CN217847999U

CN217847999U - Current collector based on graphene-aluminum composite material

Info

Publication number: CN217847999U
Application number: CN202221922361.8U
Authority: CN
Inventors: 杨宏训; 孙孟飞; 杨书香; 马宁
Original assignee: Yunfan Zhenjiang New Energy Materials Co ltd
Current assignee: Yunfan Zhenjiang New Energy Materials Co ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2022-11-18
Anticipated expiration: 2032-07-25

Abstract

The utility model belongs to the technical field of the mass flow body, concretely relates to mass flow body based on graphite alkene aluminium combined material, including graphite alkene aluminium composite current body, a plurality of preformed holes have been seted up to the preface on the graphite alkene aluminium composite current body, the surface press forming of the graphite alkene aluminium composite current body in the outside of preformed hole has the strengthening rib, the inner wall of preformed hole link up and has seted up the infiltration clearance. The utility model has the advantages that: the preformed hole, the infiltration gap and the reinforcing rib are formed on the graphene-aluminum composite current collector formed by rolling in one step by adopting a pressing process, so that the improvement of the production efficiency, the stretchability, the structural strength and the conductivity is met.

Description

Current collector based on graphene-aluminum composite material

Technical Field

The utility model belongs to the technical field of the mass flow body, concretely relates to mass flow body based on graphite alkene aluminium combined material.

Background

The current collector is used for collecting current, and can collect the current generated by the battery active material to form larger current to be output to the outside. At present, the material of the current collector of the positive plate of the lithium ion battery is usually a metal material or an aluminum foil. The electrode plate is prepared by coating active materials on the surface of a current collector of an aluminum foil positive plate and performing a series of processes such as rolling, cutting, sheet making and the like, and can be used as a positive electrode and suitable for lithium batteries, but the current collector produced at present has low mechanical strength and conductivity and poor tensile property.

The authorization notice number is: CN 215496794U, the through holes distributed over the surface of the porous current collector, and the ion conducting layer and the lithium-philic layer arranged on the wall of the through hole, make lithium completely infiltrate into the inside of the pores, so that the current density is uniform, the current collector is not damaged due to local internal stress, the expansion of lithium metal is effectively inhibited, the formation of lithium dendrite is reduced, and the safety of the battery is improved; and in the case of the authorization notice number: in CN 202695625U, the current collector of the battery pole piece is made of stainless steel woven mesh, so as to enhance the ductility of the current collector. In the structure, the former has poor tensile property, low structural strength and conductivity, and the latter has low production efficiency, and is not suitable for the current collector made of the graphene-aluminum composite material.

SUMMERY OF THE UTILITY MODEL

To above problem, the utility model aims to: the utility model provides a mass flow body based on graphite alkene aluminium combined material, the problem that the ductility of solving graphite alkene aluminium mass flow body is poor, structural strength and conductivity are low.

In order to realize the purpose, the utility model adopts the technical scheme that: the utility model provides a mass flow body based on graphite alkene aluminium combined material, includes the graphite alkene aluminium composite current collection body, a plurality of preformed holes have been seted up to the preface on the graphite alkene aluminium composite current collection body, the surface press forming of the graphite alkene aluminium composite current collection body in the outside of preformed hole has the strengthening rib, the inner wall of preformed hole link up and has seted up the infiltration clearance.

The utility model has the advantages that: the preformed hole, the infiltration gap and the reinforcing ribs are formed on the graphene-aluminum composite current collector formed by rolling in one step by adopting a pressing process, so that the improvement of production efficiency, stretchability, structural strength and conductivity is met.

In order to improve the tensile property of the graphene-aluminum composite current collector;

as a further improvement of the above technical solution: the preformed hole is regular hexagon groove structure, and the preformed hole link up and set up on graphite alkene aluminium composite current collection body, the quantity of preformed hole is a plurality of, is the setting of order such as honeycomb on graphite alkene aluminium composite current collection body.

The beneficial effect of this improvement does: a plurality of preformed holes that the looks was set up in turn make the compound mass flow body of graphite alkene aluminium receive the flexible extension when tensile, reduce the probability of fracture.

In order to fully infiltrate lithium into the inside of the prepared holes;

as a further improvement of the above technical solution: the upper end face and the lower end face of the infiltration gap penetrate through the end faces of the two ends of the graphene-aluminum composite current collector, and the infiltration gap is of a flat square groove structure.

The beneficial effect of this improvement does: lithium in contact with the upper end and the lower end of the graphene aluminum composite current collector can be infiltrated into the infiltration gaps through the infiltration gaps under the capillary action, so that the lithium is fully infiltrated on the inner walls of the reserved holes.

In order to enable lithium to be evenly soaked on the inner wall of the reserved hole;

as a further improvement of the technical scheme: the number of the infiltration gaps is multiple, and the infiltration gaps are uniformly arranged on the inner wall of the preformed hole.

The beneficial effect of this improvement does: the evenly distributed infiltration gaps can enable lithium to be evenly infiltrated on the inner wall of the preformed hole.

In order to improve the structural strength of the graphene-aluminum composite current collector;

as a further improvement of the above technical solution: the reinforcing ribs are of a grid structure consisting of a plurality of regular hexagonal convex ribs connected in a prismatic mode.

The beneficial effect of this improvement does: the strengthening rib can effectively improve the mechanism intensity of the compound mass flow body of graphite alkene aluminium after compression moulding on the compound mass flow body of graphite alkene aluminium.

The parts of the device not involved are the same as or can be implemented using prior art.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of A of the present invention;

in the figure: 1. a graphene aluminum composite current collector; 2. reserving a hole; 3. infiltrating gaps; 4. and (7) reinforcing ribs.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in order to make those skilled in the art better understand the technical solution of the present invention, and the description in this section is only exemplary and illustrative, and should not be construed as limiting the scope of the present invention in any way.

Example 1:

as shown in fig. 1-2: the utility model provides a mass flow body based on graphite alkene aluminium combined material, includes graphite alkene aluminium composite current collection body 1, a plurality of preformed holes 2 have been seted up to the preface on the graphite alkene aluminium composite current collection body 1, the surface press forming of the graphite alkene aluminium composite current collection body 1 in the outside of preformed hole 2 has strengthening rib 4, the inner wall of preformed hole 2 link up and has seted up infiltration gap 3.

The working principle of the technical scheme is as follows: when using it for the lithium metal negative pole, preformed hole 2 provides abundant lithium storage space, the expansion space has been reserved for the lithium deposit, lithium is through the even inner wall of infiltrating preformed hole 2 of infiltrating gap 3 under the capillary action simultaneously, make current density even, when graphite alkene aluminium composite current collector 1 receives the tensile force, but the deformation extension when a plurality of preformed holes 2 that the phase set up makes graphite alkene aluminium composite current collector 1 receive the tensile, reduce cracked probability, when graphite alkene aluminium composite current collector 1 receives the shearing action force, strengthening rib 4 can effectively improve graphite alkene aluminium composite current collector 1's structural strength.

Example 2:

as shown in fig. 1-2, as a further optimization of the above embodiment, a current collector based on a graphene-aluminum composite material includes a graphene-aluminum composite current collector 1, a plurality of preformed holes 2 are sequentially formed on the graphene-aluminum composite current collector 1, reinforcing ribs 4 are formed on the surface of the graphene-aluminum composite current collector 1 outside the preformed holes 2 by compression molding, and wet gaps 3 are formed through the inner wall of the preformed holes 2. Preformed hole 2 is regular hexagon groove structure, and preformed hole 2 link up and offer on graphite alkene aluminium composite current collection body 1, the quantity of preformed hole 2 is a plurality of, is the setting of order such as honeycomb on graphite alkene aluminium composite current collection body 1.

Example 3:

as shown in fig. 1-2, as a further optimization of the above embodiment, a current collector based on a graphene-aluminum composite material includes a graphene-aluminum composite current collector 1, a plurality of preformed holes 2 are sequentially formed on the graphene-aluminum composite current collector 1, reinforcing ribs 4 are formed on the surface of the graphene-aluminum composite current collector 1 outside the preformed holes 2 by compression molding, and wet gaps 3 are formed through the inner wall of the preformed holes 2. The upper end and the lower end of the infiltration gap 3 penetrate through the end faces of the two ends of the graphene-aluminum composite current collector 1, and the infiltration gap 3 is of a flat square groove structure.

Example 4:

as shown in fig. 1-2, as further optimization of the above embodiment, a current collector based on graphene aluminum composite material includes a graphene aluminum composite current collector 1, a plurality of preformed holes 2 have been seted up on the graphene aluminum composite current collector 1 in an equal order, the surface of the graphene aluminum composite current collector 1 outside the preformed holes 2 is press-formed with reinforcing ribs 4, the inner wall of the preformed holes 2 is run through and has been seted up infiltration gap 3. The infiltration gaps 3 are multiple and are uniformly arranged on the inner wall of the preformed hole 2.

Example 5:

as shown in fig. 1-2, as a further optimization of the above embodiment, a current collector based on a graphene-aluminum composite material includes a graphene-aluminum composite current collector 1, a plurality of preformed holes 2 are sequentially formed on the graphene-aluminum composite current collector 1, reinforcing ribs 4 are formed on the surface of the graphene-aluminum composite current collector 1 outside the preformed holes 2 by compression molding, and wet gaps 3 are formed through the inner wall of the preformed holes 2. The reinforcing ribs 4 are in a grid structure formed by a plurality of regular hexagonal convex ribs connected in a prismatic mode.

The utility model discloses a theory of operation and use flow: when using it for the lithium metal negative pole, preformed hole 2 provides abundant lithium storage space, the expansion space has been reserved for the lithium deposit, lithium is through the even inner wall of infiltrating preformed hole 2 of infiltrating gap 3 under the capillary action simultaneously, make current density even, when graphite alkene aluminium composite current collector 1 receives the tensile force, but the deformation extension when a plurality of preformed holes 2 that the phase set up makes graphite alkene aluminium composite current collector 1 receive the tensile, reduce cracked probability, when graphite alkene aluminium composite current collector 1 receives the shearing action force, strengthening rib 4 can effectively improve graphite alkene aluminium composite current collector 1's structural strength.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the above technical features may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.

Claims

1. The utility model provides a mass flow body based on graphite alkene aluminium combined material which characterized in that: including the compound mass flow body of graphite alkene aluminium (1), a plurality of preformed holes (2) have been seted up to the preface on the compound mass flow body of graphite alkene aluminium (1), the surface compression moulding of the compound mass flow body of graphite alkene aluminium (1) in the outside of preformed hole (2) has strengthening rib (4), the inner wall of preformed hole (2) link up and has seted up infiltration clearance (3).

2. The current collector based on graphene aluminum composite material as claimed in claim 1, wherein: preformed hole (2) are regular hexagon groove structure, and preformed hole (2) link up and set up on graphite alkene aluminium composite current collector (1), the quantity of preformed hole (2) is a plurality of, is the setting of preface such as honeycomb on graphite alkene aluminium composite current collector (1).

3. The graphene aluminum composite-based current collector of claim 1, wherein: the upper end face and the lower end face of the infiltration gap (3) penetrate through the end faces of the two ends of the graphene-aluminum composite current collector (1), and the infiltration gap (3) is of a flat square groove structure.

4. The graphene aluminum composite-based current collector of claim 1, wherein: the number of the infiltration gaps (3) is multiple, and the infiltration gaps are uniformly arranged on the inner wall of the preformed hole (2).

5. The graphene aluminum composite-based current collector of claim 1, wherein: the reinforcing ribs (4) are of a grid structure consisting of a plurality of regular hexagonal convex ribs connected in a prismatic mode.