尖晶石结构Li4Ti5O12的制备及其电化学性能

上海大学学报(自然科学版) ›› 2012, Vol. 18 ›› Issue (6): 572-576.

尖晶石结构Li₄Ti₅O₁₂的制备及其电化学性能

曹绍梅, 张大卫, 冯欣, 迟涛, 施利毅

1.上海大学纳米科学与技术研究中心,上海 200444； 2.东莞上海大学纳米科学与技术研究院，广东东莞 523770；
3.中国石油上海销售公司,上海 200122)

出版日期:2012-12-28 发布日期:2012-12-28
通讯作者: 施利毅（1963—），男，教授，博士生导师，研究方向为纳米材料的基础研究与产业化应用研究. E-mail：shiliyi@shu.edu.cn
作者简介:施利毅（1963—），男，教授，博士生导师，研究方向为纳米材料的基础研究与产业化应用研究. E-mail：shiliyi@shu.edu.cn
基金资助:
上海市科委纳米专项基金资助项目(1052NM00200)；上海市优青科研专项基金资助项目（SHU09061）

Preparation of Spinel Li₄Ti₅O₁₂ and Electrochemical Performance

CAO Shao-mei, ZHANG Da-wei, FENG Xin, CHI Tao, SHI Li-yi

1. Nano Science and Technology Research Center, Shanghai University, Shanghai 200444, China;
2. Dongguan and Shanghai University Institute of Nano Science and Technology, Dongguan 523770, Guangdong, China;
3. Petrochina Shanghai Marketing Company, Shanghai 200122, China

Online:2012-12-28 Published:2012-12-28

摘要/Abstract

摘要： 以TiO₂和醋酸锂为原料，采用在乙醇中预分散和在液相体系中熔融浸渍的协同共混技术，实现反应物料间微尺度混合，在较低温度下分段煅烧合成纳米结构钛酸锂.X射线衍射（X-ray diffraction,XRD）、扫描电子显微镜（scanning electron microscope，SEM）和粒度分布等测试结果表明，产物为尖晶石结构钛酸锂（Li₄Ti₅O₁₂），平均粒径约为550 nm.以该产物为负极材料组装锂离子电池并测试其电化学性能，结果表明其性能良好，0.1 C倍率下首次充放电比容量高达165 mA·h/g，具有稳定的电压平台，循环性能良好.

关键词: 醋酸锂, 电化学性能, 尖晶石结构, 尖晶石结构钛酸锂（Li₄Ti₅O₁₂）, 制备

Abstract: Nano-sized Li₄Ti₅O₁₂ was prepared at a low temperature with TiO₂ and lithium acetate as starting materials. Atom-sized blending was achieved by the liquid pre-dispersion and melting-soakage with ethyl alcohol as solvent. Calcination was carried out by different steps at relative low temperatures. The X-ray diffraction (XRD), scanning electron microscope (SEM) and size distribution tests showed that the Li₄Ti₅O₁₂ was spinel structure with an average size of about 550 nm. The Li₄Ti₅O₁₂ showed good electrochemical performance with the first charge-discharge capacity achieving 165 mA·h/g at 0.1 C and having a steady voltage and good cyclic performance. 

Key words: electrochemical performance, Li₄Ti₅O₁₂, lithium acetate, preparation, spinel structure

中图分类号:

曹绍梅, 张大卫, 冯欣, 迟涛, 施利毅. 尖晶石结构Li₄Ti₅O₁₂的制备及其电化学性能[J]. 上海大学学报(自然科学版), 2012, 18(6): 572-576.

CAO Shao-mei, ZHANG Da-wei, FENG Xin, CHI Tao, SHI Li-yi. Preparation of Spinel Li₄Ti₅O₁₂ and Electrochemical Performance[J]. Journal of Shanghai University（Natural Science Edition）, 2012, 18(6): 572-576.

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尖晶石结构Li₄Ti₅O₁₂的制备及其电化学性能

Preparation of Spinel Li₄Ti₅O₁₂ and Electrochemical Performance

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