Method for preparing carbon-supported metal sulfide nanocomposites by electrospinning

A nanocomposite, electrospinning technology, applied in the direction of circuits, electrical components, battery electrodes, etc., can solve the problems of many steps, the inability to combine metal sulfides and carbon materials, etc., to achieve the elimination of additives or impurities, good electricity Chemical performance, highly uniform effect

CN109817936BActive Publication Date: 2022-03-08LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-03-08

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Abstract

The invention belongs to the field of metal sulfide nanomaterials, and particularly relates to a method for preparing carbon-loaded metal sulfide nanocomposites by electrospinning, including (1) preparing a spinning precursor solution: mixing thiacalixarene metal clusters and Spinning aids were dissolved in DMF and mixed together; (2) Preparation of nanofibers by electrospinning: Inhale the obtained spinning precursor solution into the syringe, adjust the flow rate and voltage of the syringe pump, and the distance between the spinning needle and the receiving plate , for spinning, accepting the nanofiber mat with a receiving plate; (3) pre-oxidizing the nanofiber mat: pre-oxidizing the collected nanofiber mat; (4) N 2 Carbonization under atmosphere: Carbonize the pre-oxidized nanofiber mat, and then cool down naturally to obtain the target product. The target product of the present invention has ideal electrochemical performance and good capacitance characteristics. The sheet carbon material is directly used as an electrode, which can eliminate additives or impurities such as binders and improve energy capacity and performance.
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Description

technical field

[0001] The invention belongs to the field of metal sulfide nanomaterials, in particular to a method for preparing carbon-loaded metal sulfide nanocomposites by electrospinning. Background technique

[0002] Transition metal sulfides have a wide range of sources and abundant active sites, and they are developing rapidly because they can be used as electrode materials for energy storage components, such as anode materials for lithium-ion batteries. However, it also has problems such as poor conductivity, serious volume expansion, and easy agglomeration, which make its cycle stability poor. Carbon materials have excellent electrical conductivity and can effectively inhibit volume expansion. Therefore, the modification of transition metal sulfides with carbon materials can not only combine the advantages of the two, but also make up for these shortcomings, and realize the improvement of material performance. However, there are some problems in the existing techn...

Examples

Embodiment 1

[0043] As shown in the figure, the method for preparing carbon-supported metal sulfide nanocomposites by electrospinning includes the following steps:

[0044] (1) Preparation of spinning precursor solution

[0045] Weigh 0.3g of load-thiacalixarene metal clusters (such as: Co 16 、Co 32 or Co 48) was dissolved in DMF (N,N-dimethylformamide), sealed with a parafilm, and stirred on a magnetic stirrer at room temperature until it was completely dissolved; at the same time, a certain proportion of spinning aid-PAN (poly Acrylonitrile) was dissolved in DMF, and stirred on a magnetic stirrer after sealing to form a uniform transparent solution; wherein the mass concentration of spinning aid was 6.8%, and the mass concentration of the load relative to spinning aid was 30%; finally The two parts of the solution are mixed together, sealed and stirred evenly, which is the spinning precursor solution;

[0046] (2) Preparation of nanofibers by electrospinning

[0047] Inhale the prep...

Embodiment 2

[0053] As shown in the figure, the method for preparing carbon-supported metal sulfide nanocomposites by electrospinning includes the following steps:

[0054] (1) Preparation of spinning precursor solution

[0055] Weigh 0.3g of load-thiacalixarene metal clusters (such as: Co 16 、Co 32 or Co 48 ) was dissolved in DMF (N,N-dimethylformamide), sealed with a parafilm, and stirred on a magnetic stirrer at room temperature until it was completely dissolved; at the same time, a certain proportion of spinning aid was weighed and dissolved in DMF ; The spinning aid is a mixture of PAN and PMMA; the mass ratio of PAN and PMMA is 7:3, and after sealing, it is stirred into a uniform transparent solution on a magnetic stirrer; wherein the mass concentration of the spinning aid is 10%, The concentration of the load relative to the spinning aid is 50%; finally, the two parts of the solution are mixed together, sealed and stirred evenly, which is the spinning precursor solution;

[0056...

Embodiment 3

[0063] (1) Preparation of spinning precursor solution

[0064] Weigh 0.3g of load-thiacalixarene metal clusters (such as: Co 16 、Co 32 or Co 48 ) was dissolved in DMF (N,N-dimethylformamide), sealed with a parafilm, and stirred on a magnetic stirrer at room temperature until it was completely dissolved; at the same time, a certain proportion of spinning aid was weighed and dissolved in DMF ; The spinning aid is a mixture of PAN and PMMA; the mass ratio of PAN and PMMA is 1:1; after sealing, it is stirred on a magnetic stirrer to form a uniform transparent solution. The concentration of the spinning aid is 12.4%, and the concentration of the load relative to the spinning aid is 40%; finally, the two parts of the solution are mixed together, sealed and stirred evenly, which is the spinning precursor solution;

[0065] (2) Preparation of nanofibers by electrospinning

[0066] Inhale the prepared spinning precursor solution into the syringe, remove air bubbles, adjust the syri...