Lithium Secondary Battery Patent Application Published

ChangeBridge: Patent Apps - Batteries (H01M)

Published March 26th, 2026

Detected March 27th, 2026

Summary

The United States Patent and Trademark Office has published a new patent application, US20260088288A1, related to lithium secondary batteries. The application details a battery design that includes activated over-lithiated oxide particles with a coating material, aiming for an upper limit of operation voltage of 4.5 V or less.

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What changed

This document is a publication of a patent application (US20260088288A1) by the USPTO, detailing a novel lithium secondary battery design. The invention focuses on cathode active material particles that are activated over-lithiated oxide particles coated with a specific element, designed to achieve an operational voltage of 4.5 V or less relative to lithium's oxidation-reduction potential.

As this is a patent application publication, it does not impose immediate compliance obligations on manufacturers. However, it signals potential future technological advancements and intellectual property in the battery sector. Companies involved in battery manufacturing or research may wish to review this application for competitive intelligence and to understand emerging technologies in the field.

Source document (simplified)

← USPTO Patent Applications

LITHIUM SECONDARY BATTERY AND OPERATION METHOD THEREFOR

Application US20260088288A1 Kind: A1 Mar 26, 2026

Inventors

Young Uk PARK, Seung Hyun KIM, Yong Hyun CHO, Jae Young CHOI

Abstract

A lithium secondary battery according to exemplary embodiments may include a cathode which includes: a cathode current collector, and a cathode active material layer formed on the cathode current collector and including cathode active material particles; and an anode disposed to face the cathode. The cathode active material particles may include activated over-lithiated oxide particles and a coating material formed on at least a portion of the surface of the activated particles and containing a coating element. An upper limit of operation voltage of the lithium secondary battery may be 4.5 V or less relative to the oxidation-reduction potential of lithium.