Square acid vanadium-based organic metal framework material, preparation method and lithium ion battery

• Main Authors: LYU HENG, GU TIANTIAN, GAO XINYU, WANG YONGWEN, XUE HAONAN
• Format: Patent
• Language: Chinese; English
• Published: 04.08.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; ELECTRICITY; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention belongs to the technical field of lithium ion battery material preparation, and provides a squaric acid vanadium-based organic metal framework material, a preparation method thereof and a lithium ion battery. The squaric acid vanadium-based organic metal framework material is synthesized by adopting a method of carrying out ion exchange on a vanadium source, squaric acid and a deprotonated substance. The method specifically comprises the following steps: adding a deprotonated substance alkali metal hydroxide into squaric acid, so that squaric acid becomes corresponding squaric acid alkali metal salt; and further adding a vanadium salt solution, replacing the position of the alkali metal salt with vanadium ions, and further growing to form a squaric acid vanadium framework. By utilizing the synergistic effect of metal and ligand in the MOFs skeleton, the comprehensive performance of the squaric acid vanadium-based organic metal skeleton material as the negative electrode material of the lithium i