Preparation method and application of hollow tin alloy nanoparticles with a particle size of less than 50 nm

A nanoparticle, tin alloy technology, applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, can solve the problems of active material pulverization, poor cycle performance, capacity reduction, etc., and achieve uniform particle size. , the effect of easy experimental conditions and simple experimental methods

Active Publication Date: 2013-12-11
北京传奇优声文化传媒有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when metal tin is used as the negative electrode material of lithium-ion batteries, there will be a huge volume expansion (300%) during the lithium intercalation and delithiation process, which will lead to the pulverization of the active material in the electrode, resulting in a rapid decline in capacity and poor cycle performance. Difference
This is the main reason hindering the application of tin in lithium-ion batteries

Method used

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  • Preparation method and application of hollow tin alloy nanoparticles with a particle size of less than 50 nm
  • Preparation method and application of hollow tin alloy nanoparticles with a particle size of less than 50 nm
  • Preparation method and application of hollow tin alloy nanoparticles with a particle size of less than 50 nm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Measure 40ml of deionized water in a beaker, add 0.4g of concentrated sulfuric acid into it, stir to form a 0.01g / ml dilute sulfuric acid aqueous solution, then weigh stannous sulfate (SnSO 4 ) 0.4g, polyvinylpyrrolidone (PVP) 0.04g were added to dilute sulfuric acid solution, stirred and dissolved to form solution A, in which SnSO 4 and PVP concentrations were 0.01g / ml and 0.001g / ml;

[0025] 2) Measure 160ml of deionized water in a beaker, weigh 0.32g of sodium borohydride (NaBH 4 ) into it, stirred and dissolved to form a 0.002g / ml sodium borohydride aqueous solution, weighed 0.5g sodium hydroxide and dissolved in 40ml deionized water, dissolved to form a sodium hydroxide solution, and added the solution to the sodium borohydride solution, Adjust pH≧12 to obtain solution B;

[0026] 3) Add solution A to solution B drop by drop under stirring at room temperature, and react for about 3 hours until no bubbles are generated. After the reaction is finished, the solu...

Embodiment 2

[0031] 1) Measure 40ml of deionized water in a beaker, add 0.8g of concentrated sulfuric acid into it, stir to form a 0.02g / ml dilute sulfuric acid aqueous solution, then weigh stannous sulfate (SnSO 4 ) 0.8g, polyvinylpyrrolidone (PVP) 0.06g were added to dilute sulfuric acid solution, stirred and dissolved to form solution A, in which SnSO 4 and PVP concentrations were 0.02g / ml and 0.0015g / ml;

[0032] 2) Measure 160ml of deionized water in a beaker, weigh 0.64g of sodium borohydride (NaBH 4 ) into it, stirred and dissolved to form a 0.004g / ml sodium borohydride aqueous solution, weighed 0.5g sodium hydroxide and dissolved in 40ml deionized water, dissolved to form a sodium hydroxide solution, and added the solution to the sodium borohydride solution, Adjust pH≧12 to obtain solution B;

[0033] 3) Add solution A to solution B drop by drop under stirring at room temperature, and react for about 3 hours until no bubbles are generated. After the reaction is finished, the sol...

Embodiment 3

[0038] 1) Measure 40ml of deionized water in a beaker, add 1.2g of concentrated sulfuric acid into it, stir to form a 0.03g / ml dilute sulfuric acid aqueous solution, and then weigh stannous sulfate (SnSO 4 ) 1.2g, polyvinylpyrrolidone (PVP) 0.08g were added to the dilute sulfuric acid solution, stirred and dissolved to form solution A, in which SnSO 4 and PVP concentrations were 0.03g / ml and 0.002g / ml;

[0039] 2) Measure 160ml of deionized water in a beaker, weigh 0.96g of sodium borohydride (NaBH 4 ) into it, stirred and dissolved to form a 0.006g / ml sodium borohydride aqueous solution, weighed 0.5g sodium hydroxide and dissolved in 40ml deionized water, dissolved to form a sodium hydroxide solution, and added the solution to the sodium borohydride solution, Adjust pH≧12 to obtain solution B;

[0040] 3) Add solution A to solution B drop by drop under stirring at room temperature, and react for about 3 hours until no bubbles are generated. After the reaction is finished, ...

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Abstract

The present invention relates to a preparation method and an application of hollow tin alloy nanoparticles with a particle size of less than 50 nm. The preparation method comprises: preparing a stannous sulfate solution with a concentration of 0.01-0.04 g/ml, weighing polyvinylpyrrolidone, and adding to the stannous sulfate solution to form a solution A; preparing a sodium borohydride aqueous solution with a concentration of 0.002-0.008 g/ml to obtain a solution B; adding the solution A to the solution B in a dropwise manner to obtain black particles; and preparing a copper chloride dehydrated alcohol solution C with a concentration of 0.0015-0.006 g/ml, adding the prepared tin nanoparticles to the solution C, carrying out water bath heating to achieve a temperature of 60-80 DEG C, and carrying out a reaction for 2-5 h under a N2 protection condition. According to the present invention, the prepared hollow tin alloy nanoparticles have a particle size of less than 50 nm, and have a uniform particle size, the experiment method is simple, experiment conditions are easy to achieve, and the nanometer material can be used for lithium ion battery negative electrode materials.

Description

technical field [0001] The invention relates to the preparation and application of tin particles with a particle diameter less than 50 nanometers, that is, the preparation and application of hollow tin particle nanomaterials. Background technique [0002] To develop a low-carbon economy and achieve sustainable development, green and efficient energy storage technologies are particularly important. Lithium-ion battery is a very advanced electrochemical energy storage and conversion system at this stage. Compared with other batteries, lithium-ion battery has the advantages of high voltage, high energy density, long cycle life, and environmental friendliness. It is widely used in electric, Hybrid cars, notebook computers, mobile communications, aerospace and other fields. [0003] The performance of lithium-ion batteries is largely determined by the positive and negative electrode materials. Compared with the relatively mature research on positive electrode materials, the res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1395B82Y30/00B82Y40/00
CPCY02E60/10
Inventor 许鑫华毕朋石永倩范欣姜安妮
Owner 北京传奇优声文化传媒有限公司
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