Samsung patents new material for sodium-ion battery cathodes
Samsung has filed a patent for a specific chemical compound used in the positive part of sodium-ion batteries. The material features a layered structure designed to improve how the battery stores and releases energy.
In the filing’s own words
A cathode active material for a sodium secondary battery, a method of preparing the cathode active material, and a sodium secondary battery including the cathode active material. The cathode active material includes a layered sodium transition metal oxide having an O3 structure, wherein the layered sodium transition metal oxide includes a compound represented by Formula 1: wherein the elemental indices are as described herein.
What exactly they claim (claim 1)
1. A cathode active material for a sodium secondary battery, the cathode active material comprising a layered sodium transition metal oxide having an O3 structure, wherein the layered sodium transition metal oxide includes a compound represented by Formula 1: wherein, in Formula 1, −0.33≤x≤0.1, 0.3≤a≤0.4, 0.3≤b≤0.4, 0≤c≤0.1, d>0, e>0, d>e, a+b+c+d+e=1, and −0.1≤δ≤0.1.
Facts
- Company
- Samsung (Samsung Electronics Co., Ltd.)
- Official title
- CATHODE ACTIVE MATERIAL FOR SODIUM SECONDARY BATTERY, METHOD OF PREPARING THE SAME, AND SODIUM SECONDARY BATTERY INCLUDING THE SAME
- Publication number
- US20260260883A1
- Application number
- 19547798
- Filed
- Feb 24, 2026
- Published
- Sep 3, 2026
- Inventors
- 6
- Claims
- 20
Classified under
H01M 4/525 Electricity & electronicsC01G 53/51 Chemistry & metalsH01M 4/131 Electricity & electronicsH01M 10/054 Electricity & electronicsH01M 10/0585 Electricity & electronicsC01P 2002/50 Chemistry & metalsMore 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.