Samsung patents solid-state battery cathode with uniform material mix
Samsung has filed a patent for a cathode component used in solid-state batteries, which are a next-generation battery type that uses solid materials instead of liquid electrolytes. The design focuses on ensuring that specific chemical elements are evenly distributed throughout the cathode, both on the surface and inside, to maintain consistent performance.
In the filing’s own words
A cathode for a solid-state secondary battery, a method of manufacturing the cathode, and a solid-state secondary battery including the cathode, wherein the cathode includes a cathode active material including a metal M1, and a catholyte including an ionic liquid and a lithium salt, wherein at least one of the ionic liquid and the lithium salt includes an element M2, the cathode has a surface region and an internal region, a relative standard deviation of a ratio R of a weight of the element M2 of the catholyte to a weight of the metal M1 of the cathode active material, obtained by scanning electron microscope-energy dispersive x-ray spectroscopy (SEM-EDS) analysis on the surface region and the internal region, is 10% or less, and the element M2 is different from the metal M1.
What exactly they claim (claim 1)
1. A cathode for a solid-state secondary battery, the cathode comprising: a cathode active material comprising a metal M1; and a catholyte comprising an ionic liquid and a lithium salt, wherein at least one of the ionic liquid and the lithium salt includes an element M2, the cathode has a surface region and an internal region, a relative standard deviation of a ratio R of a weight of the element M2 of the catholyte to a weight of the metal M1 of the cathode active material, obtained by scanning electron microscope-energy dispersive x-ray spectroscopy (SEM-EDS) analysis on the surface region and internal region, is 10% or less, and the element M2 is different from the metal M1.
Facts
- Company
- Samsung (Samsung Electronics Co., Ltd.)
- Official title
- CATHODE, METHOD OF MANUFACTURING THE CATHODE, AND SOLID-STATE SECONDARY BATTERY INCLUDING THE CATHODE
- Publication number
- US20260312025A1
- Application number
- 19461956
- Filed
- Jan 28, 2026
- Published
- Oct 8, 2026
- Inventors
- 8
- Claims
- 20
Classified under
H01M 4/525 Electricity & electronicsH01M 4/0404 Electricity & electronicsH01M 4/1391 Electricity & electronicsH01M 4/1397 Electricity & electronicsH01M 4/5825 Electricity & electronicsH01M 10/0562 Electricity & electronicsMore from Samsung in Batteries & energy
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.