A preparation method of a three-dimensional ordered porous copper current collector

Abstract

The invention relates to the field of lithium ion negative electrode materials, in particular to a preparation method of a three-dimensional ordered porous copper current collector. The method comprises: 1) using wood flour to absorb and capture copper-containing waste liquid, and filtering and separating to obtain filter residue and filtrate; 2) performing acid treatment on kenaf stalks, using the filter residue to prepare a suspension, placing kenaf stalks horizontally, Immerse in the suspension to absorb the filter residue to obtain a layered flaky template; 3) Add additives to the separated filtrate, and rotary evaporate to obtain a concentrated solution; 4) Laminate the flaky template and the copper substrate on the Low-pressure immersion in lye, after the immersion, take out and immerse in the concentrated solution, repeat several times to obtain the precursor; 5) place the precursor in a special atmosphere for calcination, and obtain a three-dimensional ordered porous copper current collector after calcination. The invention obtains a graded porous template through kenaf stalk powder and wood powder, provides a larger space, reduces local current density, and inhibits the continuous accumulation of lithium dendrites in the growth process.

Description

technical field [0001] The invention relates to the field of negative electrode materials for lithium metal batteries, in particular to a method for preparing a three-dimensional ordered porous copper current collector. Background technique [0002] Lithium batteries are the primary power source for consumer electronics and are also being actively developed for electric vehicles and grid-scale energy storage. However, due to the limitation of electrode materials, the current commercial lithium-ion batteries have been difficult to meet the increasingly high performance requirements of the current energy storage market. [0003] Lithium metal batteries have received great attention due to their higher specific capacity (3860mAh g-1) and lower redox potential (-3.04V vs standard hydrogen electrode) than Li-ion batteries. Although the research started half a century ago, the growth and accumulation of lithium dendrites still exist during the cycling process of lithium metal bat...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem that the negative electrode material of the existing lithium metal battery has poor lithium ion deposition effect, and if a good lithium ion deposition effect is to be produced, the preparation cost of the negative electrode material is too high, that is, the performance and cost cannot be balanced, and the cost performance is low. Provided is a method for preparing a three-dimensional ordered porous copper current collector

Images