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Preparation method and application of FeS2-C nano composite material with hollow core-shell structure

A nanocomposite material and core-shell structure technology, applied in the field of energy nanomaterial preparation, can solve the problems of insufficient purity of nanocomposite materials, insufficient uniformity of size and shape, and poor stability of device performance, etc., to facilitate large-scale production , improve electrochemical performance, improve the effect of conductivity

Inactive Publication Date: 2020-07-31
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, currently synthesized FeS 2 The purity of nanocomposites is usually not high enough, and the uniformity of size and shape is not good enough, resulting in poor device performance stability, and the existing preparation processes usually use expensive surfactants, complex precursors, toxic organic reagents or Solvents, etc., the process operation is complicated, the yield is low, and the cost is high, which is not conducive to large-scale production and environmental protection

Method used

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  • Preparation method and application of FeS2-C nano composite material with hollow core-shell structure
  • Preparation method and application of FeS2-C nano composite material with hollow core-shell structure
  • Preparation method and application of FeS2-C nano composite material with hollow core-shell structure

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Effect test

Embodiment 1

[0031] A hollow core-shell FeS 2 The preparation method of @C nanocomposite material, the hollow core-shell structure FeS 2 The raw materials for the preparation of @C nanocomposites include ferric chloride, dipotassium hydrogen phosphate, and urea, and the hollow core-shell structure FeS 2 @C nanocomposites are prepared by the following steps:

[0032]Step (1): Take 1.0g of ferric chloride and add 40ml of water to form an aqueous solution of ferric chloride, then add 2.4g of dipotassium hydrogen phosphate and 0.7g of urea, then mix the aqueous solution of ferric chloride with 2.4g of dipotassium hydrogen phosphate Stir well with 0.7g urea in a water bath at 25°C, and finally transfer to a preheated oven at 170°C to fully react for 10 hours to obtain Fe 2 o 3 nanospheres.

[0033] Step (2): get the prepared Fe 2 o 3 Add 10 mg of nanospheres into a mixed solution of 5 ml of ethanol and 35 ml of water to fully ultrasonically disperse for 30 minutes, then add 300 μl of pyrr...

Embodiment 2

[0036] A hollow core-shell FeS 2 The preparation method of @C nanocomposite material, the hollow core-shell structure FeS 2 The raw materials for the preparation of @C nanocomposites include ferric chloride, dipotassium hydrogen phosphate, and urea, and the hollow core-shell structure FeS 2 @C nanocomposites are prepared by the following steps:

[0037] Step (1): Take 1.0g of ferric chloride and add 40ml of water to form an aqueous solution of ferric chloride, then add 2.4g of dipotassium hydrogen phosphate and 0.7g of urea, then mix the aqueous solution of ferric chloride with 2.4g of dipotassium hydrogen phosphate Mix well with 0.7g urea in a water bath at 25°C, and finally transfer to a preheated oven at 170°C to fully react for 10 hours to obtain Fe 2 o 3 nanospheres.

[0038] Step (2): get the prepared Fe 2 o 3 Add 10 mg of nanospheres into a mixed solution of 20 ml of ethanol and 20 ml of water to fully ultrasonically disperse for 30 minutes, then add 300 μl of pyr...

Embodiment 3

[0041] A hollow core-shell FeS 2 The preparation method of @C nanocomposite material is characterized in that: the hollow core-shell structure FeS 2 The raw materials for the preparation of @C nanocomposites include ferric chloride, dipotassium hydrogen phosphate, and urea, and the hollow core-shell structure FeS 2 @C nanocomposites were prepared by the following steps:

[0042] Step (1): Take 1.0g of ferric chloride and add 40ml of water to form an aqueous solution of ferric chloride, then add 2.4g of dipotassium hydrogen phosphate and 0.7g of urea, then mix the aqueous solution of ferric chloride with 2.4g of dipotassium hydrogen phosphate Mix well with 0.7g urea in a water bath at 25°C, and finally transfer to a preheated oven at 150°C to fully react for 12 hours to obtain Fe 2 o 3 nanospheres.

[0043] Step (2): get the prepared Fe 2 o 3 Add 100 mg of nanospheres into a mixed solution of 20 ml of ethanol and 20 ml of water to fully ultrasonically disperse for 30 minu...

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Abstract

The invention discloses a preparation method and application of a FeS2-C nano composite material with a hollow core-shell structure. According to the preparation method, Fe2O3 is used as a core material; the hollow core-shell structure Fe2O3 and PPy composite microsphere is formed by taking Fe2O3 and PPy as raw materials and polypyrrole as a coating layer through a one-step hydrothermal method, the dispersity of ferric oxide is improved through coating of polypyrrole, agglomeration of the materials is avoided, and the hollow core-shell structure FeS2 and C composite microsphere can be obtainedthrough a further vulcanization and calcination strategy. By adopting the method, the pollution caused by production is reduced, the utilization rate of the material is improved, the production energy consumption is reduced, most importantly, the FeS2-C composite microsphere with the hollow core-shell structure can be obtained by adopting a simple, convenient and efficient two-step strategy, andthe production efficiency of the material is improved to a great extent. The FeS2-C composite microsphere with the special structure shows excellent electrode material performance and has a good application prospect.

Description

technical field [0001] The invention relates to the field of preparation of energy nanometer materials. More specifically, it involves a hollow core-shell FeS 2 Preparation methods and applications of @C nanocomposites. Background technique [0002] Although the current lithium-ion battery technology is relatively mature, there are still problems such as poor safety, short service life, poor low temperature performance and high cost. Metal sodium has the advantages of abundant resources and low price, and more and more researchers are devoted to the research of sodium-ion batteries. However, the radius of sodium ions (102pm) is larger than that of lithium ions (76pm), and the selection of electrode materials has become a key issue for sodium-ion batteries. Pyrite (FeS 2 ) is rich in crustal resources, green and environmentally friendly, with a theoretical capacity of up to 894mAhg -1 , is an ideal material for secondary batteries. However, this material will undergo vo...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/366H01M4/5815H01M4/62H01M4/625H01M4/628H01M10/054Y02E60/10
Inventor 程琳杨振明曹睿刘爱萍许为中魏磊陈冠政
Owner ZHEJIANG SCI-TECH UNIV
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