USPTO Patent Grant for Lithium Iron Phosphate Battery Material

ChangeBridge: Patent Grants - Batteries (H01M)

Published March 24th, 2026

Detected March 26th, 2026

Summary

The USPTO has granted a patent (US12583749B2) to HUBEI WANRUN NEW ENERGY TECHNOLOGY CO., LTD. for a titanium-zirconium co-doped carbon-coated lithium iron phosphate material. This material is designed to enhance ion and electron transport capacity for use as a positive electrode material in lithium-ion power batteries.

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What changed

The United States Patent and Trademark Office (USPTO) has issued patent US12583749B2 for a novel lithium iron phosphate material co-doped with titanium and zirconium, and coated with carbon. The patent, assigned to HUBEI WANRUN NEW ENERGY TECHNOLOGY CO., LTD., details a specific chemical formula (Li1-yZryFe1-xTixPO4/C) and a production method involving mixing, milling, spray-drying, and sintering. The claimed innovation aims to improve the ion and electron transport capacity and compaction density of the material.

This patent grant signifies a new technological development in battery materials, particularly for lithium-ion power batteries. While not a regulatory rule imposing obligations, it impacts manufacturers in the battery sector by potentially influencing future product development and intellectual property landscapes. Companies involved in battery research, development, and manufacturing, especially those utilizing lithium iron phosphate, should be aware of this granted patent and its claims.

Source document (simplified)

← USPTO Patent Grants

Titanium-zirconium co-doped carbon-coated lithium iron phosphate material and production method and use thereof

Grant US12583749B2 Kind: B2 Mar 24, 2026

Assignee

HUBEI WANRUN NEW ENERGY TECHNOLOGY CO., LTD.

Inventors

Minglei Cao, Qin Wang, Jiaojiao Yang

Abstract

Provided is a titanium-zirconium co-doped carbon-coated lithium iron phosphate material and a production method and use thereof. The material has a chemical formula of Li1-yZryFe1-xTixPO4/C, wherein titanium is doped to Fe site, zirconium is doped to Li site, 0.001≤x≤0.05, and 0.001≤y≤0.02. The production method comprises mixing iron phosphate, lithium carbonate, a carbon source, a titanium source and a zirconium source in a liquid medium, ball-milling and sand-milling the mixture to a certain slurry particle size, spray-drying the slurry for granulation, and then sintering the dried spray material in an atmosphere furnace. In the present disclosure, by doping titanium and zirconium elements into carbon-coated lithium iron phosphate, the ion and electron transport capacity of lithium iron phosphate is effectively enhanced and the compaction density of the material is improved. The material is very suitable to be used as a positive electrode material for a lithium-ion power battery.

CPC Classifications

C01B 25/45 H01M 10/0525 H01M 4/08 H01M 4/13 H01M 4/131 H01M 4/139 H01M 4/36 H01M 4/382 H01M 4/405 H01M 4/485 H01M 4/505 C01P 2002/72 C01P 2004/03 C01P 2006/40