A kind of preparation method of spinel lithium titanate

Abstract

The present invention relates to the preparation method of lithium ion battery electrode material, especially relates to a kind of preparation method of spinel type lithium titanate; In the present invention firstly disperses surfactant, lithium source, titanium source in absolute ethanol and ball mills to obtain the precursor and then drying, calcining, grinding, tableting, calcining, regrinding and other treatments on the precursor, and finally obtain the spinel-type lithium titanate; the present invention uses a surfactant as a dispersant to make The raw materials are mixed more uniformly and dispersed better, and lithium titanate materials with small and uniform particle size and good electrochemical performance can be synthesized at lower calcination temperature and shorter calcination time; High, synthetic materials have good dispersion performance, small particle size, simple process, high production efficiency, environmental friendliness, and easy large-scale production.

Description

technical field [0001] The invention relates to a preparation method of lithium-ion battery electrode materials, in particular to a preparation method for synthesizing spinel-type lithium titanate by a surfactant-assisted solid-phase method. Background technique [0002] At present, commercialized lithium-ion battery anode materials mostly use various carbon anode materials that can deintercalate lithium, but carbon materials have some disadvantages as anode materials for lithium-ion batteries: First, the potential of carbon materials to deintercalate lithium is very close to that of metal lithium , when the battery is overcharged, metal lithium will precipitate on the surface of the carbon electrode to form lithium dendrites, which will pierce the separator and cause an internal short circuit in the battery, which will cause the battery to catch fire or even explode; second, the first irreversible capacity of carbon materials is high; The carbon material is easy to react wi...

AI Technical Summary

Problems solved by technology

[0002] At present, commercialized lithium-ion battery anode materials mostly use various carbon anode materials that can deintercalate lithium, but carbon materials have some disadvantages as anode materials for lithium-ion batteries: First, the potential of carbon materials to deintercalate lithium is very close to that of metal lithium , when the battery is overcharged, metal lithium will precipitate on the surface of the carbon electrode to form lithium dendrites, which will pierce the separator and cause an internal short circuit in the battery, which will cause the battery to catch fire or even explode; second, the first irreversible capacity of carbon materials is high; The carbon material is easy to react with the electrolyte; the fourth is that the carbon material has serious voltage hysteresis; the fifth is that the rate performance of the carbon material is poor; the sixth is that the preparation method of the carbon material is various and complicated

The disadvantage of this method is high energy consumption, and most of the products are micron or submicron in size, and large particles are not conducive to the rapid deintercalation of lithium ions, so the rate performance of high-temperature solid-phase synthesized materials is poor

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