Lithium ion batteries including coated solid-state

By forming a lithium-philic layer on the solid electrolyte surface of the lithium-ion battery, combined with the bodyless lithium-ion battery design, the existing lithium-ion battery packs are solved in terms of performance and size improvement space, achieving higher energy density and smaller Size, while improving the cycle life and usable life of the battery.

CN119495804APending Publication Date: 2025-02-21GM GLOBAL TECHNOLOGY OPERATIONS LLC
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Patent Information

Application Number
CN202311562342.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-08-16
Filing Date
2023-11-22
Publication Date
2025-02-21

AI Technical Summary

Technical Problem

There is room for improvement in existing lithium-ion battery packs in terms of performance and size, especially the challenge of maintaining the overall performance of the battery while achieving high energy density and reducing size.

Method used

The bodyless lithium-ion battery design is adopted, including a lithium metal anode, a cathode with a lithium embedded material and a battery structure with a lithium-philic layer on the surface of the solid electrolyte. The lithium-philic layer consists of metal oxides, is formed by deposition of a non-aqueous precursor solution, and defines an electroplating lithium layer between the lithium metal anode and the current collector.

Benefits of technology

Through the presence of the lithium-philic layer, the wetting and interface contact between lithium metal and solid electrolyte are improved, the interface resistance is reduced, the cycle life and usable life of the battery are improved, while achieving higher energy density and smaller size.

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Abstract

Lithium ion batteries and methods for producing such batteries are provided. The lithium ion battery includes: a lithium metal anode including a current collector and a lithium metal layer; a cathode having a lithium intercalation material; and a solid state electrolyte (SSE) having a lithium-philic layer on a surface of the SSE. The lithium-philic layer includes a metal oxide. In one example, a lithium-philic layer is formed by depositing a non-aqueous precursor solution on a surface of a solid state electrolyte (SSE), where the precursor solution includes a metal nitrate, and decomposing the precursor solution to form the lithium-philic layer.
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