纯相Li4Ti5O12水热合成及其电化学性能

doi:10.61558/2993-074X.2104

电化学（中英文） ›› 2013, Vol. 19 ›› Issue (2): 135-140. doi: 10.61558/2993-074X.2104

纯相Li₄Ti₅O₁₂水热合成及其电化学性能

谢文俊，何雨石，王红，廖小珍，马紫峰^*

上海交通大学化学工程系，电化学与能源技术研究所，上海 200240

收稿日期:2012-01-19 修回日期:2012-03-22 出版日期:2013-04-28 发布日期:2012-03-30
通讯作者: 马紫峰 E-mail:zfma@sjtu.edu.cn
基金资助:
国家自然科学基金项目（No. 21006063，No. 21073120）及上海市科委项目（No. 010DZ1202702）

Hydrothermal Synthesis of Pure Li₄Ti₅O₁₂ and Its Electrochemical Performance

XIE Wen-jun, HE Yu-shi, WANG Hong, LIAO Xiao-zhen, MA Zi-feng^*

Institute of Electrochemical and Energy Technology，Department of Chemical Engineering，Shanghai Jiao Tong University，Shanghai 200240，China

Received:2012-01-19 Revised:2012-03-22 Published:2013-04-28 Online:2012-03-30
Contact: MA Zi-feng E-mail:zfma@sjtu.edu.cn

摘要/Abstract

摘要： 以纳米级锐钛矿型二氧化钛（TiO₂）和氢氧化锂（LiOH）为原料，利用水热法合成了尖晶石型Li₄Ti₅O₁₂材料，并研究了LiOH浓度、水热反应时间及热处理温度对Li₄Ti₅O₁₂样品结构和电化学性能的影响，分析了Li₄Ti₅O₁₂的形成过程. 采用X射线衍射（XRD）、扫描电镜（SEM）、透射电镜（TEM）分析样品材料结构，观察材料形貌. 结果表明，LiOH浓度0.2 mol.L^-1、水热反应时间12 h及煅烧温度700 ^oC可得到纯相尖晶石型Li₄Ti₅O₁₂，该样品1C倍率放电比容量为146.3 mAh.g^-1，40C高倍率其放电比容量仍有101.3 mAh.g^-1.

关键词: 高功率, 水热法, Li₄Ti₅O₁₂, 负极材料, 锂离子电池

Abstract: Spinel Li₄Ti₅O₁₂ was prepared by hydrothermal method using commercial anatase (TiO₂) and lithium hydroxide (LiOH) as raw materials. The effects of the LiOH concentration of lithium hydroxide, hydrothermal reaction time and calcination temperature on the structure and electrochemical performance of Li4Ti5O12 were investigated. The formation process of Li₄Ti₅O₁₂ was also proposed. The micro-structure and morphology wereas characterized by XRD, SEM, TEM techniques, and the electrochemical performance was analyzed by galvanostatic charge-discharge test. The results show that the pure phase spinel Li₄Ti₅O₁₂ can be obtained when the LiOH concentration of lithium hydroxide is 0.2 mol.L^-1, the hydrothermal time is 12 h, and the calcination temperature is 700 ^oC. The Li₄Ti₅O₁₂ annealed at 700 oC has excellent electrochemical performance., theThe discharge specific capacity reached 146.3 mAh.g^-1 at the current density of 1C, and exhibited superior high-rate performance of 101.3 mAh.g^-1 at 40C.

Key words: high power, hydrothermal method, Li4Ti5O12, anode material, lithium-ion battery

中图分类号:

TM912.9

谢文俊, 何雨石, 王红, 廖小珍, 马紫峰. 纯相Li₄Ti₅O₁₂水热合成及其电化学性能[J]. 电化学（中英文）, 2013, 19(2): 135-140.

XIE Wen-jun, HE Yu-shi, WANG Hong, LIAO Xiao-zhen, MA Zi-feng. Hydrothermal Synthesis of Pure Li₄Ti₅O₁₂ and Its Electrochemical Performance[J]. Journal of Electrochemistry, 2013, 19(2): 135-140.

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https://electrochem.xmu.edu.cn/CN/Y2013/V19/I2/135

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纯相Li₄Ti₅O₁₂水热合成及其电化学性能

Hydrothermal Synthesis of Pure Li₄Ti₅O₁₂ and Its Electrochemical Performance

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