A high-magnesium-content lithium-magnesium alloy / copper composite foil negative electrode for inhibiting lithium dendrite growth and a preparation method thereof

Through the composite rolling method of high-magnesium content lithium-magnesium alloy and copper, the problem of insufficient ability of lithium-magnesium alloy in the prior art in suppressing the growth of lithium dendrites is solved, and the longer cycle life and higher safety of lithium batteries are achieved. sex.

CN115036470BActive Publication Date: 2025-02-07QINGDAO NINEX NEW ENERGY TECH CO LTD +1
View PDF 3 Cites 0 Cited by

Patent Information

Application Number
CN202210428423.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-04-22
Publication Date
2025-02-07
Estimated Expiration
2042-04-22

AI Technical Summary

Technical Problem

The existing lithium-magnesium alloys lack sufficient ability to inhibit the growth of lithium dendrites, resulting in a decrease in the specific capacity of lithium batteries and an increase in safety risks during the circulation process.

Method used

The negative electrode foil was prepared by composite rolling with high magnesium content lithium-magnesium alloy (magnesium content 40%-50%, lithium content 50%-60%) and copper. Through the optimization of the structure and composition of the composite material, the growth of lithium dendrites was significantly improved. inhibitory effect.

Benefits of technology

This method significantly improves the inhibitory ability of lithium dendrites, extends the cycle life of lithium batteries, enhances the safety of the battery, and maintains excellent mechanical properties.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN115036470B_ABST
    Figure CN115036470B_ABST
Patent Text Reader

Abstract

The invention discloses a high-magnesium-content lithium-magnesium alloy / copper composite foil negative electrode for inhibiting the growth of lithium dendrites and a preparation method thereof; the negative electrode is formed by composite rolling of lithium-magnesium alloy foil and copper foil, the mass percentage of magnesium in the lithium-magnesium alloy foil is 40%-50%, and the mass percentage of lithium is 50%-60%. The lithium-magnesium alloy / copper composite foil negative electrode of the invention has a high magnesium content, the mass percentage of magnesium in the lithium-magnesium alloy foil is 40%-50%, and the lithium-magnesium alloy / copper composite foil negative electrode within the alloy ratio range has a very excellent ability to inhibit the growth of lithium dendrites, and other properties such as mechanical properties are also very excellent.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Lithium-sulfur secondary battery employing magnesium-lithium alloy with high magnesium content as negative pole

    CN106784770A

  • Multi-element lithium-magnesium alloy negative electrode material for high-cycle-stability secondary battery and adaptive electrolyte thereof

    CN110797524A

  • Preparation method of lithium magnesium alloy negative electrode material with high magnesium content

    CN113385645A