Positive Electrodes and Rechargeable Lithium Batteries

ChangeBridge: Patent Apps - Batteries (H01M)

Published March 26th, 2026

Detected March 27th, 2026

Summary

The USPTO has published a patent application by SAMSUNG SDI CO., LTD. for a new type of positive electrode and rechargeable lithium battery. The invention aims to increase capacity, reduce production costs, and improve battery performance characteristics.

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What changed

This document is a published patent application (US20260088294A1) from SAMSUNG SDI CO., LTD. detailing a novel positive electrode for rechargeable lithium batteries. The proposed electrode includes a positive electrode current collector and an active material layer containing a positive electrode active material, a copolymer binder, and an amine. The copolymer binder is characterized by a first structural unit with a carboxyl group and a nonionic second structural unit, where the carboxyl group and amine form a salt. The application claims this design enhances capacity, lowers production costs, and improves cycle-life, high-voltage, and high-temperature storage characteristics for lithium batteries.

While this is a patent application and not a regulatory rule, it signifies potential future technological advancements in battery manufacturing. Companies involved in battery production, particularly those focused on lithium-ion technology, may wish to review this application for competitive intelligence or potential licensing opportunities. There are no immediate compliance obligations or deadlines associated with this patent publication.

Source document (simplified)

← USPTO Patent Applications

POSITIVE ELECTRODES AND RECHARGEABLE LITHIUM BATTERIES INCLUDING THE SAME

Application US20260088294A1 Kind: A1 Mar 26, 2026

Assignee

SAMSUNG SDI CO., LTD.

Inventors

Jewon CHOI, Eunji KIM, Yunshik CHO, Kyunghwa JUNG, Kukjoo LEE, Sujin PARK, Minho CHO, Hana KIM, Jungmin LEE, Junghyun NAM

Abstract

Provided is a positive electrode including a positive electrode current collector; and a positive electrode active material layer located on the collector and including a positive electrode active material, a copolymer binder, and an amine. The copolymer binder includes a first structural unit including a carboxyl group and a nonionic second structural unit, and the carboxyl group and the amine are present in a form of a salt. The positive electrode increases capacity while reducing production cost, thereby ensuring long cycle-life characteristics and improving high-voltage characteristics and high-temperature storage characteristics. The rechargeable lithium battery including the positive electrode may exhibit high initial charge/discharge capacity and efficiency even under high voltage driving conditions, and can achieve long cycle-life characteristics.