A kind of preparation method of hollow sphere structure tin sulfide/tin oxide lithium ion battery negative electrode material

A technology for lithium-ion batteries and negative electrode materials, which is applied in battery electrodes, structural parts, secondary batteries, etc., can solve the demand for the amount of nanofibers that cannot be met, the energy and cost requirements for production are high, and nanofiber materials are widely used Obstacles and other problems can be achieved to improve electrochemical performance, increase reactive active sites, and controllable grain growth

Active Publication Date: 2021-03-16
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal decomposition method is easy to operate and has a fast reaction rate, but it is easy to cause product agglomeration, the temperature required for the reaction is high, and the energy and cost required for production are relatively high.
Electrospinning yield is unstable and inefficient, only 0.1g / h~1g / h per hour, which poses a huge obstacle to its industrialization, scale, and wide application of nanofiber materials, and cannot satisfy the traditional market The demand for the amount of nanofiber

Method used

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  • A kind of preparation method of hollow sphere structure tin sulfide/tin oxide lithium ion battery negative electrode material
  • A kind of preparation method of hollow sphere structure tin sulfide/tin oxide lithium ion battery negative electrode material
  • A kind of preparation method of hollow sphere structure tin sulfide/tin oxide lithium ion battery negative electrode material

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Experimental program
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Effect test

Embodiment 1

[0038] 1) 0.5g SnCl 4 ·5H 2 O was dissolved in 60 mL deionized water and absolute ethanol (V 去离子水 :V 无水乙醇 =1:5), make it fully dissolved to form solution A, according to the element mass ratio m Sn :m Na =(0.5:0.6) NaOH is dissolved in the above solution A to prepare solution B;

[0039] 2) Add 0.3g of urea to solution B under the action of magnetic stirring, continue to stir to form a uniform mixed solution C, and put solution C into a homogeneous hydrothermal reaction kettle to seal, the filling ratio is controlled at 40%, and put it into a homogeneous solution Hydrothermal reaction instrument, the reaction temperature is controlled at 160°C, and the reaction time is controlled at 12h;

[0040] 3) After the reaction is over, take out the precursor, wash with deionized water and absolute ethanol three times, respectively, and obtain a white precursor, then vacuum dry it at 80°C for 12 hours to obtain SnO 2 Precursor;

[0041] 4) Heating in a muffle furnace at 300°C for...

Embodiment 2

[0046] 1) 0.7102g SnCl 4 ·5H 2 O was dissolved in 60 mL deionized water and absolute ethanol (V 去离子水 :V 无水乙醇 =1:1), make it fully dissolved to form solution A, according to the element mass ratio m Sn :m Na =(0.7102:0.8002) NaOH is dissolved in the above-mentioned solution A and is mixed with solution B;

[0047] 2) Add 0.5g of urea into solution B under the action of magnetic stirring, continue to stir to form a uniform mixed solution C, put solution C into a homogeneous hydrothermal reaction kettle and seal it, the filling ratio is controlled at 50%, and put it into a homogeneous solution Hydrothermal reaction instrument, the reaction temperature is controlled at 180°C, and the reaction time is controlled at 24h;

[0048] 3) After the reaction is over, take out the precursor, wash with deionized water and absolute ethanol three times, respectively, and obtain a white precursor, then vacuum dry it at 80°C for 12 hours to obtain SnO 2 Precursor;

[0049] 4) Heating in a...

Embodiment 3

[0055] 1) 1g SnCl 4 ·5H 2 O was dissolved in 60 mL deionized water and absolute ethanol (V 去离子水 :V 无水乙醇 =5:1), make it fully dissolved to form solution A, according to the element mass ratio m Sn :m Na =(1:0.95) NaOH was dissolved in the above solution A to prepare solution B;

[0056] 2) Add 0.7g of urea to solution B under the action of magnetic stirring, and continue to stir to form a uniform mixed solution C.) Put solution C into a homogeneous hydrothermal reactor and seal it. The filling ratio is controlled at 60%, and put it into a homogeneous solution. Hydrothermal reaction instrument, the reaction temperature is controlled at 200°C, and the reaction time is controlled at 30h;

[0057] 3) After the reaction is over, take out the precursor, wash with deionized water and absolute ethanol three times, respectively, and obtain a white precursor, then vacuum dry it at 80°C for 12 hours to obtain SnO 2 Precursor.

[0058] 4) Heating in a muffle furnace at 500°C for 5 h...

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Abstract

The invention discloses a preparation method of a SnS2 / SnO2 lithium ion battery anode material in hollow-sphere structure. The method includes: 1) adding SnCl4.5H2O in a mixed liquid of deionized water and anhydrous ethanol to fully dissolve the component for forming a solution A, and dissolving NaOH in the solution A to prepare a solution B; 2) under stirring, adding urea to the solution B and continuously stirring the solution to prepare a uniform mixed solution C, and performing a homogeneous hydrothermal reaction on the mixed solution C; 3) after the reaction is finished, washing and drying a product to obtain a SnO2 precursor; 4) heating the SnO2 precursor to burning to prepare SnO2 powder; 5) dispersing the SnO2 powder in ethanol with stirring to prepare a uniform mixed suspension D;6) adding SnCl4.5H2O and TAA to the suspension D with stirring until the components are completely dissolved to obtain a homogenous suspension E; 7) performing a microwave thermal reaction on the suspension E, when the reaction is finished, moving-out and washing and drying the product to prepare the SnS2 / SnO2 lithium ion battery anode material in hollow-sphere structure.

Description

technical field [0001] The invention relates to a preparation method of a lithium ion battery negative electrode material, in particular to a preparation method of a hollow spherical structure tin sulfide / tin oxide lithium ion battery negative electrode material. Background technique [0002] As human beings enter the information society, various high-tech portable electronic products such as mobile phones, digital cameras, and notebook computers are gradually popularized, followed by a sharp increase in people's demand for safe, high-performance portable small power supplies . Lithium-ion battery is a new type of chemical power source, which meets the application requirements of electronic products such as small size, light weight, high energy density, long cycle life, good safety performance and fast charge and discharge, so it has become the current research and application. hotspot. But there are still many problems to be solved, such as: high cost, capacity requiremen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/362H01M4/5815H01M4/62H01M4/628H01M10/0525Y02E60/10
Inventor 殷立雄蔺英程如亮张浩繁黄剑锋白培杰李慧敏宋佳琪
Owner SHAANXI UNIV OF SCI & TECH
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