A roll-to-roll manufacturing method of vertical graphene

Abstract

The invention relates to a reel-to-reel manufacturing method for upright graphene. Micro structures with a depth-to-width ratio are continuously prepared by utilizing a roller imprinting technology; agraphene flowing directed assembling behavior is modulated by utilizing the micro structures; an effect that an assembling mode of a graphene slice layer is changed into an upright directed assembling from horizontal layered stacking is achieved; and reel-to-reel large-scale preparation of the upright graphene is implemented. The reel-to-reel manufacturing method disclosed by the invention can beused for a sandwich structural supercapacitor; according to the reel-to-reel manufacturing method, an electric field direction is parallel to an orientation of the slice layer, a rapid ion channel isformed, a problem of a restrictive relation between a large film thickness and a high load of the graphene supercapacitor and an ion transport distance is solved, and meanwhile, limitation of an interdigital structural micro supercapacitor to load capacity is broken through; and the reel-to-reel manufacturing method is applicable to a chip radiator, heat can be led to be directionally conducted along a direction with high heat conductivity, high-efficiency heat dissipation in a limited space is implemented, and the reel-to-reel manufacturing method has important significance for manufacturingintegrated chips such as a CPU and the like.

Description

technical field [0001] The invention belongs to the technical field of oriented graphene film preparation, and in particular relates to a roll-to-roll manufacturing method of vertical graphene. Background technique [0002] Due to its unique single-atom-thick two-dimensional planar structure, graphene has a large theoretical specific surface area (2630m 2 / g), good conductivity (resistivity as low as 10 -6 Ωcm), thermal conductivity and excellent mechanical properties are considered to be ideal electrode materials for supercapacitors. Although graphene is an ideal electrode material for supercapacitors, not all graphene electrodes can exhibit excellent charge storage capacity. Studies have shown that graphene electrodes must meet certain conditions in order to take advantage of graphene's physical properties. (1) When the two-dimensional graphene sheets in the graphene electrode are perpendicular to the charging / discharging electric field, the diffusion movement of electro...

AI Technical Summary

Problems solved by technology

Therefore, the graphene electrode film obtained by the liquid phase self-assembly method has the characteristics of layered stacking, and it cannot take advantage of its physical properties in a supercapacitor with a sandwich structure (graphene sheets are perpendicular to the charge and discharge electric field), while the sandwich structure is The easiest supercapacitor structure for roll-to-roll continuous fabrication

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