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Preparation method and application of metal sulfide porous framework/graphene composite fiber

A composite technology of metal sulfide and graphene, which is applied in fiber treatment, fiber chemical characteristics, spinning solution preparation, etc., can solve the problems of low mechanical strength, electrical conductivity and flexibility, and achieve adjustable shape and mild conditions , the effect of uniform distribution of components

Inactive Publication Date: 2018-08-28
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 sulfide porous framework / graphene composite fiber Compared with traditional two-dimensional and three-dimensional graphene composite materials, metal sulfide 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 sulfide porous framework/graphene composite fiber
  • Preparation method and application of metal sulfide porous framework/graphene composite fiber

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Embodiment 1

[0029] A preparation method of porous metal sulfide / graphene composite fiber, comprising the following steps:

[0030] (1) Preparation of Fe-MOF crystal powder: Add 50 mL of N,N-dimethylformamide into a 100 mL reaction flask 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;

[0031](2) Preparation of metal sulfide 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 lateral dim...

Embodiment 2

[0036] A preparation method of metal sulfide porous framework / graphene composite fiber, comprising the following steps:

[0037] (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;

[0038] (2) Preparation of metal sulfide porous framework / graphene composite fiber: Add graphene o...

Embodiment 3

[0041] The preparation method of metal sulfide 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 6.7mg / 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 powder The mass ratio of Co-MOF crystal powder and Co-MOF crystal powder is 4:3:3; the obtained mixture is continuously mixed for 2 min under airtight conditions by magnetic stirring to obtain a composite gel, which is the spinning solution, and the spinning solution is further wet-spun , 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 fibr...

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Abstract

The invention discloses a preparation method of metal sulfide porous framework / graphene composite fiber. The metal sulfide porous framework / graphene composite fiber is obtained through calcination with a fiber-like compound prepared by compounding MOF crystal powder and graphene oxide as a precursor. The preparation method is simple to operate, conditions are mild, the shape is adjustable, the structure is controllable, component distribution is uniform, the structural integrity of a metal sulfide porous framework obtained with graphene and MOF crystals as templates is kept, excellent properties of graphene and properties of the metal sulfide porous framework are integrated, the fiber can be produced in batches or industrially produced, and the fiber serves as a lithium ion battery negative electrode material, is excellent in performance and has a 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 sulfide porous framework / graphene composite fiber. Background technique [0002] With the development of energy storage technology, 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 the high theoretical specific capacity of transition metal sulfides and wide sources of sulfur, transition metal sulfides have attracted widespread attention as electrode materials for l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/06D01D5/30D01D1/02D01D10/02D01F8/18H01M4/36H01M4/58H01M4/583H01M10/0525
CPCD01D1/02D01D5/06D01D5/30D01D10/02D01F8/16D01F8/18H01M4/362H01M4/5815H01M4/583H01M10/0525Y02E60/10
Inventor 曹澥宏张琳刘文贤施文慧
Owner ZHEJIANG UNIV OF TECH
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