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SnO2-C compound, preparation method thereof and application of SnO2-C compound as negative electrode material of lithium ion battery casing

A negative electrode material and composite technology, which is applied in the field of metallurgical powder materials and the preparation of alcohol thermal method, to achieve the effects of high yield, improved cycle stability, and high crystallinity

Inactive Publication Date: 2013-04-10
YUNNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the domestic lithium-ion battery SnO 2 There are few reports on C core-shell anode materials

Method used

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  • SnO2-C compound, preparation method thereof and application of SnO2-C compound as negative electrode material of lithium ion battery casing
  • SnO2-C compound, preparation method thereof and application of SnO2-C compound as negative electrode material of lithium ion battery casing
  • SnO2-C compound, preparation method thereof and application of SnO2-C compound as negative electrode material of lithium ion battery casing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 0.5361g SnCl 2 2H 2 O, measure 46 mL of ethanol and 24 mL of glycerin, stir and mix evenly, transfer the mixture into a polytetrafluoroethylene reactor, place in an oven at 180°C, react for 6 hours, and cool to room temperature naturally. The product was taken out, washed several times with distilled water and ethanol, dried at 60°C, and calcined at 450°C for 4 h. Such as figure 1 , the XRD phase analysis results of the obtained sample showed that the synthesized product was SnO 2 -C complex, and the morphology of the crystals is about 2 micron globules. The microstructure is analyzed by transmission electron microscope (TEM), and the micron-sized balls are nano-aggregates composed of small particles of 20 nm to 30 nm.

[0037]Add 10 wt% conductive agent acetylene black and 10 wt% binder PVDF to the synthesized material to make a slurry, evenly spread it on copper and platinum, dry it, stick it into a circular pole piece, and form a test battery with metal lit...

Embodiment 2

[0039] Weigh 0.5361g SnCl 2 2H 2 O, measure 46 mL of ethanol and 24 mL of glycerin, stir and mix evenly, transfer the mixture into a polytetrafluoroethylene reaction kettle, place in an oven at 180°C, react for 12 hours, and cool to room temperature naturally. The product was taken out, washed several times with distilled water and ethanol, dried at 60°C, and calcined at 450°C for 4 h. Such as figure 2 , the XRD phase analysis results of the obtained sample showed that the synthesized product was SnO 2 -C complex, and the morphology of the crystals is about 2 micron globules. The microstructure is analyzed by transmission electron microscope (TEM), and the micron-sized balls are nano-aggregates composed of small particles of 20 nm to 30 nm.

[0040] Add 10 wt% conductive agent acetylene black to the synthesized material, 10 wt% binder PVDF to make a slurry, evenly spread it on copper and platinum, dry it, stick it into a circular pole piece, and form a test battery with m...

Embodiment 3

[0042] Weigh 0.5361g SnCl 2 2H 2 O, measure 46 mL of ethanol and 24 mL of glycerin, stir and mix evenly, transfer the mixture into a polytetrafluoroethylene reaction kettle, place in an oven at 180°C, react for 24 hours, and cool to room temperature naturally. The product was taken out, washed several times with distilled water and ethanol, dried at 60°C, and calcined at 450°C for 4 h. Such as image 3 , the XRD phase analysis results of the obtained sample showed that the synthesized product was SnO 2 -C complex, without the existence of any impurity phase, and the morphology of the crystal is about 2 micron balls. The microstructure is analyzed by transmission electron microscope (TEM), and the micron-sized balls are nano-aggregates composed of small particles of 20 nm to 30 nm.

[0043] Add 10 wt% conductive agent acetylene black to the synthesized material, 10 wt% binder PVDF to make a slurry, evenly spread it on copper and platinum, dry it, stick it into a circular po...

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Abstract

A SnO2-C compound, a preparation method thereof and an application of the SnO2-C compound as a negative electrode material of a lithium ion battery casing belong to a metallurgic powder material and a preparation method and an application thereof. The compound provided by the invention is a 2-4-micrometer spherule, and the spherule is a nanometer aggregate consisting of 20-30-nanometer granules. The SnO2-C compound is prepared in the manner that alcoholysis is carried out on Sn salt by using glycerol and ethanol as solvents, the form of the compound changes with time at a certain temperature, and the compound is baked at a high temperature. The highest reversible capacity of the SnO2-C compound applied as the negative electrode material of the lithium ion battery casing is 630 mAh / g, the reversible capability is still greater than or equal to 590 mAh / g after recycled utilization for 100 times, and the specific capacity is kept at 84%. The SnO2-C compound and the preparation method and the application thereof have the advantages of simple technology, low cost and wide industrial production prospects.

Description

technical field [0001] The invention belongs to the preparation method and application of metallurgical powder material and alcohol thermal method. Background technique [0002] Long-life, high-capacity, recyclable, and pollution-free secondary batteries have become the research focus of the industrial green revolution, and lithium-ion batteries are one of them. Lithium-ion batteries have fewer options for positive electrode materials, so their negative electrode materials have become the main research object for improving battery energy and cycle life. The actual capacity of current commercial carbon anode materials is close to its theoretical value, making it difficult to increase the potential of the material's lithium intercalation capacity. Another problem that carbon anode materials are difficult to solve is that the lithium intercalation potential of carbon anode materials is close to that of metal lithium, such as graphite-based anode materials, in which the diffusi...

Claims

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Application Information

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IPC IPC(8): H01M4/583H01M4/48
CPCY02E60/10
Inventor 郭洪王薇毛瑞杨项军王世雄陈景
Owner YUNNAN UNIV
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