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Preparation method and application of metal phosphide porous frame/graphene composite fiber

A composite technology of metal phosphide and graphene, which is applied to the chemical characteristics of fibers, textiles and papermaking, artificial filaments made of inorganic materials, etc., can solve the problems of low mechanical strength, electrical conductivity and flexibility, and achieve excellent electrochemical properties, The effect of uniform distribution of components and convenient operation

Inactive Publication Date: 2018-08-03
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to overcome the problems of low mechanical strength, electrical conductivity and flexibility of two-dimensional and three-dimensional graphene composite materials in the above-mentioned prior art, and provides a preparation method and application of a metal phosphide porous framework / graphene composite fiber Compared with traditional two-dimensional and three-dimensional graphene composite materials, metal phosphide porous framework / graphene composite fibers have the characteristics of high mechanical strength, high electrical conductivity and high flexibility.

Method used

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  • Preparation method and application of metal phosphide porous frame/graphene composite fiber
  • Preparation method and application of metal phosphide porous frame/graphene composite fiber
  • Preparation method and application of metal phosphide porous frame/graphene composite fiber

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Embodiment 1

[0030] A kind of preparation method of porous metal phosphide / graphene composite fiber, comprises the following steps:

[0031] (1) Preparation of Fe-MOF crystal powder: Add 50 mL of N,N-dimethylformamide into a 100 mL reaction bottle at room temperature, add 0.83 g of terephthalic acid and 1.215 g of Anhydrous ferric chloride, after it was completely dissolved, reacted in an oil bath at 100 °C for 12 h. After the reaction, centrifuge at low speed (15 min, room temperature, 4000 rpm), remove the supernatant, repeat washing with ethanol, and centrifuge 3 times. The resulting product was vacuum-dried at 60 °C for 24 h to finally obtain Fe-MOF crystal powder;

[0032](2) Preparation of metal phosphide porous framework / graphene composite fiber: Add graphene oxide DMF solution and Fe-MOF crystal powder in sequence in a 5 mL centrifuge tube, and control the initial feeding ratio of each raw material as follows: graphene oxide Solution, concentration 6.7 mg / mL, graphene oxide sheet...

Embodiment 2

[0037] A preparation method of metal phosphide porous frame / graphene composite fiber, comprising the following steps:

[0038] (1) Preparation of Co-MOF crystal powder: Take a 50 mL beaker and add a mixed solution of 20 mL of methanol and 20 mL of ethanol, dissolve 725 mg of cobalt nitrate hexahydrate in the mixed solution, and stir until completely dissolved. Add a mixed solution of 20 mL of methanol and 20 mL of ethanol to another 50 mL beaker, dissolve 821 mg of 2-methylimidazole in the mixed solution, and stir until completely dissolved. The solutions in the above two beakers were mixed and stirred evenly, and reacted at room temperature for 24 h. After the reaction, centrifuge (15 min, room temperature, 4000 rpm), remove the supernatant, and wash with methanol three times. After the product is vacuum-dried at 60 °C for 24 h, the Co-MOF crystal powder is finally obtained;

[0039] (2) Preparation of metal phosphide porous framework / graphene composite fiber: add graphene o...

Embodiment 3

[0042] The preparation method of metal phosphide porous framework / graphene composite fiber comprises the following steps: adding graphene oxide DMF solution, Fe-MOF crystal powder and Co-MOF crystal powder in sequence in a centrifuge tube of 5 mL size, controlling the concentration of each raw material The initial feeding ratio is as follows: graphene oxide solution, concentration 6.7 mg / mL, graphene oxide sheet lateral size is 50 μm; Fe-MOF crystal powder 15 mg, Co-MOF crystal powder 15 mg, graphene oxide, Fe-MOF crystal The mass ratio of powder and Co-MOF crystal powder is 4:3:3; the obtained mixture is continuously mixed by magnetic stirring for 2 min under airtight conditions to obtain a composite gel, which is the spinning solution, and the spinning solution is further wet-spun Silk, specifically: the spinning solution is continuously injected into an ethyl acetate coagulation bath through a syringe, then vacuum filtered, and dried naturally to obtain a fibrous precursor; ...

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Abstract

The invention discloses a preparation method and an application of a metal phosphide porous frame / graphene composite fiber. The metal phosphide porous frame / graphene composite fiber is prepared from afibrous compound as a precursor by calcining, and the fibrous compound is prepared from MOF (metal-organic framework) crystal powder and graphene oxide by compounding. The preparation method is simple to operate and mild in condition, the composite fiber is adjustable in morphology, controllable in structure and uniform in component distribution, structural integrity of graphene and a metal phosphide porous frame obtained by taking MOF crystals as the template is retained, excellent performance of graphene and excellent performance of the metal phosphide porous frame are combined, and the composite fiber can be produced in batches or industrially, has excellent performance as a lithium ion battery anode material and has good application prospect.

Description

technical field [0001] The invention relates to the field of composite material synthesis, in particular to a preparation method and application of a metal phosphide porous framework / graphene composite fiber. Background technique [0002] With the deteriorating global environment and the depletion of energy sources, the development and utilization of new energy sources have attracted people's attention. Among them, lithium-ion batteries have become the most popular mobile energy storage devices. Lithium-ion batteries have the advantages of high specific energy, long cycle life, high specific power, high safety, no memory effect and high output voltage, and are widely used in mobile electronic devices such as computers, mobile phones, and electric vehicles. As people's demand for energy storage devices continues to grow, the performance of existing lithium-ion batteries can no longer meet people's needs. [0003] Due to their high initial discharge capacity and small electro...

Claims

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Application Information

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IPC IPC(8): D01F9/08D01F9/10
CPCD01F9/08D01F9/10
Inventor 曹澥宏张琳刘文贤施文慧
Owner ZHEJIANG UNIV OF TECH
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