纳米TiO_2的电化学嵌锂研究  

Electrochemical Lithium Insertion of Nanosized TiO_2

作　　者：兰英[1] 刘建文[1] 高学平[1] 周杏第[1] 曲金秋[1] 吴锋[1] 宋德瑛[1] 

机构地区：[1]南开大学新能源材料化学研究所,天津300071

出　　处：《电化学》2004年第2期133-136,共4页Journal of Electrochemistry

基　　金：国家重点基础研究发展规划项目 (2 0 0 2CB2 1 1 80 0 );国家自然科学基金 (90 2 0 60 43 );教育部科学技术研究重点项目 (0 3 0 47);高等学校博士学科点专项科研基金 (2 0 0 2 0 0 550 0 7)资助

摘　　要：　应用苛性钠水热法制备粒度均匀、分散性好、质子钛酸盐纳米管(直径约10～15nm).经加热烧结脱水后,该纳米管逐渐转变成具有锐钛矿相结构的纳米柱(直径约15～20nm).初步研究表明,这种具有锐钛矿相结构的纳米柱,其电化学可逆嵌/脱锂容量较高,但循环稳定性还有待改进提高.The protonic titanate nanotubes with the diameter of 10～15 nm were synthesized via hydrothermal method in NaOH solution and the calcined nanotubes at 500 ℃ were transferred to anatase nanorods with the diameter of 12～20 nm due to dehydration.The electrochemical behavior of the anatase nanorods as lithium insertion materials was examined. The results showed that the nanorod electrode had the high initial discharge capacity of 232 mAh/g and second reversible capacity of 198 mAh/g. The capacity of nanorod electrode maintained 152mAh/g after 20 cycles.

关 键 词：纳米柱 二氧化钛 电化学嵌锂性能 锐钛矿相结构 锂离子电池 纳米管 

分 类 号：TM912.9[电气工程—电力电子与电力传动]