Lithium magnesium composite negative electrode, its preparation method, and prepared lithium sulfur battery and all-solid-state battery
By adopting an alloy negative electrode containing lithium and magnesium, and preparing it through heat treatment and multiple rollback processes, the problem of insufficient energy density and safety in the battery in the prior art is solved, and the battery performance with high energy density and long life is achieved.
JP2025507366AInactive Publication Date: 2025-03-18HEFEI GUOXUAN HIGH TECH POWER ENERGY
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Patent Information
- Application Number
- JP2024547552
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2022-06-21
- Filing Date
- 2022-11-09
- Publication Date
- 2025-03-18
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Technical Problem
The prior art is difficult to provide a lithium-magnesium alloy negative electrode that can efficiently provide high energy density and good safety in a battery.
Method used
A lithium magnesium alloy negative electrode containing 50-65 wt% lithium metal, 35-50 wt% magnesium metal and 0.01-15 wt% auxiliary metal elements (such as Cu, Al, Zn, Fe, Ni, Zr or Y), was prepared by heat treatment and multiple rollback processes to prepare a lithium magnesium alloy negative electrode with excellent plastic working forming ability.
Benefits of technology
It realizes the high energy density and long life of the negative electrode of lithium magnesium alloy, solves the problem of lithium metal processing, and supports large-scale production.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention relates to the technical field of secondary batteries, and discloses a lithium-magnesium composite anode and its preparation method, as well as the prepared lithium-sulfur battery and all-solid-state battery, which comprises metallic lithium, metallic magnesium and auxiliary metal elements, the metallic lithium content being 50-65wt%, the metallic magnesium content being 35-50wt%, the auxiliary metal element content being 0.01-15wt%, and the auxiliary metal elements including one or any combination of Cu, Al, Zn, Fe, Ni, Zr or Y. The beneficial effects of the present invention are as follows: the lithium-magnesium composite anode of the present invention has good plastic processing formability, a thin thickness and a low density, improves the volumetric energy density and weight energy density of the battery, and can greatly extend the cycle life and improve the capacity retention rate of the battery under the premise that the lithium metal is continuously reduced in the charging and discharging process, the lost active lithium is constantly replenished, and the safety is guaranteed, and the application of the same to lithium-sulfur batteries and all-solid-state metal batteries does not require an additional current collector and greatly reduces the weight of the battery.
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