Preparation method and application of stainless steel net-loaded SnO2/SnS2 nanosheet potassium ion battery negative electrode composite material

A technology of stainless steel mesh and battery negative electrode, which is applied in the manufacture of battery electrodes, electrode carriers/current collectors, and electrolyte storage batteries. It can solve the problems of battery capacity attenuation, volume expansion and shrinkage, and achieve uniform size, simple operation, and good cycle stability. performance effect

Inactive Publication Date: 2018-11-23
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the single-structure SnO 2 material with K + The embedding and detachment of the battery will cause serious volume expansion and contraction, and the volume expansion will reach 3 times of the original volume, thereby reducing the serious capacity attenuation of the battery.

Method used

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  • Preparation method and application of stainless steel net-loaded SnO2/SnS2 nanosheet potassium ion battery negative electrode composite material
  • Preparation method and application of stainless steel net-loaded SnO2/SnS2 nanosheet potassium ion battery negative electrode composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Dissolve 1.2g of sodium hydroxide and 1.8g of tin chloride in 40ml of deionized water and fully stir to obtain solution A;

[0025] 2), transfer solution A to a stainless steel reaction kettle, and place the pre-cleaned stainless steel mesh in the solution at the same time. After reacting at 200°C for 24 hours, wash it with ethanol and deionized water for 3 times. Bake in an oven for 8 hours to obtain the precursor of carbon-coated tin oxide nanosheet structure supported by stainless steel mesh;

[0026] 3), dissolving 0.21g of thioacetamide in 30ml of deionized water, and soaking the stainless steel mesh-loaded tin oxide nanostructure obtained in 2) for 24 hours to obtain a stainless steel mesh-loaded SnO 2 / SnS 2 nanosheet structure;

[0027] 4), the assembly of the button cell will be loaded with a kind of SnO loaded on the stainless steel mesh 2 / SnS 2 The stainless steel net with nanosheet structure is punched into a disc with a diameter of 8 mm as the activ...

Embodiment 2

[0030] 1) Dissolve 1.2g of sodium hydroxide and 3.4g of tin chloride in 40ml of deionized water and fully stir to obtain solution A;

[0031] 2), transfer solution A to a stainless steel reaction kettle, and place the pre-cleaned stainless steel mesh in the solution at the same time. After reacting at 200°C for 24 hours, wash it with ethanol and deionized water for 3 times. Bake in an oven for 8 hours to obtain the precursor of carbon-coated tin oxide nanosheet structure supported by stainless steel mesh;

[0032] 3), dissolving 0.21g of thioacetamide in 30ml of deionized water, and soaking the stainless steel mesh-loaded tin oxide nanostructure obtained in 2) for 24 hours to obtain a stainless steel mesh-loaded SnO 2 / SnS 2 nanosheet structure;

[0033] 4), the assembly of the button cell will be loaded with a kind of SnO loaded on the stainless steel mesh 2 / SnS 2 The stainless steel net with nanosheet structure is punched into a disc with a diameter of 8 mm as the activ...

Embodiment 3

[0036] 1) Dissolve 1.2g of sodium hydroxide and 5.1g of tin chloride in 40ml of deionized water and fully stir to obtain solution A;

[0037] 2), transfer solution A to a stainless steel reaction kettle, and place the pre-cleaned stainless steel mesh in the solution at the same time. After reacting at 200°C for 24 hours, wash it with ethanol and deionized water for 3 times. Bake in an oven for 8 hours to obtain the precursor of carbon-coated tin oxide nanosheet structure supported by stainless steel mesh;

[0038]3), dissolving 0.21g of thioacetamide in 30ml of deionized water, and soaking the stainless steel mesh-loaded tin oxide nanostructure obtained in 2) for 24 hours to obtain a stainless steel mesh-loaded SnO 2 / SnS 2 nanosheet structure;

[0039] 4), the assembly of the button cell will be loaded with a kind of SnO loaded on the stainless steel mesh 2 / SnS 2 The stainless steel net with nanosheet structure is punched into a disc with a diameter of 8 mm as the active...

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Abstract

The invention relates to preparation method and application of a stainless steel net-loaded SnO2/SnS2 nanosheet potassium ion battery negative electrode composite material. The preparation method comprises the steps of dissolving sodium hydroxide in certain mass into deionized water to obtain a solution A; adding tin chloride into the solution A to obtain a solution or emulsion B under stirring ofa magnetic force; transferring the solution B to a hydrothermal reaction kettle, placing a stainless steel net which is cleaned in advance in the solution B, performing hydrothermal reaction, performing cooling after reaction is ended, and cleaning the stainless steel net with the deionized water and ethyl alcohol to obtain a stainless steel net-loaded tin oxide nanometer-structure precursor; andplacing the stainless steel net-loaded tin oxide nanometer-structure precursor in a solution containing a sulfur source, performing reaction for certain time under a certain temperature, cleaning with the deionized water and the ethyl alcohol, and drying under the certain temperature to obtain the stainless steel net-loaded SnO2/SnS2 nanosheet-shaped structure. By the preparation, the conductivity of a potassium ion battery is improved, meanwhile, the error of paste mixing and coating processes is omitted, and the situation that the test performance of the battery is affected by application of a binding agent is prevented.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a stainless steel net loaded with SnO 2 / SnS 2 Preparation method and application of nanosheet potassium ion battery negative electrode composite material. Background technique [0002] Battery technology is the threshold for the vigorous promotion and development of electric vehicles, and the current battery industry is at a time when the development of lead-acid batteries and traditional lithium batteries are both encountering bottlenecks, and the storage capacity of lithium is small and the price is high. Therefore, the metal potassium of the same group has attracted the attention of scientific researchers. [0003] SnO 2 It is an important battery anode material, it has 783Amh g -1 Compared with other oxide semiconductor materials, it has high conductivity and high electron mobility (about 100-200cm 2 ·V -1 ·S -1 ), which has great potential application value...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/58H01M4/66H01M4/80H01M10/054H01M10/058B82Y40/00
CPCB82Y40/00H01M4/362H01M4/483H01M4/5815H01M4/669H01M4/80H01M10/054H01M10/058Y02E60/10Y02P70/50
Inventor 杨艳玲李丹锁国权王祎左玉侯小江冯雷王成威
Owner SHAANXI UNIV OF SCI & TECH
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