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Fe2O3/SnO2 composite material and preparation method and application thereof and lithium-ion battery

A lithium-ion battery and composite material technology, which is applied in the preparation of lithium-ion battery electrode materials, its preparation, and Fe2O3/SnO2 composite materials, can solve the problem that the morphology of two-component oxides is difficult to control, and the microscopic morphology of alloy oxides is amorphous. , The purity of metal oxides is not high, etc., to achieve the effect of small grain size, good fibrous morphology, and large porosity

Inactive Publication Date: 2018-11-06
HUBEI ENG UNIV
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Problems solved by technology

The synthesis conditions of the hydrothermal method are relatively harsh, it is difficult to control the morphology of the two-component oxide, and the cost is high; the co-precipitation method and the liquid phase precipitation method are complicated to operate, take a long time, and the purity of the prepared metal oxide is not high ; The microscopic morphology of the prepared alloy oxide is amorphous

Method used

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  • Fe2O3/SnO2 composite material and preparation method and application thereof and lithium-ion battery
  • Fe2O3/SnO2 composite material and preparation method and application thereof and lithium-ion battery
  • Fe2O3/SnO2 composite material and preparation method and application thereof and lithium-ion battery

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preparation example Construction

[0052] According to a second aspect of the present invention, there is provided a Fe 2 o 3 / SnO 2 The preparation method of composite material, comprises the following steps:

[0053] Add tin salt and iron salt to the electrospinning solution, mix them evenly, and then perform electrospinning to obtain the primary product. The primary product is dried and heat-treated in an air atmosphere to obtain Fe 2 o 3 / SnO 2 composite materials;

[0054] Preferably, the tin salt is one of stannous chloride, stannous oxalate, tin tetrachloride or stannous sulfate, preferably stannous chloride;

[0055] Preferably, the iron salt is one of ferric acetylacetonate, ferric chloride, ferrous oxalate or ferrous sulfate, preferably ferric acetylacetonate;

[0056] Preferably, the electrospinning solution includes a polymer and a solvent;

[0057] Preferably, the polymer is one of polyacrylonitrile, polystyrene, polyvinyl alcohol or polyvinylpyrrolidone, preferably polyacrylonitrile;

[00...

Embodiment 1

[0108] a kind of Fe 2 o 3 / SnO 2 The preparation method of composite material, comprises the following steps:

[0109] (1) 1.80 parts by weight of polyacrylonitrile and 12.00 parts by weight of N,N-dimethylformamide are mixed uniformly to form a mixed solution;

[0110] (2) Add 0.70 parts by weight of stannous chloride and 0.44 parts by weight of iron acetylacetonate into the mixed solution, and mix at 45°C for 11 hours;

[0111](3) The mixed solution obtained in step (2) is subjected to electrospinning to obtain the primary product. The process parameters of the electrospinning include: the inner diameter of the syringe needle is 0.4mm, the voltage of the electrospinning is 15kV, and the scanning stroke is 35mm. The flow rate is 0.8mL / h, the distance between the collecting plate and the needle is 12cm, and the aluminum foil collects the spinning sample to obtain the primary product;

[0112] (4) drying the primary product, drying in a vacuum oven, the drying temperature i...

Embodiment 2

[0116] a kind of Fe 2 o 3 / SnO 2 The preparation method of composite material, comprises the following steps:

[0117] (1) 2.20 parts by weight of polyacrylonitrile and 13.00 parts by weight of N,N-dimethylformamide are mixed uniformly to form a mixed solution;

[0118] (2) Add 0.75 parts by weight of stannous chloride and 0.88 parts by weight of iron acetylacetonate into the mixed solution, and mix at 50° C. for 12 hours;

[0119] (3) The mixed solution obtained in step (2) is subjected to electrospinning to obtain the primary product. The process parameters of the electrospinning include: the inner diameter of the syringe needle is 0.6mm, the voltage of the electrospinning is 16kV, and the scanning stroke is 40mm. The flow rate is 1.0mL / h, the distance between the collecting plate and the needle is 15cm, and the spinning sample is collected to obtain the primary product;

[0120] (4) drying the initial product, drying in a vacuum oven, the drying temperature is 60°C, and...

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Abstract

The invention discloses a Fe2O3 / SnO2 composite material and a preparation method and application thereof and a lithium-ion battery and relates to the technical field of preparation of electrode materials for lithium-ion batteries. The Fe2O3 / SnO2 composite material has a fibrous microstructure. The preparation method of the Fe2O3 / SnO2 composite material comprises the following steps of adding a tinsalt and a ferric salt to an electrospinning solution, mixing evenly and then carrying out electrostatic spinning to obtain a head product; and drying the head product and carrying out thermal treatment in air atmosphere to obtain the Fe2O3 / SnO2 composite material. The Fe2O3 / SnO2 composite material disclosed by the invention has the advantages of being small in grain size, uniform in granularity,high in charge-discharge specific capacity, good in cycle performance and excellent in rate capability. The preparation method of the Fe2O3 / SnO2 composite material disclosed by the invention has theadvantages of relatively low cost and relatively high output rate, and microscopic fiber shape and form, size and arrangement of the material can be well controlled.

Description

technical field [0001] The invention relates to the technical field of preparation of lithium-ion battery electrode materials, in particular to a Fe 2 o 3 / SnO 2 Composite materials, their preparation methods, applications and lithium-ion batteries. Background technique [0002] Energy storage and conversion are current research hotspots, and lithium-ion batteries are currently the most promising energy storage technology due to their high energy density and excellent cycle performance. Among them, the negative electrode material determines the performance of the positive electrode material, and the bottleneck of high-rate charging is also on the negative electrode side, so the research on negative electrode materials is particularly important. The current commercialized graphite-based carbon anode materials have low theoretical capacity (372mAh / g) and poor safety (lithium analysis phenomenon), which cannot meet the rapid development of lithium-ion batteries. Although th...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/525H01M10/0525
CPCH01M4/364H01M4/48H01M4/525H01M10/0525Y02E60/10
Inventor 付争兵凡威震杜军王锋丁瑜杨雄
Owner HUBEI ENG UNIV
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