化工学报2013，Vol.64Issue(1)：374-380,7.DOI:10.3969/j.issn.0438-1157.2013.01.044
K2Ti4O9制备TiO2-B纤维快速嵌锂负极材料
TiO2-B fibres derived from K2Ti4O9 as fast lithium intercalation negative material
摘要
Abstract
TiO2-B fibers were obtained by heat treatment of the precursor of tetratitanate (H2Ti4O9 o xH2O), which was derived from potassium tetratitanate (K2Ti4O9) via ion exchange. Structure characterization showed that TiO2-B fibers sintered at 600 ℃ still maintained pure phase and high crystallinity. Lithium insertion performance indicated that the capacity performance of this TiO2-B material sintered at 600℃ was up to 225 mA · h · g-1 , and was 50 mA · h · g-1 (i. e. 22. 5%) higher than that of the anatase material with similar structure. The TiO2-B fibers exhibited excellent rate performance mainly because the open structure of the TiO2-B fibers led to fast lithium-ion diffusion coefficient of 1. 92×10-7 cm2 · s-1, which was nearly 8 times higher than that of anatase material. 1 C stability test showed that the capacity of TiO2-B fiber was 159 mA · h · g -1 after 80 cycles, which was about 1. 5 times higher than the capacity of anatase material (64 mA · h · g-1).关键词
TiO2-B纤维/四钛酸钾/负极材料/锂离子电池Key words
TiO2-B fibres/potassium tetratitanate/negative materials/lithium ion batteries分类
信息技术与安全科学引用本文复制引用
庄伟,吕玲红,邬新兵,蒙萌,朱育丹,陆小华..K2Ti4O9制备TiO2-B纤维快速嵌锂负极材料[J].化工学报,2013,64(1):374-380,7.基金项目
教育部创新团队项目(PCSIRT0732) （PCSIRT0732）
国家自然科学基金项目(21136004,20736002,21176113,20876073,21136001) （21136004,20736002,21176113,20876073,21136001）
中国博士后科学基金项目(20110491407) （20110491407）
国家重点基础研究发展计划项目(2009CB623407,2009CB219902,2009CB226103). （2009CB623407,2009CB219902,2009CB226103）
