公开(公告)号：US20250027184A1

公开(公告)日：2025-01-23

申请号：US18754272

申请日：2024-06-26

Applicant: CHINA UNIVERSITY OF PETROLEUM-BEIJING

Inventor： Guoyong Huang ,  Jiawei Wen ,  Erkang Feng ,  Wenjie Zhang ,  Mingshuai Wu ,  Tongjun Shen

IPC: C22B34/12 ,  C22B1/02 ,  C22B7/00 ,  H01M10/0525

Abstract: A method for preparing self-doped titanium-niobium oxide negative electrode material using a waste titanium dioxide carrier includes preparing self-doped TiNb2O7 negative electrode material for lithium-ion battery by using waste titanium dioxide carrier comprises the following steps: S1. converting a waste titanium dioxide carrier into TiO2 powder with the Ti content of ≥95% and the Al content of 0.1-4.0%, based on the weight of oxide, respectively; and S2. mixing the TiO2 powder and Nb2O5 powder to form a mixture, roasting the mixture, and collecting the generated Al self-doped TiNb2O7, so as to obtain the self-doped TiNb2O7 negative electrode material. According to the method disclosed by the present invention, impurities represented by TiO2 and Al2O3 in the waste titanium dioxide carrier can be directly recycled, a self-doped TiNb2O7 (titanium niobium oxide) negative electrode material.

公开(公告)号：US20240413353A1

公开(公告)日：2024-12-12

申请号：US18496198

申请日：2023-10-27

Applicant: CHINA UNIVERSITY OF PETROLEUM-BEIJING

Inventor： Guoyong Huang ,  Jiawei Wen ,  Maolin Tian ,  Jian Cui ,  Xueli Wang ,  Wenjie Zhang ,  Mingshuai Wu ,  Tongjun Shen

IPC: H01M4/92

Abstract: A method includes 1) removal oil from aluminum-based platinum rhenium-containing spent catalysts; 2) mixing the spent catalyst and sodium hydroxide powder and heating in an oxygen-free environment to obtain a clinker; 3) leaching the clinker in a weakly alkaline aqueous solution to obtain a first leach solution containing the elements Al and Re and a first leach residue containing Pt and Re; 4) converting the first leaching solution into a sodium meta-aluminate solution and a sodium perrhenate solution; 5) adding an aqueous solution of an acidic reagent and an aqueous solution of an oxidizing reagent to the first leaching residue for oxidizing acid leaching to obtain a second leaching solution containing precursors including platinum and rhenium; 6) reducing and loading the precursors on a carbon carrier to obtain the modified platinum based catalyst for fuel cell. The method enables the recovery of Re and Al elements from spent catalysts.