摘要
采用简易的水热法制备了具有超薄壁的TiO_(2)(B)纳米管(TBTs)及对比材料TiO_(2)(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1000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。
TiO_(2)(B)nanotubes(TBTs)with ultra-thin walls and TiO_(2)(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 1000 cycles.This work provides a new direction for the preparation of high performance titanium-based oxides.
作者
李虎振
甄蒙蒙
胡振中
LI Huzhen;ZHEN Mengmeng;HU Zhenzhong(School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,China)
出处
《河北工业大学学报》
CAS
2024年第3期58-64,共7页
Journal of Hebei University of Technology
基金
河北省自然科学基金资助项目(B2021202052,B2019202455)
河北省海外高层次人才引进计划基金资助项目(E2019050012)。
关键词
超薄壁
负极材料
锂离子电池
水热法
锂动力学
ultrathin-wall
negative electrode materials
lithium ion battery
hydrothermal method
lithium kinetics
