MUMBAI, India, June 6 -- Intellectual Property India has published a patent application (202517024380 A) filed by Lg Energy Solution, Ltd., Seoul, Republic of Korea, on March 19, for 'method for regenerating positive electrode active material, regenerated positive electrode active material manufactured thereby, and secondary battery comprising same.'
Inventor(s) include Park, Gwangseon; Choi, Jeong Mi; and Lee, Jeongbae.
The application for the patent was published on June 6, under issue no. 23/2025.
According to the abstract released by the Intellectual Property India: "The present invention relates to a method for regenerating a positive electrode active material, a regenerated positive electrode active material manufactured thereby, and a secondary battery comprising same and, more specifically, to a method for regenerating a positive electrode active material, a regenerated positive electrode active material manufactured thereby, and a secondary battery comprising same, wherein the method comprises the steps of: (a) pulverizing a waste positive electrode including a current collector and a positive electrode active material layer coated thereon with a pin mill under dry conditions to obtain the positive electrode active material layer as a powder; (b) heat-treating the positive electrode active material layer powder at 460-530? in the air to recover the positive electrode active material; (c) adding a lithium precursor to the recovered positive electrode active material and annealing at 400-1000?; and (d) washing the annealed positive electrode active material with a washing solution. The method for regenerating a positive electrode active material according to the present invention has the advantages that: the binder and the conductive material can be easily removed even at a lower heat treatment temperature than the prior art; damage to the positive electrode active material due to washing can be minimized; the loss of lithium in the positive electrode active material is reduced to restore the crystalline structure with a small amount of a lithium precursor, along with the recovery of a positive electrode active material superior in battery characteristics; no acids are used for the recovery and regeneration processes, which is eco-friendly and reduces process costs because of no requirement for the neuralization and waste water treatment in response thereto; no metal elements are discarded by regenerating the positive electrode active material as it is without decomposing the positive electrode active material; and there is no risk of toxic gas generation or explosion because no organic solvents are used."
The patent application was internationally filed on Jan. 16, 2024, under International application No.PCT/KR2024/000773.
Disclaimer: Curated by HT Syndication.
