Preparation method of lithium battery negative electrode material titanium-niobium composite oxide

• Main Authors: PAN JIAHONG, YANG CHENGFU
• Format: Patent
• Language: Chinese; English
• Published: 18.12.2020
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; INORGANIC CHEMISTRY; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; NANOTECHNOLOGY; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TRANSPORTING

The invention relates to a preparation method of a lithium battery negative electrode material TiNb2O7. The preparation method comprises the following steps: according to the stoichiometric ratio of atitanium-niobium composite oxide TiNb2O7, weighing a titanium source and a niobium source in a molar ratio of 1: 2, dissolving in a dispersing agent, and stirring to obtain a uniformly dispersed mixed solution; pouring the mixed solution into a stainless steel reaction kettle with a tetrafluoroethylene lining, putting the stainless steel reaction kettle into a drying oven for solvothermal reaction, and then naturally cooling to room temperature to obtain turbid liquid; centrifugally washing the turbid liquid for multiple times and then putting the precursor into a drying box; and pouring thedried precursor into a crucible, putting the crucible into a muffle furnace, calcining at a certain temperature for a certain time, and cooling to room temperature to obtain the titanium-niobium composite oxide TiNb2O7 materia