LTO-LFT complex-phase lithium ion battery negative electrode material and preparation method thereof

• Main Authors: LAN DEJUN, ZHAO HONGJUN, CHEN XIAO'E
• Format: Patent
• Language: Chinese; English
• Published: 02.12.2022
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses an LTO-LFT complex-phase lithium ion battery negative electrode material and a preparation method thereof, and belongs to the technical field of preparation of lithium ion battery electrode materials. The preparation method comprises the following steps: a, carrying out calcination pretreatment on a lithium compound, an organic reducing agent and an industrial titanyl sulfate solution serving as raw materials to obtain paste; b, calcining the paste in a reducing atmosphere, and cooling; c, grinding the product, and carrying out aerobic calcination; and d, carrying out carbon coating on the product obtained in the step c to obtain the product. The invention provides the LTO-LFT complex-phase lithium ion battery negative electrode material which is short in preparation flow, simple in process, low in manufacturing cost, high in resource utilization rate and low in waste discharge and the preparation method thereof, and can effectively solve the problems that an existing lithium ion batte