Secondary battery and manufacturing method for the same
The secondary battery design with specific Li and metal element combinations in the negative electrode active material layer enhances Coulomb efficiency by optimizing formation and decomposition reactions, addressing inefficiencies in existing metal lithium negative electrode batteries.
KR102998925B1Active Publication Date: 2026-08-03TOYOTA JIDOSHA KK
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Patent Information
- Application Number
- KR1020230134212
- Authority / Receiving Office
- KR · KR
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2023-03-13
- Filing Date
- 2023-10-10
- Publication Date
- 2026-08-03
- Estimated Expiration
- 2043-10-10
AI Technical Summary
Technical Problem
Secondary batteries with metal lithium negative electrodes have room for improvement in terms of Coulomb efficiency.
Method used
The secondary battery comprises a positive electrode active material layer, a solid electrolyte layer, and a negative electrode active material layer, where the negative electrode active material layer includes a first material, such as an alloy or compound of Li and element X, and a second material, such as a metal element M or its alloy/compound with Li, with specific formation energies configured to enhance Coulomb efficiency.
Benefits of technology
The configuration results in a secondary battery with improved Coulomb efficiency by optimizing the formation and decomposition reactions of compounds at the negative electrode.
✦ Generated by Eureka AI based on patent content.
Abstract
(Project) Improve the Coulomb efficiency of a secondary battery equipped with a metal lithium negative electrode. (Solution) The secondary battery of the present disclosure comprises a positive electrode active material layer, a solid electrolyte layer, and a negative electrode active material layer, wherein the negative electrode active material layer comprises a first material and a second material, wherein the first material is at least one of an alloy of Li and element X and a compound of Li and element X, and the second material is at least one of a single metal element M, an alloy of Li and metal element M, and a compound of Li and metal element M, and furthermore, the generation energy ELiX of the first material is lower than the generation energy EMX of the compound of metal element M and element X.
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