Lithium sodium titanate negative electrode material, preparation method thereof, negative electrode sheet, lithium battery and electric device

By using a mixed spray drying and calcination process involving titanium, sodium, lithium sources and additives, the problems of low capacity and high-temperature synthesis of lithium titanate anode materials were solved, achieving the preparation of high-capacity and low-cost lithium titanate sodium anode materials suitable for lithium-ion batteries.

CN122144781APending Publication Date: 2026-06-05NORTHERN ALTAIR NANOTECH CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHERN ALTAIR NANOTECH CO LTD
Filing Date
2026-01-28
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing lithium titanate anode materials have low theoretical capacity and high voltage plateau, resulting in reduced battery energy density, and also require high synthesis temperature and have high cost.

Method used

A precursor is formed by spray drying a mixture of titanium source, sodium source, lithium source and additives (polyethylene glycol and ethylene glycol), followed by calcination in air. The synergistic effect of polyethylene glycol and ethylene glycol improves the uniformity of raw materials and reduces the synthesis temperature.

Benefits of technology

This improved the initial charge-discharge specific capacity of sodium lithium titanate anode material, reduced the synthesis temperature and cost, and expanded its application range in lithium-ion batteries.

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Abstract

The application relates to the field of lithium ion batteries, and discloses a sodium lithium titanate negative material, a preparation method of the sodium lithium titanate negative material, a negative electrode sheet, a lithium battery and an electric device. In the process of synthesizing the sodium lithium titanate, polyethylene glycol with a suitable molecular weight is added, and a titanium source, a lithium source and a sodium source are mixed, so that the uniformity of raw materials is solved in a precursor stage, the mixture can form a highly uniform and non-agglomerated precursor, the energy barrier of atomic diffusion and rearrangement of the precursor in subsequent heat treatment to form a target crystal phase is lower, and therefore, the reaction can be completed at a relatively lower temperature or in a shorter time; moreover, the sodium lithium titanate prepared by adding the additive also improves the first charge-discharge specific capacity, and can further expand the application range of the sodium lithium titanate material in the lithium ion battery.
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