Monoatomic dispersed in-situ growth nitrogen atom-doped carbon nanosphere graphene foam, preparation method and application

A graphene foam, in-situ growth technology, applied in the direction of graphene, nano-carbon, electrical components, etc., can solve the problems of irreversible capacity attenuation of lithium-sulfur batteries, low utilization rate of active materials, and reduced ionic conductivity, etc., to promote the positive electrode. Redox kinetics, good cycling and rate capability, addressing limited surface area effects
CN113104840APending Publication Date: 2021-07-13HEBEI UNIV OF TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HEBEI UNIV OF TECH
Publication Date
2021-07-13

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Abstract

The invention relates to the technical field of new energy materials, in particular to a monoatomic dispersed in-situ growth nitrogen atom-doped carbon nanosphere graphene foam, a preparation method and application, wherein carbon nanospheres grow in situ on graphene foam, and the carbon nanospheres are doped with nitrogen atoms and metal single atoms. The preparation method comprises the following steps: preparing graphene foam on the surface of a foam metal template by adopting a vapor deposition method, then growing nitrogen-containing organic nanospheres on the surface of the graphene foam in situ, calcining, and removing the foam template in sequence to obtain the graphene foam doped with nitrogen atoms and metal monatomic carbon nanospheres through in-situ growth. When the obtained composite material is applied to the lithium-sulfur battery, the utilization rate of active substances can be greatly improved, and the overall electrochemical performance is excellent.
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Description

technical field

[0001] The invention relates to the technical field of new energy materials, in particular to a monoatomically dispersed graphene foam, a preparation method and an application of carbon nanospheres doped with nitrogen atoms grown in situ. Background technique

[0002] With the rapid development of society, higher requirements are put forward for the performance of electric energy storage systems, especially for the energy density of secondary battery systems. Although traditional lithium-ion batteries have the advantages of high specific energy, high working voltage, long cycle life, and no environmental pollution, the theoretical specific capacity of commercial lithium-ion battery cathode materials generally does not exceed 300Wh kg -1 , cannot effectively meet the higher energy density requirements. Therefore, the development of a new generation of secondary battery system with high theoretical specific capacity has become the focus of current research. I...

Claims

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