Lithium-sulfur solid-state battery
The lithium-sulfur solid state battery design with a Li-Al alloy and specific molar ratio addresses internal short circuits, enhancing cycle characteristics and output by inhibiting dendrite growth.
JP7735669B2Active Publication Date: 2025-09-09TOKYO ELECTRIC POWER CO HOLDINGS INC
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Patent Information
- Application Number
- JP2021032233
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-03-02
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2041-03-02
AI Technical Summary
Technical Problem
Lithium-sulfur solid-state batteries face internal short circuits due to lithium metal dendrite growth, leading to poor cycle characteristics.
Method used
A lithium-sulfur solid state battery design comprising a sulfur positive electrode, a Li-Al alloy negative electrode, and a solid electrolyte with a specific molar ratio of lithium to aluminum, optionally with an electrolytic solution or gel, and a lithium ion conductive layer to enhance ion conductivity.
Benefits of technology
The battery exhibits improved cycle characteristics and higher output by preventing dendrite formation and maintaining structural integrity.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide a lithium sulfur solid-state battery in which a cycle characteristic is improved.SOLUTION: A lithium sulfur solid-state battery 1 comprises: a sulfur positive electrode 11; a Li-Al alloy negative electrode 12; and a solid electrolyte 13. The solid electrolyte is arranged between the sulfur positive electrode and the Li-Al alloy negative electrode, in which a mole ratio of a lithium and an aluminum in the Li-Al alloy negative electrode is 95:5 to 55:45. An electrolyte or an electrolyte gel may be provided between the Li-Al alloy negative electrode and the solid electrolyte. The electrolyte or the electrolyte gel may contain ion liquid.SELECTED DRAWING: Figure 1
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