文档介绍：
介孔 TiO2 微米棒的制备及电化学脱嵌锂性
能研究#
丰炳梅,王慧鑫,孙雪,方海涛**
5
10
(哈尔滨工业大学材料科学与工程学院,哈尔滨 150001)
摘要:以价格低且空气中稳定的乙酰丙酮钛为钛源,乙二醇为反应介质,采用多元醇工艺制
备了聚羟基乙酸钛前驱体微米棒,然后将前驱体热解或水解得到介孔 TiO2。500℃热解得到
的 TiO2 由于颗粒烧结,比表面积仅有 g-1,孔隙率为 g-1;水解得到的 TiO2
比表面积与孔隙率与热解得到的 TiO2 相比大大提高,分别为 m2 g-1 和 g-1。
最后对锐钛矿介孔 TiO2 进行电化学性能测试,结果表明水解制备的 TiO2 由于丰富的介孔结
构以及大的比表面积,锂离子扩散路径短,电荷转移极化小,因此倍率性能高于热解制备的
TiO2。
关键词:介孔;TiO2;多元醇;锂离子电池
中图分类号:TB34
15
Synthesis and electrochemical lithium insertion-deinsertion
performance of mesoporous TiO2 microrod
FENG Bingmei, WANG Huixin, SUN xue, FANG Haitao
20
25
30
35
(School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001)
Abstract: With titanium acetylacetone which is cheap and stable in air as a Ti source and ethylene
glycol as the reaction medium, the Ti glycolate microrod was prepared by a polyol process. Then two
mesoporous TiO2 were obtained by the pyrolysis and hydrolysis of Ti glycolate. The BET specific
surface area of the mesoporous anatase TiO2 prepared by the pyrolysis at 500℃ is only g-1,
and its porosity is g-1. parison, the mesoporous anatase TiO2 obtained by the
hydrolysis in boiling water show higher specific surface area and porosity, which are m2 g-1
and g-1 respectively. The electrochemical performances of these two mesoporous TiO2 were
compared. Th