A hollow structure ceo 2 @c Core-shell nanocomposite material and its preparation method and application

A nano-composite material, hollow structure technology, applied in nanotechnology, structural parts, nanotechnology and other directions, to achieve the effect of simple preparation method, low energy consumption, and safe preparation process
CN108807943BActive Publication Date: 2020-12-25QILU UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QILU UNIV OF TECH
Publication Date
2020-12-25

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Abstract

The invention relates to a hollow spherical CeO2@C core-shell nano composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, preparing a CeO2 hollow sphere through a solvothermal method; then covering the surface of CeO2 with one layer of RF (Resorcinol-formaldehyde); calcining in an inert atmosphere to obtain the hollow spherical CeO2@C core-shell nano composite material. According to the hollow spherical CeO2@C core-shell nano composite material, the amount of resorcinol and formaldehyde is changed so that the thickness of a C layer of a shell can be adjusted. In the process, the preparation method is simple and a preparation process is safe, green and environmentally friendly, and has low energy consumptionand strong operability. The CeO2 prepared by the preparation method has a rough surface and has a macroporous structure; the specific surface area can be enlarged and the contact area between the CeO2 and the C layer is enlarged; the dispersion of ions and electrons is also can be promoted and the electrochemical performance is effectively improved.
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Description

technical field

[0001] The disclosure belongs to the technical field of nanomaterial synthesis, and in particular relates to a hollow structure CeO 2 @C Core-shell nanocomposites and their preparation methods and applications. Background technique

[0002] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

[0003] Due to the increasing fuel consumption, it is of great significance to develop a high-energy-density energy conversion and storage device. At present, electrochemical storage has become a research hotspot worldwide. The application of lithium-ion batteries in electronic transportation and energy storage devices has aroused widespread research interest. Lithium-ion batteries are also called secondary batteries. Their high energy density and long cycle life make them meet the urgent needs of the modern electronics industry. Among them, the application prospects of electric ve...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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