Preparation method of tricobalt tetroxide-tin disulfide nanocomposite

A technology of tricobalt tetroxide and nanocomposites, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve the effects of cheap raw materials, simple preparation process, and reducing the influence of uncertain factors

Active Publication Date: 2019-05-24
SOUTH CHINA NORMAL UNIVERSITY
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Problems solved by technology

However, although this method prepares spherical tin sulfide, it still does not substantially improve the capacity fading problem of the tin-based material itself

Method used

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  • Preparation method of tricobalt tetroxide-tin disulfide nanocomposite
  • Preparation method of tricobalt tetroxide-tin disulfide nanocomposite
  • Preparation method of tricobalt tetroxide-tin disulfide nanocomposite

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preparation example Construction

[0036] Please refer to figure 1 and figure 2 , according to a non-limiting embodiment of the present invention, provides a kind of tricobalt tetroxide-tin disulfide (Co 3 o 4 / SnS 2 ) A method for preparing a nanocomposite, the method comprising the following steps.

[0037] Prepare hydrangea-shaped tin disulfide, this step specifically includes: adding tin sulfide pentahydrate and thioacetamide to 99% volume ethanol solution in a mass ratio of about 1:1:100, and stirring magnetically for about 4 hours to obtain a clear solution; The clarified solution is subjected to vacuum hydrothermal reaction, the hydrothermal reaction temperature is about 170 degrees Celsius, the reaction time is about 13 hours, and naturally cooled after the reaction; and, the hydrothermal reaction product is washed with 99% volume ethanol solution and deionized water successively To a pH value of about 6, vacuum-dried for about 10 hours to obtain hydrangea-shaped tin disulfide.

[0038] Disperse t...

Embodiment 1

[0045] A preparation method of tricobalt tetroxide-tin disulfide nanocomposite, such as figure 1 and figure 2 As shown, the following steps S1-S5 are included.

[0046] In step S1, hydrangea-shaped tin disulfide is prepared, specifically including steps S11-S13.

[0047] In step S11, about 1.5 g of tin sulfide pentahydrate and thioacetamide with a mass ratio of 1:1 were added into about 150 ml of 99% volume ethanol solution, and magnetically stirred for 3 h.

[0048] In step S12, move the clarified solution into a 200ml hydrothermal reaction kettle, put it into a vacuum drying oven for hydrothermal reaction, the hydrothermal reaction temperature is 160°C, and the reaction time is 12h. After the reaction, the oven is naturally cooled.

[0049] In step S13, wash with 99% volume ethanol solution and deionized water until the pH value is 7, and dry in vacuum for 12 hours for later use.

[0050] Please refer to image 3 with Figure 4 , the SEM image (scanning electron microg...

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Abstract

The invention discloses a preparation method of a cobaltosic oxide-tin disulfide nano-composite. The preparation method comprises the following steps: preparing ball-shaped tin disulfide serving as a precursor by using a hydrothermal method; mixing ball-shaped tin disulfide with cobalt acetate and potassium cobaltocyanade; performing constant-temperature magnetic stirring to generate a tin disulfide-cobalt cobaltocyanade compound; and then performing high-temperature annealing to prepare a tin disulfide composite material with cobaltosic oxide uniformly compounded inside and on the surface. The preparation method is environmentally friendly, and is free of pollution, low in cost and simple in preparation process; the prepared modified tin disulfide composite material has higher capacity and better cycling stability than a tin sulfide monomer.

Description

technical field [0001] The invention relates to a lithium ion battery negative electrode material, in particular to a tin disulfide-based negative electrode material and a preparation method thereof. Background technique [0002] At present, due to the depletion of fossil fuels, the energy crisis is becoming more and more serious, and the environmental deterioration is intensifying. Green and renewable energy have become the goals that various countries are striving to pursue. In order to take full advantage of renewable energy, cheap and stable electrical energy storage systems will be the key. Due to the advantages of high energy, long life, low consumption, pollution-free, low self-discharge, low internal resistance, high cost performance, and less pollution, lithium-ion batteries are widely used in optoelectronics, information, transportation, national defense and military fields. With the increasing demand for consumer electronics and the development of vehicles such a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/52H01M4/58H01M4/36B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/364H01M4/52H01M4/5815H01M10/0525Y02E60/10
Inventor 赵灵智朱雁飞刘钢
Owner SOUTH CHINA NORMAL UNIVERSITY
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