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A kind of preparation method of particle assembly spherical sns2 sodium ion battery negative electrode material

A sodium-ion battery and negative electrode material technology, applied in battery electrodes, secondary batteries, chemical instruments and methods, etc., can solve the problems of small yield of nanosheets, incomplete reaction, poor controllability, etc., and achieve controllable grain growth , The effect of full and thorough reaction and fast reaction rate

Active Publication Date: 2018-03-27
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

Among them, the solid-phase reaction method has the advantages of no need for solvents, simple equipment, and easy control of reaction conditions, but because the reaction is carried out in the solid phase, the reaction is usually incomplete and the yield is low.
Mechanical exfoliation is commonly used to obtain highly crystalline ultrathin SnS 2 Nanosheets, but the yield of nanosheets obtained by this method is very small, and the controllability is very poor, so it can only be applied to basic scientific research

Method used

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  • A kind of preparation method of particle assembly spherical sns2 sodium ion battery negative electrode material
  • A kind of preparation method of particle assembly spherical sns2 sodium ion battery negative electrode material

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preparation example Construction

[0025] A kind of particle assembly spherical SnS 2 The preparation method of the negative electrode material of the sodium ion battery includes the following steps:

[0026] 1) SnCl 4 ·5H 2 O is dissolved in deionized water and prepared into solution A with a concentration of 0.6~1.3mol / L, according to the element mass ratio m Sn :m S =(1.85~2.8):(1.0~1.53) Dissolve thioacetamide in the same amount of deionized water (that is, with dissolved SnCl 4 ·5H 2 O with the same amount of deionized water) prepared into solution B;

[0027] 2) Under the action of magnetic stirring, add solution B to solution A drop by drop, continue to stir to obtain uniform mixed solution C, add 0.5mol / L NaOH solution dropwise to adjust the PH value to 4-8 to obtain solution D, then continue to stir 0.5 ~2h;

[0028] 3) Put the mixed solution D in a microwave hydrothermal reactor, control the filling ratio at 15%-30%, put it into a homogeneous hydrothermal reactor, control the reaction temperature at 150-230℃...

Embodiment 1

[0032] 1) SnCl 4 ·5H 2 O is dissolved in deionized water and prepared into solution A with a concentration of 0.6mol / L, according to the element mass ratio m Sn :m S =1.85:1.0 Dissolve thioacetamide in an equal amount of deionized water to prepare solution B;

[0033] 2) Add solution B to solution A dropwise under the action of magnetic stirring, continue stirring to obtain uniform mixed solution C, add 0.5mol / L NaOH solution dropwise to adjust the PH value to 4 to obtain solution D, and then continue stirring for 0.5h;

[0034] 3) Put the mixed solution D in a microwave hydrothermal reactor, control the filling ratio at 15%, put it into a homogeneous hydrothermal reactor, control the reaction temperature at 230°C, and control the reaction time at 8h;

[0035] 4) After the reaction is over, take out the precursor, centrifuge and wash 3 times with deionized water and absolute ethanol, and freeze-dry at -60°C for 10 hours to obtain SnS 2 product.

Embodiment 2

[0037] 1) SnCl 4 ·5H 2 O is dissolved in deionized water and formulated into solution A with a concentration of 0.8mol / L, according to the element mass ratio m Sn :m S =2.0:1.4 Dissolve thioacetamide in an equal amount of deionized water to prepare solution B;

[0038] 2) Under the action of magnetic stirring, add solution B to solution A drop by drop, continue to stir to obtain a uniform mixed solution C, add 0.5mol / L NaOH solution dropwise to adjust the pH to 6 to obtain solution D, and then continue to stir for 1.5h;

[0039] 3) Put the mixed solution D in a microwave hydrothermal reactor, control the filling ratio at 25%, put it into a homogeneous hydrothermal reactor, control the reaction temperature at 190°C, and control the reaction time at 10h;

[0040] 4) After the reaction is over, take out the precursor, centrifuge and wash 4 times with deionized water and absolute ethanol, and freeze-dry at -50°C for 11 hours to obtain SnS 2 product.

[0041] From figure 1 It can be seen t...

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Abstract

The invention discloses a method for preparing a granular assembly spherical SnS<2> sodium ion battery anode material. The method is characterized by comprising the following steps of: (1), dissolving SnCl<4>5H<2>O in deionized water to prepare solution A, and dissolving thioacetamide in the same amount of deionized water to prepare solution B; (2), dropwise adding the solution B into the solution A under the magnetic stirring action, continuously stirring to obtain uniformly mixed solution C, and continuously stirring after dropwise adding NaOH solution to form solution D; (3), putting the solution D in a microwave hydrothermal reaction instrument, and reacting in a homogeneous-phase hydrothermal reactor; and (4), after reaction is ended, taking out a precursor, respectively performing centrifugal washing through deionized water and absolute ethyl alcohol, and freezing and drying so as to obtain the granular assembly spherical SnS<2> sodium ion battery anode material. The method disclosed by the invention is low in preparation cost and short in preparation period; furthermore, the prepared granular assembly spherical SnS<2> sodium ion battery anode material has excellent electrochemical performance.

Description

Technical field [0001] The invention relates to a preparation method of a sodium ion battery negative electrode material, in particular to a particle assembly spherical SnS 2 Preparation method of negative electrode material for sodium ion battery. Background technique [0002] With the increasing pressure of resource scarcity, energy crisis and environmental pollution, finding an efficient clean energy has become the focus of all countries, and the use and development of secondary rechargeable batteries is by far the most effective and most effective solution to energy and environmental crises. Among them, the sodium ion battery is an electrochemical energy storage power source, which has the advantages of abundant raw material resources, low price, high specific energy, and good safety performance. Compared with lithium-ion batteries, sodium-ion batteries have various excellent performance and relatively stable electrochemical performance, making it expected to replace lithium-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G19/00H01M4/58H01M10/054
CPCC01G19/00C01P2004/03C01P2004/32H01M4/5815H01M10/054Y02E60/10
Inventor 殷立雄程如亮张浩白培杰刘瑶金东东
Owner SHAANXI UNIV OF SCI & TECH
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