Manufacturing method of lithium ion battery negative electrode structure and lithium ion battery negative electrode structure

Abstract

The invention relates to the technical field of battery negative electrode structures, in particular to a manufacturing method of a lithium ion battery negative electrode structure and the lithium ionbattery negative electrode structure. The method comprises the following steps of providing a current collector plate; attaching a porous nano template to the current collector plate; forming a plurality of nano array columns in holes of the porous nano template in a pulse laser deposition manner; and removing the porous nano template, fixing the removed nano array columns to the current collector plate in a protruding array manner, wherein the diameter of the nano array columns ranges from 90 nm to 300 nm, the height of the nano array columns ranges from 50 nm to 400 nm, and the distance between the nano array columns ranges from 65 nm to 125 nm. The method is reliable in preparation process, high in repeatability, simple in raw material and good in sample crystallinity, and the introduction of impurities can be well avoided. The nano array columns on the battery negative electrode are highly ordered and are tightly combined with the current collector plate, so that excellent conductivity and ultralow ion diffusion resistance can be provided.

Description

technical field [0001] The invention relates to the technical field of battery negative pole structures, in particular to a manufacturing method of the lithium ion battery negative pole structure and the lithium ion battery negative pole structure. Background technique [0002] With the continuous consumption of fossil energy and the pursuit of clean and non-polluting energy, the development of new energy is one of the eternal themes of contemporary times. Rechargeable batteries are widely used in the field of electrochemical energy storage. Among them, lithium-ion batteries have dominated the market in consumer electronics, electric vehicles and other fields due to their high energy density, small size, light weight, and long service life. status. At present, carbon materials are usually used for the negative electrode of lithium-ion batteries, and graphite has been used in commercial lithium-ion battery negative electrodes. However, the theoretical specific capacity of c...

AI Technical Summary

Problems solved by technology

[0004] At present, the preparation of nano-Fe 3 o 4 Most of the methods of materials are hydrothermal method, thermal decomposition, co-precipitation method, etc. Co-precipitation method is simple, convenient and easy to implement, but most of the precipitates are in colloidal state, which is difficult to filter and wash, and it is easy to introduce impurities. Large, easy to aggregate together, ferromagnetic material is ferromagnetic, and there is magnetic attraction between particles, so it is easier to aggregate together

Therefore, the agglomeration phenomenon of the product obtained by the co-precipitation method is very obvious, and it will seriously affect the performance of the battery when used as the negative electrode of the battery.

Although the agglomeration phenomenon has been alleviated by the hydrothermal method, it still exists obviously, and it will also affect the performance of the battery when used as the negative electrode of the battery.

The thermal decomposition method first needs to synthesize ferric oleate as a thermal decomposition precursor; the synthesis of ferric oleate has a great influence on the subsequent results, the system is relatively complex, and impurities are easily introduced, and the use of the negative electrode of the battery will also affect the performance of the battery

Images