Spherical-like nitrogen-doped reduced graphene oxide material and application thereof

A nitrogen doping and graphene technology, applied in graphene, electrical components, battery electrodes, etc., can solve the problems of reducing polysulfide adsorption capacity, reducing accessible active sites, and uneven distribution of active materials, so as to avoid Loss of specific surface area and active sites, mitigation of shuttle effects, avoidance of adverse effects
CN110323443AInactive Publication Date: 2019-10-11BEIJING INSTITUTE OF TECHNOLOGYGY +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2019-10-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a spherical-like nitrogen-doped reduced graphene oxide material and an application thereof, and belongs to the field of battery materials. The preparation method comprises thefollowing steps of carrying out diluting on a graphene oxide water solution and then performing ultrasonic homogenization treatment, and carrying out spray drying treatment to obtain spherical-like graphene oxide powder; and next, performing grinding and mixing with a nitrogen source, and carrying out heat preserving for 0.5-6 hours at the temperature of 600-1,200 DEG C to obtain the product. Thespherical-like nitrogen-doped reduced graphene oxide material has the advantages of high conductivity, high wrinkle, large specific surface area and hierarchical pore structure; rich functional groups can be introduced by virtue of doped nitrogen atoms, so that the adverse effects caused by serious stacking of the graphene are avoided. The material and the sulfur are compounded to serve as a positive electrode material of a lithium sulfur battery, so that the uniform dispersion of the active substance can be realized, the sulfur carrying amount can be increased, the conductivity of the electrode can be improved, the " shuttle effect " can be reduced, and finally the electrochemical performance of the sulfur positive electrode is improved.
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Description

technical field

[0001] The invention relates to a quasi-spherical nitrogen-doped reduced graphene oxide material and an application thereof, belonging to the field of battery materials. Background technique

[0002] With the development of science and technology and the continuous progress of human society, the global energy system based on fossil energy is increasingly worrying about environmental degradation and energy shortages, which promotes the rapid development of new energy and renewable energy. Lithium-ion batteries as a new The green recyclable energy storage device in the energy field has the advantages of mature technology, small self-discharge, and long working time. It has been widely used in portable electronic devices, new energy electric vehicles, and energy storage industries, but it is limited by electrode materials. The theoretical specific capacity (<300mAh / g), its energy density is difficult to meet the increasingly high requirements of today's and f...

Claims

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