超薄壁TiO2(B)纳米管制备及其储锂性能研究
Preparation and lithium storage performance of ultrathin-wall TiO2(B)nanotubes
李虎振 1甄蒙蒙 1胡振中1
作者信息
- 1. 河北工业大学 能源与环境工程学院,天津 300401
- 折叠
摘要
采用简易的水热法制备了具有超薄壁的TiO2(B)纳米管(TBTs)及对比材料TiO2(B)纳米棒(TBRs),并通过X射线衍射、扫描电子显微镜、透射电子显微镜和氮气吸附-脱附等温线等分析技术对所制备的超薄壁TBTs和TBRs进行了表征.结果表明,所制备的TBTs材料具有明显的内部空腔、1～2 nm的壁厚及开放的顶端.得益于超薄壁纳米管结构,所制备的TBTs材料作为锂电池负极材料表现出了增强的锂动力学和优异的循环性能,在2.0 C下循环200次时比容量高达212 mA·h·g-1,在5.0 C下循环1 000次时比容量达111 mA·h·g-1.该工作为高性能钛基氧化物的制备提供了新的方向.
Abstract
TiO2(B)nanotubes(TBTs)with ultra-thin walls and TiO2(B)nanorods(TBRs)were prepared by a simple hy-drothermal method.The prepared TBTs and TBRs were characterized by X-ray diffraction,scanning electron microscopy,transmission electron microscopy and nitrogen adsorption-desorption isotherm.The results show that the prepared TBTs material has obvious internal cavity,1-2 nm wall thickness and open tip.Benefiting from the ultrathin-walled nanotube structure,the as-prepared TBTs as anode materials for LIBs exhibited enhanced lithium kinetics and superior cycling performance with high specific capacities of 212 mA·h·g-1 at 2.0 C after 200 cycles and 111 mA·h·g-1 at 5.0 C after 1 000 cycles.This work provides a new direction for the preparation of high performance titanium-based oxides.
关键词
超薄壁/负极材料/锂离子电池/水热法/锂动力学Key words
ultrathin-wall/negative electrode materials/lithium ion battery/hydrothermal method/lithium kinetics引用本文复制引用
基金项目
河北省自然科学基金(B2021202052)
河北省自然科学基金(B2019202455)
河北省海外高层次人才引进计划(E2019050012)
出版年
2024
NETL
NSTL
万方数据