Current collector structure

A technology of current collection and layer structure, which is applied to structural parts, circuits, electrical components, etc., can solve the problems of poor adhesion, difficulty in implementation, and difficult control of uniformity, and achieve the effect of increasing adhesion strength, low contact resistance, and improving performance

Active Publication Date: 2015-03-18
北京烯创科技有限合伙企业(有限合伙)
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the great inherent difference between graphite materials and metal materials and poor affinity, graphene has poor adhesion to metal foils, and the interface between the two will instead form a resistance layer, and the graphene current is prepared by impregnation. The collection layer, for the thickness of the coating, its uniformity is difficult to control
Therefore, this patent has the difficulty of implementing on the preparation of graphene-coated metal foil

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Embodiment Construction

[0014] The embodiments of the present invention will be described in more detail below with reference to the drawings and reference numbers, so that those skilled in the art can implement them with reference to the description.

[0015] refer to figure 1 , is a schematic cross-sectional view of the current collection layer structure of the present invention. Such as figure 1 As shown, the current collecting layer structure 1 of the present invention includes a metal foil base layer 10 and a graphene conductive layer 20, and the metal foil base layer is selected from any one of aluminum foil, copper foil, titanium foil, and nickel foil. The graphene conductive layer 20 is arranged on at least one surface of the metal foil base layer 10, with a thickness of 0.1 μm to 5 μm, and a resistance value of less than 1Ω·cm; the graphene conductive layer 20 includes a plurality of graphene sheets, and a polymer bonding agent, the polymer adhesive is used to adhere the graphene sheet to ...

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Abstract

A current collector structure includes a metal foil substrate and a graphene conductive layer provided on at least one surface of the metal foil substrate. The graphene conductive layer includes a plurality of graphene sheets and a polymer binder used to bind the graphene sheets together and to adhere the graphene sheets onto the metal foil substrate. The conductive layer has a thickness of 0.1 μm to 5 μm and a resistance less than 1 Ω-cm. The polymer binder increases the adhesion force, such that the integrated conductive network is thus formed. Since the polymer binder is well compatible with the binder as the active material contained in the electrochemical element. The active material of the electrochemical element is thus tightly bound with the graphene conductive layer so as to minimize the contact resistance and greatly improve the performance of the electrochemical element.

Description

technical field [0001] The invention relates to a current collecting layer structure, especially comprising a graphene conductive layer. Background technique [0002] Single-layer graphite, also known as graphene, is a two-dimensional honeycomb lattice structure in which a single layer of carbon atoms is tightly packed with graphite bonds (sp2), so it is only one carbon atom thick and graphite bonds It is a compound bond of covalent bond and metal bond, which can be said to be the perfect combination of insulator and conductor. In 2004, Andre Geim and Konstantin Novoselov of the University of Manchester in the United Kingdom successfully used adhesive tape to peel off graphite, confirming that a single layer of graphene can be obtained, and won the 2010 Nobel Prize in Physics. [0003] Graphene is currently the thinnest and hardest material in the world. Its thermal conductivity is higher than that of carbon nanotubes and diamonds. At room temperature, its electron mobility...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/04H01B1/02H01B5/00
CPCH01M4/667H01M4/663Y02E60/10
Inventor 吴以舜谢承佑郑叡骏谢淑玲陈静茹
Owner 北京烯创科技有限合伙企业(有限合伙)
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