Current collector modification method, and modified current collector and application thereof

A current collector and modification technology, applied in the field of current collector modification research, can solve the problem of high cost of current collector modification, and achieve the effects of low cost of raw materials, long cycle life, and easy commercial promotion.
CN113036071AActive Publication Date: 2021-06-25JIANGHAN UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGHAN UNIVERSITY
Publication Date
2021-06-25

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Abstract

The invention provides a current collector modification method, and a modified current collector and application thereof. The method comprises the following steps: mixing metal oxide powder with alkali metal amino salt, conducting heating to 280-350 DEG C under the condition of protective gas, and carrying out heat preservation for 3-6 hours to implement a nitridation reaction so as to obtain metal nitride; preparing turbid liquid from the metal nitride; and placing a foam metal current collector into the turbid liquid, conducting heating to 50-80 DEG C under the condition of protective gas or vacuum used by the nitridation reaction, and keeping the temperature for 10-20 minutes so as to allow the nitride to be loaded on the foam metal, thereby finishing the modification of the current collector. According to the nitride modified current collector provided by the invention, in a coulombic efficiency test, cycle life is 155-280 circles, fitting impedance is 21-33 ohm after ten circles of circulation, cycle life is long, the impedance is low, and good performance is obtained; and meanwhile, a relatively long service life of 660-1000 h can be obtained in a symmetrical battery test.
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Description

Technical field

[0001] The present invention belongs to the technical field of collective fluid modification studies in lithium metal batteries, and in particular, the present invention relates to a combination fluid modification method, a modified current fluid and an application. Background technique

[0002] The collector refers to the structure or part of the collection current, which mainly refers to a metal foil, such as a copper foil, an aluminum foil, or a foam metal such as foam, foam nickel and foam, and the collector as an ion. The foil used in the battery is modified to improve the performance of the lithium battery, so it is expected to help the lithium metal battery boom and have business prospects. Therefore, in recent years, it has been widely concerned by constructing a three-dimensional host structure to suppress dendrites. However, the three-dimensional metal host structure is still facing problems such as uneven lithium deposition and dendrite growth due to po...

Claims

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