Current collector preparation method

A current collector, thickness direction technology, applied in the field of current collector preparation, can solve the problems of reducing electrochemical cell capacity and energy conversion efficiency, increasing the contact resistance of electrode active material metal layer, etc., to improve battery capacity and conversion efficiency, prevent Corrosion reaction, effect of reducing contact resistance

Active Publication Date: 2016-03-30
TSINGHUA UNIV +1
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Problems solved by technology

However, these metal layers are easily oxidized to form a passivation film, or corroded in the electrolyte to form an insulating layer, which greatly increases the contact resistance between the electrode active material and the metal layer, Thereby reducing the capacity and energy conversion efficiency of the electrochemical cell

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Embodiment Construction

[0017] The current collector provided by the present invention and its preparation method will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] see figure 1 , the present invention also provides a method for preparing the current collector 10, comprising the following steps:

[0019] Step S10, providing a carbon nanotube layer 110, the carbon nanotube layer 110 including a first surface 111 and a second surface 113 opposite to each other;

[0020] Step S11, electroplating a first metal layer 120 on the first surface 111 of the carbon nanotube layer 110, and electroplating a second metal layer 130 on the second surface 113 of the carbon nanotube layer 110 to form a carbon nanotube composite layer 11; and

[0021] Step S12, tearing off the carbon nanotube composite layer 11, so that the carbon nanotube layer 110 is divided into a first sub-carbon nanotube layer 114 and a second sub-carbon nanotube layer 116, th...

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Abstract

The present invention relates to a current collector preparation method which is as follows: providing a carbon nanotube layer including a plurality of micropores and opposing first and second surfaces; electroplating a first metal layer on a first surface of the carbon nanotube layer; electroplating a second metal layer on a second surface of the carbon nanotube layer and forming a carbon nanotube composite layer; and tearing the carbon nanotube composite layer to divide the carbon nanotube composite layer into a first sub carbon nanotube layer and a second sub carbon nanotube layer, wherein the first sub carbon nanotube layer is attached to the surface of the first metal layer, and the second sub carbon nanotube layer is attached to the surface of the second metal layer.

Description

technical field [0001] The invention relates to a method for preparing a current collector, in particular to a method for preparing a current collector based on a carbon nanotube structure. Background technique [0002] The current collector is an important main component of an electrochemical cell. In electrochemical cells, the surface of the current collector usually carries electrode active materials and contacts the electrolyte, which can provide electron channels for electrochemical reactions to accelerate electron transfer, and transport electrons to external circuits to form currents. Therefore, the performance of the current collector is closely related to the performance of the electrochemical cell. [0003] Existing current collectors are usually made of conductive metal layers, such as copper foil and aluminum foil. However, these metal layers are easily oxidized to form a passivation film, or corroded in the electrolyte to form an insulating layer, which greatl...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/64
CPCC25D5/00C25D7/0614C25D5/54C25D5/48
Inventor 魏洋吴扬范守善
Owner TSINGHUA UNIV
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