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Method for preparing tin oxide/tri-tin tetra-oxide negative electrode materials with nanosheet structures for lithium ion batteries

A technology for lithium tin tetroxide and ion batteries, applied in battery electrodes, nanotechnology, secondary batteries, etc., can solve the problems of less research on battery materials, and achieve improved electrochemical performance, strong crystallinity, and easy process. control effect

Inactive Publication Date: 2019-02-19
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, Sn 3 o 4 Exhibiting excellent electrochemical performance and cycle stability, as an anode material for lithium-ion batteries, it is an abundant, cheap, and environmentally friendly anode material with great potential and less research on battery materials

Method used

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  • Method for preparing tin oxide/tri-tin tetra-oxide negative electrode materials with nanosheet structures for lithium ion batteries
  • Method for preparing tin oxide/tri-tin tetra-oxide negative electrode materials with nanosheet structures for lithium ion batteries
  • Method for preparing tin oxide/tri-tin tetra-oxide negative electrode materials with nanosheet structures for lithium ion batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Put 0.5gSnCl 4 ·5H 2 O was dissolved in 40 mL of deionized water, so that it was fully dissolved to form solution A, and NaOH was dissolved in the above solution A to prepare solution B according to the element mass ratio mSn:mNa=(0.5:0.6);

[0032] 2) Under the action of magnetic stirring, 0.3 g of urea was added to the B solution, and it was continuously stirred to form a uniform mixed solution C,

[0033] 3) Put the C solution into a homogeneous hydrothermal reactor to seal, the filling ratio is controlled at 40%, put into a homogeneous hydrothermal reactor, the reaction temperature is controlled at 160°C, and the reaction time is controlled at 12h;

[0034] 4) After the reaction is over, take out the precursor, and wash it three times by centrifugation with deionized water and absolute ethanol, respectively, to obtain a white precursor and vacuum dry it at 80 °C for 12 h to obtain SnO 2 Precursor.

[0035] 5) SnO in a muffle furnace at 300°C 2 Heating for 1h,...

Embodiment 2

[0037] 1) Put 0.7012g SnCl 4 ·5H 2 O was dissolved in 50 mL of deionized water to fully dissolve it to form solution A. According to the element mass ratio m Sn :m Na =(0.7102:0.8002) Dissolve NaOH in above-mentioned solution A to prepare solution B;

[0038] 2) Under the action of magnetic stirring, 0.5g of urea was added to the B solution, and the mixture was continuously stirred to form a uniform mixed solution C,

[0039] 3) Put the C solution into a homogeneous hydrothermal reactor to seal, the filling ratio is controlled at 50%, put into a homogeneous hydrothermal reactor, the reaction temperature is controlled at 180°C, and the reaction time is controlled at 24h;

[0040] 4) After the reaction is over, take out the precursor, and wash it three times by centrifugation with deionized water and absolute ethanol, respectively, to obtain a white precursor and vacuum dry it at 80 °C for 12 h to obtain SnO 2 Precursor.

[0041] 5) SnO in a muffle furnace at 400°C 2 Heati...

Embodiment 3

[0044] 1) Put 1gSnCl 4 ·5H 2 O was dissolved in 60 mL of deionized water to make it fully dissolved to form solution A. According to the element mass ratio m Sn :m Na =(1:0.95) NaOH is dissolved in above-mentioned solution A to prepare solution B;

[0045] 2) Under the action of magnetic stirring, 0.7g of urea was added to the B solution, and it was continuously stirred to form a uniform mixed solution C,

[0046] 3) Put the C solution into a homogeneous hydrothermal reactor to seal, the filling ratio is controlled at 60%, put into a homogeneous hydrothermal reactor, the reaction temperature is controlled at 200°C, and the reaction time is controlled at 30h;

[0047] 4) After the reaction is over, take out the precursor, wash it by centrifugation with deionized water and anhydrous ethanol for 3 times, respectively, to obtain a white precursor, and vacuum dry it at 80 °C for 12 hours to obtain SnO 2 Precursor.

[0048] 5) SnO in a muffle furnace at 500°C 2 Heating for 5h,...

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Abstract

The invention discloses a method for preparing tin oxide / tri-tin tetra-oxide negative electrode materials with nanosheet structures for lithium ion batteries. The method includes dissolving SnCl<4> 5H<2>O in deionized water, sufficiently dissolving the SnCl<4> 5H<2>O to form solution A, and dissolving NaOH in the solution A according to an element mass ratio of mSn to mNa being (0.5-1):(0.6-0.95)to prepare solution B; adding urea into the solution B under stirring effects, and continuing to stir the urea and the solution B to obtain uniform mixed solution C; carrying out homogenous hydrothermal reaction on the mixed solution C, separately centrifugally washing products by deionized water and absolute ethyl alcohol by a plurality of times after the reaction is completely carried out, and then carrying out vacuum drying to obtain SnO<2> precursors; heating the SnO<2> precursors under the condition of the temperature of 300-500 DEG C for 1-5 h at the temperature rise rate of 1-5 DEG C / min under the control, and dropping the temperature until the temperature reaches the room temperature so as to obtain the tin oxide / tri-tin tetra-oxide negative electrode materials with the nanosheet structures for the lithium ion batteries. A mass ratio of the SnCl<4> 5H<2>O to the urea in the mixed solution C is (0.5-1):(0.3-0.7).

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 nanosheet structure tin oxide / tritin tetroxide 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 have gradually become popular, and the demand for safe, high-performance portable small power supplies has grown rapidly. . 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 charging and discharging. Therefore, it has become the current research and application. hot spot. However, there are still many problems to be solved, such as: high cost, insufficient ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M10/0525B82Y40/00
CPCB82Y40/00H01M4/362H01M4/483H01M10/0525Y02E60/10
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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