Small-sheet-diameter graphene powder, graphene conductive paste, preparation method of graphene conductive paste, and application

A technology of graphene powder and conductive paste, which is applied in the field of graphene, can solve the problems of difficulty in realizing industrialized production and popularization and application, difficulty in optimizing the energy density of ternary batteries, and insignificant graphene characteristics, etc., so as to be suitable for industrialization Promotion and application, low cost, easy to control the effect
CN112978722APending Publication Date: 2021-06-18HAIKE GRP RES INST OF INNOVATION & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HAIKE GRP RES INST OF INNOVATION & TECH
Publication Date
2021-06-18

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Abstract

The invention provides graphene powder. The graphene powder is obtained by conducting slit spraying stripping on graphite through a supercritical fluid. According to the invention, graphene with relatively thin thickness and relatively small sheet diameter can be prepared under the conditions of low cost and no pollution through a supercritical liquid phase narrow hole stripping technology, so that the graphene can be uniformly dispersed in an oil phase or a water phase subsequently, and the small-sheet-diameter graphene conductive paste for a lithium ion battery is prepared. According to the small-sheet-diameter graphene conductive paste provided by the invention, graphene nanocrystallization can be realized, electronic conductance can be improved as far as possible, ion resistance can be reduced, and on the premise of ensuring battery performance, the dosage of a conductive agent can be reduced as far as possible, the dosage of active substances can be improved, and the energy density of a battery can be increased as far as possible. The preparation method is low in cost, mild and pollution-free in condition, easy to control and more suitable for industrial popularization and application.
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Description

technical field

[0001] The invention belongs to the technical field of graphene, and relates to a graphene powder, a graphene conductive paste and a preparation method and application thereof, in particular to a small-diameter graphene powder, a graphene conductive paste, a preparation method and an application thereof . Background technique

[0002] Graphene is a new material with a single-layer sheet structure composed of carbon atoms. It is a carbon atom with sp 2 The hybridized orbitals form a hexagonal planar film with a honeycomb lattice, a two-dimensional material with a thickness of only one carbon atom. Since Geim et al first prepared graphene by micromechanical exfoliation method in 2004, graphene has attracted widespread attention because of its excellent properties such as high conductivity, high specific surface area, high strength and high electron mobility. In turn, it also promotes the rapid development of graphene preparation technology. It is precisely ...

Claims

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