Reduction of alkali metal oxides and hydroxides in membranes by ex-situ surface passivation layers

JP2025532878APending Publication Date: 2025-10-03ELEVATED MATERIALS GERMANY GMBH
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Patent Information

Application Number
JP2025518039
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-09-28
Filing Date
2023-09-28
Publication Date
2025-10-03

AI Technical Summary

Technical Problem

Current lithium-ion batteries face challenges in achieving high energy capacity, efficient cycling, and reducing internal resistance, which are exacerbated by dendrite formation and inefficient solid electrolyte interface (SEI) films formed in situ during cell fabrication.

Method used

The development of an ex-situ constructed SEI film stack comprising multiple passivation layers, including lithium carbonate and lithium halide, formed on the anode surface to stabilize lithium metal electrodes, reducing dendrite growth and enhancing lithium ion diffusion.

Benefits of technology

The ex-situ SEI film stack improves lithium metal cycling performance by suppressing dendrite formation, increasing capacity, and reducing internal resistance, thereby enhancing the efficiency and safety of lithium-ion batteries.

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Abstract

Embodiments of the present disclosure include an anode for a battery that includes a substrate, a metal film disposed on the substrate, and a membrane stack disposed on the metal film. The membrane stack includes a lithium carbonate membrane and a lithium halide membrane disposed on the lithium carbonate. The lithium carbonate membrane is disposed on the metal film.
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