USPTO Patent Granted for Sodium Ion Battery Cathode Material

ChangeBridge: Patent Grants - Batteries (H01M)

Published March 24th, 2026

Detected March 26th, 2026

Summary

The USPTO has granted a patent (US12586788B2) to Guizhou Zhenhua E-CHEM Inc. for a novel zinc-containing cathode material for sodium-ion batteries. The patent covers the material's chemical formula, preparation method, and application, aiming to improve battery performance and manufacturing processes.

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What changed

The United States Patent and Trademark Office (USPTO) has granted patent US12586788B2 for a zinc-containing cathode material for sodium-ion batteries. The patent, assigned to Guizhou Zhenhua E-CHEM Inc., details a cathode material with the general chemical formula Na1+aMyZnxO2+c, specifying ranges for the variables a, x, y, and c, and defining M as one or more elements from a list including Mn, Fe, Ni, Co, and others. The patent also outlines specific X-ray diffraction peak characteristics and claims benefits such as low residual alkali content, avoidance of gelation during battery slurrying, and improved capacity and rate performance.

This patent grant represents a new intellectual property asset in the field of battery technology. While not a regulatory rule imposing obligations, it signifies innovation in materials science relevant to energy storage. Companies operating in the battery manufacturing or materials development sectors, particularly those involved with sodium-ion battery technology, should be aware of this granted patent as it may impact their freedom to operate or potential licensing opportunities. No immediate compliance actions are required for regulated entities, but R&D and legal departments may wish to review the patent for competitive intelligence and IP strategy.

Source document (simplified)

← USPTO Patent Grants

Zinc-containing cathode material for sodium ion battery and preparation method and application thereof

Grant US12586788B2 Kind: B2 Mar 24, 2026

Assignee

Guizhou Zhenhua E-CHEM Inc.

Inventors

Chaoyi Zhou, Qianxin Xiang, Jinkai Li, Lu Li

Abstract

The present invention discloses a cathode material for a sodium ion battery and a preparation method and application thereof. The general chemical formula of the cathode material is Na1+aMyZnxO2+c, where −0.40≤a≤0.25, 0.1<x≤0.22, 0.78<y≤0.93, −0.3<c<0.3. M is one or a combination of two or more selected from the group consisting of Mn, Fe, Ni, Co, Al, Zr, Y, Ca, Li, Rb, Cs, W, Ce, Mo, Ba, Ti, Mg, Ta, Nb, V, Sc, Sr, B and Cu. In the powder X-ray diffraction graph, there are at least five diffraction peaks exist when 2θ is 30°-40°. A minor strong peak exist when 2θ is around 16° and a major strong peak exists when 2θ is around 41°. The sodium ion cathode material of the present invention has a low residual alkali content and avoids the occurrence of gelation phenomenon in the battery slurrying process. In addition, the capacity and rate of the sodium ion battery prepared therefrom are at a relatively high level.