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Method for modifying current collector, current collector and energy storage device

A current collector and carbon source gas technology, applied in the field of microelectronics, can solve the problem of small number of contact points

Active Publication Date: 2018-07-31
HUAWEI TECH CO LTD
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Problems solved by technology

[0004] The present application provides a method for modifying a current collector, a current collector and an energy storage device to solve the problem of a small number of contact points between the current collector and the electrode in the prior art

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[0019] In order to make the purpose, technical solution and advantages of the application clearer, the application will be further described in detail below in conjunction with the accompanying drawings.

[0020] A plurality referred to in this application refers to two or more than two. In addition, it should be understood that in the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or imply order. The term "and / or" in this application is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and / or B, which may mean: A exists alone, A and B exist simultaneously, and A and B exist alone. There is a case of B.

[0021] Chemical vapor deposition (chemical vapor deposition, CVD) refers to the introduction of gase...

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Abstract

The invention discloses a method for modifying a current collector, the current collector and an energy storage device to overcome the problem of a few contact points between current collectors and electrodes in the prior art. The method comprises the following steps: allowing a carbon nanotube array perpendicular to the substrate of the current collector to grow on the substrate of the current collector; and allowing a graphene layer perpendicular to the carbon nanotube array to grow on the current collector substrate with the carbon nanotube array.

Description

technical field [0001] The present application relates to the field of microelectronic technology, in particular to a method for modifying a current collector, a current collector and an energy storage device. Background technique [0002] In energy storage devices such as batteries and supercapacitors, the function of the current collector is to conduct concentrated conduction of the charges stored in the electrodes. However, due to the large surface roughness of the electrode material and the relatively smooth surface of the current collector, there are only a small number of contact points between the current collector material and the electrode material, and then a shrinkage diffusion resistance is formed on the interface between the two, hindering the transmission of charges. and collection, reducing the power density of energy storage devices. [0003] In the prior art, a three-dimensional foam current collector is usually used, such as nickel foam, etc., although the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66
CPCH01M4/663H01M4/666H01G11/24H01M4/66Y02E60/10
Inventor 杨婉璐李阳兴许国成
Owner HUAWEI TECH CO LTD
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