Preparation method for in-situ growth of graphene on surface of aluminum current collector of lithium ion battery

A lithium-ion battery, in-situ growth technology, applied in electrode current collector coating, electrode manufacturing, battery electrodes, etc., can solve the problems of tight binding of current collectors and active materials, high contact resistance, and achieve good experimental repeatability , improve the utilization rate, the effect of stable performance

Active Publication Date: 2017-02-22
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problem that existing lithium-ion battery aluminum current collector materials have high contact resistance, and the current collector is difficult to achieve a close combination with active materials, and provides an in-situ growth of graphene on the surface of the lithium-ion battery aluminum current collector preparation method

Method used

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Effect test

specific Embodiment approach 1

[0025] Specific embodiment one: the preparation method of in-situ growth graphene on the surface of a lithium ion battery aluminum current collector described in this embodiment is carried out according to the following steps:

[0026] 1. Aluminum current collector surface pretreatment:

[0027] Clean the aluminum foil sequentially with acetone solution and absolute ethanol for 1min to 5min, then place the cleaned aluminum foil in a NaOH solution with a concentration of 0.1mol / L to 6mol / L for 0.5min to 2min, and then place it in a concentration of In 0.1mol / L~5mol / L HCl solution, treat for 0.5min~2min to obtain pretreated aluminum current collector;

[0028] 2. Three-dimensional structural treatment of aluminum current collector surface:

[0029] Place the pretreated aluminum current collector in an HCl solution with a concentration of 0.01mol / L to 1mol / L, and use a DC power supply for corrosion treatment. The corrosion current is 0.1A to 5A, and the corrosion time is 1s to 3...

specific Embodiment approach 2

[0042] Embodiment 2: This embodiment is different from Embodiment 1 in that the carbon source gas described in step 5 is methane, acetylene or ethanol gas. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0043] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in Step 2, the pretreated aluminum current collector is placed in an HCl solution with a concentration of 0.02mol / L, and a DC power supply is used for corrosion treatment , the corrosion current is 1.8A, and the corrosion time is 30s. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method for in-situ growth of graphene on a surface of an aluminum current collector of a lithium ion battery, and relates to the preparation method of the aluminum current collector of the lithium ion battery, in order to solve the problem that a current collector is difficult to be closely combined with active substances due to a higher contact resistance present in aluminum current collector materials of existing lithium ion batteries. The preparation method for the in-situ growth of graphene on the surface of the aluminum current collector of the lithium ion battery comprises the following steps: first, pretreating a surface of the aluminum current collector; second, performing three-dimensional structural treatment on the surface of the aluminum current collector; third, prefabricating and presetting an oxidized graphene layer on the surface of the aluminum current collector; fourth, performing an etching process on the surface of the aluminum current collector; and fifth, growing graphene of a three-dimensional structure on the surface of the aluminum current collector, namely achieving the preparation method for the in-situ growth of graphene on the surface of the aluminum current collector of the lithium ion battery. The invention provides the preparation method for the in-situ growth of graphene on the surface of the aluminum current collector of the lithium ion battery.

Description

technical field [0001] The invention relates to a preparation method of an aluminum current collector of a lithium ion battery. Background technique [0002] In recent years, with the rapid development of my country's modern social economy and technology, the energy crisis and the environmental damage caused by traditional energy have become increasingly prominent, becoming a global problem that needs to be solved urgently. Therefore, it is the key to deal with the above-mentioned problems to develop clean, environmentally friendly and sustainable new energy sources that can replace traditional energy sources. At present, the main new energy sources that can be developed include geothermal energy, wind energy, solar energy, and tidal energy. Considering that new energy sources such as wind energy and solar energy require corresponding energy storage components for energy storage, we need to research and explore efficient, convenient, and pollution-free energy storage device...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/66
CPCH01M4/0404H01M4/0428H01M4/661H01M4/663H01M4/667Y02E60/10
Inventor 亓钧雷林景煌刘瑜琳贾赫男费维栋冯吉才
Owner HARBIN INST OF TECH
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