US Patent Application for Core-Shell Cathode Active Materials

ChangeBridge: Patent Apps - Batteries (H01M)

Published September 26th, 2024

Detected March 27th, 2026

Summary

The USPTO has published a new patent application (US20260088280A1) for core-shell cathode active materials for rechargeable lithium batteries. The application details specific compositions and operating methods aimed at improving battery performance.

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What changed

This document is a publication of a United States patent application, specifically US20260088280A1, filed on September 26, 2024. The application describes novel core-shell cathode active materials for rechargeable lithium batteries, featuring an interior layered metal oxide and an exterior coating of a lithium composite oxide with a spinel structure. The invention aims to achieve an upper charging limit voltage of at least 3.5 volts and includes specific ratios of lithium ions and initial charge capacities for the interior and exterior components.

This patent application does not impose any immediate regulatory obligations or compliance deadlines on manufacturers. However, it signifies potential future technological advancements in battery materials. Companies involved in the research, development, or manufacturing of lithium-ion batteries, particularly those focusing on high-voltage applications, should be aware of this filing as it may impact future product development and intellectual property landscapes in the energy storage sector.

Source document (simplified)

← USPTO Patent Applications

CORE-SHELL CATHODE ACTIVE MATERIALS

Application US20260088280A1 Kind: A1 Mar 26, 2026

Inventors

Adam Joshua Morris-Cohen, Yuanyuan Ma

Abstract

A cathode active material including an interior and an exterior coating on the interior, and a total amount of lithium ions is provided. The interior has a layered metal oxide, the exterior coating has a lithium composite oxide having a spinel structure, and the cathode active material is for a rechargeable lithium battery having an upper charging limit voltage of at least 3.5 volt. The layered metal oxide includes about 70% to 90% of the total amount of lithium ions, and the lithium composite oxide includes about 5% to 20% of the total amount of lithium ions. A method of operating a rechargeable lithium battery including the cathode active material wherein a ratio of initial charge capacity of the interior to initial charge capacity of the exterior coating is about 5 to 50 is also provided.