一种钛酸镁 / 钛酸钠异质结的制备方法与应用

By constructing a magnesium titanate/sodium titanate heterojunction, the shortcomings of sodium-ion battery electrode materials in terms of energy density and cycle stability have been solved, realizing a high-capacity and long-life sodium-ion battery anode material suitable for large-scale production.

CN118572091BActive Publication Date: 2026-07-17HUBEI UNIV OF TECH +1

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUBEI UNIV OF TECH
Filing Date
2024-07-04
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing sodium-ion battery electrode materials are insufficient in terms of energy density and cycle stability, making it difficult to meet the needs of large-scale production and application.

Method used

Magnesium ions are used to exchange sodium ions in Na2Ti3O7 to construct a magnesium titanate/sodium titanate heterojunction. The heterojunction is synthesized through a simple preparation method and used as a negative electrode material for sodium-ion batteries. This enhances the sodium storage sites and interlayer structure of the material and improves its electrochemical activity.

Benefits of technology

It significantly improves the capacity and cycle life of sodium-ion batteries, providing high energy density and good cycle stability, making it suitable for large-scale production and application.

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Abstract

本发明涉及纳米材料与电化学技术领域,且公开了一种钛酸镁 / 钛酸钠异质结的制备方法,包括有以下步骤:称取硫酸镁粉末倒入去离子水中,充分搅拌获得硫酸镁溶液;将纯相Na2Ti3O7加入所得硫酸镁溶液中,充分搅拌;将所得产物送入到高速离心机中,利用去离子水和乙醇进行交替洗样各三次;将所得产物转入烘箱中烘干,取出即可获得形貌特征良好的钛酸镁 / 钛酸钠异质结。本发明利用镁离子的引入合成钛酸镁 / 钛酸钠异质结,将其作为钠离子电池负极材料,展现出其较高的容量和良好的循环稳定性,并实验证明,钛酸镁 / 钛酸钠异质结具有明显改善的容量和循环寿命,是一种潜在的具有高能量密度的钠离子电池负极材料。
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