同轴ITO-TiO2纳米管复合材料的储锂性能研究
Lithium Storage Properties of Coaxial ITO-TiO2 Nanotube Composites
陈俊俊 1王梦桃 1李广忠 2李凤仙 1刘意春 1卜恒勇 1李才巨 1方东 1Olim Ruzimuradov3
作者信息
- 1. 昆明理工大学,云南 昆明 650093
- 2. 西北有色金属研究院,陕西西安 710016
- 3. 都灵理工大学,乌兹别克斯坦塔什干 100095
- 折叠
摘要
TiO2负极因其在锂离子电池充放电过程中具有良好的结构稳定性和安全性而受到广泛的关注.然而,TiO2固有的导电性差限制了其在高电流密度下的容量及循环稳定性.本研究采用真空机械压注法和随后的退火处理成功制备了同轴氧化铟锡-TiO2纳米管复合物(ITO-TiO2NTs).作为锂离子电池的负极材料,在0.2 A·g-1的电流密度下,ITO-TiO2NTs在350次循环后表现出295.9 mAh·g-1的高容量.ITO在三维结构中充当导电电芯的角色,提高整体的导电性,促进电子和锂离子快速传输,从而提高复合材料循环稳定性和倍率性能.所提出的真空机械压注法对TiO2纳米管阵列薄膜材料的复合改性提供了简单、高效的方法,具有重要意义.
Abstract
TiO2 anode has received wide attention because of its good structural stability and safety during the charging and discharging of lithium-ion battery.However,the inherent poor conductivity of TiO2 limits its capacity and cycling stability at high current densities.In this paper,coaxial indium tin oxide-TiO2 nanotube complexes(ITO-TiO2NTs)were prepared by vacuum mechanical press injection method and subsequent annealing treatment.As an anode material for Li-ion batteries,ITO-TiO2NTs exhibit a high capacity of 295.9 mAh·g-1 after 350 cycles with the current density of 0.2 A·g-1.The ITO acts as a conductive core in the three-dimensional structure,which improves the overall conductivity and which facilitates the fast electron and Li-ion transfer,thus improving the cycling stability and multiplicity performance of the composite.The vacuum mechanical press injection method is simple and efficient for composite modification of TiO2 nanotube array thin film materials.
关键词
ITO/TiO2纳米管阵列/真空机械压注法/锂离子电池Key words
ITO/TiO2 nanotube arrays/vacuum mechanical press injection method/lithium-ion battery引用本文复制引用
基金项目
科技部重点专项(中国:2021YFE0104300)
科技部重点专项(乌兹别克斯坦:MUK-2021-45)
出版年
2024
NETL
NSTL
万方数据