A multi-core multi-shell hollow material encapsulating nanoparticles and its preparation method and application

A nanoparticle and metal nanoparticle technology, applied in the field of multi-core multi-shell hollow materials and their preparation, can solve the problems of short cycle life, low energy density, poor rate performance, etc., achieve good cycle stability and increase volume Effects of Capacity Density and High Energy Density
CN113363434BActive Publication Date: 2022-06-14INST OF PROCESS ENG CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF PROCESS ENG CHINESE ACAD OF SCI
Publication Date
2022-06-14

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Abstract

The invention relates to the technical field of functional materials, and relates to a multi-core multi-shell hollow material encapsulating nanoparticles, a preparation method and application thereof. The method comprises the following steps: 1) heating and reacting the carbon source aqueous solution to obtain a carbon sphere template; 2) dispersing the carbon sphere template obtained in step 1) in a metal salt solution to obtain a solid precursor; 3) obtaining a solid precursor in step 2). The solid precursor is roasted to obtain a hollow multi-shell metal oxide material; 4) the hollow multi-shell metal oxide material obtained in step 3) is dispersed in a tris buffer solution containing a dopamine monomer to obtain A composite material in which each shell layer of the metal oxide multi-shell layer is coated with a dopamine polymer; 5) the composite material obtained in step 4) is calcined at a high temperature in an inert protective atmosphere or under vacuum to obtain a multi-core multi-shell layer encapsulating nanoparticles hollow material. The material can maintain a specific capacity of 900mAh / g, far exceeding the performance of commercial nanoparticles of the same composition.
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Description

Technical field

[0001] The present invention relates to the technical field of functional materials, in particular, to a multi-core multi-shell hollow material encapsulating nanoparticles and a preparation method and application thereof. Background

[0002] In recent years, with the continuous depletion of traditional fossil fuels (mainly including coal, oil and natural gas) and the environmental pollution and greenhouse effect problems caused by continuous use, some renewable clean energy such as wind, solar, and tidal energy have received more and more attention. Unlike traditional fuels, these clean energy sources have discontinuities, instabilities, and disadvantages that can only be used in energy sources during large-scale use. The secondary battery system of electrochemical energy storage is one of the important ways to achieve clean energy conversion and storage. Lithium-ion batteries play a very important role in the field of electrochemical energy storage due to their l...

Claims

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