir to dissolve, add 2.1g of tin nitrate, and ultrasonically obtain a clear solution for 40 minutes, then add 2.4g of carbon nanotubes, and then stir for 2.5 hours to become carbon powder Disperse evenly, and finally remove the aqueous solution by suction filtration, vacuum-dry the obtained solid at 60°C for 14 hours, and then calcinate at 330°C for 30 minutes in an argon atmosphere. The obtained sample was redispersed in water at 30°C, and 30ml of 2g L -1 aqueous sodium borohydride solution. After the dropwise addition, react for 2 minutes, and quickly filter the reaction solution with deionized water and ethanol to wash repeatedly to obtain the final product. In the final product, the particle size of the tin is 8-20nm.

[0061] Get this product 0.1g, common conductive carbon and tin are mixed and weighed 0.1g according to the ratio of this product, and the tin-carbon composite material (c...

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Abstract

The invention relates to a nanometer composite material, in particular to a nanometer tin / carbon composite material and a preparation method thereof. A nanometer tin and carbon compound is obtained bytaking various carbon materials as a substrate, tin nitrate, tin chloride, tin sulfate, tin acetate, tin citrate and the like as a tin source, water containing an organic complexing agent, ethylene glycol, propylene glycol or other mixture as a solvent and sodium borohydride, potassium borohydride, hydrazine hydrate and the like as a reducing agent and by an absorption-decomposition-reduction method. According to the method, a solution containing tin ions is absorbed to a surface of a carbon material, remaining solution is filtered, the tin oxide / tin and carbon compound is obtained after thermal treatment, and the nanometer tin / carbon composite material is finally obtained by reduction reaction. In the composite material obtained by the method, metal tin particles are uniformly distributed in surfaces of carbon particles in nanometer size, and a phenomenon that a large amount of tin can be agglomerated by a traditional tin reduction method is prevented.

Description

technical field [0001] The invention discloses a nano-tin / carbon composite material and a preparation method thereof, which belongs to the field of material preparation, and particularly designs the nano-composite material and its preparation. Background technique [0002] Alkaline water-based zinc-based batteries, such as zinc-manganese, zinc-nickel, and zinc-air batteries, are safer than lithium-ion batteries because they use non-flammable aqueous electrolytes. In recent years, recyclable secondary aqueous batteries, represented by zinc-nickel and zinc-air batteries, have attracted widespread attention. [0003] The negative electrode of aqueous zinc-based batteries often has a great influence on the capacity, working voltage, power efficiency, charge and discharge power, recyclability, and storage performance of the battery. People usually prepare zinc anodes into zinc powder, zinc particles, zinc balls, zinc flakes, zinc wires and other structures to increase the specif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M10/24B82Y30/00
CPCB82Y30/00H01M4/625H01M4/628H01M10/24Y02E60/10
Inventor 田忠良杨超辛鑫黄林峰石俊诚秦朗张廷宇赖延清李劼
Owner CENT SOUTH UNIV
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